(PHP 5 >= 5.3.0, PHP 7)
Registers a PHP function for use as an SQL aggregate function
public bool SQLite3::createAggregate ( string $name, mixed $step_callback, mixed $final_callback [, int $argument_count = -1 ] )
Registers a PHP function or user-defined function for use as an SQL aggregate function for use within SQL statements.
Parameters:
name
Name of the SQL aggregate to be created or redefined.
step_callback
The name of a PHP function or user-defined function to apply as a callback for every item in the aggregate.
final_callback
The name of a PHP function or user-defined function to apply as a callback at the end of the aggregate data.
argument_count
The number of arguments that the SQL aggregate takes. If this parameter is negative, then the SQL aggregate may take any number of arguments.
Returns:
Returns TRUE upon successful creation of the aggregate, FALSE on failure.
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