Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/15664#discussion_r94211157
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcRelationProvider.scala
---
@@ -57,26 +57,28 @@ class JdbcRelationProvider extends
CreatableRelationProvider
val table = jdbcOptions.table
val createTableOptions = jdbcOptions.createTableOptions
val isTruncate = jdbcOptions.isTruncate
+ val isCaseSensitive = sqlContext.conf.caseSensitiveAnalysis
val conn = JdbcUtils.createConnectionFactory(jdbcOptions)()
try {
val tableExists = JdbcUtils.tableExists(conn, url, table)
if (tableExists) {
+ val tableSchema = JdbcUtils.getSchemaOption(conn, url, table)
mode match {
case SaveMode.Overwrite =>
if (isTruncate && isCascadingTruncateTable(url) ==
Some(false)) {
// In this case, we should truncate table and then load.
truncateTable(conn, table)
- saveTable(df, url, table, jdbcOptions)
+ saveTable(df, url, table, tableSchema.get, isCaseSensitive,
jdbcOptions)
--- End diff --
Sure! Now, there is no pre-check.
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