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Query Builder Generates Invalid SQL For Empty In Filters

Passing an empty array to an 'in' filter in the PostgREST query builder produces invalid SQL (`in ()`), causing syntax errors. This affects vault helpers in Supabase Studio.

highConfidence 85%PostgREST

Origin Analysis

The filter serialization logic does not handle empty arrays for the 'in' operator, directly interpolating the array into SQL parentheses without checking length.

Use `new Query().from('users', 'public').select().filter('id', 'in', []).toSql()`; observe generated SQL contains `in ()` which PostgreSQL rejects.

Fixing Code Block

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0x48 8D 3D 22 01 00 00 E80x91 FF 0A 63 2E 57 B8 04
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0xFF 15 40 20 60 00 48 890xC3 90 7A 01 4C 28 B1 56
0x0F 1F 44 00 00 55 48 890xE5 C3 18 6D 92 0B 33 A7

Edge Case Audit

This change alters semantics: previously an empty array caused a runtime error; now it silently returns no rows. Ensure no code depended on that error (unlikely). For tuple filters, use `(col1, col2) = ANY('{}'::record[])` or `false`. Keep a rollback point by tagging the version before merging; test with prepared statements and NULLs. In concurrent environments, always-false predicate may be optimized differently by the planner but is safe.