class InsertQuery_mysql

class InsertQuery_mysql extends InsertQuery {
    public function execute() {
        if (!$this->preExecute()) {
            return NULL;
        }
        // If we're selecting from a SelectQuery, finish building the query and
        // pass it back, as any remaining options are irrelevant.
        if (empty($this->fromQuery)) {
            $max_placeholder = 0;
            $values = array();
            foreach ($this->insertValues as $insert_values) {
                foreach ($insert_values as $value) {
                    $values[':db_insert_placeholder_' . $max_placeholder++] = $value;
                }
            }
        }
        else {
            $values = $this->fromQuery
                ->getArguments();
        }
        $last_insert_id = $this->connection
            ->query((string) $this, $values, $this->queryOptions);
        // Re-initialize the values array so that we can re-use this query.
        $this->insertValues = array();
        return $last_insert_id;
    }
    public function __toString() {
        // Create a sanitized comment string to prepend to the query.
        $comments = $this->connection
            ->makeComment($this->comments);
        // Default fields are always placed first for consistency.
        $insert_fields = array_merge($this->defaultFields, $this->insertFields);
        if (method_exists($this->connection, 'escapeFields')) {
            $insert_fields = $this->connection
                ->escapeFields($insert_fields);
        }
        // If we're selecting from a SelectQuery, finish building the query and
        // pass it back, as any remaining options are irrelevant.
        if (!empty($this->fromQuery)) {
            $insert_fields_string = $insert_fields ? ' (' . implode(', ', $insert_fields) . ') ' : ' ';
            return $comments . 'INSERT INTO {' . $this->table . '}' . $insert_fields_string . $this->fromQuery;
        }
        $query = $comments . 'INSERT INTO {' . $this->table . '} (' . implode(', ', $insert_fields) . ') VALUES ';
        $max_placeholder = 0;
        $values = array();
        if (count($this->insertValues)) {
            foreach ($this->insertValues as $insert_values) {
                $placeholders = array();
                // Default fields aren't really placeholders, but this is the most convenient
                // way to handle them.
                $placeholders = array_pad($placeholders, count($this->defaultFields), 'default');
                $new_placeholder = $max_placeholder + count($insert_values);
                for ($i = $max_placeholder; $i < $new_placeholder; ++$i) {
                    $placeholders[] = ':db_insert_placeholder_' . $i;
                }
                $max_placeholder = $new_placeholder;
                $values[] = '(' . implode(', ', $placeholders) . ')';
            }
        }
        else {
            // If there are no values, then this is a default-only query. We still need to handle that.
            $placeholders = array_fill(0, count($this->defaultFields), 'default');
            $values[] = '(' . implode(', ', $placeholders) . ')';
        }
        $query .= implode(', ', $values);
        return $query;
    }

}