org.apache.spark.sql.jdbc.DB2Dialect.scala Maven / Gradle / Ivy
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* 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,
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package org.apache.spark.sql.jdbc
import java.sql.Types
import org.apache.spark.sql.types._
private object DB2Dialect extends JdbcDialect {
override def canHandle(url: String): Boolean = url.startsWith("jdbc:db2")
override def getCatalystType(
sqlType: Int,
typeName: String,
size: Int,
md: MetadataBuilder): Option[DataType] = sqlType match {
case Types.REAL => Option(FloatType)
case Types.OTHER =>
typeName match {
case "DECFLOAT" => Option(DecimalType(38, 18))
case "XML" => Option(StringType)
case t if (t.startsWith("TIMESTAMP")) => Option(TimestampType) // TIMESTAMP WITH TIMEZONE
case _ => None
}
case _ => None
}
override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
case StringType => Option(JdbcType("CLOB", java.sql.Types.CLOB))
case BooleanType => Option(JdbcType("CHAR(1)", java.sql.Types.CHAR))
case ShortType | ByteType => Some(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
case _ => None
}
override def isCascadingTruncateTable(): Option[Boolean] = Some(false)
}