Francesco Guardiani created FLINK-26053:
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Summary: Fix parser generator warnings
Key: FLINK-26053
URL: https://issues.apache.org/jira/browse/FLINK-26053
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Reporter: Francesco Guardiani
When building flink-sql-parser, the javacc logs a couple of warnings:
{code}
Warning: Choice conflict in [...] construct at line 2920, column 5.
Expansion nested within construct and expansion following construct
have common prefixes, one of which is: "PLAN"
Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict involving two expansions at
line 2930, column 9 and line 2932, column 9 respectively.
A common prefix is: "STATEMENT"
Consider using a lookahead of 2 for earlier expansion.
Warning: Choice conflict involving two expansions at
line 2952, column 9 and line 2954, column 9 respectively.
A common prefix is: "STATEMENT"
Consider using a lookahead of 2 for earlier expansion.
{code}
Took from
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=30871&view=logs&j=0c940707-2659-5648-cbe6-a1ad63045f0a&t=075c2716-8010-5565-fe08-3c4bb45824a4&l=3911
We should investigate them, as they're often symptom of some bug in our parser
template, which might result in unexpected parsing errors.
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