danny0405 opened a new pull request #1490: [CALCITE-3392] Column expression in 
DDL should be validated before co…
URL: https://github.com/apache/calcite/pull/1490
 
 
   …nverting to RexNode
   
   * Add a new interface InitializerContext#validateExpression for column
   expression validation
   * Promote SqlToRelConverter#toRel not to do any projections conversion
   when there is no virtual columns
   * Add test cases in server module

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