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From dsetrak...@apache.org
Subject [41/61] [abbrv] incubator-ignite git commit: sprint-1 - JDBC renaming and reshuffling.
Date Fri, 06 Feb 2015 04:25:54 GMT
http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/17d816fe/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSet.java
----------------------------------------------------------------------
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSet.java b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSet.java
new file mode 100644
index 0000000..8677312
--- /dev/null
+++ b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSet.java
@@ -0,0 +1,1519 @@
+/*
+ * 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.ignite.internal.jdbc;
+
+import org.apache.ignite.client.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+
+import java.io.*;
+import java.math.*;
+import java.net.*;
+import java.sql.*;
+import java.sql.Date;
+import java.util.*;
+
+/**
+ * JDBC result set implementation.
+ */
+public class JdbcResultSet implements ResultSet {
+    /** Task name. */
+    private static final String TASK_NAME =
+        "org.apache.ignite.internal.processors.cache.query.jdbc.GridCacheQueryJdbcTask";
+
+    /** Statement. */
+    private final JdbcStatement stmt;
+
+    /** Node ID. */
+    private final UUID nodeId;
+
+    /** Future ID. */
+    private final UUID futId;
+
+    /** Table names. */
+    private final List<String> tbls;
+
+    /** Column names. */
+    private final List<String> cols;
+
+    /** Class names. */
+    private final List<String> types;
+
+    /** Fields iterator. */
+    private Iterator<List<Object>> fields;
+
+    /** Finished flag. */
+    private boolean finished;
+
+    /** Current position. */
+    private int pos;
+
+    /** Current. */
+    private List<Object> curr;
+
+    /** Closed flag. */
+    private boolean closed;
+
+    /** Was {@code NULL} flag. */
+    private boolean wasNull;
+
+    /** Fetch size. */
+    private int fetchSize;
+
+    /**
+     * Creates new result set.
+     *
+     * @param stmt Statement.
+     * @param nodeId Node ID.
+     * @param futId Future ID.
+     * @param tbls Table names.
+     * @param cols Column names.
+     * @param types Types.
+     * @param fields Fields.
+     * @param finished Finished flag.
+     * @param fetchSize Fetch size.
+     */
+    JdbcResultSet(JdbcStatement stmt, UUID nodeId, UUID futId,
+        List<String> tbls, List<String> cols, List<String> types,
+        Collection<List<Object>> fields, boolean finished, int fetchSize) {
+        assert stmt != null;
+        assert nodeId != null;
+        assert futId != null;
+        assert tbls != null;
+        assert cols != null;
+        assert types != null;
+        assert fields != null;
+        assert fetchSize > 0;
+
+        this.stmt = stmt;
+        this.nodeId = nodeId;
+        this.futId = futId;
+        this.tbls = tbls;
+        this.cols = cols;
+        this.types = types;
+        this.fetchSize = fetchSize;
+        this.fields = fields.iterator();
+        this.finished = finished;
+    }
+
+    /**
+     * Creates new result set with predefined fields.
+     * Result set created with this constructor will
+     * never execute remote tasks.
+     *
+     * @param stmt Statement.
+     * @param tbls Table names.
+     * @param cols Column names.
+     * @param types Types.
+     * @param fields Fields.
+     */
+    JdbcResultSet(JdbcStatement stmt, List<String> tbls, List<String> cols,
+        List<String> types, Collection<List<Object>> fields) {
+        assert stmt != null;
+        assert tbls != null;
+        assert cols != null;
+        assert types != null;
+        assert fields != null;
+
+        this.stmt = stmt;
+        this.tbls = tbls;
+        this.cols = cols;
+        this.types = types;
+        this.fields = fields.iterator();
+
+        nodeId = null;
+        futId = null;
+
+        // Prevent task execution.
