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https://issues.apache.org/jira/browse/SPARK-18123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15613453#comment-15613453
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Apache Spark commented on SPARK-18123:
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User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/15664
> org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils.saveTable the case
> senstivity issue
> ----------------------------------------------------------------------------------------------
>
> Key: SPARK-18123
> URL: https://issues.apache.org/jira/browse/SPARK-18123
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.1
> Reporter: Paul Wu
>
> Blindly quoting every field name for inserting is the issue (Line 110-119,
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala).
> /**
> * Returns a PreparedStatement that inserts a row into table via conn.
> */
> def insertStatement(conn: Connection, table: String, rddSchema: StructType,
> dialect: JdbcDialect)
> : PreparedStatement = {
> val columns = rddSchema.fields.map(x =>
> dialect.quoteIdentifier(x.name)).mkString(",")
> val placeholders = rddSchema.fields.map(_ => "?").mkString(",")
> val sql = s"INSERT INTO $table ($columns) VALUES ($placeholders)"
> conn.prepareStatement(sql)
> }
> This code causes the following issue (it does not happen to 1.6.x):
> I have issue with the saveTable method in Spark 2.0/2.0.1. I tried to save a
> dataset to Oracle database, but the fields must be uppercase to succeed. This
> is not an expected behavior: If only the table names were quoted, this
> utility should concern the case sensitivity. The code below throws the
> exception: Caused by: java.sql.SQLSyntaxErrorException: ORA-00904:
> "DATETIME_gmt": invalid identifier.
> String detailSQL ="select CAST('2016-09-25 17:00:00' AS TIMESTAMP)
> DATETIME_gmt, '1' NODEB";
> hc.sql("set spark.sql.caseSensitive=false");
> Dataset<Row> ds = hc.sql(detailSQL);
> ds.show();
>
> org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils.saveTable(ds, url,
> detailTable, p);
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