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scylladb/cql3/statements
Dawid Mędrek c9735a6015 cdc: Forbid altering columns of inactive CDC log table
When CDC becomes disabled on the base table, the CDC log table
still exsits (cf. scylladb/scylladb@adda43edc7).
If it continues to exist up to the point when CDC is re-enabled
on the base table, no new log table will be created -- instead,
the old olg table will be *re-attached*.

Since we want to avoid situations when the definition of the log
table has become misaligned with the definition of the base table
due to actions of the user, we forbid modifying the set of columns
or renaming them in CDC log tables, even when they're inactive.

Validation tests are provided.

(cherry picked from commit 59800b1d66)
2025-07-21 11:43:14 +00:00
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