feat(parser): add support for ClickHouse [LEFT] ARRAY JOIN syntax - #2482
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manticore-projects merged 4 commits intoAug 18, 2026
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watashi-00
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watashi-00
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Summary
Implements support for ClickHouse
ARRAY JOINandLEFT ARRAY JOINclauses inSELECTstatements, enabling unnesting array columns into separate rows.Fixes #2468
Changes
JSqlParserCC.jjt): Added grammar support for[LEFT] ARRAY JOINand adjustedisAliasAhead()/isReservedKeywordSafeByFollower()to preventLEFT/ARRAYfrom being wrongly recognized as table aliases.Join.java): AddedisArray()/setArray()and updated join formatting.SelectTest.java): AddedtestClickHouseArrayJoin()with parse/deparse assertions and AST validation.README.mdunder supported extensions.Checklist
assertSqlCanBeParsedAndDeparsed()executed for new syntaxmvn checkstyle:checkpassed with 0 violationsupstream/master