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Posted to commits@calcite.apache.org by GitBox <gi...@apache.org> on 2019/10/09 15:05:35 UTC

[GitHub] [calcite] leonardBang opened a new pull request #1491: [CALCITE-3368] Some problems simplifying ‘expression IS NULL’

leonardBang opened a new pull request #1491: [CALCITE-3368] Some problems simplifying ‘expression IS NULL’ 
URL: https://github.com/apache/calcite/pull/1491
 
 
   [CALCITE-3368] Some problems simplifying ‘expression IS NULL’ (Leonard Xu)
   
   Close apache/calcite#3368
   
   * Mark TIMES、PLUS、MINUS、PLUS_PREFIX、MINUS_PREFIX as unsafe operators
   * Add judgement for safe expression in both IsNull and IsNotNull 
   * Add related test cases in RexProgramTest 

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