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From ming...@apache.org
Subject [26/66] [abbrv] beam git commit: move all implementation classes/packages into impl package
Date Mon, 11 Sep 2017 20:19:09 GMT
http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/date/BeamSqlExtractExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/date/BeamSqlExtractExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/date/BeamSqlExtractExpressionTest.java
new file mode 100644
index 0000000..0ca7e3e
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/date/BeamSqlExtractExpressionTest.java
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.date;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.avatica.util.TimeUnitRange;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test for {@code BeamSqlExtractExpression}.
+ */
+public class BeamSqlExtractExpressionTest extends BeamSqlDateExpressionTestBase {
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    long time = str2LongTime("2017-05-22 16:17:18");
+
+    // YEAR
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.YEAR));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(2017L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+    // MONTH
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.MONTH));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(5L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+    // DAY
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.DAY));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(22L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+    // DAY_OF_WEEK
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.DOW));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(2L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+    // DAY_OF_YEAR
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.DOY));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(142L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+    // WEEK
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.WEEK));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(21L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+    // QUARTER
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, TimeUnitRange.QUARTER));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT,
+        time));
+    assertEquals(2L,
+        new BeamSqlExtractExpression(operands)
+            .evaluate(BeamSqlFnExecutorTestBase.record).getValue());
+
+  }
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/logical/BeamSqlNotExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/logical/BeamSqlNotExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/logical/BeamSqlNotExpressionTest.java
new file mode 100644
index 0000000..a437db7
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/logical/BeamSqlNotExpressionTest.java
@@ -0,0 +1,47 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.logical;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for {@code BeamSqlNotExpression}.
+ */
+public class BeamSqlNotExpressionTest extends BeamSqlFnExecutorTestBase {
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BOOLEAN, false));
+    Assert.assertTrue(new BeamSqlNotExpression(operands).evaluate(record).getBoolean());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BOOLEAN, true));
+    Assert.assertFalse(new BeamSqlNotExpression(operands).evaluate(record).getBoolean());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BOOLEAN, null));
+    Assert.assertNull(new BeamSqlNotExpression(operands).evaluate(record).getValue());
+  }
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathBinaryExpressionTest.java
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diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathBinaryExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathBinaryExpressionTest.java
new file mode 100644
index 0000000..d42164e
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathBinaryExpressionTest.java
@@ -0,0 +1,201 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.math;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlInputRefExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.runtime.SqlFunctions;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for {@link BeamSqlMathBinaryExpression}.
+ */
+public class BeamSqlMathBinaryExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void testForGreaterThanTwoOperands() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // operands more than 2 not allowed
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 4));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 5));
+    Assert.assertFalse(new BeamSqlRoundExpression(operands).accept());
+  }
+
+  @Test public void testForOneOperand() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // only one operand allowed in round function
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+  }
+
+  @Test public void testForOperandsType() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // varchar operand not allowed
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "2"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 4));
+    Assert.assertFalse(new BeamSqlRoundExpression(operands).accept());
+  }
+
+  @Test public void testRoundFunction() {
+    // test round functions with operands of type bigint, int,
+    // tinyint, smallint, double, decimal
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    // round(double, double) => double
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.0));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 4.0));
+    Assert.assertEquals(2.0, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+    // round(integer,integer) => integer
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    Assert.assertEquals(2, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    // round(long,long) => long
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 5L));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 3L));
+    Assert.assertEquals(5L, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    // round(short) => short
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, new Short("4")));
+    Assert.assertEquals(SqlFunctions.toShort(4),
+        new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    // round(long,long) => long
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 2L));
+    Assert.assertEquals(2L, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    // round(double, long) => double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 1.1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 1L));
+    Assert.assertEquals(1.1, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.368768));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    Assert.assertEquals(2.37, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 3.78683686458));
+    Assert.assertEquals(4.0, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 378.683686458));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, -2));
+    Assert.assertEquals(400.0, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 378.683686458));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, -1));
