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Skip type detection when CSV insert created no table

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Closes #702.

A CSV that's only a header row leaves insert_all with no rows, so no
table gets created. The follow-up transform(types=tracker.types) hit
the 'Cannot transform a table that doesn't exist yet' assertion. Guard
both insert paths on the table actually existing.

Signed-off-by: Charlie Tonneslan <cst0520@gmail.com>
This commit is contained in:
Charlie Tonneslan 2026-05-18 10:08:37 -04:00
commit 0c5e9eb104
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2 changed files with 19 additions and 2 deletions
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6
sqlite_utils/cli.py
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@ -1175,7 +1175,9 @@ def insert_upsert_implementation(
)
else:
raise
if tracker is not None:
if tracker is not None and db.table(table).exists():
# A header-only CSV creates no table, so there is nothing to
# retype - skip the transform to avoid the assertion in it.
db.table(table).transform(types=tracker.types)
# Clean up open file-like objects
@ -2032,7 +2034,7 @@ def memory(
rows = (_flatten(row) for row in rows)
db.table(file_table).insert_all(rows, alter=True)
if tracker is not None:
if tracker is not None and db.table(file_table).exists():
db.table(file_table).transform(types=tracker.types)
# Add convenient t / t1 / t2 views
view_names = ["t{}".format(i + 1)]