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PostgreSQL: Support PRIMARY KEY/UNIQUE USING INDEX #2213

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PostgreSQL: Support PRIMARY KEY/UNIQUE USING INDEX #2213

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@guan404ming guan404ming commented Feb 9, 2026

Why

PostgreSQL allows promoting an existing unique index to a PRIMARY KEY or UNIQUE table constraint via ALTER TABLE, which was
not supported by the parser.

How

  • Add ConstraintUsingIndex variant to TableConstraint with display, span, and serialization support
  • Parse USING INDEX index_name after PRIMARY KEY or UNIQUE keywords in constraint parsing
  • Add tests for named/unnamed constraints and deferrable characteristics

@guan404ming guan404ming marked this pull request as ready for review February 9, 2026 09:54
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PostgreSQL: Support PRIMARY KEY/UNIQUE USING INDEX
91a677f 
Signed-off-by: Guan-Ming Chiu <guanmingchiu@gmail.com>
@guan404ming guan404ming force-pushed the pg-primary-key-using-index branch from 3cdaa92 to 91a677f Compare February 12, 2026 01:34
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