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Implement the RLike & Like in catalyst
This PR includes: 1) Unify the unit test for expression evaluation 2) Add implementation of RLike & Like Author: Cheng Hao <hao.cheng@intel.com> Closes #224 from chenghao-intel/string_expression and squashes the following commits: 84f72e9 [Cheng Hao] fix bug in RLike/Like & Simplify the unit test aeeb1d7 [Cheng Hao] Simplify the implementation/unit test of RLike/Like 319edb7 [Cheng Hao] change to spark code style 91cfd33 [Cheng Hao] add implementation for rlike/like 2c8929e [Cheng Hao] Update the unit test for expression evaluation
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala 6 additions, 0 deletions.../main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala 9 additions, 1 deletion...ain/scala/org/apache/spark/sql/catalyst/dsl/package.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala 95 additions, 3 deletions...che/spark/sql/catalyst/expressions/stringOperations.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvaluationSuite.scala 83 additions, 0 deletions.../sql/catalyst/expressions/ExpressionEvaluationSuite.scala
- sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala 3 additions, 6 deletions...ive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
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