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These settings are available in system.settings and are autogenerated from source.

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create_if_not_exists

Enable IF NOT EXISTS for CREATE statement by default. If either this setting or IF NOT EXISTS is specified and a table with the provided name already exists, no exception will be thrown.

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create_index_ignore_unique

Ignore UNIQUE keyword in CREATE UNIQUE INDEX. Made for SQL compatibility tests.

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create_replicated_merge_tree_fault_injection_probability

The probability of a fault injection during table creation after creating metadata in ZooKeeper

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create_table_empty_primary_key_by_default

Allow to create *MergeTree tables with empty primary key when ORDER BY and PRIMARY KEY not specified
Last modified on July 22, 2026