+    Assert.assertEquals(380.0, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    // round(integer, double) => integer
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.2));
+    Assert.assertEquals(2, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+
+    // operand with a BeamSqlInputRefExpression
+    // to select a column value from row of a record
+    operands.clear();
+    BeamSqlInputRefExpression ref0 = new BeamSqlInputRefExpression(SqlTypeName.BIGINT, 0);
+    operands.add(ref0);
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 2L));
+
+    Assert.assertEquals(1234567L, new BeamSqlRoundExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testPowerFunction() {
+    // test power functions with operands of type bigint, int,
+    // tinyint, smallint, double, decimal
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.0));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 4.0));
+    Assert.assertEquals(16.0, new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+    // power(integer,integer) => long
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    Assert.assertEquals(4.0, new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+    // power(integer,long) => long
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 3L));
+    Assert.assertEquals(8.0, new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+
+    // power(long,long) => long
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 2L));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 2L));
+    Assert.assertEquals(4.0, new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+
+    // power(double, int) => double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 1.1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    Assert.assertEquals(1.1, new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+
+    // power(double, long) => double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 1.1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, 1L));
+    Assert.assertEquals(1.1, new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+
+    // power(integer, double) => double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.2));
+    Assert.assertEquals(Math.pow(2, 2.2),
+        new BeamSqlPowerExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForTruncate() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.0));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 4.0));
+    Assert.assertEquals(2.0, new BeamSqlTruncateExpression(operands).evaluate(record).getValue());
+    // truncate(double, integer) => double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.80685));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 4));
+    Assert.assertEquals(2.8068,
+        new BeamSqlTruncateExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForAtan2() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 0.875));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 0.56));
+    Assert.assertEquals(Math.atan2(0.875, 0.56),
+        new BeamSqlAtan2Expression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathUnaryExpressionTest.java
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diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathUnaryExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathUnaryExpressionTest.java
new file mode 100644
index 0000000..3f3326b
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/math/BeamSqlMathUnaryExpressionTest.java
@@ -0,0 +1,309 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.math;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for {@link BeamSqlMathUnaryExpression}.
+ */
+public class BeamSqlMathUnaryExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void testForGreaterThanOneOperands() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // operands more than 1 not allowed
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 4));
+    Assert.assertFalse(new BeamSqlAbsExpression(operands).accept());
+  }
+
+  @Test public void testForOperandsType() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // varchar operand not allowed
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "2"));
+    Assert.assertFalse(new BeamSqlAbsExpression(operands).accept());
+  }
+
+  @Test public void testForUnaryExpressions() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for sqrt function
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+
+    // test for abs function
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.BIGINT, -28965734597L));
+    Assert
+        .assertEquals(28965734597L, new BeamSqlAbsExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForLnExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for LN function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert.assertEquals(Math.log(2), new BeamSqlLnExpression(operands).evaluate(record).getValue());
+
+    // test for LN function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert
+        .assertEquals(Math.log(2.4), new BeamSqlLnExpression(operands).evaluate(record).getValue());
+    // test for LN function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.log(2.56),
+        new BeamSqlLnExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForLog10Expression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for log10 function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert.assertEquals(Math.log10(2),
+        new BeamSqlLogExpression(operands).evaluate(record).getValue());
+    // test for log10 function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(Math.log10(2.4),
+        new BeamSqlLogExpression(operands).evaluate(record).getValue());
+    // test for log10 function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.log10(2.56),
+        new BeamSqlLogExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForExpExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert
+        .assertEquals(Math.exp(2), new BeamSqlExpExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(Math.exp(2.4),
+        new BeamSqlExpExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.exp(2.56),
+        new BeamSqlExpExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForAcosExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert
+        .assertEquals(Double.NaN, new BeamSqlAcosExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 0.45));
+    Assert.assertEquals(Math.acos(0.45),
+        new BeamSqlAcosExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(-0.367)));
+    Assert.assertEquals(Math.acos(-0.367),
+        new BeamSqlAcosExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForAsinExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type double
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 0.45));
+    Assert.assertEquals(Math.asin(0.45),
+        new BeamSqlAsinExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(-0.367)));
+    Assert.assertEquals(Math.asin(-0.367),
+        new BeamSqlAsinExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForAtanExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type double
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 0.45));
