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1. drupal
   1. drupal7

Specify fields to be updated as an expression.

Expression fields are cases such as counter=counter+1. This method only applies if a duplicate key is detected. This method takes precedent over both update() and updateExcept().

Übergabeparameter

$field The field to set.

$expression The field will be set to the value of this expression. This parameter may include named placeholders.

$arguments If specified, this is an array of key/value pairs for named placeholders corresponding to the expression.

Rückgabewert

The called object.

Verwandte Themen

Database abstraction layer

Allow the use of different database servers using the same code base.

Code

includes/database/query.inc, line 669

<?php
public function expression($field, $expression, array $arguments = NULL) {
  $this->expressionFields[$field] = array(
      'expression' => $expression,
      'arguments' => $arguments,
    );

  return $this;
}
?>