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.
Property Summary
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$_driver protected
Cake\Database\DriverReference to the driver object associated to this statement.
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$_hasExecuted protected
boolWhether or not this statement has already been executed
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$_statement protected
mixedStatement instance implementation, such as PDOStatement or any other custom implementation.
Method Summary
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__construct() public
Constructor
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__get() public
Magic getter to return $queryString as read-only.
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bind() public
Binds a set of values to statement object with corresponding type.
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bindValue() public
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.
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cast() public
Converts a give value to a suitable database value based on type and return relevant internal statement type
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closeCursor() public
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.
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columnCount() public
Returns the number of columns this statement's results will contain.
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count() public
Statements can be passed as argument for count() to return the number for affected rows from last execution.
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errorCode() public
Returns the error code for the last error that occurred when executing this statement.
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errorInfo() public
Returns the error information for the last error that occurred when executing this statement.
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execute() public
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. -
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.
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fetchAll() public
Returns an array with all rows resulting from executing this statement.
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getInnerStatement() public
Returns the statement object that was decorated by this class.
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getIterator() public
Statements are iterable as arrays, this method will return the iterator object for traversing all items in the result.
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lastInsertId() public
Returns the latest primary inserted using this statement.
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matchTypes() public
Matches columns to corresponding types
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rowCount() public
Returns the number of rows affected by this SQL statement.
Method Detail
__construct() ¶ public
__construct(Cake\Database\StatementInterface|null $statement = null, Cake\Database\Driver|null $driver = null)Constructor
Parameters
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Cake\Database\StatementInterface|null$statement optional Statement implementation such as PDOStatement
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Cake\Database\Driver|null$driver optional Driver instance
__get() ¶ public
__get(string $property): mixedMagic getter to return $queryString as read-only.
Parameters
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string$property internal property to get
Returns
mixedbind() ¶ public
bind(array $params, array $types): voidBinds a set of values to statement object with corresponding type.
Parameters
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array$params list of values to be bound
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array$types list of types to be used, keys should match those in $params
Returns
voidbindValue() ¶ public
bindValue(string|int $column, mixed $value, string $type = 'string'): voidAssign 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');
$statement->bindValue(5, new \DateTime(), 'date');Parameters
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string|int$column name or param position to be bound
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mixed$value The value to bind to variable in query
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string$type optional name of configured Type class
Returns
voidcast() ¶ public
cast(mixed $value, Cake\Database\Type|string $type): arrayConverts a give value to a suitable database value based on type and return relevant internal statement type
Parameters
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mixed$value The value to cast
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Cake\Database\Type|string$type The type name or type instance to use.
Returns
arraycloseCursor() ¶ public
closeCursor(): voidCloses 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.
Returns
voidcolumnCount() ¶ public
columnCount(): intReturns 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 2Returns
intcount() ¶ public
count(): intStatements can be passed as argument for count() to return the number for affected rows from last execution.
Returns
interrorCode() ¶ public
errorCode(): int|stringReturns the error code for the last error that occurred when executing this statement.
Returns
int|stringerrorInfo() ¶ public
errorInfo(): arrayReturns the error information for the last error that occurred when executing this statement.
Returns
arrayexecute() ¶ public
execute(array $params = null): boolExecutes the statement by sending the SQL query to the database. It can optionally
take an array or arguments to be bound to the query variables. Please note
that binding parameters from this method will not perform any custom type conversion
as it would normally happen when calling bindValue.
Parameters
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array$params optional list of values to be bound to query
Returns
boolfetch() ¶ public
fetch(string $type = 'num'): mixedReturns 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
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string$type optional 'num' for positional columns, assoc for named columns
Returns
mixedfetchAll() ¶ public
fetchAll(string $type = 'num'): arrayReturns 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 for fetching columns as positional keys or assoc for column names as keys
Returns
arraygetInnerStatement() ¶ public
getInnerStatement(): Cake\Database\StatementInterfaceReturns the statement object that was decorated by this class.
Returns
Cake\Database\StatementInterfacegetIterator() ¶ public
getIterator(): IteratorStatements 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
IteratorlastInsertId() ¶ public
lastInsertId(string|null $table = null, string|null $column = null): stringReturns the latest primary inserted using this statement.
Parameters
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string|null$table optional table name or sequence to get last insert value from
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string|null$column optional the name of the column representing the primary key
Returns
stringmatchTypes() ¶ public
matchTypes(array $columns, array $types): arrayMatches columns to corresponding types
Both $columns and $types should either be numeric based or string key based at the same time.
Parameters
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array$columns list or associative array of columns and parameters to be bound with types
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array$types list or associative array of types
Returns
arrayrowCount() ¶ public
rowCount(): intReturns 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 1Returns
int