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Code Reference Classes BP_Recursive_Query BP_Recursive_Query::get_sql_for_query()

BP_Recursive_Query::get_sql_for_query( array $query, int $depth )

Generate SQL clauses for a single query array.

Description

If nested subqueries are found, this method recurses the tree to produce the properly nested SQL.

Subclasses generally do not need to call this method. It is invoked automatically from get_sql_clauses().

Parameters

$query

(Required) Query to parse.

$depth

(Optional) Number of tree levels deep we currently are. Used to calculate indentation.

Return

(array)

Source

File: bp-core/classes/class-bp-recursive-query.php

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protected function get_sql_for_query( $query, $depth = 0 ) {
    $sql_chunks = array(
        'join'  => array(),
        'where' => array(),
    );
 
    $sql = array(
        'join'  => '',
        'where' => '',
    );
 
    $indent = '';
    for ( $i = 0; $i < $depth; $i++ ) {
        $indent .= "\t";
    }
 
    foreach ( $query as $key => $clause ) {
        if ( 'relation' === $key ) {
            $relation = $query['relation'];
        } elseif ( is_array( $clause ) ) {
            // This is a first-order clause
            if ( $this->is_first_order_clause( $clause ) ) {
                $clause_sql = $this->get_sql_for_clause( $clause, $query );
 
                $where_count = count( $clause_sql['where'] );
                if ( ! $where_count ) {
                    $sql_chunks['where'][] = '';
                } elseif ( 1 === $where_count ) {
                    $sql_chunks['where'][] = $clause_sql['where'][0];
                } else {
                    $sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )';
                }
 
                $sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] );
            // This is a subquery
            } else {
                $clause_sql = $this->get_sql_for_query( $clause, $depth + 1 );
 
                $sql_chunks['where'][] = $clause_sql['where'];
                $sql_chunks['join'][]  = $clause_sql['join'];
            }
        }
    }
 
    // Filter empties
    $sql_chunks['join']  = array_filter( $sql_chunks['join'] );
    $sql_chunks['where'] = array_filter( $sql_chunks['where'] );
 
    if ( empty( $relation ) ) {
        $relation = 'AND';
    }
 
    if ( ! empty( $sql_chunks['join'] ) ) {
        $sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) );
    }
 
    if ( ! empty( $sql_chunks['where'] ) ) {
        $sql['where'] = '( ' . "\n\t" . $indent . implode( ' ' . "\n\t" . $indent . $relation . ' ' . "\n\t" . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')' . "\n";
    }
 
    return $sql;
}

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