+    Assert.assertEquals(Math.atan(0.45),
+        new BeamSqlAtanExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(-0.367)));
+    Assert.assertEquals(Math.atan(-0.367),
+        new BeamSqlAtanExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForCosExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type double
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 0.45));
+    Assert.assertEquals(Math.cos(0.45),
+        new BeamSqlCosExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(-0.367)));
+    Assert.assertEquals(Math.cos(-0.367),
+        new BeamSqlCosExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForCotExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type double
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, .45));
+    Assert.assertEquals(1.0d / Math.tan(0.45),
+        new BeamSqlCotExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(-.367)));
+    Assert.assertEquals(1.0d / Math.tan(-0.367),
+        new BeamSqlCotExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForDegreesExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert.assertEquals(Math.toDegrees(2),
+        new BeamSqlDegreesExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(Math.toDegrees(2.4),
+        new BeamSqlDegreesExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.toDegrees(2.56),
+        new BeamSqlDegreesExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForRadiansExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert.assertEquals(Math.toRadians(2),
+        new BeamSqlRadiansExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(Math.toRadians(2.4),
+        new BeamSqlRadiansExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.toRadians(2.56),
+        new BeamSqlRadiansExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForSinExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert
+        .assertEquals(Math.sin(2), new BeamSqlSinExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(Math.sin(2.4),
+        new BeamSqlSinExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.sin(2.56),
+        new BeamSqlSinExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForTanExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert
+        .assertEquals(Math.tan(2), new BeamSqlTanExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(Math.tan(2.4),
+        new BeamSqlTanExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(Math.tan(2.56),
+        new BeamSqlTanExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForSignExpression() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    // test for exp function with operand type smallint
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SMALLINT, Short.valueOf("2")));
+    Assert.assertEquals((short) 1, new BeamSqlSignExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type double
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.4));
+    Assert.assertEquals(1.0, new BeamSqlSignExpression(operands).evaluate(record).getValue());
+    // test for exp function with operand type decimal
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DECIMAL, BigDecimal.valueOf(2.56)));
+    Assert.assertEquals(BigDecimal.ONE,
+        new BeamSqlSignExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForPi() {
+    Assert.assertEquals(Math.PI, new BeamSqlPiExpression().evaluate(record).getValue());
+  }
+
+  @Test public void testForCeil() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.68687979));
+    Assert.assertEquals(Math.ceil(2.68687979),
+        new BeamSqlCeilExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void testForFloor() {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.DOUBLE, 2.68687979));
+    Assert.assertEquals(Math.floor(2.68687979),
+        new BeamSqlFloorExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlCharLengthExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlCharLengthExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlCharLengthExpressionTest.java
new file mode 100644
index 0000000..118097f
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlCharLengthExpressionTest.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlCharLengthExpression.
+ */
+public class BeamSqlCharLengthExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    assertEquals(5,
+        new BeamSqlCharLengthExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlConcatExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlConcatExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlConcatExpressionTest.java
new file mode 100644
index 0000000..c3f8041
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlConcatExpressionTest.java
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlConcatExpression.
+ */
+public class BeamSqlConcatExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void accept() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "world"));
+    assertTrue(new BeamSqlConcatExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "world"));
+    assertFalse(new BeamSqlConcatExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "world"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    assertFalse(new BeamSqlConcatExpression(operands).accept());
+  }
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, " world"));
+    Assert.assertEquals("hello world",
+        new BeamSqlConcatExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlInitCapExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlInitCapExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlInitCapExpressionTest.java
new file mode 100644
index 0000000..24f9945
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlInitCapExpressionTest.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test of BeamSqlInitCapExpression.
+ */
+public class BeamSqlInitCapExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello world"));
+    assertEquals("Hello World",
+        new BeamSqlInitCapExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hEllO wOrld"));
+    assertEquals("Hello World",
+        new BeamSqlInitCapExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello     world"));
+    assertEquals("Hello     World",
+        new BeamSqlInitCapExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlLowerExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlLowerExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlLowerExpressionTest.java
new file mode 100644
index 0000000..e34fcc0
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlLowerExpressionTest.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test of BeamSqlLowerExpression.
+ */
+public class BeamSqlLowerExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "HELLO"));
+    assertEquals("hello",
+        new BeamSqlLowerExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlOverlayExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlOverlayExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlOverlayExpressionTest.java
new file mode 100644
index 0000000..09bbdc8
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlOverlayExpressionTest.java
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlOverlayExpression.
