OrientDB 踩坑記錄

• 子查詢得到的結果默認是 Collection, 判斷相等的時候需要先調用 FIRST(subQuery) 方法(或其它方法),否則會出現等式判斷錯誤.
  
  • 正確: SELECT FROM Person WHERE name = FIRST((SELECT name FROM Person))
  • 錯誤: SELECT FROM Person WHERE name = (SELECT name FROM Person)