Thomas D'Silva created SPARK-26499:
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Summary: JdbcUtils.getCatalystType maps TINYINT to IntegerType
instead of ByteType
Key: SPARK-26499
URL: https://issues.apache.org/jira/browse/SPARK-26499
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.4.0
Reporter: Thomas D'Silva
I am trying to use the DataSource V2 API to read from a JDBC source. While
using {{JdbcUtils.resultSetToSparkInternalRows}} to create an internal row from
a ResultSet that has a column of type TINYINT I ran into the following exception
{code:java}
java.lang.IllegalArgumentException: Unsupported type tinyint
at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.org$apache$spark$sql$execution$datasources$jdbc$JdbcUtils$$makeGetter(JdbcUtils.scala:502)
at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$org$apache$spark$sql$execution$datasources$jdbc$JdbcUtils$$makeGetters$1.apply(JdbcUtils.scala:379)
at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$org$apache$spark$sql$execution$datasources$jdbc$JdbcUtils$$makeGetters$1.apply(JdbcUtils.scala:379)
at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:186)
at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.org$apache$spark$sql$execution$datasources$jdbc$JdbcUtils$$makeGetters(JdbcUtils.scala:379)
at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anon$1.<init>(JdbcUtils.scala:340)
{code}
This happens because ByteType is not handled in {{JdbcUtils.makeGetter}}.
Also, since {{JdbcUtils.getCommonJDBCType}} maps ByteType to TinyInt, I think
{{getCatalystType}} should map TINYINT to ByteType (it currently maps TINYINT
to IntegerType).
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