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Update settings.md

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Denny Crane 2023-02-23 21:15:31 -04:00 committed by GitHub
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docs/en/operations/settings/settings.md
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@ -3948,3 +3948,42 @@ Default value: `0`.
:::note
Use this setting only for backward compatibility if your use cases depend on old syntax.
:::
## final {#final}
Automatically applies [FINAL](../../sql-reference/statements/select/from/#final-modifier) modifier to all tables in a query, to tables where [FINAL](../../sql-reference/statements/select/from/#final-modifier) is applicable, including joined tables and tables in sub-queries, and
distributed tables.
Example:
```sql
CREATE TABLE test
(
key Int64,
some String
)
ENGINE = ReplacingMergeTree
ORDER BY key;
INSERT INTO test FORMAT Values (1, 'first');
INSERT INTO test FORMAT Values (1, 'second');
SELECT * FROM test;
┌─key─┬─some───┐
│ 1 │ second │
└─────┴────────┘
┌─key─┬─some──┐
│ 1 │ first │
└─────┴───────┘
SELECT * FROM test SETTINGS final = 1;
┌─key─┬─some───┐
│ 1 │ second │
└─────┴────────┘
SET final = 1;
SELECT * FROM test;
┌─key─┬─some───┐
│ 1 │ second │
└─────┴────────┘
```