/**
* Preprocesses and validates the query.
*
* @return
* TRUE if the validation was successful, FALSE if not.
*
* @throws FieldsOverlapException
* @throws NoFieldsException
*/
public function preExecute()
{
// Confirm that the user did not try to specify an identical
// field and default field.
if (array_intersect($this->insertFields, $this->defaultFields)) {
throw new FieldsOverlapException('You may not specify the same field to have a value and a schema-default value.');
}
if (!empty($this->fromQuery)) {
// We have to assume that the used aliases match the insert fields.
// Regular fields are added to the query before expressions, maintain the
// same order for the insert fields.
// This behavior can be overridden by calling fields() manually as only the
// first call to fields() does have an effect.
$this->fields(array_merge(array_keys($this->fromQuery->getFields()), array_keys($this->fromQuery->getExpressions())));
} else {
// Don't execute query without fields.
if (count($this->insertFields) + count($this->defaultFields) == 0) {
throw new NoFieldsException('There are no fields available to insert with.');
}
}
// If no values have been added, silently ignore this query. This can happen
// if values are added conditionally, so we don't want to throw an
// exception.
if (!isset($this->insertValues[0]) && count($this->insertFields) > 0 && empty($this->fromQuery)) {
return FALSE;
}
return TRUE;
}
public function &getExpressions()
{
return $this->query->getExpressions();
}
