Wraps a statement in a callback that allows row results to be modified when being fetched.
This is used by CakePHP to eagerly load association data.
$_callback
protected callable
__construct( Cake\Database\StatementInterface $statement , Cake\Database\Driver $driver , callable $callback )
Constructor
Cake\Database\StatementInterface
$statement
Cake\Database\Driver
$driver
$callback
Cake\Database\Statement\StatementDecorator::__construct()
fetch( string $type 'num' )
Fetch a row from the statement.
The result will be processed by the callback when it is not false
.
$type
optional 'num' Cake\Database\Statement\StatementDecorator::fetch()
fetchAll( string $type 'num' )
Fetch all rows from the statement.
Each row in the result will be processed by the callback when it is not `false.
$type
optional 'num' Cake\Database\Statement\StatementDecorator::fetchAll()
__get( string $property )
Magic getter to return $queryString as read-only.
$property
bind( array $params , array $types )
Binds a set of values to statement object with corresponding type.
$params
$types
Cake\Database\StatementInterface::bind()
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.
$statement->bindValue(1, 'a title'); $statement->bindValue('active', true, 'boolean'); $statement->bindValue(5, new \DateTime(), 'date');
$column
$value
$type
optional 'string' Cake\Database\StatementInterface::bindValue()
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.
Cake\Database\StatementInterface::closeCursor()
columnCount( )
Returns the number of columns this statement's results will contain.
$statement = $connection->prepare('SELECT id, title from articles'); $statement->execute(); echo $statement->columnCount(); // outputs 2
Cake\Database\StatementInterface::columnCount()
count( )
Statements can be passed as argument for count() to return the number for affected rows from last execution.
Cake\Database\StatementInterface::count()
errorCode( )
Returns the error code for the last error that occurred when executing this statement.
Cake\Database\StatementInterface::errorCode()
errorInfo( )
Returns the error information for the last error that occurred when executing this statement.
Cake\Database\StatementInterface::errorInfo()
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
.
$params
optional null Cake\Database\StatementInterface::execute()
getInnerStatement( )
Returns the statement object that was decorated by this class.
Cake\Database\StatementInterface
getIterator( )
Statements are iterable as arrays, this method will return the iterator object for traversing all items in the result.
$statement = $connection->prepare('SELECT id, title from articles'); foreach ($statement as $row) { //do stuff }
IteratorAggregate::getIterator()
lastInsertId( string|null $table null , string|null $column null )
Returns the latest primary inserted using this statement.
$table
optional null $column
optional null Cake\Database\StatementInterface::lastInsertId()
rowCount( )
Returns the number of rows affected by this SQL statement.
$statement = $connection->prepare('SELECT id, title from articles'); $statement->execute(); print_r($statement->rowCount()); // will show 1
Cake\Database\StatementInterface::rowCount()
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
$value
Cake\Database\Type
|string $type
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.
$columns
$types
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https://api.cakephp.org/3.4/class-Cake.Database.Statement.CallbackStatement.html