Rick Hillegas created SPARK-11426:
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Summary: JDBCRDD should use JdbcDialect to probe for the existence
of a table
Key: SPARK-11426
URL: https://issues.apache.org/jira/browse/SPARK-11426
Project: Spark
Issue Type: Improvement
Affects Versions: 1.5.1
Reporter: Rick Hillegas
JdbcDialect.getTableExistsQuery() lets us specify which query to use in order
to probe for the existence of a table. Some JdbcDialects (Postgres and MySQL)
override the default query used for this purpose. Presumably, we should use
those preferred overrides every time that Spark probes for the existence of a
query.
However, JDBCRDD.resolveTable() has its own, hard-coded query which probes for
the existence of a table. We should make JDBCRDD.resolveTable() call
JdbcDialect.getTableExistsQuery() instead.
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