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@ -214,3 +214,33 @@ SELECT 'hello' || 'quote''s everywh''ere';
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(string)
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(string)
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(other_op)
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(other_op)
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(string)))))
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(string)))))
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================================================================================
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is null, isnull, is not null, notnull
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================================================================================
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SELECT
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foo is null,
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foo is not null,
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foo isnull,
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foo notnull;
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--------------------------------------------------------------------------------
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(source_file
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(select_statement
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(select_item
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(op_expression
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(identifier)
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(comparison_null)))
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(select_item
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(op_expression
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(identifier)
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(comparison_null)))
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(select_item
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(op_expression
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(identifier)
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(comparison_null)))
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(select_item
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(op_expression
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(identifier)
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(comparison_null)))))
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