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https://issues.apache.org/jira/browse/SPARK-9734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-9734:
-----------------------------
Assignee: Davies Liu
> java.lang.IllegalArgumentException: Don't know how to save
> StructField(sal,DecimalType(7,2),true) to JDBC
> ---------------------------------------------------------------------------------------------------------
>
> Key: SPARK-9734
> URL: https://issues.apache.org/jira/browse/SPARK-9734
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.4.1
> Reporter: Greg Rahn
> Assignee: Davies Liu
> Fix For: 1.5.0
>
>
> When using a basic example of reading the EMP table from Redshift via
> spark-redshift, and writing the data back to Redshift, Spark fails with the
> below error, related to Numeric/Decimal data types.
> Redshift table:
> {code}
> testdb=# \d emp
> Table "public.emp"
> Column | Type | Modifiers
> ----------+-----------------------+-----------
> empno | integer |
> ename | character varying(10) |
> job | character varying(9) |
> mgr | integer |
> hiredate | date |
> sal | numeric(7,2) |
> comm | numeric(7,2) |
> deptno | integer |
> testdb=# select * from emp;
> empno | ename | job | mgr | hiredate | sal | comm | deptno
> -------+--------+-----------+------+------------+---------+---------+--------
> 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20
> 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30
> 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30
> 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10
> 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10
> 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20
> 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20
> 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30
> 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20
> 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30
> 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20
> 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30
> 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30
> 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10
> (14 rows)
> {code}
> Spark Code:
> {code}
> val url = "jdbc:redshift://rshost:5439/testdb?user=xxx&password=xxx"
> val driver = "com.amazon.redshift.jdbc41.Driver"
> val t =
> sqlContext.read.format("com.databricks.spark.redshift").option("jdbcdriver",
> driver).option("url", url).option("dbtable", "emp").option("tempdir",
> "s3n://spark-temp-dir").load()
> t.registerTempTable("SparkTempTable")
> val t1 = sqlContext.sql("select * from SparkTempTable")
> t1.write.format("com.databricks.spark.redshift").option("driver",
> driver).option("url", url).option("dbtable", "t1").option("tempdir",
> "s3n://spark-temp-dir").option("avrocompression",
> "snappy").mode("error").save()
> {code}
> Error Stack:
> {code}
> java.lang.IllegalArgumentException: Don't know how to save
> StructField(sal,DecimalType(7,2),true) to JDBC
> at
> org.apache.spark.sql.jdbc.package$JDBCWriteDetails$$anonfun$schemaString$1$$anonfun$2.apply(jdbc.scala:149)
> at
> org.apache.spark.sql.jdbc.package$JDBCWriteDetails$$anonfun$schemaString$1$$anonfun$2.apply(jdbc.scala:136)
> at scala.Option.getOrElse(Option.scala:120)
> at
> org.apache.spark.sql.jdbc.package$JDBCWriteDetails$$anonfun$schemaString$1.apply(jdbc.scala:135)
> at
> org.apache.spark.sql.jdbc.package$JDBCWriteDetails$$anonfun$schemaString$1.apply(jdbc.scala:132)
> at
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
> at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
> at
> org.apache.spark.sql.jdbc.package$JDBCWriteDetails$.schemaString(jdbc.scala:132)
> at
> org.apache.spark.sql.jdbc.JDBCWrapper.schemaString(RedshiftJDBCWrapper.scala:28)
> at
> com.databricks.spark.redshift.RedshiftWriter.createTableSql(RedshiftWriter.scala:39)
> at
> com.databricks.spark.redshift.RedshiftWriter.doRedshiftLoad(RedshiftWriter.scala:105)
> at
> com.databricks.spark.redshift.RedshiftWriter.saveToRedshift(RedshiftWriter.scala:145)
> at
> com.databricks.spark.redshift.DefaultSource.createRelation(DefaultSource.scala:92)
> at org.apache.spark.sql.sources.ResolvedDataSource$.apply(ddl.scala:309)
> at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:144)
> {code}
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