+ */
+public class BeamSqlOverlayExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void accept() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertTrue(new BeamSqlOverlayExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    assertTrue(new BeamSqlOverlayExpression(operands).accept());
+  }
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "w3333333rce"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "resou"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 3));
+    Assert.assertEquals("w3resou3rce",
+        new BeamSqlOverlayExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "w3333333rce"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "resou"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 3));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 4));
+    Assert.assertEquals("w3resou33rce",
+        new BeamSqlOverlayExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "w3333333rce"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "resou"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 3));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 5));
+    Assert.assertEquals("w3resou3rce",
+        new BeamSqlOverlayExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "w3333333rce"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "resou"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 3));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 7));
+    Assert.assertEquals("w3resouce",
+        new BeamSqlOverlayExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlPositionExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlPositionExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlPositionExpressionTest.java
new file mode 100644
index 0000000..4c21a71
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlPositionExpressionTest.java
@@ -0,0 +1,84 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlPositionExpression.
+ */
+public class BeamSqlPositionExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void accept() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "worldhello"));
+    assertTrue(new BeamSqlPositionExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "worldhello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertTrue(new BeamSqlPositionExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "worldhello"));
+    assertFalse(new BeamSqlPositionExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "worldhello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertFalse(new BeamSqlPositionExpression(operands).accept());
+  }
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "worldhello"));
+    assertEquals(5, new BeamSqlPositionExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "worldhello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertEquals(5, new BeamSqlPositionExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "world"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertEquals(-1, new BeamSqlPositionExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlStringUnaryExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlStringUnaryExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlStringUnaryExpressionTest.java
new file mode 100644
index 0000000..b999ca1
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlStringUnaryExpressionTest.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlStringUnaryExpression.
+ */
+public class BeamSqlStringUnaryExpressionTest {
+
+  @Test public void accept() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    assertTrue(new BeamSqlCharLengthExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertFalse(new BeamSqlCharLengthExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    assertFalse(new BeamSqlCharLengthExpression(operands).accept());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlSubstringExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlSubstringExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlSubstringExpressionTest.java
new file mode 100644
index 0000000..2fb451e
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlSubstringExpressionTest.java
@@ -0,0 +1,101 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlSubstringExpression.
+ */
+public class BeamSqlSubstringExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void accept() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertTrue(new BeamSqlSubstringExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    assertTrue(new BeamSqlSubstringExpression(operands).accept());
+  }
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    assertEquals("hello",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 2));
+    assertEquals("he",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 5));
+    assertEquals("hello",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 100));
+    assertEquals("hello",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 0));
+    assertEquals("",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, 1));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, -1));
+    assertEquals("",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.INTEGER, -1));
+    assertEquals("o",
+        new BeamSqlSubstringExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlTrimExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlTrimExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlTrimExpressionTest.java
new file mode 100644
index 0000000..6f9c706
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlTrimExpressionTest.java
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.fun.SqlTrimFunction;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for BeamSqlTrimExpression.
+ */
+public class BeamSqlTrimExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void accept() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, " hello "));
+    assertTrue(new BeamSqlTrimExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, SqlTrimFunction.Flag.BOTH));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "he"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hehe__hehe"));
+    assertTrue(new BeamSqlTrimExpression(operands).accept());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "he"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hehe__hehe"));
+    assertFalse(new BeamSqlTrimExpression(operands).accept());
+  }
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, SqlTrimFunction.Flag.LEADING));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "he"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hehe__hehe"));
+    Assert.assertEquals("__hehe",
+        new BeamSqlTrimExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, SqlTrimFunction.Flag.TRAILING));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "he"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hehe__hehe"));
+    Assert.assertEquals("hehe__",
+        new BeamSqlTrimExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.SYMBOL, SqlTrimFunction.Flag.BOTH));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "he"));
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "__"));
+    Assert.assertEquals("__",
+        new BeamSqlTrimExpression(operands).evaluate(record).getValue());
+
+    operands.clear();
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, " hello "));
+    Assert.assertEquals("hello",
+        new BeamSqlTrimExpression(operands).evaluate(record).getValue());
+  }
+
+  @Test public void leadingTrim() throws Exception {
+    assertEquals("__hehe",
+        BeamSqlTrimExpression.leadingTrim("hehe__hehe", "he"));
+  }
+
+  @Test public void trailingTrim() throws Exception {
+    assertEquals("hehe__",
+        BeamSqlTrimExpression.trailingTrim("hehe__hehe", "he"));
+  }
+
+  @Test public void trim() throws Exception {
+    assertEquals("__",
+        BeamSqlTrimExpression.leadingTrim(
+        BeamSqlTrimExpression.trailingTrim("hehe__hehe", "he"), "he"
+        ));
+  }
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlUpperExpressionTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlUpperExpressionTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlUpperExpressionTest.java
new file mode 100644
index 0000000..e69a3a5
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/interpreter/operator/string/BeamSqlUpperExpressionTest.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.string;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.BeamSqlFnExecutorTestBase;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlExpression;
+import org.apache.beam.sdk.extensions.sql.impl.interpreter.operator.BeamSqlPrimitive;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.junit.Test;
+
+/**
+ * Test of BeamSqlUpperExpression.
