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. More...

	commit_delegated_transaction (moodle_transaction $transaction)
	Indicates delegated transaction finished successfully. More...

	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. More...

	get_db_handle ()
	Gets db handle currently used with queries. More...

	perf_get_reads_slave ()
	Returns the number of reads done by the read only database. More...

	query_start ($sql, array $params=null, $type, $extrainfo=null)
	Called before each db query. More...

	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() More...

	select_db_handle (int $type, string $sql)
	Select appropriate db handle - readwrite or readonly. More...

	set_db_handle ($dbh)
	Sets db handle to be used with subsequent queries. More...

	start_delegated_transaction ()
	On DBs that support it, switch to transaction mode and begin a transaction. More...

	table_names (string $sql)
	Parse table names from query. More...

	want_read_slave ()
	Returns whether we want to connect to slave database for read queries. More...

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. More...

Detailed Description

Trait that adds read-only slave connection capability.

Functions