Validate host in SQLAlchemy URL helper - #621
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wendigo
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Jul 18, 2026
trino.sqlalchemy.URL() built the connection string by concatenation and never validated the host argument. Passing a value that carries a scheme, port, path, or credentials (e.g. "https://example.com") produced a malformed URL that SQLAlchemy rejected with an opaque error: ValueError: invalid literal for int() with base 10: '' Reject such a host up front with a clear ArgumentError that names the offending value and shows the expected form.
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Description
trino.sqlalchemy.URL() built the connection string by concatenation and never validated the host argument. Passing a value that carries a scheme, port, path, or credentials (e.g. "https://example.com") produced a malformed URL that SQLAlchemy rejected with an opaque error:
Reject such a host up front with a clear ArgumentError that names the offending value and shows the expected form.
Non-technical explanation
Validate host in SQLAlchemy URL helper. Fixes #579
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