sesam_settransaction
(No version information available, might be only in CVS)
sesam_settransaction — Set SESAM transaction parameters
说明
Overrides the default values for the isolation level and read-only transaction parameters (which are set in the SESAM configuration file), in order to optimize subsequent queries and guarantee database consistency. The overridden values are used for the next transaction only. See the SESAM handbook for detailed explanation of the semantics.
This function can only be called before starting a transaction, not after the transaction has been started already.
The values set by sesam_settransaction() will override the default setting specified in the SESAM configuration file.
参数
- isolation_level
-
Valid values for isolation_level parameter Value Constant Meaning 1 SESAM_TXISOL_READ_UNCOMMITTED Read Uncommitted 2 SESAM_TXISOL_READ_COMMITTED Read Committed 3 SESAM_TXISOL_REPEATABLE_READ Repeatable Read 4 SESAM_TXISOL_SERIALIZABLE Serializable - read_only
-
Valid values for read_only parameter Value Constant Meaning 0 SESAM_TXREAD_READWRITE Read/Write 1 SESAM_TXREAD_READONLY Read-Only
返回值
Returns TRUE if the values are valid, and the settransaction operation was successful, FALSE otherwise.
范例
Example#1 Setting SESAM transaction parameters
<?php
sesam_settransaction (SESAM_TXISOL_REPEATABLE_READ,
SESAM_TXREAD_READONLY);
?>
