fix(mysql): support SHOW TABLES IN <schema> parsing#7537
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georgesittas merged 1 commit intotobymao:mainfrom Apr 22, 2026
Merged
fix(mysql): support SHOW TABLES IN <schema> parsing#7537georgesittas merged 1 commit intotobymao:mainfrom
georgesittas merged 1 commit intotobymao:mainfrom
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MariaDB and MySQL both accept `SHOW TABLES IN schema` as a synonym for `SHOW TABLES FROM schema`, but the parser only handled `FROM`. The `IN` token was being consumed as a potential log-file specifier (for BINLOG/RELAYLOG EVENTS) and then lost, leaving the schema identifier unconsumed and raising a ParseError. Save the parser index before consuming `IN`; if no string literal follows, retreat so the schema-name branch can match `IN` as an alias for `FROM`. BINLOG/RELAYLOG EVENTS behavior is preserved by the existing test_show_events coverage.
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Summary
MariaDB and MySQL both accept
SHOW TABLES IN schemaas a synonym forSHOW TABLES FROM schema, but the parser only handledFROM. This PR teaches_parse_show_mysqlto also acceptINas a schema-name alias without breaking the existing log-file handling forSHOW BINLOG EVENTS IN 'logfile'.Before
After
Why it broke
The
INtoken was being consumed unconditionally as a potential log-file specifier. When followed by an identifier (e.g.test) rather than a string literal,_parse_string()returnedNonebutINwas already consumed — leaving the schema identifier as an unexpected token.Fix
Save the parser index before consuming
IN; if no string literal follows,_retreat(index)so the schema-name branch can matchINas an alias forFROM. BINLOG/RELAYLOG EVENTS behavior is preserved because those variants always have a string literal followingIN.Test plan
test_show_tablescoverSHOW TABLES IN testandSHOW FULL TABLES IN testround-tripstest_show_events(line 1175) still passes — confirmsSHOW BINLOG EVENTS IN 'log' FROM 1 LIMIT 2, 3regression guardtests/dialects/suite runs cleanly (no new failures vs. main)ruff check+ruff format --checkpass