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From kavinderd <...@git.apache.org>
Subject [GitHub] incubator-hawq pull request: HAWQ-703. Serialize HCatalog Complex ...
Date Mon, 09 May 2016 18:44:53 GMT
Github user kavinderd commented on a diff in the pull request:

    https://github.com/apache/incubator-hawq/pull/633#discussion_r62551107
  
    --- Diff: pxf/pxf-hive/src/main/java/org/apache/hawq/pxf/plugins/hive/utilities/EnumHiveToHawqType.java
---
    @@ -0,0 +1,113 @@
    +/*
    + * 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.hawq.pxf.plugins.hive.utilities;
    +
    +import org.apache.hawq.pxf.api.utilities.EnumHawqType;
    +import org.apache.hawq.pxf.api.UnsupportedTypeException;
    +
    +/**
    + * 
    + * Hive types, which are supported by plugin, mapped to HAWQ's types
    + * @see EnumHawqType
    + */
    +public enum EnumHiveToHawqType {
    +
    +    TinyintType("tinyint", EnumHawqType.Int2Type),
    +    SmallintType("smallint", EnumHawqType.Int2Type),
    +    IntType("int", EnumHawqType.Int4Type),
    +    BigintType("bigint", EnumHawqType.Int8Type),
    +    BooleanType("boolean", EnumHawqType.BoolType),
    +    FloatType("float", EnumHawqType.Float4Type),
    +    DoubleType("double", EnumHawqType.Float8Type),
    +    StringType("string", EnumHawqType.TextType),
    +    BinaryType("binary", EnumHawqType.ByteaType),
    +    TimestampType("timestamp", EnumHawqType.TimestampType),
    +    DateType("date", EnumHawqType.DateType),
    +    DecimalType("decimal", EnumHawqType.NumericType, "[(,)]"),
    +    VarcharType("varchar", EnumHawqType.VarcharType, "[(,)]"),
    +    CharType("char", EnumHawqType.BpcharType, "[(,)]"),
    +    ArrayType("array", EnumHawqType.TextType, "[<,>]"),
    +    MapType("map", EnumHawqType.TextType, "[<,>]"),
    +    StructType("struct", EnumHawqType.TextType, "[<,>]"),
    +    UnionType("uniontype", EnumHawqType.TextType, "[<,>]");
    +
    +    private String typeName;
    +    private EnumHawqType hawqType;
    +    private String splitExpression;
    +
    +    EnumHiveToHawqType(String typeName, EnumHawqType hawqType) {
    +        this.typeName = typeName;
    +        this.hawqType = hawqType;
    +    }
    +
    +    EnumHiveToHawqType(String typeName, EnumHawqType hawqType, String splitExpression)
{
    +        this(typeName, hawqType);
    +        this.splitExpression = splitExpression;
    +    }
    +
    +    /**
    +     * 
    +     * @return name of type
    +     */
    +    public String getTypeName() {
    +        return this.typeName;
    +    }
    +
    +    /**
    +     * 
    +     * @return corresponding HAWQ type
    +     */
    +    public EnumHawqType getHawqType() {
    +        return this.hawqType;
    +    }
    +
    +    /**
    +     * 
    +     * @return split by expression
    +     */
    +    public String getSplitExpression() {
    +        return this.splitExpression;
    +    }
    +
    +    /**
    +     * Returns Hive to HAWQ type mapping entry for given Hive type 
    +     * 
    +     * @param hiveType full Hive type with modifiers, for example - decimal(10, 0), char(5),
binary, array<string>, map<string,float> etc
    +     * @return corresponding Hive to HAWQ type mapping entry
    +     * @throws UnsupportedTypeException if there is no corresponding HAWQ type
    +     */
    +    public static EnumHiveToHawqType getHiveToHawqType(String hiveType) {
    +        for (EnumHiveToHawqType t : values()) {
    +            String hiveTypeName = hiveType;
    +            String splitExpression = t.getSplitExpression();
    +            if (splitExpression != null) {
    +                String[] tokens = hiveType.split(splitExpression);
    +                hiveTypeName = tokens[0];
    +            }
    +
    +            if (t.getTypeName().toLowerCase().equals(hiveTypeName.toLowerCase())) {
    --- End diff --
    
    Will `t.getTypeName()` ever return NULL?


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