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95 lines
3.8 KiB
SQL
95 lines
3.8 KiB
SQL
-- Tags: no-ordinary-database
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CREATE TABLE landing (n Int64) engine=MergeTree order by n;
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CREATE TABLE target (n Int64) engine=MergeTree order by n;
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CREATE MATERIALIZED VIEW landing_to_target TO target AS
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SELECT n + throwIf(n == 3333)
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FROM landing;
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INSERT INTO landing SELECT * FROM numbers(10000); -- { serverError 395 }
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SELECT 'no_transaction_landing', count() FROM landing;
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SELECT 'no_transaction_target', count() FROM target;
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TRUNCATE TABLE landing;
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TRUNCATE TABLE target;
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BEGIN TRANSACTION;
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INSERT INTO landing SELECT * FROM numbers(10000); -- { serverError 395 }
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ROLLBACK;
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SELECT 'after_transaction_landing', count() FROM landing;
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SELECT 'after_transaction_target', count() FROM target;
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-- Same but using implicit_transaction
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INSERT INTO landing SETTINGS implicit_transaction=True SELECT * FROM numbers(10000); -- { serverError 395 }
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SELECT 'after_implicit_txn_in_query_settings_landing', count() FROM landing;
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SELECT 'after_implicit_txn_in_query_settings_target', count() FROM target;
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-- Same but using implicit_transaction in a session
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SET implicit_transaction=True;
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INSERT INTO landing SELECT * FROM numbers(10000); -- { serverError 395 }
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SET implicit_transaction=False;
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SELECT 'after_implicit_txn_in_session_landing', count() FROM landing;
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SELECT 'after_implicit_txn_in_session_target', count() FROM target;
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-- Reading from incompatible sources with implicit_transaction works the same way as with normal transactions:
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-- Currently reading from system tables inside a transaction is Not implemented:
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SELECT name, value, changed FROM system.settings where name = 'implicit_transaction' SETTINGS implicit_transaction=True; -- { serverError 48 }
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-- Verify that you don't have to manually close transactions with implicit_transaction
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SET implicit_transaction=True;
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SELECT throwIf(number == 0) FROM numbers(100); -- { serverError 395 }
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SELECT throwIf(number == 0) FROM numbers(100); -- { serverError 395 }
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SELECT throwIf(number == 0) FROM numbers(100); -- { serverError 395 }
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SELECT throwIf(number == 0) FROM numbers(100); -- { serverError 395 }
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SET implicit_transaction=False;
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-- implicit_transaction is ignored when inside a transaction (no recursive transaction error)
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BEGIN TRANSACTION;
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SELECT 'inside_txn_and_implicit', 1 SETTINGS implicit_transaction=True;
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SELECT throwIf(number == 0) FROM numbers(100) SETTINGS implicit_transaction=True; -- { serverError 395 }
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ROLLBACK;
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SELECT 'inside_txn_and_implicit', 1 SETTINGS implicit_transaction=True;
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-- You can work with transactions even if `implicit_transaction=True` is set
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SET implicit_transaction=True;
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BEGIN TRANSACTION;
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INSERT INTO target SELECT * FROM numbers(10000);
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SELECT 'in_transaction', count() FROM target;
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ROLLBACK;
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SELECT 'out_transaction', count() FROM target;
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SET implicit_transaction=False;
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-- Verify that the transaction_id column is populated correctly
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SELECT 'Looking_at_transaction_id_True' FORMAT Null SETTINGS implicit_transaction=1;
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-- Verify that the transaction_id column is NOT populated without transaction
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SELECT 'Looking_at_transaction_id_False' FORMAT Null SETTINGS implicit_transaction=0;
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SYSTEM FLUSH LOGS;
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SELECT
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'implicit_True',
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count() as all,
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transaction_id = (0,0,'00000000-0000-0000-0000-000000000000') as is_empty
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FROM system.query_log
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WHERE
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current_database = currentDatabase() AND
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event_date >= yesterday() AND
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query LIKE '-- Verify that the transaction_id column is populated correctly%'
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GROUP BY transaction_id
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FORMAT JSONEachRow;
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SELECT
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'implicit_False',
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count() as all,
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transaction_id = (0,0,'00000000-0000-0000-0000-000000000000') as is_empty
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FROM system.query_log
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WHERE
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current_database = currentDatabase() AND
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event_date >= yesterday() AND
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query LIKE '-- Verify that the transaction_id column is NOT populated without transaction%'
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GROUP BY transaction_id
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FORMAT JSONEachRow;
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