Description
bool
sesam_settransaction ( int isolation_level, int read_only)
Returns: TRUE if the values are valid, and the
settransaction() operation was successful,
FALSE otherwise_
sesam_settransaction() 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_
sesam_settransaction() can only be called
before starting a transaction, not after the transaction has been
started already_
To simplify the use in php scripts, the following constants have
been predefined in php (see SESAM handbook for detailed
explanation of the semantics):
Tabla 1_
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 |
Tabla 2_
Valid values for "Read_Only" parameter
| Value | Constant | Meaning |
|---|
| 0 | SESAM_TXREAD_READWRITE | Read/Write |
| 1 | SESAM_TXREAD_READONLY | Read_Only |
The values set by sesam_settransaction() will
override the default setting specified in the SESAM configuration file_
Ejemplo 1_ Setting SESAM transaction parameters <?php
sesam_settransaction (SESAM_TXISOL_REPEATABLE_READ,
SESAM_TXREAD_READONLY);
?> |
|
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