1START TRANSACTION(7)     PostgreSQL 12.6 Documentation    START TRANSACTION(7)
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NAME

6       START_TRANSACTION - start a transaction block
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SYNOPSIS

9       START TRANSACTION [ transaction_mode [, ...] ]
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11       where transaction_mode is one of:
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13           ISOLATION LEVEL { SERIALIZABLE | REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED }
14           READ WRITE | READ ONLY
15           [ NOT ] DEFERRABLE
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DESCRIPTION

18       This command begins a new transaction block. If the isolation level,
19       read/write mode, or deferrable mode is specified, the new transaction
20       has those characteristics, as if SET TRANSACTION (SET_TRANSACTION(7))
21       was executed. This is the same as the BEGIN(7) command.
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PARAMETERS

24       Refer to SET TRANSACTION (SET_TRANSACTION(7)) for information on the
25       meaning of the parameters to this statement.
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COMPATIBILITY

28       In the standard, it is not necessary to issue START TRANSACTION to
29       start a transaction block: any SQL command implicitly begins a block.
30       PostgreSQL's behavior can be seen as implicitly issuing a COMMIT after
31       each command that does not follow START TRANSACTION (or BEGIN), and it
32       is therefore often called “autocommit”. Other relational database
33       systems might offer an autocommit feature as a convenience.
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35       The DEFERRABLE transaction_mode is a PostgreSQL language extension.
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37       The SQL standard requires commas between successive transaction_modes,
38       but for historical reasons PostgreSQL allows the commas to be omitted.
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40       See also the compatibility section of SET TRANSACTION
41       (SET_TRANSACTION(7)).
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SEE ALSO

44       BEGIN(7), COMMIT(7), ROLLBACK(7), SAVEPOINT(7), SET TRANSACTION
45       (SET_TRANSACTION(7))
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49PostgreSQL 12.6                      2021                 START TRANSACTION(7)
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