+ */
+public class BeamSqlUpperExpressionTest extends BeamSqlFnExecutorTestBase {
+
+  @Test public void evaluate() throws Exception {
+    List<BeamSqlExpression> operands = new ArrayList<>();
+
+    operands.add(BeamSqlPrimitive.of(SqlTypeName.VARCHAR, "hello"));
+    assertEquals("HELLO",
+        new BeamSqlUpperExpression(operands).evaluate(record).getValue());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamIntersectRelTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamIntersectRelTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamIntersectRelTest.java
new file mode 100644
index 0000000..5a3f65d
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamIntersectRelTest.java
@@ -0,0 +1,119 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.rel;
+
+import java.sql.Types;
+import org.apache.beam.sdk.extensions.sql.BeamSqlCli;
+import org.apache.beam.sdk.extensions.sql.BeamSqlEnv;
+import org.apache.beam.sdk.extensions.sql.TestUtils;
+import org.apache.beam.sdk.extensions.sql.mock.MockedBoundedTable;
+import org.apache.beam.sdk.extensions.sql.schema.BeamSqlRow;
+import org.apache.beam.sdk.testing.PAssert;
+import org.apache.beam.sdk.testing.TestPipeline;
+import org.apache.beam.sdk.values.PCollection;
+import org.junit.BeforeClass;
+import org.junit.Rule;
+import org.junit.Test;
+
+/**
+ * Test for {@code BeamIntersectRel}.
+ */
+public class BeamIntersectRelTest {
+  static BeamSqlEnv sqlEnv = new BeamSqlEnv();
+
+  @Rule
+  public final TestPipeline pipeline = TestPipeline.create();
+
+  @BeforeClass
+  public static void prepare() {
+    sqlEnv.registerTable("ORDER_DETAILS1",
+        MockedBoundedTable.of(
+            Types.BIGINT, "order_id",
+            Types.INTEGER, "site_id",
+            Types.DOUBLE, "price"
+        ).addRows(
+            1L, 1, 1.0,
+            1L, 1, 1.0,
+            2L, 2, 2.0,
+            4L, 4, 4.0
+        )
+    );
+
+    sqlEnv.registerTable("ORDER_DETAILS2",
+        MockedBoundedTable.of(
+            Types.BIGINT, "order_id",
+            Types.INTEGER, "site_id",
+            Types.DOUBLE, "price"
+        ).addRows(
+            1L, 1, 1.0,
+            2L, 2, 2.0,
+            3L, 3, 3.0
+        )
+    );
+  }
+
+  @Test
+  public void testIntersect() throws Exception {
+    String sql = "";
+    sql += "SELECT order_id, site_id, price "
+        + "FROM ORDER_DETAILS1 "
+        + " INTERSECT "
+        + "SELECT order_id, site_id, price "
+        + "FROM ORDER_DETAILS2 ";
+
+    PCollection<BeamSqlRow> rows = BeamSqlCli.compilePipeline(sql, pipeline, sqlEnv);
+    PAssert.that(rows).containsInAnyOrder(
+        TestUtils.RowsBuilder.of(
+            Types.BIGINT, "order_id",
+            Types.INTEGER, "site_id",
+            Types.DOUBLE, "price"
+        ).addRows(
+            1L, 1, 1.0,
+            2L, 2, 2.0
+        ).getRows());
+
+    pipeline.run().waitUntilFinish();
+  }
+
+  @Test
+  public void testIntersectAll() throws Exception {
+    String sql = "";
+    sql += "SELECT order_id, site_id, price "
+        + "FROM ORDER_DETAILS1 "
+        + " INTERSECT ALL "
+        + "SELECT order_id, site_id, price "
+        + "FROM ORDER_DETAILS2 ";
+
+    PCollection<BeamSqlRow> rows = BeamSqlCli.compilePipeline(sql, pipeline, sqlEnv);
+    PAssert.that(rows).satisfies(new CheckSize(3));
+
+    PAssert.that(rows).containsInAnyOrder(
+        TestUtils.RowsBuilder.of(
+            Types.BIGINT, "order_id",
