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START TRANSACTION()              SQL Commands              START TRANSACTION()

NAME
       START TRANSACTION - start a transaction block

SYNOPSIS
       START TRANSACTION [ transaction_mode [, ...] ]

       where transaction_mode is one of:

           ISOLATION LEVEL { SERIALIZABLE | REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED }
           READ WRITE | READ ONLY

DESCRIPTION
       This  command begins a new transaction block. If the isolation level or
       read/write mode is specified, the new transaction has those  character-
       istics,  as  if SET TRANSACTION [set_transaction(7)] was executed. This
       is the same as the BEGIN [begin(7)] command.

PARAMETERS
       Refer to SET TRANSACTION [set_transaction(7)] for  information  on  the
       meaning of the parameters to this statement.

COMPATIBILITY
       In  the  standard,  it  is  not necessary to issue START TRANSACTION to
       start a transaction block: any SQL command implicitly begins  a  block.
       PostgreSQL's  behavior can be seen as implicitly issuing a COMMIT after
       each command that does not follow START TRANSACTION (or BEGIN), and  it
       is  therefore  often  called ``autocommit''.  Other relational database
       systems might offer an autocommit feature as a convenience.

       The SQL standard requires commas between successive  transaction_modes,
       but  for historical reasons PostgreSQL allows the commas to be omitted.

       See also the compatibility section  of  SET  TRANSACTION  [set_transac-
       tion(7)].

SEE ALSO
       BEGIN [begin(7)], COMMIT [commit(l)], ROLLBACK [rollback(l)], SAVEPOINT
       [savepoint(l)], SET TRANSACTION [set_transaction(l)]

SQL - Language Statements         2009-12-09               START TRANSACTION()

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