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[SPARK-17355] Workaround for HIVE-14684 / HiveResultSetMetaData.isSigned exception #14911

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[SPARK-17355] Workaround for HIVE-14684 / HiveResultSetMetaData.isSigned exception #14911

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11 changes: 10 additions & 1 deletion sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -136,7 +136,16 @@ object JDBCRDD extends Logging {
val typeName = rsmd.getColumnTypeName(i + 1)
val fieldSize = rsmd.getPrecision(i + 1)
val fieldScale = rsmd.getScale(i + 1)
val isSigned = rsmd.isSigned(i + 1)
val isSigned = {
try {
rsmd.isSigned(i + 1)
} catch {
// Workaround for HIVE-14684:
case e: SQLException if
e.getMessage == "Method not supported" &&
rsmd.getClass.getName == "org.apache.hive.jdbc.HiveResultSetMetaData" => true
}
}
val nullable = rsmd.isNullable(i + 1) != ResultSetMetaData.columnNoNulls
val metadata = new MetadataBuilder()
.putString("name", columnName)
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