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[SPARK-4825] [SQL] CTAS fails to resolve when created using saveAsTable
Fix bug when query like: ``` test("save join to table") { val testData = sparkContext.parallelize(1 to 10).map(i => TestData(i, i.toString)) sql("CREATE TABLE test1 (key INT, value STRING)") testData.insertInto("test1") sql("CREATE TABLE test2 (key INT, value STRING)") testData.insertInto("test2") testData.insertInto("test2") sql("SELECT COUNT(a.value) FROM test1 a JOIN test2 b ON a.key = b.key").saveAsTable("test") checkAnswer( table("test"), sql("SELECT COUNT(a.value) FROM test1 a JOIN test2 b ON a.key = b.key").collect().toSeq) } ``` Author: Cheng Hao <hao.cheng@intel.com> Closes #3673 from chenghao-intel/spark_4825 and squashes the following commits: e8cbd56 [Cheng Hao] alternate the pattern matching order for logical plan:CTAS e004895 [Cheng Hao] fix bug (cherry picked from commit 0abbff2) Signed-off-by: Michael Armbrust <michael@databricks.com>
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