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Database abstraction layer

Allow the use of different database servers using the same code base.

Code

includes/database/mysql/query.inc, line 17

<?php
public function execute() {

  // Confirm that the user did not try to specify an identical
  //  field and default field.
  if (array_intersect($this->insertFields, $this->defaultFields)) {
    throw new PDOException('You may not specify the same field to have a value and a schema-default value.');
  }

  if (count($this->insertFields) + count($this->defaultFields) == 0) {
    return NULL;
  }

  // Don't execute query without values.
  if (!isset($this->insertValues[0]) && count($this->insertFields) > 0) {
    return NULL;
  }

  $last_insert_id = 0;

  $max_placeholder = 0;
  $values = array();
  foreach ($this->insertValues as $insert_values) {
    foreach ($insert_values as $value) {
      $values[':db_insert_placeholder_' . $max_placeholder++] = $value;
    }
  }

  $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;
}
?>