public function Select::preExecute in Drupal driver for SQL Server and SQL Azure 8.2

Same name and namespace in other branches

1. 8 drivers/lib/Drupal/Driver/Database/sqlsrv/Select.php \Drupal\Driver\Database\sqlsrv\Select::preExecute()
2. 3.0.x drivers/lib/Drupal/Driver/Database/sqlsrv/Select.php \Drupal\Driver\Database\sqlsrv\Select::preExecute()

Override for SelectQuery::preExecute().

Ensure that all the fields in ORDER BY and GROUP BY are part of the main query.

Overrides Select::preExecute

File

drivers/lib/Drupal/Driver/Database/sqlsrv/Select.php, line 56

Definition of Drupal\Driver\Database\sqlsrv\Select

Class

Select

Namespace

Drupal\Driver\Database\sqlsrv

Code

public function preExecute(DatabaseSelectInterface $query = null) {

  // If no query object is passed in, use $this.
  if (!isset($query)) {
    $query = $this;
  }

  // Only execute this once.
  if ($this
    ->isPrepared()) {
    return true;
  }

  // Execute standard pre-execution first.
  parent::preExecute($query);
  if ($this->distinct || $this->group) {

    // When the query is DISTINCT or contains GROUP BY fields, all the fields
    // in the GROUP BY and ORDER BY clauses must appear in the returned
    // columns.
    $columns = $this->order + array_flip($this->group);
    $counter = 0;
    foreach ($columns as $field => $dummy) {
      $found = false;
      foreach ($this->fields as $f) {
        if (!isset($f['table']) || !isset($f['field'])) {
          continue;
        }
        $alias = "{$f['table']}.{$f['field']}";
        if ($alias == $field) {
          $found = true;
          break;
        }
      }
      if (!isset($this->fields[$field]) && !isset($this->expressions[$field]) && !$found) {
        $alias = '_field_' . $counter++;
        $this
          ->addExpression($field, $alias, [], false, false);
        $this->queryOptions['sqlsrv_drop_columns'][] = $alias;
      }
    }

    // The other way round is also true, if using aggregates, all the fields in the SELECT
    // must be present in the GROUP BY.
    if (!empty($this->group)) {
      foreach ($this->fields as $field) {
        $spec = $field['table'] . '.' . $field['field'];
        $alias = $field['alias'];
        if (!isset($this->group[$spec]) && !isset($this->group[$alias])) {
          $this->group[$spec] = $spec;
        }
      }
    }

    // More over, GROUP BY columns cannot use aliases, so expand them to
    // their full expressions.
    foreach ($this->group as $key => &$group_field) {

      // Expand an alias on a field.
      if (isset($this->fields[$group_field])) {
        $field = $this->fields[$group_field];
        $group_field = (isset($field['table']) ? $this->connection
          ->escapeTable($field['table']) . '.' : '') . $this->connection
          ->escapeField($field['field']);
      }
      elseif (isset($this->expressions[$group_field])) {
        $expression = $this->expressions[$group_field];
        $group_field = $expression['expression'];

        // If the expression has arguments, we now
        // have duplicate placeholders. Run as insecure.
        if (is_array($expression['arguments'])) {
          $this->queryOptions['insecure'] = true;
        }
      }
    }
  }

  // Verify type bindings in the conditions, and throw the Exception
  // now to prevent a bug in MSSQLPDO where transactions are f**** UP
  // when the driver throws a PDOException().
  // @see https://github.com/Azure/msphpsql/issues/50
  // TODO: Remove when the issue is fixed in the PDO driver.

  //if (DatabaseUtils::GetConfigBoolean('MSSQL_VERIFY_NUMERIC_BINDINGS')) {

  //  foreach($this->where->conditions() as $condition) {
  //    if (!isset($condition['field']) || !is_string($condition['field'])) {
  //      continue;
  //    }
  //    // Make sure we have a valid $table.$field format.
  //    $parts = explode('.', $condition['field']);
  //    if (count($parts) !== 2) {
  //      continue;
  //    }
  //    list($table, $field_alias) = $parts;
  //    // Fin the real field name if this was an alias.
  //    $fields = $this->getFields();
  //    $field = $field_alias;
  //    if (isset($fields[$field_alias])) {
  //      $field = $fields[$field_alias]['field'];
  //    }
  //    // Get the real table name.
  //    $tables = $this->getTables();
  //    if (!isset($tables[$table])) {
  //      continue;
  //    }
  //    $real_table = $tables[$table]['table'];
  //    /** @var DatabaseSchema_sqlsrv **/
  //    $schema = $this->connection->schema();
  //    $spec = $schema->queryColumnInformation($real_table);
  //    $col_spec = $spec['columns'][$field];
  //    $values = $condition['value'];
  //    if (!is_array($values)) {
  //      $values = array($values);
  //    }
  //    foreach($values as $value) {
  //      if (!is_numeric($value) && !is_bool($value)) {
  //        if (in_array($col_spec['type'], array('int', 'bigint'))) {
  //          // This is anyways going to throw an exception when running the query against the PDO driver.
  //          throw new \PDOException('Invalid type binding!');
  //        }
  //      }
  //    }
  //  }

  //}
  return $this->prepared;
}