+        finished = true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean next() throws SQLException {
+        ensureNotClosed();
+
+        if (fields == null && !finished) {
+            assert nodeId != null;
+            assert futId != null;
+
+            try {
+                GridClientCompute compute = stmt.connection().client().compute();
+
+                GridClientCompute prj = compute.projection(compute.node(nodeId));
+
+                byte[] packet = prj.execute(TASK_NAME, JdbcUtils.marshalArgument(
+                    JdbcUtils.taskArgument(nodeId, futId, fetchSize, stmt.getMaxRows())));
+
+                byte status = packet[0];
+                byte[] data = new byte[packet.length - 1];
+
+                U.arrayCopy(packet, 1, data, 0, data.length);
+
+                if (status == 1)
+                    throw JdbcUtils.unmarshalError(data);
+                else {
+                    List<?> msg = JdbcUtils.unmarshal(data);
+
+                    assert msg.size() == 2;
+
+                    fields = ((Collection<List<Object>>)msg.get(0)).iterator();
+                    finished = (Boolean)msg.get(1);
+                }
+            }
+            catch (GridClientException e) {
+                throw new SQLException("Failed to query GridGain.", e);
+            }
+        }
+
+        if (fields != null && fields.hasNext()) {
+            curr = fields.next();
+
+            if (!fields.hasNext())
+                fields = null;
+
+            pos++;
+
+            return true;
+        }
+        else {
+            curr = null;
+
+            return false;
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void close() throws SQLException {
+        closed = true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean wasNull() throws SQLException {
+        return wasNull;
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getString(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, String.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean getBoolean(int colIdx) throws SQLException {
+        Boolean val = getTypedValue(colIdx, Boolean.class);
+
+        return val != null ? val : false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public byte getByte(int colIdx) throws SQLException {
+        Byte val = getTypedValue(colIdx, Byte.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public short getShort(int colIdx) throws SQLException {
+        Short val = getTypedValue(colIdx, Short.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getInt(int colIdx) throws SQLException {
+        Integer val = getTypedValue(colIdx, Integer.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public long getLong(int colIdx) throws SQLException {
+        Long val = getTypedValue(colIdx, Long.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public float getFloat(int colIdx) throws SQLException {
+        Float val = getTypedValue(colIdx, Float.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public double getDouble(int colIdx) throws SQLException {
+        Double val = getTypedValue(colIdx, Double.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public BigDecimal getBigDecimal(int colIdx, int scale) throws SQLException {
+        return getTypedValue(colIdx, BigDecimal.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public byte[] getBytes(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, byte[].class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Date getDate(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, Date.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Time getTime(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, Time.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Timestamp getTimestamp(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, Timestamp.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public InputStream getAsciiStream(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public InputStream getUnicodeStream(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public InputStream getBinaryStream(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Stream are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getString(String colLb) throws SQLException {
+        return getTypedValue(colLb, String.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean getBoolean(String colLb) throws SQLException {
+        Boolean val = getTypedValue(colLb, Boolean.class);
+
+        return val != null ? val : false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public byte getByte(String colLb) throws SQLException {
+        Byte val = getTypedValue(colLb, Byte.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public short getShort(String colLb) throws SQLException {
+        Short val = getTypedValue(colLb, Short.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getInt(String colLb) throws SQLException {
+        Integer val = getTypedValue(colLb, Integer.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public long getLong(String colLb) throws SQLException {
+        Long val = getTypedValue(colLb, Long.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public float getFloat(String colLb) throws SQLException {
+        Float val = getTypedValue(colLb, Float.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public double getDouble(String colLb) throws SQLException {
+        Double val = getTypedValue(colLb, Double.class);
+
+        return val != null ? val : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public BigDecimal getBigDecimal(String colLb, int scale) throws SQLException {
+        return getTypedValue(colLb, BigDecimal.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public byte[] getBytes(String colLb) throws SQLException {
+        return getTypedValue(colLb, byte[].class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Date getDate(String colLb) throws SQLException {
+        return getTypedValue(colLb, Date.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Time getTime(String colLb) throws SQLException {
+        return getTypedValue(colLb, Time.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Timestamp getTimestamp(String colLb) throws SQLException {
+        return getTypedValue(colLb, Timestamp.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public InputStream getAsciiStream(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public InputStream getUnicodeStream(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public InputStream getBinaryStream(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public SQLWarning getWarnings() throws SQLException {
+        ensureNotClosed();
+
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void clearWarnings() throws SQLException {
+        ensureNotClosed();
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getCursorName() throws SQLException {
+        ensureNotClosed();
+
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override public ResultSetMetaData getMetaData() throws SQLException {
+        ensureNotClosed();
+
+        return new JdbcResultSetMetadata(tbls, cols, types);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Object getObject(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, Object.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Object getObject(String colLb) throws SQLException {
+        return getTypedValue(colLb, Object.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public int findColumn(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        int idx = cols.indexOf(colLb.toUpperCase());
+
+        if (idx == -1)
+            throw new SQLException("Column not found: " + colLb);
+
+        return idx + 1;
+    }
+
+    /** {@inheritDoc} */
+    @Override public Reader getCharacterStream(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Reader getCharacterStream(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Streams are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public BigDecimal getBigDecimal(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, BigDecimal.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public BigDecimal getBigDecimal(String colLb) throws SQLException {
