Class BufferedStatement

A statement decorator that implements buffered results.

This statement decorator will save fetched results in memory, allowing the iterator to be rewound and reused.

Cake\Database\Statement\StatementDecorator implements Cake\Database\StatementInterface, Countable, IteratorAggregate uses Cake\Database\TypeConverterTrait
Extended by Cake\Database\Statement\BufferedStatement

Properties summary

  • $_allFetched protected
    boolean
    If true, all rows were fetched
  • $_count protected
    integer
    Records count
  • $_counter protected
    integer
    Current record pointer
  • $_records protected
    array
    Array of results

Inherited Properties

Method Summary

  • __construct() public
    Constructor
  • _reset() protected
    Reset all properties
  • execute() public
    Execute the statement and return the results.
  • fetch() public

    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.

  • fetchAll() public
    Returns an array with all rows resulting from executing this statement.
  • rewind() public
    Rewind the _counter property
  • rowCount() public
    Returns the number of rows affected by this SQL statement.

Method Detail

__construct()source 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

Overrides

Cake\Database\Statement\StatementDecorator::__construct()

_reset()source protected

_reset( )

Reset all properties

execute()source public

execute( array|null $params null )

Execute the statement and return the results.

Parameters

array|null $params optional null
list of values to be bound to query

Returns

boolean
true on success, false otherwise

Overrides

Cake\Database\Statement\StatementDecorator::execute()

fetch()source 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.

Parameters

string $type optional 'num'
The type to fetch.

Returns

array|false

Overrides

Cake\Database\Statement\StatementDecorator::fetch()

fetchAll()source public

fetchAll( string $type 'num' )

Returns an array with all rows resulting from executing this statement.

Parameters

string $type optional 'num'
The type to fetch.

Returns

array

Overrides

Cake\Database\Statement\StatementDecorator::fetchAll()

rewind()source public

rewind( )

Rewind the _counter property

rowCount()source public

rowCount( )

Returns the number of rows affected by this SQL statement.

Returns

integer

Overrides

Cake\Database\Statement\StatementDecorator::rowCount()

Methods inherited from Cake\Database\Statement\StatementDecorator

__get()source public

__get( string $property )

Magic getter to return $queryString as read-only.

Parameters

string $property
internal property to get

Returns

mixed

bind()source 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()

bindValue()source 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()

closeCursor()source 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()

columnCount()source 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

Implementation of

Cake\Database\StatementInterface::columnCount()

count()source public

count( )

Statements can be passed as argument for count() to return the number for affected rows from last execution.

Returns

integer

Implementation of

Cake\Database\StatementInterface::count()

errorCode()source public

errorCode( )

Returns the error code for the last error that occurred when executing this statement.

Returns

integer|string

Implementation of

Cake\Database\StatementInterface::errorCode()

errorInfo()source public

errorInfo( )

Returns the error information for the last error that occurred when executing this statement.

Returns

array

Implementation of

Cake\Database\StatementInterface::errorInfo()

getInnerStatement()source public

getInnerStatement( )

Returns the statement object that was decorated by this class.

Returns

Cake\Database\StatementInterface

getIterator()source 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

Implementation of

IteratorAggregate::getIterator()

lastInsertId()source 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

Implementation of

Cake\Database\StatementInterface::lastInsertId()

Methods used from Cake\Database\TypeConverterTrait

cast()source 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

matchTypes()source 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

Properties detail

$_allFetchedsource

protected boolean

If true, all rows were fetched

true

$_countsource

protected integer

Records count

$_countersource

protected integer

Current record pointer

$_recordssource

protected array

Array of results

[]

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https://api.cakephp.org/3.3/class-Cake.Database.Statement.BufferedStatement.html