+            Types.INTEGER, "site_id",
+            Types.DOUBLE, "price"
+        ).addRows(
+            1L, 1, 1.0,
+            1L, 1, 1.0,
+            2L, 2, 2.0
+        ).getRows());
+
+    pipeline.run();
+  }
+}

http://git-wip-us.apache.org/repos/asf/beam/blob/7eb113b3/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamJoinRelBoundedVsBoundedTest.java
----------------------------------------------------------------------
diff --git a/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamJoinRelBoundedVsBoundedTest.java b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamJoinRelBoundedVsBoundedTest.java
new file mode 100644
index 0000000..c4f6350
--- /dev/null
+++ b/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamJoinRelBoundedVsBoundedTest.java
@@ -0,0 +1,204 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.beam.sdk.extensions.sql.impl.rel;
+
+import java.sql.Types;
+import org.apache.beam.sdk.extensions.sql.BeamSqlCli;
+import org.apache.beam.sdk.extensions.sql.BeamSqlEnv;
+import org.apache.beam.sdk.extensions.sql.TestUtils;
+import org.apache.beam.sdk.extensions.sql.mock.MockedBoundedTable;
+import org.apache.beam.sdk.extensions.sql.schema.BeamSqlRow;
+import org.apache.beam.sdk.testing.PAssert;
+import org.apache.beam.sdk.testing.TestPipeline;
+import org.apache.beam.sdk.values.PCollection;
+import org.junit.BeforeClass;
+import org.junit.Rule;
+import org.junit.Test;
+
+/**
+ * Bounded + Bounded Test for {@code BeamJoinRel}.
+ */
+public class BeamJoinRelBoundedVsBoundedTest {
+  @Rule
+  public final TestPipeline pipeline = TestPipeline.create();
+  private static final BeamSqlEnv beamSqlEnv = new BeamSqlEnv();
+
+  public static final MockedBoundedTable ORDER_DETAILS1 =
+      MockedBoundedTable.of(
+          Types.INTEGER, "order_id",
+          Types.INTEGER, "site_id",
+          Types.INTEGER, "price"
+      ).addRows(
+          1, 2, 3,
+          2, 3, 3,
+          3, 4, 5
+      );
+
+  public static final MockedBoundedTable ORDER_DETAILS2 =
+      MockedBoundedTable.of(
+          Types.INTEGER, "order_id",
+          Types.INTEGER, "site_id",
+          Types.INTEGER, "price"
+      ).addRows(
+          1, 2, 3,
+          2, 3, 3,
+          3, 4, 5
+      );
+
+  @BeforeClass
+  public static void prepare() {
+    beamSqlEnv.registerTable("ORDER_DETAILS1", ORDER_DETAILS1);
+    beamSqlEnv.registerTable("ORDER_DETAILS2", ORDER_DETAILS2);
+  }
+
+  @Test
+  public void testInnerJoin() throws Exception {
+    String sql =
+        "SELECT *  "
+        + "FROM ORDER_DETAILS1 o1"
+        + " JOIN ORDER_DETAILS2 o2"
+        + " on "
+        + " o1.order_id=o2.site_id AND o2.price=o1.site_id"
+        ;
+
+    PCollection<BeamSqlRow> rows = BeamSqlCli.compilePipeline(sql, pipeline, beamSqlEnv);
+    PAssert.that(rows).containsInAnyOrder(
+        TestUtils.RowsBuilder.of(
+            Types.INTEGER, "order_id",
+            Types.INTEGER, "site_id",
+            Types.INTEGER, "price",
+            Types.INTEGER, "order_id0",
+            Types.INTEGER, "site_id0",
+            Types.INTEGER, "price0"
+        ).addRows(
+            2, 3, 3, 1, 2, 3
+        ).getRows());
+    pipeline.run();
+  }
+
+  @Test
+  public void testLeftOuterJoin() throws Exception {
+    String sql =
+        "SELECT *  "
+            + "FROM ORDER_DETAILS1 o1"
+            + " LEFT OUTER JOIN ORDER_DETAILS2 o2"
