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filter is not described

meta_query_find_compatible_table_alias filter-hook . WP 4.1.0

Filters the table alias identified as compatible with the current clause.

Usage

add_filter( 'meta_query_find_compatible_table_alias', 'filter_function_name_2057', 10, 4 );
function filter_function_name_2057( $alias, $clause, $parent_query, $this ){
	// filter...

	return $alias;
}
$alias(string/true/false)
Table alias, or false if none was found.
$clause(array)
First-order query clause.
$parent_query(array)
Parent of $clause.
$this(object)
WP_Meta_Query object.

Where the hook is called

WP_Meta_Query::find_compatible_table_alias()
wp-includes/class-wp-meta-query.php 713
return apply_filters( 'meta_query_find_compatible_table_alias', $alias, $clause, $parent_query, $this ) ;

Where the hook is used (in WP core)

Does not used.