public function testIsEmpty()
{
$where = new Where(new Identifier('hello'));
$this->assertSame(false, $where->isEmpty());
$where = new Where();
$this->assertSame(true, $where->isEmpty());
$where->addAnd(new Identifier('hello'));
$this->assertSame(false, $where->isEmpty());
}
/**
*
* @param mixed $type
* @param Literal|string $table
* @param mixed $condition
* @return $this
* @throws Exception
*/
private function join($type, $table, $condition)
{
$tableExpression = null;
if ($table instanceof Literal) {
$tableExpression = $table;
} elseif (is_string($table)) {
$tableExpression = new Identifier($table);
} else {
throw new Exception('Table name or Literal expected');
}
$condArgs = array_slice(func_get_args(), 2);
$joinCondition = WhereUpdateCommon::extractExpressions($condArgs);
$where = new Where();
foreach ($joinCondition as $jc) {
$where->addAnd($jc);
}
$info = new JoinInfo($type, $tableExpression, $where->getExpression());
$this->joins[] = $info;
return $this;
}