Add support for converting pyformat SQL to positional markers with bulk_parameters#812
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Co-authored-by: Mathias Fußenegger <mfussenegger@users.noreply.github.com>
bgunebakan
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Jun 15, 2026
Co-authored-by: Bilal Tonga <bilaltonga@gmail.com>
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Jun 16, 2026
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Summary of the changes / Why this is an improvement
Fixes a silent runtime error when
cursor.execute()is called withbulk_parametersand a SQL statement that uses%(name)s(pyformat) placeholders.When
bulk_parametersis passed alongside pyformat SQL, the driver was sending the raw%(name)smarkers verbatim to CrateDB, which rejected them with:SQLParseException[no viable alternative at input 'VALUES (%']The fix adds an elif branch in
execute()that rewrites the SQL template to $N positional markers before the request is sent.The bug was introduced indirectly by PR #810 which declared
paramstyle = "pyformat"for the driver. Before that change, SQLAlchemy generated?style SQL, so thebulk_parameterspath was never fed pyformat placeholders so the broken code path simply didn't exist.It fixes implementation in sqlalchemy-crate package crate/sqlalchemy-cratedb#266
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