+        return getTypedValue(colLb, BigDecimal.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isBeforeFirst() throws SQLException {
+        ensureNotClosed();
+
+        return pos < 1;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isAfterLast() throws SQLException {
+        ensureNotClosed();
+
+        return finished && fields == null && curr == null;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isFirst() throws SQLException {
+        ensureNotClosed();
+
+        return pos == 1;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isLast() throws SQLException {
+        ensureNotClosed();
+
+        return finished && fields == null && curr != null;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void beforeFirst() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void afterLast() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean first() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean last() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getRow() throws SQLException {
+        ensureNotClosed();
+
+        return isAfterLast() ? 0 : pos;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean absolute(int row) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean relative(int rows) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean previous() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLException("Result set is forward-only.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setFetchDirection(int direction) throws SQLException {
+        ensureNotClosed();
+
+        if (direction != FETCH_FORWARD)
+            throw new SQLFeatureNotSupportedException("Only forward direction is supported");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getFetchDirection() throws SQLException {
+        ensureNotClosed();
+
+        return FETCH_FORWARD;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setFetchSize(int fetchSize) throws SQLException {
+        ensureNotClosed();
+
+        if (fetchSize <= 0)
+            throw new SQLException("Fetch size must be greater than zero.");
+
+        this.fetchSize = fetchSize;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getFetchSize() throws SQLException {
+        ensureNotClosed();
+
+        return fetchSize;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getType() throws SQLException {
+        ensureNotClosed();
+
+        return stmt.getResultSetType();
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getConcurrency() throws SQLException {
+        ensureNotClosed();
+
+        return CONCUR_READ_ONLY;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean rowUpdated() throws SQLException {
+        ensureNotClosed();
+
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean rowInserted() throws SQLException {
+        ensureNotClosed();
+
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean rowDeleted() throws SQLException {
+        ensureNotClosed();
+
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNull(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBoolean(int colIdx, boolean x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateByte(int colIdx, byte x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateShort(int colIdx, short x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateInt(int colIdx, int x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateLong(int colIdx, long x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateFloat(int colIdx, float x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateDouble(int colIdx, double x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBigDecimal(int colIdx, BigDecimal x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateString(int colIdx, String x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBytes(int colIdx, byte[] x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateDate(int colIdx, Date x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateTime(int colIdx, Time x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateTimestamp(int colIdx, Timestamp x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateAsciiStream(int colIdx, InputStream x, int len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBinaryStream(int colIdx, InputStream x, int len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateCharacterStream(int colIdx, Reader x, int len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateObject(int colIdx, Object x, int scaleOrLen) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateObject(int colIdx, Object x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNull(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBoolean(String colLb, boolean x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateByte(String colLb, byte x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateShort(String colLb, short x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateInt(String colLb, int x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateLong(String colLb, long x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateFloat(String colLb, float x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateDouble(String colLb, double x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBigDecimal(String colLb, BigDecimal x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateString(String colLb, String x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBytes(String colLb, byte[] x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateDate(String colLb, Date x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateTime(String colLb, Time x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateTimestamp(String colLb, Timestamp x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateAsciiStream(String colLb, InputStream x, int len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBinaryStream(String colLb, InputStream x, int len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateCharacterStream(String colLb, Reader reader, int len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateObject(String colLb, Object x, int scaleOrLen) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateObject(String colLb, Object x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void insertRow() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateRow() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void deleteRow() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void refreshRow() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Row refreshing is not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void cancelRowUpdates() throws SQLException {
+        ensureNotClosed();
+    }
+
+    /** {@inheritDoc} */
+    @Override public void moveToInsertRow() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void moveToCurrentRow() throws SQLException {
+        ensureNotClosed();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Statement getStatement() throws SQLException {
+        ensureNotClosed();
+
+        return stmt;
+    }
+
+    /** {@inheritDoc} */
+    @Override public Object getObject(int colIdx, Map<String, Class<?>> map) throws SQLException {
+        return getTypedValue(colIdx, Object.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Ref getRef(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Blob getBlob(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Clob getClob(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Array getArray(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Object getObject(String colLb, Map<String, Class<?>> map) throws SQLException {
+        return getTypedValue(colLb, Object.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Ref getRef(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Blob getBlob(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Clob getClob(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Array getArray(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Date getDate(int colIdx, Calendar cal) throws SQLException {
+        return getTypedValue(colIdx, Date.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Date getDate(String colLb, Calendar cal) throws SQLException {
+        return getTypedValue(colLb, Date.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Time getTime(int colIdx, Calendar cal) throws SQLException {
