Analysis OBIEE——子字符串的语法错误？

我将下面的代码看作是对OBIEE分析中字段公式的编辑，但返回了一个错误。有什么想法吗

SUBSTRING("Dim - Vendor Header"."Dock Time", 
LOCATE(':',"Dim - Vendor Header"."Dock Time")+1, 
  (CHAR_LENGTH("Dim - Vendor Header"."Dock Time") - 
LOCATE(':',REVERSE("Dim - Vendor Header"."Dock Time")) - 
LOCATE(':',"Dim - Vendor Header"."Dock Time")))

错误如下：

Formula syntax is invalid.
[nQSError: 10058] A general error has occurred. [nQSError: 43113] Message 
returned from OBIS. [nQSError: 27002] Near <)>: Syntax error [nQSError: 
26012] .Please have your System Administrator look at the log for more 
details on this error. (HY000)
SQL Issued: SET VARIABLE DISABLE_CACHE_HIT=1; SELECT Substring ("Dim - 
Vendor Header"."Dock Time", LOCATE(':',"Dim - Vendor 
Header"."Dock Time")+1) FROM "XHSS - Vendor"
OK (Ignore Error)

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obiee12c中是否有任何函数字符串反转？ 你能不能试着只给出下面公式中的一部分，并检查相同的错误是得到

CHAR_LENGTHDim-供应商标题。停靠时间-定位“：”，REVERSEDim-供应商标题。停靠时间