CDbCommandBuilder

Package	system.db.schema
Inheritance	class CDbCommandBuilder » CComponent
Subclasses	CMssqlCommandBuilder, COciCommandBuilder, CSqliteCommandBuilder
Since	1.0
Version	$Id: CDbCommandBuilder.php 2148 2010-05-20 12:22:44Z qiang.xue $

Property Details

database connection.

the schema for this command builder.

Method Details

public void __construct(CDbSchema $schema)
$schema	CDbSchema	the schema for this command builder

public string applyCondition(string $sql, string $condition)
$sql	string	the SQL statement without WHERE clause
$condition	string	the WHERE clause (without WHERE keyword)
{return}	string	the altered SQL statement

Alters the SQL to apply WHERE clause.

public string applyGroup(string $sql, string $group)
$sql	string	SQL query string without GROUP BY.
$group	string	GROUP BY
{return}	string	SQL with GROUP BY.

Alters the SQL to apply GROUP BY.

public string applyHaving(string $sql, string $having)
$sql	string	SQL query string without HAVING
$having	string	HAVING
{return}	string	SQL with HAVING

Alters the SQL to apply HAVING.

public string applyJoin(string $sql, string $join)
$sql	string	the SQL statement to be altered
$join	string	the JOIN clause (starting with join type, such as INNER JOIN)
{return}	string	the altered SQL statement

Alters the SQL to apply JOIN clause.

public string applyLimit(string $sql, integer $limit, integer $offset)
$sql	string	SQL query string without LIMIT and OFFSET.
$limit	integer	maximum number of rows, -1 to ignore limit.
$offset	integer	row offset, -1 to ignore offset.
{return}	string	SQL with LIMIT and OFFSET

Alters the SQL to apply LIMIT and OFFSET. Default implementation is applicable for PostgreSQL, MySQL and SQLite.

public string applyOrder(string $sql, string $orderBy)
$sql	string	SQL statement without ORDER BY.
$orderBy	string	column ordering
{return}	string	modified SQL applied with ORDER BY.

Alters the SQL to apply ORDER BY.

public void bindValues(CDbCommand $command, array $values)
$command	CDbCommand	database command
$values	array	values for binding (integer-indexed array for question mark placeholders, string-indexed array for named placeholders)

Binds parameter values for an SQL command.

public CDbCriteria createColumnCriteria(mixed $table, array $columns, mixed $condition='', array $params=array ( ), string $prefix=NULL)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$columns	array	column values that should be matched in the query (name=>value)
$condition	mixed	query condition or criteria. If a string, it is treated as query condition; If an array, it is treated as the initial values for constructing a CDbCriteria; Otherwise, it should be an instance of CDbCriteria.
$params	array	parameters to be bound to an SQL statement. This is only used when the second parameter is a string (query condition). In other cases, please use CDbCriteria::params to set parameters.
$prefix	string	column prefix (ended with dot). If null, it will be the table name
{return}	CDbCriteria	the created query criteria

Creates a query criteria with the specified column values.

protected string createCompositeInCondition(CDbTableSchema $table, array $values, string $prefix)
$table	CDbTableSchema	the table schema
$values	array	list of primary key values to be selected within
$prefix	string	column prefix (ended with dot)
{return}	string	the expression for selection

Generates the expression for selecting rows with specified composite key values.

public CDbCommand createCountCommand(mixed $table, CDbCriteria $criteria, string $alias='t')
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$criteria	CDbCriteria	the query criteria
$alias	string	the alias name of the primary table. Defaults to 't'.
{return}	CDbCommand	query command.

Creates a COUNT(*) command for a single table.

public CDbCriteria createCriteria(mixed $condition='', mixed $params=array ( ))
$condition	mixed	the table schema (CDbTableSchema) or the table name (string).
$params	mixed	query condition or criteria. If a string, it is treated as query condition (the WHERE clause); If an array, it is treated as the initial values for constructing a CDbCriteria object; Otherwise, it should be an instance of CDbCriteria.
{return}	CDbCriteria	the created query criteria

Creates a query criteria.

public CDbCommand createDeleteCommand(mixed $table, CDbCriteria $criteria)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$criteria	CDbCriteria	the query criteria
{return}	CDbCommand	delete command.