+        return getTypedValue(colIdx, Time.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Time getTime(String colLb, Calendar cal) throws SQLException {
+        return getTypedValue(colLb, Time.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Timestamp getTimestamp(int colIdx, Calendar cal) throws SQLException {
+        return getTypedValue(colIdx, Timestamp.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public Timestamp getTimestamp(String colLb, Calendar cal) throws SQLException {
+        return getTypedValue(colLb, Timestamp.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public URL getURL(int colIdx) throws SQLException {
+        return getTypedValue(colIdx, URL.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public URL getURL(String colLb) throws SQLException {
+        return getTypedValue(colLb, URL.class);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateRef(int colIdx, Ref x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateRef(String colLb, Ref x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBlob(int colIdx, Blob x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBlob(String colLb, Blob x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateClob(int colIdx, Clob x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateClob(String colLb, Clob x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateArray(int colIdx, Array x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateArray(String colLb, Array x) throws SQLException {
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public RowId getRowId(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public RowId getRowId(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateRowId(int colIdx, RowId x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateRowId(String colLb, RowId x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getHoldability() throws SQLException {
+        ensureNotClosed();
+
+        return HOLD_CURSORS_OVER_COMMIT;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isClosed() throws SQLException {
+        return closed;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNString(int colIdx, String nStr) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNString(String colLb, String nStr) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNClob(int colIdx, NClob nClob) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNClob(String colLb, NClob nClob) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public NClob getNClob(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public NClob getNClob(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public SQLXML getSQLXML(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public SQLXML getSQLXML(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateSQLXML(int colIdx, SQLXML xmlObj) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateSQLXML(String colLb, SQLXML xmlObj) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getNString(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getNString(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Reader getNCharacterStream(int colIdx) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Reader getNCharacterStream(String colLb) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("SQL-specific types are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNCharacterStream(int colIdx, Reader x, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNCharacterStream(String colLb, Reader reader, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateAsciiStream(int colIdx, InputStream x, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBinaryStream(int colIdx, InputStream x, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateCharacterStream(int colIdx, Reader x, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateAsciiStream(String colLb, InputStream x, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBinaryStream(String colLb, InputStream x, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateCharacterStream(String colLb, Reader reader, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBlob(int colIdx, InputStream inputStream, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBlob(String colLb, InputStream inputStream, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateClob(int colIdx, Reader reader, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateClob(String colLb, Reader reader, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNClob(int colIdx, Reader reader, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNClob(String colLb, Reader reader, long len) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNCharacterStream(int colIdx, Reader x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNCharacterStream(String colLb, Reader reader) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateAsciiStream(int colIdx, InputStream x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBinaryStream(int colIdx, InputStream x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateCharacterStream(int colIdx, Reader x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateAsciiStream(String colLb, InputStream x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBinaryStream(String colLb, InputStream x) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateCharacterStream(String colLb, Reader reader) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBlob(int colIdx, InputStream inputStream) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateBlob(String colLb, InputStream inputStream) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateClob(int colIdx, Reader reader) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateClob(String colLb, Reader reader) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNClob(int colIdx, Reader reader) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void updateNClob(String colLb, Reader reader) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public <T> T unwrap(Class<T> iface) throws SQLException {
+        if (!isWrapperFor(iface))
+            throw new SQLException("Result set is not a wrapper for " + iface.getName());
+
+        return (T)this;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return iface != null && iface == ResultSet.class;
+    }
+
+    /** {@inheritDoc} */
+    @Override public <T> T getObject(int colIdx, Class<T> type) throws SQLException {
+        return getTypedValue(colIdx, type);
+    }
+
+    /** {@inheritDoc} */
+    @Override public <T> T getObject(String colLb, Class<T> type) throws SQLException {
+        return getTypedValue(colLb, type);
+    }
+
+    /**
+     * Gets casted field value by label.
+     *
+     * @param colLb Column label.
+     * @param cls Value class.
+     * @return Casted field value.
+     * @throws SQLException In case of error.
+     */
+    private <T> T getTypedValue(String colLb, Class<T> cls) throws SQLException {
+        ensureNotClosed();
+        ensureHasCurrentRow();
+
+        int colIdx = cols.indexOf(colLb.toUpperCase()) + 1;
+
+        if (colIdx <= 0)
+            throw new SQLException("Invalid column label: " + colLb);
+
+        return getTypedValue(colIdx, cls);
+    }
+
+    /**
+     * Gets casted field value by index.
+     *
+     * @param colIdx Column index.
+     * @param cls Value class.
+     * @return Casted field value.
+     * @throws SQLException In case of error.
+     */
+    private <T> T getTypedValue(int colIdx, Class<T> cls) throws SQLException {
+        ensureNotClosed();
+        ensureHasCurrentRow();
+
+        try {
+            T val = cls == String.class ? (T)String.valueOf(curr.get(colIdx - 1)) : (T)curr.get(colIdx - 1);
+
+            wasNull = val == null;
+
+            return val;
+        }
+        catch (IndexOutOfBoundsException ignored) {
+            throw new SQLException("Invalid column index: " + colIdx);
+        }
+        catch (ClassCastException ignored) {
+            throw new SQLException("Value is an not instance of " + cls.getName());
+        }
+    }
+
+    /**
+     * Ensures that result set is not closed.
+     *
+     * @throws SQLException If result set is closed.
