SQL_QUERY_MUTATOR not called in SQLab with MUTATE_AFTER_SPLIT = True about superset HOT 1 OPEN

The SQL_QUERY_MUTATOR function is not called in SQLab when MUTATE_AFTER_SPLIT = True because the condition for calling the mutator function checks if the is_split parameter matches the MUTATE_AFTER_SPLIT configuration. If MUTATE_AFTER_SPLIT is set to True, the mutator function will only be called after the SQL is split into smaller queries. If the SQL is not split, the condition will not be met, and the mutator function will not be called.

Here is the relevant code snippet:

sql_mutator = config["SQL_QUERY_MUTATOR"]
if sql_mutator and (is_split == config["MUTATE_AFTER_SPLIT"]):
    return sql_mutator(
        sql_,
        security_manager=security_manager,
        database=self,
    )
return sql_

In this code, is_split must be True for the mutator to be called when MUTATE_AFTER_SPLIT is True. If is_split is False, the mutator will not be invoked ^[1][2].

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