[GitHub] [incubator-kyuubi] bowenliang123 commented on a diff in pull request #3943: [KYUUBI #3942] adapt Spark's JDBC DataTypes to Hive data type definitions in KyuubiHiveDialect

[GitBox <gi...@apache.org>]

bowenliang123 commented on code in PR #3943:
URL: https://github.com/apache/incubator-kyuubi/pull/3943#discussion_r1044289427


##########
extensions/spark/kyuubi-extension-spark-jdbc-dialect/src/main/scala/org/apache/spark/sql/dialect/KyuubiHiveDialect.scala:
##########
@@ -34,4 +36,24 @@ object KyuubiHiveDialect extends JdbcDialect {
     colName.split('.').map(part => s"`$part`").mkString(".")
   }
 
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+
+    // "INTEGER" is synonym for INT since Hive 2.2.0
+    // fallback to "INT" for better compatibility
+    case IntegerType => Option(JdbcType("INT", java.sql.Types.INTEGER))
+
+    // "DOUBLE PRECISION" alias for "DOUBLE", only available starting with Hive 2.2.0
+    // fallback to "DOUBLE" for better compatibility
+    case DoubleType => Option(JdbcType("DOUBLE", java.sql.Types.DOUBLE))
+
+    // adapt to Hive data type definition

Review Comment:
   Added links to docs and issue of  Hive data type definitions.



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