<?php

/**

 * @addtogroup database

 * @{

 */

/**

 * @file

 * Query code for MySQL embedded database engine.

 */

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 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;

  }

}

class TruncateQuery_mysql extends TruncateQuery { }

/**

 * @} End of "addtogroup database".

 */