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Fix ValueTracker skipping type evaluation for empty strings

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`ValueTracker.evaluate()` used `if not value` to skip NULL values, but
this also skipped empty strings (`""`), `0`, and other falsy values.
A CSV column containing only empty strings was incorrectly inferred as
INTEGER (the initial default) instead of TEXT.

Replace the falsy check with an explicit `if value is None` so that only
NULL is skipped and all other values — including `""` — are evaluated
against the type tests.
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Claude 2026-07-20 14:57:53 +00:00
commit cffe30fd2f
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2 changed files with 19 additions and 1 deletions
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sqlite_utils/utils.py
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@ -490,7 +490,7 @@ class ValueTracker:
return "text"
def evaluate(self, value: object) -> None:
if not value or not self.couldbe:
if value is None or not self.couldbe:
return
not_these: List[str] = []
for name, test in self.couldbe.items():