+     */
+    private void ensureNotClosed() throws SQLException {
+        if (closed)
+            throw new SQLException("Result set is closed.");
+    }
+
+    /**
+     * Ensures that result set is positioned on a row.
+     *
+     * @throws SQLException If result set is not positioned on a row.
+     */
+    private void ensureHasCurrentRow() throws SQLException {
+        if (curr == null)
+            throw new SQLException("Result set is not positioned on a row.");
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/17d816fe/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSetMetadata.java
----------------------------------------------------------------------
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSetMetadata.java b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSetMetadata.java
new file mode 100644
index 0000000..32da631
--- /dev/null
+++ b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcResultSetMetadata.java
@@ -0,0 +1,170 @@
+/*
+ * 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.ignite.internal.jdbc;
+
+import java.sql.*;
+import java.util.*;
+
+/**
+ * JDBC result set metadata implementation.
+ */
+public class JdbcResultSetMetadata implements ResultSetMetaData {
+    /** Column width. */
+    private static final int COL_WIDTH = 30;
+
+    /** Table names. */
+    private final List<String> tbls;
+
+    /** Column names. */
+    private final List<String> cols;
+
+    /** Class names. */
+    private final List<String> types;
+
+    /**
+     * @param tbls Table names.
+     * @param cols Column names.
+     * @param types Types.
+     */
+    JdbcResultSetMetadata(List<String> tbls, List<String> cols, List<String> types) {
+        assert cols != null;
+        assert types != null;
+
+        this.tbls = tbls;
+        this.cols = cols;
+        this.types = types;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getColumnCount() throws SQLException {
+        return cols.size();
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isAutoIncrement(int col) throws SQLException {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isCaseSensitive(int col) throws SQLException {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isSearchable(int col) throws SQLException {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isCurrency(int col) throws SQLException {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int isNullable(int col) throws SQLException {
+        return columnNullable;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isSigned(int col) throws SQLException {
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getColumnDisplaySize(int col) throws SQLException {
+        return COL_WIDTH;
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getColumnLabel(int col) throws SQLException {
+        return cols.get(col - 1);
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getColumnName(int col) throws SQLException {
+        return cols.get(col - 1);
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getSchemaName(int col) throws SQLException {
+        return "";
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getPrecision(int col) throws SQLException {
+        return 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getScale(int col) throws SQLException {
+        return 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getTableName(int col) throws SQLException {
+        return tbls != null ? tbls.get(col - 1) : "";
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getCatalogName(int col) throws SQLException {
+        return "";
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getColumnType(int col) throws SQLException {
+        return JdbcUtils.type(types.get(col - 1));
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getColumnTypeName(int col) throws SQLException {
+        return JdbcUtils.typeName(types.get(col - 1));
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isReadOnly(int col) throws SQLException {
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isWritable(int col) throws SQLException {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isDefinitelyWritable(int col) throws SQLException {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public String getColumnClassName(int col) throws SQLException {
+        return types.get(col - 1);
+    }
+
+    /** {@inheritDoc} */
+    @Override public <T> T unwrap(Class<T> iface) throws SQLException {
+        if (!isWrapperFor(iface))
+            throw new SQLException("Result set meta data is not a wrapper for " + iface.getName());
+
+        return (T)this;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return iface == ResultSetMetaData.class;
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/17d816fe/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcStatement.java
----------------------------------------------------------------------
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcStatement.java b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcStatement.java
new file mode 100644
index 0000000..84fdf93
--- /dev/null
+++ b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcStatement.java
@@ -0,0 +1,448 @@
+/*
+ * 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.ignite.internal.jdbc;
+
+import org.apache.ignite.client.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+
+import java.sql.*;
+import java.util.*;
+
+import static java.sql.ResultSet.*;
+
+/**
+ * JDBC statement implementation.
+ */
+public class JdbcStatement implements Statement {
+    /** Task name. */
+    private static final String TASK_NAME =
+        "org.apache.ignite.internal.processors.cache.query.jdbc.GridCacheQueryJdbcTask";
+
+    /** Default fetch size. */
+    private static final int DFLT_FETCH_SIZE = 1024;
+
+    /** Connection. */
+    private final JdbcConnection conn;
+
+    /** Closed flag. */
+    private boolean closed;
+
+    /** Rows limit. */
+    private int maxRows;
+
+    /** Query timeout. */
+    private int timeout;
+
+    /** Current result set. */
+    private ResultSet rs;
+
+    /** Query arguments. */
+    protected Object[] args;
+
+    /** Fetch size. */
+    private int fetchSize = DFLT_FETCH_SIZE;
+
+    /**
+     * Creates new statement.
+     *
+     * @param conn Connection.
