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fix: avoid scribbling on (reused) bind param #365

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merged 2 commits into from Oct 26, 2021
Merged

fix: avoid scribbling on (reused) bind param #365

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fix: avoid scribbling on (reused) bind param
tseaver Oct 26, 2021
c5bcad3
Merge branch 'main' into 357-dont-tase-me-bro
gcf-merge-on-green[bot] Oct 26, 2021
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6 changes: 6 additions & 0 deletions sqlalchemy_bigquery/base.py
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Expand Up @@ -471,8 +471,14 @@ def visit_bindparam(
# The NullType/known-type check has to do with some extreme
# edge cases having to do with empty in-lists that get special
# hijinks from SQLAlchemy that we don't want to disturb. :)
#
# Note that we do *not* want to overwrite the "real" bindparam
# here, because then we can't do a recompile later (e.g., first
# print the statment, then execute it). See issue #357.
#
if getattr(bindparam, "expand_op", None) is not None:
assert bindparam.expand_op.__name__.endswith("in_op") # in in
bindparam = bindparam._clone(maintain_key=True)
bindparam.expanding = False
unnest = True

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