function UpdateQuery::execute

Executes the UPDATE query.

Return value

The number of rows affected by the update.

Overrides Query::execute

File

includes/database/query.inc, line 1158

Class

UpdateQuery

General class for an abstracted UPDATE operation.

Code

public function execute() {
    // Expressions take priority over literal fields, so we process those first
    // and remove any literal fields that conflict.
    $fields = $this->fields;
    $update_values = array();
    foreach ($this->expressionFields as $field => $data) {
        if (!empty($data['arguments'])) {
            $update_values += $data['arguments'];
        }
        unset($fields[$field]);
    }
    // Because we filter $fields the same way here and in __toString(), the
    // placeholders will all match up properly.
    $max_placeholder = 0;
    foreach ($fields as $field => $value) {
        $update_values[':db_update_placeholder_' . $max_placeholder++] = $value;
    }
    if (count($this->condition)) {
        $this->condition
            ->compile($this->connection, $this);
        $update_values = array_merge($update_values, $this->condition
            ->arguments());
    }
    return $this->connection
        ->query((string) $this, $update_values, $this->queryOptions);
}