Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19192#discussion_r138228826
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala ---
@@ -100,7 +100,7 @@ abstract class JdbcDialect extends Serializable {
* @return The SQL query to use for checking the table.
*/
def getTableExistsQuery(table: String): String = {
- s"SELECT * FROM $table WHERE 1=0"
+ s"SELECT * FROM ${quoteIdentifier(table)} WHERE 1=0"
--- End diff --
This is a behavior change. After we quote the names, the table names become
case sensitive in most RDBMS. We need at least a JDBC option to control it.
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