Creates a DELETE command.

public CDbCommand createFindCommand(mixed $table, CDbCriteria $criteria, string $alias='t')
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$criteria	CDbCriteria	the query criteria
$alias	string	the alias name of the primary table. Defaults to 't'.
{return}	CDbCommand	query command.

Creates a SELECT command for a single table.

public string createInCondition(mixed $table, mixed $columnName, array $values, string $prefix=NULL)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$columnName	mixed	the column name(s). It can be either a string indicating a single column or an array of column names. If the latter, it stands for a composite key.
$values	array	list of key values to be selected within
$prefix	string	column prefix (ended with dot). If null, it will be the table name
{return}	string	the expression for selection

Generates the expression for selecting rows of specified primary key values.

public CDbCommand createInsertCommand(mixed $table, array $data)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$data	array	data to be inserted (column name=>column value). If a key is not a valid column name, the corresponding value will be ignored.
{return}	CDbCommand	insert command

Creates an INSERT command.

public string createPkCondition(mixed $table, array $values, string $prefix=NULL)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$values	array	list of primary key values to be selected within
$prefix	string	column prefix (ended with dot). If null, it will be the table name
{return}	string	the expression for selection

Generates the expression for selecting rows of specified primary key values.

public CDbCriteria createPkCriteria(mixed $table, mixed $pk, mixed $condition='', array $params=array ( ), string $prefix=NULL)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$pk	mixed	primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
$condition	mixed	query condition or criteria. If a string, it is treated as query condition; If an array, it is treated as the initial values for constructing a CDbCriteria; Otherwise, it should be an instance of CDbCriteria.
$params	array	parameters to be bound to an SQL statement. This is only used when the second parameter is a string (query condition). In other cases, please use CDbCriteria::params to set parameters.
$prefix	string	column prefix (ended with dot). If null, it will be the table name
{return}	CDbCriteria	the created query criteria

Creates a query criteria with the specified primary key.

public string createSearchCondition(mixed $table, array $columns, mixed $keywords, string $prefix=NULL, boolean $caseSensitive=true)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$columns	array	list of column names for potential search condition.
$keywords	mixed	search keywords. This can be either a string with space-separated keywords or an array of keywords.
$prefix	string	optional column prefix (with dot at the end). If null, the table name will be used as the prefix.
$caseSensitive	boolean	whether the search is case-sensitive. Defaults to true. This parameter has been available since version 1.0.4.
{return}	string	SQL search condition matching on a set of columns. An empty string is returned if either the column array or the keywords are empty.

Generates the expression for searching the specified keywords within a list of columns. The search expression is generated using the 'LIKE' SQL syntax. Every word in the keywords must be present and appear in at least one of the columns.

public CDbCommand createSqlCommand(string $sql, array $params=array ( ))
$sql	string	the explicitly specified SQL statement
$params	array	parameters that will be bound to the SQL statement
{return}	CDbCommand	the created command

Creates a command based on a given SQL statement.

public CDbCommand createUpdateCommand(mixed $table, array $data, CDbCriteria $criteria)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$data	array	list of columns to be updated (name=>value)
$criteria	CDbCriteria	the query criteria
{return}	CDbCommand	update command.

Creates an UPDATE command.

public CDbCommand createUpdateCounterCommand(mixed $table, CDbCriteria $counters, array $criteria)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
$counters	CDbCriteria	the query criteria
$criteria	array	counters to be updated (counter increments/decrements indexed by column names.)
{return}	CDbCommand	the created command

Creates an UPDATE command that increments/decrements certain columns.

protected void ensureTable(mixed $table)
$table	mixed	table schema (CDbTableSchema) or table name (string). If this refers to a valid table name, this parameter will be returned with the corresponding table schema.

Checks if the parameter is a valid table schema. If it is a string, the corresponding table schema will be retrieved.

public CDbConnection getDbConnection()
{return}	CDbConnection	database connection.

public mixed getLastInsertID(mixed $table)
$table	mixed	the table schema (CDbTableSchema) or the table name (string).
{return}	mixed	last insertion id. Null is returned if no sequence name.

Returns the last insertion ID for the specified table.

public CDbSchema getSchema()
{return}	CDbSchema	the schema for this command builder.

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