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Apache Spark commented on SPARK-32393: -------------------------------------- User 'maropu' has created a pull request for this issue: https://github.com/apache/spark/pull/29394 > PostgreSQL: blank-padded, fixed length character arrays are not supported > ------------------------------------------------------------------------- > > Key: SPARK-32393 > URL: https://issues.apache.org/jira/browse/SPARK-32393 > Project: Spark > Issue Type: Bug > Components: Input/Output > Affects Versions: 3.0.0 > Reporter: Jakub Korzeniowski > Priority: Minor > > Attempting to read the following table: > {code:java} > CREATE TABLE test_table ( > test_column char(64)[] > ) > {code} > results in the following exception: > {code:java} > java.sql.SQLException: Unsupported type ARRAY > at > org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.getCatalystType(JdbcUtils.scala:256) > at > org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.$anonfun$getSchema$1(JdbcUtils.scala:321) > at scala.Option.getOrElse(Option.scala:189) > at > org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.getSchema(JdbcUtils.scala:321) > at > org.apache.spark.sql.execution.datasources.jdbc.JDBCRDD$.resolveTable(JDBCRDD.scala:63) > at > org.apache.spark.sql.execution.datasources.jdbc.JDBCRelation$.getSchema(JDBCRelation.scala:226) > at > org.apache.spark.sql.execution.datasources.jdbc.JdbcRelationProvider.createRelation(JdbcRelationProvider.scala:35) > at > org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:339) > at > org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:279) > at > org.apache.spark.sql.DataFrameReader.$anonfun$load$2(DataFrameReader.scala:268) > at scala.Option.getOrElse(Option.scala:189) > at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:268) > at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:203) > {code} > non-array and varchar equivalents are fine. > > I've tracked it down to an internal function of the postgres dialect, that > accounts for the special 1-byte char, but doesn't deal with different length > ones, which postgres represents as bpchar: > [https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala#L60-L61]. > Relevant driver code can be found here: > [https://github.com/pgjdbc/pgjdbc/blob/master/pgjdbc/src/main/java/org/postgresql/jdbc/TypeInfoCache.java#L85-L87] > > I'll submit a fix shortly -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org