storing binary data in a "memory" database

[Bob Sneidar]

Hi Doc thanks for the response. I am using aes256 encryption so an ascii hash is not viable. If this were a file based sqLite database I could perhaps change the encoding. Maybe I can with a :memory: database too! Here's my code. I have posted this before, it's an incredibly useful handler. If you provide pDBID it will ADD or REPLACE a table in that :memory: database. If you do NOT it will create a NEW :memory: database and return the database ID. The parameter pDBName is misnamed it should probably be pTableName. I'll fix that later. 

I suppose what I need is a statement to change the encoding of the database before I create it. 

put arrayToSQLite(tPasswordsDataA, ":memory:", "passwords", lMemoryDB) into lMemoryDB

FUNCTION arrayToSQLite pArrayDataA, pDBFile, pDBName, pDBID
   put the keys of pArrayDataA into tArrayKeys
   sort tArrayKeys numeric ascending
   IF pDBFile is empty THEN put ":memory:" into pDBFile
   IF pDBName is empty THEN put "arraydata" into pDBName
   
   TRY
      if pDBID is empty then \
            put revOpenDatabase("sqlite", pDBFile) into pDBID
      
      IF "Error" is in pDBID THEN
         return empty
      END IF
      
      put "drop table " & pDBName into tDropSQL
      revExecuteSQL pDBID, tDropSQL
      put  the result into tResult
   CATCH tError
      answer tError
      IF the environment is "development" THEN exit to top ELSE quit
   END TRY
   
   -- create the table
   put "create table" && quote & pDBName & quote \
         & cr into tCreateCommand
   put "(" & quote & "recordid" & quote && "NUMERIC PRIMARY KEY UNIQUE, " \
         & cr AFTER tCreateCommand
   
   put the keys of pArrayDataA [1] into tRecordKeyList
   
   REPEAT for each line tRecordKey in tRecordKeyList
      if pArrayDataA [1] [tRecordKey] is an array or \
            pArrayDataA [1] [tRecordKey] begins with "Salted__" then 
         put "BLOB" into tColumnType
      else
         put VARCHAR into tColumnType
      end if
      
      put quote & tRecordKey & quote && tColumnType & "," && cr AFTER tCreateCommand
   END REPEAT
   
   delete char -3 to -1 of tCreateCommand
   put ")" AFTER tCreateCommand
   
   TRY
      revExecuteSQL pDBID, tCreateCommand
      put the result into tResult
      IF tResult is not 0 THEN breakpoint
   CATCH tError
      breakpoint
   END TRY
   
   put 1 into tRecordCounter
   put "recordid" & cr & tRecordKeyList into tColumns
   
   repeat with i = 1 to the number of lines of tColumns
      put ":" & i into item i of tColumnList
   end repeat
   
   put "(" & tColumnList & ")" into tColumnList
   
   -- insert data
   REPEAT for each line tKey in tArrayKeys
      put 1 into tColumnCounter
      put pArrayDataA [tKey] into tRecordDataA
      put tRecordCounter into tQueryDataA [1]
      
      REPEAT for each line tRecordKey in tRecordKeyList
         add 1 to tColumnCounter
         
         if tRecordDataA [tRecordKey] is an array then
            put arrayEncode(tRecordDataA [tRecordKey]) into tValue
         else
            put tRecordDataA [tRecordKey] into tValue
         end if
         
         put tValue into tQueryDataA [tColumnCounter]
      END REPEAT
      
      put "insert into" && pDBName &&  "VALUES" && tColumnList into tInsertSQL
      
      TRY
         revExecuteSQL pDBID, tInsertSQL, "tQueryDataA"
         put the result into tResult
         if the result is not a number then breakpoint
      CATCH tError
         breakpoint
      END TRY
      
      add 1 to tRecordCounter
   END REPEAT
   
   return pDBID
END arrayToSQLite


> On Jun 3, 2022, at 15:04 , doc hawk via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> A couple of lines of code with declarations, storing, and retrieving would probably help.
> 
> 
> There also might be a UTF issue (which would be beyond me)—a hash should be in good old 6.5 bit ASCII, not something newfangled with eight or more bits.
> 
> 
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