jinxing64 commented on issue #1448: [CALCITE-3332] Query failed with 
AssertionError: cannot cast null as class java.math.BigDecima
URL: https://github.com/apache/calcite/pull/1448#issuecomment-529846512
 
 
   In current code of `SqlOperatorBinding#isOperandNull`, the doc for param of 
allowCast is like below
   ```
   * @param allowCast whether to regard CAST(constant) as a constant
   ```
   Shall we update it and update 'constant' with 'null' in this PR ? That will 
be more clear.
   I'm not sure if this PR could include such change.

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