Set Transaction Statement; Syntax Description Of Set Transaction - HP Neoview SQL Reference Manual

SET TRANSACTION Statement

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"Syntax Description of SET TRANSACTION"

• "Considerations for SET TRANSACTION"
• "Example of SET TRANSACTION"
The SET TRANSACTION statement sets attributes for transactions. It stays in effect until the
end of the session or until the next SET TRANSACTION statement, whichever comes first.
Therefore, the SET TRANSACTION statement can set the attributes of all subsequent transactions
in the session. SET TRANSACTION statements are not cumulative; each SET TRANSACTION
statement erases all the settings specified by previous SET TRANSACTION statements. If you
want to set multiple transactions attributes, they must all be specified in a single SET
TRANSACTION statement. To reset all transaction attributes to their default values, simply use
a SET TRANSACTION attribute to set a single attribute to its default value.
SET TRANSACTION transaction-mode [,transaction-mode]...
transaction-mode is:
isolation-level
| access-mode
| diagnostics-size
| autocommit-option
| norollback-option
| autoabort-interval
isolation-level is:
ISOLATION LEVEL access-option
access-option is:
READ UNCOMMITTED
| READ COMMITED
| SERIALIZABLE
| REPEATABLE READ
access-mode is:
READ ONLY | READ WRITE
diagnostics-size is:
DIAGNOSTICS SIZE number-of-conditions
autocommit-option is:
AUTOCOMMIT {ON | OFF}
norollback-option is:
NO ROLLBACK {ON | OFF}
autoabort-interval is:
AUTOABORT [ timeout | 0 | RESET]
timeout is:
integer {HOURS[S] | MINUTE[S] | SECOND[S]}
Syntax Description of SET TRANSACTION
transaction mode
specifies the attributes that you can set. You cannot specify any of the options—isolation
level, access mode, size of the diagnostics area, or autocommit—more than once within one
SET TRANSACTION statement. You cannot use the AUTOCOMMIT option with any other
option.
isolation-level
specifies the level of data consistency defined for the transaction and the degree of
concurrency the transaction has with other transactions that use the same data. The default
isolation level is READ COMMITTED.
166 SQL Statements