moodle_read_slave_trait.php File Reference

Trait that adds read-only slave connection capability. More...

Functions
	can_use_readonly (int $type, string $sql)
	Check if The query qualifies for readonly connection execution Logging queries are exempt, those are write operations that circumvent standard query_start/query_end paths.
	commit_delegated_transaction (moodle_transaction $transaction)
	Indicates delegated transaction finished successfully.
	connect ($dbhost, $dbuser, $dbpass, $dbname, $prefix, array $dboptions=null)
	Connect to db The connection parameters processor that sets up stage for master write and slave readonly handles.
	get_db_handle ()
	Gets db handle currently used with queries.
	perf_get_reads_slave ()
	Returns the number of reads done by the read only database.
	query_end ($result)
	This should be called immediately after each db query.
	query_start ($sql, ?array $params, $type, $extrainfo=null)
	Called before each db query.
	raw_connect (string $dbhost, string $dbuser, string $dbpass, string $dbname, $prefix, array $dboptions=null)
	Connect to db The real connection establisment, called from connect() and set_dbhwrite()
	select_db_handle (int $type, string $sql)
	Select appropriate db handle - readwrite or readonly.
	set_db_handle ($dbh)
	Sets db handle to be used with subsequent queries.
	start_delegated_transaction ()
	On DBs that support it, switch to transaction mode and begin a transaction.
	table_names (string $sql)
	Parse table names from query.
	want_read_slave ()
	Returns whether we want to connect to slave database for read queries.

Variables
resource	$dbhreadonly
	slave read only database handle
trait	moodle_read_slave_trait
	Trait to wrap connect() method of database driver classes that gives ability to use read only slave instances for SELECT queries.

Detailed Description

Trait that adds read-only slave connection capability.