Implement vbs class that supports logical search/word search/phrase search + or/and keywords!

Class function. Replace the input string with the expression following the where keyword of the SQL statement:

Word search [for example: James]

Phrase search
Each word in a phrase will be retrieved.
For example: Xiaoqiang 1 Xiaoqiang 1 xiaoqiqiangqiang

Logical search
The and or operators are supported.
For example, Xiao Ming and Xiao Qiang

Composite condition:
Example: (Xiao Ming or Xiao Ming) and (Xiao Qiang or Xiao Qiang)
Example: (Xiao Ming or Xiao Ming) and Xiao Qiang
Example: root1 and (Cantonese or Beijingers)
-----------------------------------------------------------CopyCodeThe Code is as follows: Class createquerystring

Public objreg
Public intstart
Public strfield
Private objnode2
Private strtext

Public property let querystring (strvalue)
Strtext = lcase (strvalue)
End Property

Private sub class_initialize ()
Set objreg = new Regexp
Strfield = "(Title +Article)"
End sub

Private sub class_terminate ()
Set objreg = nothing
End sub

Public default function gettext ()
Dim blnres
Dim strsky
With objreg
. Ignorecase = true
. Global = true
. Pattern = "\ s"
Blnres =. Test (strtext)
End
If (not blnres) then
Intstart = 2
Gettext = strfield & "like '%" & strtext & "% '"
Else
Objreg. pattern = "\ sand | \ sor"
Blnres = objreg. Test (strtext)
If blnres then
Strsky = check ()
If strsky = false then
Gettext = Wahaha ()
Else
Gettext = strsky
End if
Else
Gettext = Wahaha ()
End if
End if
End Function

Private function Wahaha ()
Dim strter
Dim strlikes
Dim strors
Dim stri
Dim objre
Strter = ""
Strlikes = "or (" & strfield & "like '%"
Strors = "% ')"
Objreg. pattern = "(\ s * \ s )"
Set objre = objreg. Execute (strtext)
For each Stri in objre
Strter = strter & strlikes & stri & strors
Next
Wahaha = mid (strter, 4)
Intstart = 3
End Function

Private function checkyes (strmode, intcount)
Dim objnode1
Objreg. pattern = strmode
Set objnode1 = objreg. Execute (strtext)
If objnode1.count <1 then
Checkyes = true
Else
Set objnode2 = objnode1 (0)
If objnode2.submatches. Count <intcount then
Checkyes = true
End if
End if
End Function

private function orand ()
dim strsss
dim strccc
dim straaa
dim A143
dim I
dim objn
dim blntru
dim blnbbb
strsss = "(" & strfield & "like '%"
strccc = "% ') "
straaa =" "
n1 = 0
blntru = true
blnbbb = true

Objreg. pattern = "(\ s * \ s )"
Set objn = objreg. Execute (strtext)
A143 = objn. Count-1
If (objn. Item (A143) = "and") or (objn. Item (A143) = "or") then
Orand = false
Exit Function
End if
For each I in objn
If blntru then
If (I <> "and") and (I <> "or") then
Blntru = false
Straaa = straaa & strsss & I & strccc
Else
Blnbbb = false
Exit
End if
Else
If (I = "and") or (I = "or") then
Blntru = true
Straaa = straaa & I
Else
Blnbbb = false
Exit
End if
End if
Next
If (not blnbbb) then
Orand = false
Else
Orand = straaa
Intstart = 4
End if
End Function

Private function check ()
Dim re
Dim RE1
Dim re2
Dim RE3
Dim Str
Dim str1
Dim A1
Dim A2
Dim A3
Dim A4
STR = strfield & "like '%"
Str1 = "% '"
With objreg
. Pattern = "^ \ (. + \) \ s (and | or) \ s"
Re =. Test (strtext)
. Pattern = "\ s (and | or) \ s \ (. + \) $"
RE3 =. Test (strtext)
End
If Re and RE3 then
If checkyes ("^ \ (\ s * \ s) (\ bor \ B | \ band \ B) (\ s * \ s) \) (and | or) \ (\ s * \ s) (\ bor \ B | \ band \ B) (\ s * \ s) \) $ ", 6) then
Check = false
Else
With objnode2
A1 =. submatches (0)
A2 =. submatches (2)
A3 =. submatches (4)
A4 =. submatches (6)
Check = "(" & STR & A1 & str1 & "" &. submatches (1) & "" & STR & A2 & str1 &")"&_
. Submatches (3) & "(" & STR & A3 & str1 & "&. submatches (5) &" & STR & A4 & str1 &")"
Intstart = 5
End
End if
Elseif re then
If checkyes ("^ \ (\ s * \ s) (\ bor \ B | \ band \ B) (\ s * \ s) \) (and | or) (. +) ", 4) then
Check = false
Else
With objnode2
A1 =. submatches (0)
A2 =. submatches (2)
A3 =. submatches (4)
Check = "(" & STR & A1 & str1 & "" &. submatches (1) & "" & STR & A2 & str1 &")"&_
. Submatches (3) & "(" & STR & A3 & str1 &")"
Intstart = 5
End
End if
Elseif RE3 then
If checkyes ("(. +) (and | or) \ (\ s * \ s) (\ bor \ B | \ band \ B) (\ s * \ s) \) $ ", 4) then
Check = false
Else
With objnode2
A1 =. submatches (0)
A2 =. submatches (2)
A3 =. submatches (4)
Check = "(" & STR & A1 & str1 & ")" &. submatches (1) & "(" & STR & A2 & str1 &""&_
. Submatches (3) & "& STR & A3 & str1 &")"
Intstart = 5
End
End if
Else
Check = orand ()
End if
End Function

End Class

--------------------------- note that the replaced string is not a complete SQL statement. only the expression after the where keyword of the SQL statement is generated. sent to ASP Program . you can add
"select ID, title, name, tablename from searchall where "
similar SQL statement
explain VBScript example Example Explain
dim objroot1
set objroot1 = new createquerystring
objroot1.querystring = strtext' === input the string to be replaced
objroot1.strfield = "field name to be queried" '=== if not set. the default value is "(Title + Article)"
strtext = objroot1 () '========= the replaced SQL statement
If (objquerystring. intstart = 4) Then
call msgbox ("Start search by logic")
end if
set objroot1 = nothing