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CLAUDE TESTING: SQL query building does not handle empty lists #302

@yijint

Description

@yijint

This issue was detected by running schemathesis on a Claude-generated API.

SQL Syntax Errors (~5-10% of errors, ~11-22 failures):

  • Empty lists passed to SQL IN clauses generate invalid SQL: "WHERE id IN ()"
  • Example: GET /api/annot/imageset/uuid/ fails with "OperationalError: near ')': syntax error" when annotations have no associated imagesets
  • Root cause: SQL query building doesn't handle empty lists

Example:

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