+            + " on "
+            + " o1.order_id=o2.site_id AND o2.price=o1.site_id"
+        ;
+
+    PCollection<BeamSqlRow> rows = BeamSqlCli.compilePipeline(sql, pipeline, beamSqlEnv);
+    pipeline.enableAbandonedNodeEnforcement(false);
+    PAssert.that(rows).containsInAnyOrder(
+        TestUtils.RowsBuilder.of(
+            Types.INTEGER, "order_id",
+            Types.INTEGER, "site_id",
+            Types.INTEGER, "price",
+            Types.INTEGER, "order_id0",
+            Types.INTEGER, "site_id0",
+            Types.INTEGER, "price0"
+        ).addRows(
+            1, 2, 3, null, null, null,
+            2, 3, 3, 1, 2, 3,
+            3, 4, 5, null, null, null
+        ).getRows());
+    pipeline.run();
+  }
+
+  @Test
+  public void testRightOuterJoin() throws Exception {
+    String sql =
+        "SELECT *  "
+            + "FROM ORDER_DETAILS1 o1"
+            + " RIGHT OUTER JOIN ORDER_DETAILS2 o2"
+            + " on "
+            + " o1.order_id=o2.site_id AND o2.price=o1.site_id"
+        ;
+
+    PCollection<BeamSqlRow> rows = BeamSqlCli.compilePipeline(sql, pipeline, beamSqlEnv);
+    PAssert.that(rows).containsInAnyOrder(
+        TestUtils.RowsBuilder.of(
+            Types.INTEGER, "order_id",
+            Types.INTEGER, "site_id",
+            Types.INTEGER, "price",
+            Types.INTEGER, "order_id0",
+            Types.INTEGER, "site_id0",
+            Types.INTEGER, "price0"
+        ).addRows(
+            2, 3, 3, 1, 2, 3,
+            null, null, null, 2, 3, 3,
+            null, null, null, 3, 4, 5
+        ).getRows());
+    pipeline.run();
+  }
+
+  @Test
+  public void testFullOuterJoin() throws Exception {
+    String sql =
+        "SELECT *  "
+            + "FROM ORDER_DETAILS1 o1"
+            + " FULL OUTER JOIN ORDER_DETAILS2 o2"
+            + " on "
+            + " o1.order_id=o2.site_id AND o2.price=o1.site_id"
+        ;
+
+    PCollection<BeamSqlRow> rows = BeamSqlCli.compilePipeline(sql, pipeline, beamSqlEnv);
+    PAssert.that(rows).containsInAnyOrder(
+        TestUtils.RowsBuilder.of(
+          Types.INTEGER, "order_id",
+          Types.INTEGER, "site_id",
+          Types.INTEGER, "price",
+          Types.INTEGER, "order_id0",
+          Types.INTEGER, "site_id0",
+          Types.INTEGER, "price0"
+        ).addRows(
+          2, 3, 3, 1, 2, 3,
+          1, 2, 3, null, null, null,
+          3, 4, 5, null, null, null,
+          null, null, null, 2, 3, 3,
+          null, null, null, 3, 4, 5
+        ).getRows());
+    pipeline.run();
+  }
+
+  @Test(expected = UnsupportedOperationException.class)
+  public void testException_nonEqualJoin() throws Exception {
+    String sql =
+        "SELECT *  "
+            + "FROM ORDER_DETAILS1 o1"
+            + " JOIN ORDER_DETAILS2 o2"
+            + " on "
+            + " o1.order_id>o2.site_id"
+        ;
+
+    pipeline.enableAbandonedNodeEnforcement(false);
+    BeamSqlCli.compilePipeline(sql, pipeline, beamSqlEnv);
+    pipeline.run();
+  }
+
+  @Test(expected = UnsupportedOperationException.class)
+  public void testException_crossJoin() throws Exception {
+    String sql =
+        "SELECT *  "
+            + "FROM ORDER_DETAILS1 o1, ORDER_DETAILS2 o2";
+
+    pipeline.enableAbandonedNodeEnforcement(false);
+    BeamSqlCli.compilePipeline(sql, pipeline, beamSqlEnv);
+    pipeline.run();
+  }
+}


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