Class StatementDecorator
Represents a database statement. Statements contains queries that can be executed multiple times by binding different values on each call. This class also helps convert values to their valid representation for the corresponding types.
This class is but a decorator of an actual statement implementation, such as PDOStatement.
- Cake\Database\Statement\StatementDecorator implements Cake\Database\StatementInterface, Countable, IteratorAggregate uses Cake\Database\TypeConverterTrait
Direct known subclasses
Cake\Database\Statement\BufferedStatement, Cake\Database\Statement\CallbackStatement, Cake\Database\Statement\PDOStatementMethod Detail
__constructsource public
__construct( Cake\Database\StatementInterface|null $statement null , Cake\Database\Driver|null $driver null )
Constructor
Parameters
-
Cake\Database\StatementInterface
|null$statement
optional null - Statement implementation such as PDOStatement
-
Cake\Database\Driver
|null$driver
optional null - Driver instance
__getsource public
__get( string $property )
Magic getter to return $queryString as read-only.
Parameters
- string
$property
- internal property to get
Returns
mixed
mixed
bindsource public
bind( array $params , array $types )
Binds a set of values to statement object with corresponding type.
Parameters
- array
$params
- list of values to be bound
- array
$types
- list of types to be used, keys should match those in $params
Implementation of
Cake\Database\StatementInterface::bind()
bindValuesource public
bindValue( string|integer $column , mixed $value , string $type 'string' )
Assign a value to a positional or named variable in prepared query. If using positional variables you need to start with index one, if using named params then just use the name in any order.
It is not allowed to combine positional and named variables in the same statement.
Examples:
$statement->bindValue(1, 'a title'); $statement->bindValue('active', true, 'boolean'); $statement->bindValue(5, new \DateTime(), 'date');
Parameters
- string|integer
$column
- name or param position to be bound
- mixed
$value
- The value to bind to variable in query
- string
$type
optional 'string' - name of configured Type class
Implementation of
Cake\Database\StatementInterface::bindValue()
closeCursorsource public
closeCursor( )
Closes a cursor in the database, freeing up any resources and memory allocated to it. In most cases you don't need to call this method, as it is automatically called after fetching all results from the result set.
Implementation of
Cake\Database\StatementInterface::closeCursor()
columnCountsource public
columnCount( )
Returns the number of columns this statement's results will contain.
Example:
$statement = $connection->prepare('SELECT id, title from articles'); $statement->execute(); echo $statement->columnCount(); // outputs 2
Returns
integer
int
Implementation of
Cake\Database\StatementInterface::columnCount()
countsource public
count( )
Statements can be passed as argument for count() to return the number for affected rows from last execution.
Returns
integer
int
Implementation of
Cake\Database\StatementInterface::count()
errorCodesource public
errorCode( )
Returns the error code for the last error that occurred when executing this statement.
Returns
integer|string
int|string
Implementation of
Cake\Database\StatementInterface::errorCode()
errorInfosource public
errorInfo( )
Returns the error information for the last error that occurred when executing this statement.
Returns
array
array
Implementation of
Cake\Database\StatementInterface::errorInfo()
executesource public
execute( array|null $params null )
Executes the statement by sending the SQL query to the database. It can optionally take an array or arguments to be bound to the query variables. Please note that binding parameters from this method will not perform any custom type conversion as it would normally happen when calling bindValue
.
Parameters
- array|null
$params
optional null - list of values to be bound to query
Returns
boolean
true on success, false otherwise
Implementation of
Cake\Database\StatementInterface::execute()
fetchsource public
fetch( string $type 'num' )
Returns the next row for the result set after executing this statement. Rows can be fetched to contain columns as names or positions. If no rows are left in result set, this method will return false.
Example:
$statement = $connection->prepare('SELECT id, title from articles'); $statement->execute(); print_r($statement->fetch('assoc')); // will show ['id' => 1, 'title' => 'a title']
Parameters
- string
$type
optional 'num' - 'num' for positional columns, assoc for named columns
Returns
array|false
Result array containing columns and values or false if no results are left
Implementation of
Cake\Database\StatementInterface::fetch()
fetchAllsource public
fetchAll( string $type 'num' )
Returns an array with all rows resulting from executing this statement.
Example:
$statement = $connection->prepare('SELECT id, title from articles'); $statement->execute(); print_r($statement->fetchAll('assoc')); // will show [0 => ['id' => 1, 'title' => 'a title']]
Parameters
- string
$type
optional 'num' - num for fetching columns as positional keys or assoc for column names as keys
Returns
array
List of all results from database for this statement
Implementation of
Cake\Database\StatementInterface::fetchAll()
getInnerStatementsource public
getInnerStatement( )
Returns the statement object that was decorated by this class.
Returns
Cake\Database\StatementInterface
\Cake\Database\StatementInterface
getIteratorsource public
getIterator( )
Statements are iterable as arrays, this method will return the iterator object for traversing all items in the result.
Example:
$statement = $connection->prepare('SELECT id, title from articles'); foreach ($statement as $row) { //do stuff }
Returns
Iterator
\Iterator
Implementation of
IteratorAggregate::getIterator()
lastInsertIdsource public
lastInsertId( string|null $table null , string|null $column null )
Returns the latest primary inserted using this statement.
Parameters
- string|null
$table
optional null - table name or sequence to get last insert value from
- string|null
$column
optional null - the name of the column representing the primary key
Returns
string
string
Implementation of
Cake\Database\StatementInterface::lastInsertId()
rowCountsource public
rowCount( )
Returns the number of rows affected by this SQL statement.
Example:
$statement = $connection->prepare('SELECT id, title from articles'); $statement->execute(); print_r($statement->rowCount()); // will show 1
Returns
integer
int
Implementation of
Cake\Database\StatementInterface::rowCount()
Methods used from Cake\Database\TypeConverterTrait
castsource public
cast( mixed $value , Cake\Database\Type|string $type )
Converts a give value to a suitable database value based on type and return relevant internal statement type
Parameters
- mixed
$value
- The value to cast
-
Cake\Database\Type
|string$type
- The type name or type instance to use.
Returns
array
list containing converted value and internal type
matchTypessource public
matchTypes( array $columns , array $types )
Matches columns to corresponding types
Both $columns and $types should either be numeric based or string key based at the same time.
Parameters
- array
$columns
- list or associative array of columns and parameters to be bound with types
- array
$types
- list or associative array of types
Returns
array
array
Properties summary
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http://api.cakephp.org/3.1/class-Cake.Database.Statement.StatementDecorator.html