+     */
+    JdbcStatement(JdbcConnection conn) {
+        assert conn != null;
+
+        this.conn = conn;
+    }
+
+    /** {@inheritDoc} */
+    @Override public ResultSet executeQuery(String sql) throws SQLException {
+        ensureNotClosed();
+
+        rs = null;
+
+        if (sql == null || sql.isEmpty())
+            throw new SQLException("SQL query is empty");
+
+        try {
+            byte[] packet = conn.client().compute().execute(TASK_NAME,
+                JdbcUtils.marshalArgument(JdbcUtils.taskArgument(conn.nodeId(), conn.cacheName(), sql,
+                    timeout, args, fetchSize, maxRows)));
+
+            byte status = packet[0];
+            byte[] data = new byte[packet.length - 1];
+
+            U.arrayCopy(packet, 1, data, 0, data.length);
+
+            if (status == 1)
+                throw JdbcUtils.unmarshalError(data);
+            else {
+                List<?> msg = JdbcUtils.unmarshal(data);
+
+                assert msg.size() == 7;
+
+                UUID nodeId = (UUID)msg.get(0);
+                UUID futId = (UUID)msg.get(1);
+                List<String> tbls = (List<String>)msg.get(2);
+                List<String> cols = (List<String>)msg.get(3);
+                List<String> types = (List<String>)msg.get(4);
+                Collection<List<Object>> fields = (Collection<List<Object>>)msg.get(5);
+                boolean finished = (Boolean)msg.get(6);
+
+                return new JdbcResultSet(this, nodeId, futId, tbls, cols, types, fields, finished, fetchSize);
+            }
+        }
+        catch (GridClientException e) {
+            throw new SQLException("Failed to query GridGain.", e);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public int executeUpdate(String sql) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void close() throws SQLException {
+        closed = true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getMaxFieldSize() throws SQLException {
+        ensureNotClosed();
+
+        return 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setMaxFieldSize(int max) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Field size limitation is not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getMaxRows() throws SQLException {
+        ensureNotClosed();
+
+        return maxRows;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setMaxRows(int maxRows) throws SQLException {
+        ensureNotClosed();
+
+        this.maxRows = maxRows;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setEscapeProcessing(boolean enable) throws SQLException {
+        ensureNotClosed();
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getQueryTimeout() throws SQLException {
+        ensureNotClosed();
+
+        return timeout;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setQueryTimeout(int timeout) throws SQLException {
+        ensureNotClosed();
+
+        this.timeout = timeout * 1000;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void cancel() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Cancellation is not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public SQLWarning getWarnings() throws SQLException {
+        ensureNotClosed();
+
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void clearWarnings() throws SQLException {
+        ensureNotClosed();
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setCursorName(String name) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean execute(String sql) throws SQLException {
+        ensureNotClosed();
+
+        rs = executeQuery(sql);
+
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public ResultSet getResultSet() throws SQLException {
+        ensureNotClosed();
+
+        ResultSet rs0 = rs;
+
+        rs = null;
+
+        return rs0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getUpdateCount() throws SQLException {
+        ensureNotClosed();
+
+        return -1;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean getMoreResults() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Multiple open results are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setFetchDirection(int direction) throws SQLException {
+        ensureNotClosed();
+
+        if (direction != FETCH_FORWARD)
+            throw new SQLFeatureNotSupportedException("Only forward direction is supported");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getFetchDirection() throws SQLException {
+        ensureNotClosed();
+
+        return FETCH_FORWARD;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setFetchSize(int fetchSize) throws SQLException {
+        ensureNotClosed();
+
+        if (fetchSize <= 0)
+            throw new SQLException("Fetch size must be greater than zero.");
+
+        this.fetchSize = fetchSize;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getFetchSize() throws SQLException {
+        ensureNotClosed();
+
+        return fetchSize;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getResultSetConcurrency() throws SQLException {
+        ensureNotClosed();
+
+        return CONCUR_READ_ONLY;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getResultSetType() throws SQLException {
+        ensureNotClosed();
+
+        return TYPE_FORWARD_ONLY;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void addBatch(String sql) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public void clearBatch() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int[] executeBatch() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public Connection getConnection() throws SQLException {
+        ensureNotClosed();
+
