[jira] [Created] (CALCITE-6129) SqlToRelConverter throws an exception when converting a NULL SqlLiteral

["Mihai Budiu (Jira)" <ji...@apache.org>]

Mihai Budiu created CALCITE-6129:
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             Summary: SqlToRelConverter throws an exception when converting a NULL SqlLiteral
                 Key: CALCITE-6129
                 URL: https://issues.apache.org/jira/browse/CALCITE-6129
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.36.0
            Reporter: Mihai Budiu


The problem is in SqlNodeToRexConverterImpl.convertLiteral. This function attempts to handle NULL literals differently from all other literals:

{code:java}
    final RexBuilder rexBuilder = cx.getRexBuilder();
    if (literal.getValue() == null) {
      RelDataType type = cx.getValidator().getValidatedNodeType(literal);
      return rexBuilder.makeNullLiteral(type);
    }

    switch (literal.getTypeName()) {
    ...
{code}

However, such a literal does *not* have a validated data type, to getValidatedNodeType will throw Util.needToImplement.

The solution would be to handle NULL literals like all other literals and create a literal with a NULL type.




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