protected function parseJoinOperator(SQLTokenIterator $tokens)
{
$joinData = array('isInner' => false, 'isRight' => false);
if ($tokens->seekTokenText(',')) {
return $joinData;
}
if (!$tokens->isTokenNum(SqlToken::T_JOIN(), TokenIterator::NEXT, [SqlToken::T_LEFT(), SqlToken::T_RIGHT(), SqlToken::T_INNER(), SqlToken::T_OUTER(), SqlToken::T_CROSS()])) {
return null;
}
while (true) {
switch (true) {
case $tokens->seekTokenNum(SqlToken::T_RIGHT()):
$joinData['isRight'] = true;
break;
case $tokens->seekTokenNum(SqlToken::T_LEFT()):
$joinData['isRight'] = false;
break;
case $tokens->seekTokenNum(SqlToken::T_INNER()):
$joinData['isInner'] = true;
break;
case $tokens->seekTokenNum(SqlToken::T_CROSS()):
case $tokens->seekTokenNum(SqlToken::T_OUTER()):
$joinData['isInner'] = false;
break;
case $tokens->seekTokenNum(SqlToken::T_JOIN()):
return $joinData;
default:
throw new MalformedSqlException("Invalid JOIN definition!");
}
}
}
