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[SPARK-1995][SQL] system function upper and lower can be supported
I don't know whether it's time to implement system function about string operation in spark sql now. Author: egraldlo <egraldlo@gmail.com> Closes #936 from egraldlo/stringoperator and squashes the following commits: 3c6c60a [egraldlo] Add UPPER, LOWER, MAX and MIN into hive parser ea76d0a [egraldlo] modify the formatting issues b49f25e [egraldlo] modify the formatting issues 1f0bbb5 [egraldlo] system function upper and lower supported 13d3267 [egraldlo] system function upper and lower supported
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala 4 additions, 0 deletions.../main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala 32 additions, 0 deletions...che/spark/sql/catalyst/expressions/stringOperations.scala
- sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala 23 additions, 0 deletions...e/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
- sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala 11 additions, 1 deletion...ive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
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