Timo Walther created FLINK-8387:
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Summary: Do not allow filter(false)
Key: FLINK-8387
URL: https://issues.apache.org/jira/browse/FLINK-8387
Project: Flink
Issue Type: Improvement
Components: Table API & SQL
Reporter: Timo Walther
Assignee: Timo Walther
Code like the following looks correct but actually produces unintended side
effects:
{code}
left.join(right)
.where('a == 'd)
.select('a)
{code}
{{==}} is not converted into an expression but directly evaluated into an
boolean expression and implicitly converted into an {{false}} literal. Instead
of an exception this leads to an always rejecting table program. We should not
allow filters with {{false}} literals.
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