+        return conn;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean getMoreResults(int curr) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Multiple open results are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public ResultSet getGeneratedKeys() throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int executeUpdate(String sql, int[] colIndexes) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public int executeUpdate(String sql, String[] colNames) throws SQLException {
+        ensureNotClosed();
+
+        throw new SQLFeatureNotSupportedException("Updates are not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
+        ensureNotClosed();
+
+        if (autoGeneratedKeys == RETURN_GENERATED_KEYS)
+            throw new SQLFeatureNotSupportedException("Updates are not supported.");
+
+        return execute(sql);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean execute(String sql, int[] colIndexes) throws SQLException {
+        ensureNotClosed();
+
+        if (colIndexes != null && colIndexes.length > 0)
+            throw new SQLFeatureNotSupportedException("Updates are not supported.");
+
+        return execute(sql);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean execute(String sql, String[] colNames) throws SQLException {
+        ensureNotClosed();
+
+        if (colNames != null && colNames.length > 0)
+            throw new SQLFeatureNotSupportedException("Updates are not supported.");
+
+        return execute(sql);
+    }
+
+    /** {@inheritDoc} */
+    @Override public int getResultSetHoldability() throws SQLException {
+        ensureNotClosed();
+
+        return HOLD_CURSORS_OVER_COMMIT;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isClosed() throws SQLException {
+        return closed;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void setPoolable(boolean poolable) throws SQLException {
+        ensureNotClosed();
+
+        if (poolable)
+            throw new SQLFeatureNotSupportedException("Pooling is not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isPoolable() throws SQLException {
+        ensureNotClosed();
+
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public <T> T unwrap(Class<T> iface) throws SQLException {
+        if (!isWrapperFor(iface))
+            throw new SQLException("Statement is not a wrapper for " + iface.getName());
+
+        return (T)this;
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return iface != null && iface == Statement.class;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void closeOnCompletion() throws SQLException {
+        throw new SQLFeatureNotSupportedException("closeOnCompletion is not supported.");
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isCloseOnCompletion() throws SQLException {
+        ensureNotClosed();
+
+        return false;
+    }
+
+    /**
+     * Sets timeout in milliseconds.
+     *
+     * @param timeout Timeout.
+     */
+    void timeout(int timeout) {
+        this.timeout = timeout;
+    }
+
+    /**
+     * @return Connection.
+     */
+    JdbcConnection connection() {
+        return conn;
+    }
+
+    /**
+     * Ensures that statement is not closed.
+     *
+     * @throws SQLException If statement is closed.
+     */
+    protected void ensureNotClosed() throws SQLException {
+        if (closed)
+            throw new SQLException("Statement is closed.");
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/17d816fe/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcUtils.java
----------------------------------------------------------------------
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcUtils.java b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcUtils.java
new file mode 100644
index 0000000..f18c03d
--- /dev/null
+++ b/modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcUtils.java
@@ -0,0 +1,232 @@
+/*
+ * 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.ignite.internal.jdbc;
+
+import org.apache.ignite.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+import org.apache.ignite.marshaller.*;
+import org.apache.ignite.marshaller.jdk.*;
+
+import java.sql.*;
+import java.util.*;
+import java.util.Date;
+
+import static java.sql.Types.*;
+
+/**
+ * Utility methods for JDBC driver.
+ */
+class JdbcUtils {
+    /** Marshaller. */
+    private static final IgniteMarshaller MARSHALLER = new IgniteJdkMarshaller();
+
+    /**
+     * Marshals task argument to byte array.
+     *
+     * @param args Task argument.
+     * @return Byte array.
+     * @throws SQLException In marshalling failed.
+     */
+    public static byte[] marshalArgument(Map<String, Object> args) throws SQLException {
+        assert args != null;
+
+        try {
+            return MARSHALLER.marshal(args);
+        }
+        catch (IgniteCheckedException e) {
+            throw new SQLException("Failed to unmarshal result.", e);
+        }
+    }
+
+    /**
+     * Unmarshals exception from byte array.
+     *
+     * @param bytes Byte array.
+     * @return Exception.
+     * @throws SQLException If unmarshalling failed.
+     */
+    public static SQLException unmarshalError(byte[] bytes) throws SQLException {
+        return unmarshal(bytes);
+    }
+
+    /**
+     * Unmarshals object from byte array.
+     *
+     * @param bytes Byte array.
+     * @return Object.
+     * @throws SQLException If unmarshalling failed.
+     */
+    public static <T> T unmarshal(byte[] bytes) throws SQLException {
+        assert bytes != null;
+
+        try {
+            return MARSHALLER.unmarshal(bytes, null);
+        }
+        catch (IgniteCheckedException e) {
+            throw new SQLException("Failed to unmarshal result.", e);
+        }
+    }
+
+    /**
+     * Creates task argument for first execution.
+     *
+     * @param nodeId Node ID.
+     * @param cacheName Cache name.
+     * @param sql SQL query.
+     * @param timeout Query timeout.
+     * @param args Query arguments.
+     * @param pageSize Page size.
+     * @param maxRows Maximum number of rows.
+     * @return Task argument.
