Base Database API class.
This class provides a Backdrop-specific extension of the PDO database abstraction class in PHP. Every database driver implementation must provide a concrete implementation of it to support special handling required by that database.
Hierarchy
- class DatabaseConnection
Expanded class hierarchy of DatabaseConnection
See also
http://php.net/manual/book.pdo.php
Related topics
File
- core/
includes/ database/ database.inc, line 184 - Core systems for the database layer.
Members
Name | Modifiers | Type | Description |
---|---|---|---|
DatabaseConnection:: |
function | ||
DatabaseConnection:: |
public | function | Returns the version of the database server. |
DatabaseConnection:: |
public | function | Checks whether utf8mb4 support is available on the current database system. |
DatabaseConnection:: |
public | function | Checks whether utf8mb4 support is currently active. |
DatabaseConnection:: |
public | function | Prepares and returns an UPDATE query object. |
DatabaseConnection:: |
public | function | Prepares and returns a TRUNCATE query object. |
DatabaseConnection:: |
public | function | Determines current transaction depth. |
DatabaseConnection:: |
public | function | Find the prefix for a table. |
DatabaseConnection:: |
public | function | Determines if this driver supports transactions. |
DatabaseConnection:: |
public | function | Determines if this driver supports transactional DDL. |
DatabaseConnection:: |
public | function | Returns a new DatabaseTransaction object on this connection. |
DatabaseConnection:: |
public | function | Tells this connection object what its target value is. |
DatabaseConnection:: |
protected | function | Set the list of prefixes used by this database connection. |
DatabaseConnection:: |
public | function | Associates a logging object with this connection. |
DatabaseConnection:: |
public | function | Tells this connection object what its key is. |
DatabaseConnection:: |
public | function | Prepares and returns a SELECT query object. |
DatabaseConnection:: |
public | function | Returns a DatabaseSchema object for manipulating the schema. |
DatabaseConnection:: |
public | function | Rolls back the transaction entirely or to a named savepoint. |
DatabaseConnection:: |
public | function | Provides a wrapper for the quote() function from the PDO object. |
DatabaseConnection:: |
abstract | function | Runs a SELECT query and stores its results in a temporary table. |
DatabaseConnection:: |
abstract public | function | Runs a limited-range query on this database object. |
DatabaseConnection:: |
public | function | Executes a query string against the database. |
DatabaseConnection:: |
public | function | Increases the depth of transaction nesting. |
DatabaseConnection:: |
public | function | Prepares a query string and returns the prepared statement. |
DatabaseConnection:: |
public | function | Provides a pass-through to the PDO prepare method. |
DatabaseConnection:: |
public | function | Appends a database prefix to all tables in a query. |
DatabaseConnection:: |
public | function | Decreases the depth of transaction nesting. |
DatabaseConnection:: |
protected | function | Internal function: commit all the transaction layers that can commit. |
DatabaseConnection:: |
abstract public | function | Retrieves an unique id from a given sequence. |
DatabaseConnection:: |
public | function | Prepares and returns a MERGE query object. |
DatabaseConnection:: |
abstract public | function | Gets any special processing requirements for the condition operator. |
DatabaseConnection:: |
public | function | Creates the appropriate sequence name for a given table and serial field. |
DatabaseConnection:: |
public | function | Flatten an array of query comments into a single comment string. |
DatabaseConnection:: |
public | function | Determines if there is an active transaction open. |
DatabaseConnection:: |
public | function | Prepares and returns an INSERT query object. |
DatabaseConnection:: |
public | function | Returns the target this connection is associated with. |
DatabaseConnection:: |
public | function | Gets the current logging object for this connection. |
DatabaseConnection:: |
public | function | Returns the key this connection is associated with. |
DatabaseConnection:: |
public | function | Gets the driver-specific override class if any for the specified class. |
DatabaseConnection:: |
public | function | Returns the connection information for this connection object. |
DatabaseConnection:: |
protected | function | Generates a temporary table name. |
DatabaseConnection:: |
protected | function | Sanitize a query comment string. |
DatabaseConnection:: |
protected | function | Expands out shorthand placeholders. |
DatabaseConnection:: |
public | function | Escapes a table name string. |
DatabaseConnection:: |
public | function | Escapes characters that work as wildcard characters in a LIKE pattern. |
DatabaseConnection:: |
public | function | Escapes a field name string. |
DatabaseConnection:: |
public | function | Escapes an alias name string. |
DatabaseConnection:: |
abstract public | function | Returns the type of database driver. |
DatabaseConnection:: |
public | function | Destroys this Connection object. |
DatabaseConnection:: |
public | function | Prepares and returns a DELETE query object. |
DatabaseConnection:: |
protected | function | Returns the default query options for any given query. |
DatabaseConnection:: |
abstract public | function | Returns the name of the PDO driver for this connection. |
DatabaseConnection:: |
abstract public | function | Creates a database. |
DatabaseConnection:: |
public | function | Throws an exception to deny direct access to transaction commits. |
DatabaseConnection:: |
protected | property | Whether this database connection supports transactions. |
DatabaseConnection:: |
protected | property | Tracks the number of "layers" of transactions currently active. |
DatabaseConnection:: |
protected | property | Whether this database connection supports transactional DDL. |
DatabaseConnection:: |
protected | property | An index used to generate unique temporary table names. |
DatabaseConnection:: |
protected | property | The database target this connection is for. |
DatabaseConnection:: |
protected | property | The name of the Statement class for this connection. |
DatabaseConnection:: |
protected | property | The schema object for this connection. |
DatabaseConnection:: |
protected | property | List of search values for use in prefixTables(). |
DatabaseConnection:: |
protected | property | List of replacement values for use in prefixTables(). |
DatabaseConnection:: |
protected | property | The prefixes used by this database connection. |
DatabaseConnection:: |
protected | property | The PDO object that is used for running database queries. |
DatabaseConnection:: |
protected | property | The current database logging object for this connection. |
DatabaseConnection:: |
protected | property | The key representing this connection. |
DatabaseConnection:: |
protected | property | List of escaped database, table, and field names, keyed by unescaped names. |
DatabaseConnection:: |
protected | property | List of escaped aliases names, keyed by unescaped aliases. |
DatabaseConnection:: |
protected | property | Index of what driver-specific class to use for various operations. |
DatabaseConnection:: |
protected | property | The connection information for this connection object. |