[GitHub] spark pull request #15183: https://issues.apache.org/jira/browse/SPARK-17614...

GitHub user paulzwu opened a pull request: https://github.com/apache/spark/pull/15183 https://issues.apache.org/jira/browse/SPARK-17614 ## What changes were proposed in this pull request? Use JdbcDialect's getTableExistsQuery rather than the hard-coded "SELE

[GitHub] spark pull request #15184: Branch 2.0

GitHub user paulzwu opened a pull request: https://github.com/apache/spark/pull/15184 Branch 2.0 ## What changes were proposed in this pull request? Need to override the getTableExistsQuery for CassandraDialect ## How was this patch tested