+     */
+    public static Map<String, Object> taskArgument(UUID nodeId, String cacheName, String sql,
+        long timeout, Object[] args, int pageSize, int maxRows) {
+        assert sql != null;
+        assert timeout >= 0;
+        assert pageSize > 0;
+        assert maxRows >= 0;
+
+        Map<String, Object> map = U.newHashMap(7);
+
+        map.put("confNodeId", nodeId);
+        map.put("cache", cacheName);
+        map.put("sql", sql);
+        map.put("timeout", timeout);
+        map.put("args", args != null ? Arrays.asList(args) : Collections.emptyList());
+        map.put("pageSize", pageSize);
+        map.put("maxRows", maxRows);
+
+        return map;
+    }
+
+    /**
+     * Creates task argument.
+     *
+     * @param nodeId Node ID.
+     * @param futId Future ID.
+     * @param pageSize Page size.
+     * @param maxRows Maximum number of rows.
+     * @return Task argument.
+     */
+    public static Map<String, Object> taskArgument(UUID nodeId, UUID futId, int pageSize, int maxRows) {
+        assert nodeId != null;
+        assert futId != null;
+        assert pageSize > 0;
+        assert maxRows >= 0;
+
+        Map<String, Object> map = U.newHashMap(4);
+
+        map.put("nodeId", nodeId);
+        map.put("futId", futId);
+        map.put("pageSize", pageSize);
+        map.put("maxRows", maxRows);
+
+        return map;
+    }
+
+    /**
+     * Converts Java class name to type from {@link Types}.
+     *
+     * @param cls Java class name.
+     * @return Type from {@link Types}.
+     */
+    @SuppressWarnings("IfMayBeConditional")
+    public static int type(String cls) {
+        if (Boolean.class.getName().equals(cls) || boolean.class.getName().equals(cls))
+            return BOOLEAN;
+        else if (Byte.class.getName().equals(cls) || byte.class.getName().equals(cls))
+            return TINYINT;
+        else if (Short.class.getName().equals(cls) || short.class.getName().equals(cls))
+            return SMALLINT;
+        else if (Integer.class.getName().equals(cls) || int.class.getName().equals(cls))
+            return INTEGER;
+        else if (Long.class.getName().equals(cls) || long.class.getName().equals(cls))
+            return BIGINT;
+        else if (Float.class.getName().equals(cls) || float.class.getName().equals(cls))
+            return FLOAT;
+        else if (Double.class.getName().equals(cls) || double.class.getName().equals(cls))
+            return DOUBLE;
+        else if (String.class.getName().equals(cls))
+            return VARCHAR;
+        else if (byte[].class.getName().equals(cls))
+            return BINARY;
+        else if (Time.class.getName().equals(cls))
+            return TIME;
+        else if (Timestamp.class.getName().equals(cls))
+            return TIMESTAMP;
+        else if (Date.class.getName().equals(cls))
+            return DATE;
+        else
+            return OTHER;
+    }
+
+    /**
+     * Converts Java class name to SQL type name.
+     *
+     * @param cls Java class name.
+     * @return SQL type name.
+     */
+    @SuppressWarnings("IfMayBeConditional")
+    public static String typeName(String cls) {
+        if (Boolean.class.getName().equals(cls) || boolean.class.getName().equals(cls))
+            return "BOOLEAN";
+        else if (Byte.class.getName().equals(cls) || byte.class.getName().equals(cls))
+            return "TINYINT";
+        else if (Short.class.getName().equals(cls) || short.class.getName().equals(cls))
+            return "SMALLINT";
+        else if (Integer.class.getName().equals(cls) || int.class.getName().equals(cls))
+            return "INTEGER";
+        else if (Long.class.getName().equals(cls) || long.class.getName().equals(cls))
+            return "BIGINT";
+        else if (Float.class.getName().equals(cls) || float.class.getName().equals(cls))
+            return "FLOAT";
+        else if (Double.class.getName().equals(cls) || double.class.getName().equals(cls))
+            return "DOUBLE";
+        else if (String.class.getName().equals(cls))
+            return "VARCHAR";
+        else if (byte[].class.getName().equals(cls))
+            return "BINARY";
+        else if (Time.class.getName().equals(cls))
+            return "TIME";
+        else if (Timestamp.class.getName().equals(cls))
+            return "TIMESTAMP";
+        else if (Date.class.getName().equals(cls))
+            return "DATE";
+        else
+            return "OTHER";
+    }
+
+    /**
+     * Determines whether type is nullable.
+     *
+     * @param name Column name.
+     * @param cls Java class name.
+     * @return {@code True} if nullable.
+     */
+    public static boolean nullable(String name, String cls) {
+        return !"_KEY".equalsIgnoreCase(name) &&
+            !"_VAL".equalsIgnoreCase(name) &&
+            !(boolean.class.getName().equals(cls) ||
+            byte.class.getName().equals(cls) ||
+            short.class.getName().equals(cls) ||
+            int.class.getName().equals(cls) ||
+            long.class.getName().equals(cls) ||
+            float.class.getName().equals(cls) ||
+            double.class.getName().equals(cls));
+    }
+}


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