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So I am trying to implement an archive system of sorts for my (SQLite) DB app. I wrote a function to attach a separate (archive) DB and

sync the columns with main DB. If archive DB file does not exist, create file with _SQLiteOpen then close the file (and thus connection) with SQLite_Close.

This works as intended, however, after the create operation, all subsequent _SQLite_* functions returned a "Library misuse error".

After a little digging I found the problem in the _SQLite_Close function: it clears the "last opened database" handle even when there still is a live

DB connection open. All other functions then "think" there is no DB connection active. I hacked two functions in the UDF for a quick fix:

In _SQLite_Close: Change

...

$__g_hDB_SQLite = 0
__SQLite_hDel($__g_ahDBs_SQLite, $hDB)
Return $iRval[0]

to:

$__g_hDB_SQLite = __SQLite_hDel($__g_ahDBs_SQLite, $hDB)
Return $iRval[0]

and in Func __SQLite_hDel changed

Func __SQLite_hDel(ByRef $ahLists, $hGeneric)
    Local $iElement = _ArraySearch($ahLists, $hGeneric)
    If $iElement > 0 Then _ArrayDelete($ahLists, $iElement)
EndFunc   ;==>__SQLite_hDel

to:

Func __SQLite_hDel(ByRef $ahLists, $hGeneric)
    Local $iElement = _ArraySearch($ahLists, $hGeneric)
    If $iElement > 0 Then
        _ArrayDelete($ahLists, $iElement)
        Return $ahLists[UBound($ahLists)-1] ; Return last opened db
    EndIf
    Return 0
EndFunc   ;==>__SQLite_hDel

so it preserves last opened DB again.

 

My archive function now works great :thumbsup:

I'm not sure if this should be classified as a bug, but I believe so...

Hope this helps someone before :mad2:

Edited by dmob
Add. info.

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Before creating a ticket, please post a short, stand-alone reproducer here, using the standard unmodified include.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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dmob,

Please do as jchd has suggested.

M23


Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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23 minutes ago, jchd said:

Before creating a ticket, please post a short, stand-alone reproducer here, using the standard unmodified include.

#include <SQLite.au3>
 _Example()

Func _Example()

    Local $sSQliteDll = _SQLite_Startup()
    ConsoleWrite("+ SQliteDll: " & $sSQliteDll & @CRLF)


    ; Create DB1
    Local $sFile1 = @ScriptDir & "\DB1.db"
    Local $oDB1 = _SQLite_Open($sFile1) ; create if not exist
    If @error Then
        ConsoleWrite("! OpenCreateErr[" & @error & "] " & _SQLite_ErrMsg() & @CRLF)
    Else
        ConsoleWrite("+ DB1 Handle: " & $oDB1 & @CRLF)
    EndIf

    ; Create DB2
    Local $sFile2 = @ScriptDir & "\DB2.db"
    Local $oDB2 = _SQLite_Open($sFile2) ; create if not exist
    If @error Then
        ConsoleWrite("!OpenCreateErr[" & @error & "] " & _SQLite_ErrMsg() & @CRLF)
    Else
        ConsoleWrite("+ DB2 Handle: " & $oDB2 & @CRLF)
    EndIf

    ; close DB2
    _SQLite_Close($oDB2)

    ; now attach DB2 to DB1
    Local $sQry = "ATTACH '" & $sFile2 & "' AS DB2;"
    Local $vRet = _SQLite_Exec(-1, $sQry)
    If @error Then
        ConsoleWrite("! AttachErr[" & @error & "] " & _SQLite_ErrMsg() & @CRLF)
    Else
        ConsoleWrite("+ ATTACH Successful" & @CRLF)
    EndIf

    _SQLite_Close($oDB1)
    _SQLite_Shutdown()

EndFunc

Scite output:

>"C:\Program Files (x86)\AutoIt3\SciTE\..\AutoIt3.exe" /ErrorStdOut "D:\Scripts\......au3"    
+ SQliteDll: sqlite3.dll
+ DB1 Handle: 0x00EF27D8
+ DB2 Handle: 0x00EF9A28
! AttachErr[2] Library used incorrectly
>Exit code: 0    Time: 0.9089

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33 minutes ago, dmob said:

Do I have to re-explain the bug or can I just link to this topic?

You should definitely link to the this topic, but copy-pasting your first post is also an option :)

Also including your code sample is a must!


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The error has nothing to do with how the include works.

When you create a new SQLite database, it doesn't actually exists until you really write to the DB file.  That is, you need to create a DDL element (table) else the file remains empty.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Also, the statement with attach is erroneous: you use -1 as the DB handle, which refers to the last handle used (which is $oDB2) but it's invalid after having closed the DB.

Change that line into:

    Local $vRet = _SQLite_Exec($oDB1, $sQry)

and everything should work fine.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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14 minutes ago, jchd said:

The error has nothing to do with how the include works.

I beg to differ. The UDF does actually clear the last used DB handle....

 

5 minutes ago, jchd said:

Also, the statement with attach is erroneous: you use -1 as the DB handle, which refers to the last handle used (which is $oDB2) but it's invalid after having closed the DB.

After having closed DB2, I would expect to still be able to use $oDB1, which IMHO should then be the last opened DB.

 

Are you thus implying the UDF was designed to use only one database at a time?

Edited by dmob

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The code clears the handle passed, just as announced.

5 minutes ago, dmob said:

After having closed DB2, I would expect to still be able to use $oDB1, which IMHO should then be the last opened DB.

You can use $oDB1, but it isn't the last handle used!  That the handle refers to an open or closed DB is irrelevant and a completely different question.

Edited by jchd

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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BTW I personnally regard this use of -1 to refer to something of the past in several functions spread in various UDFs to be undue laziness and a call for bugs.

Few years ago I had to actually use AutoIt for my own needs and had to handle up to 5 database connections at a time, using a large number of high-level functions.  It would have been an unmanageable nightmare to try to use -1 since the "last connection used" was such a moving target.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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27 minutes ago, jchd said:

That the handle refers to an open or closed DB is irrelevant and a completely different question.

32 minutes ago, dmob said:

which IMHO should then be the last opened DB

I should rephrase that and say "Should then be the last opened OPEN database. I would NOT try to access a DB I just closed,

nor would I expect its handle to be valid.

 

Anyhow, if it's not a bug that's ok, but the SQLite_Close function still exhibits "unexpected & possibly unwanted behaviour".

We can consider this topic closed since I have found the problem and a workaround.

Edited by dmob

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dmob,

Quote

Should then be the last opened OPEN database

That would be asking a lot of AutoIt. Throughout AutoIt "-1" is only used to denote "last created", not "last available" - which is all AutoIt should be expected to do. Expecting it to revert back through some form of GUI/control creation lineage is way beyond anything that could be reasonably expected.

And I agree totally with jchd that its use is to be strongly discouraged in anything but the very simplest scripts.

M23


Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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It may not be the behavior you expect, but it conforms to the specification (last used handle)... and legacy code.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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20 minutes ago, Melba23 said:

Throughout AutoIt "-1" is only used to denote "last created", not "last available"

That's fine with me, as I mentioned the hack I made satisfies both conditions: Once the last (when multiple DBs open) opened DB is closed, the previously opened "becomes" the last opened (__g_hDB_SQLite or -1 "points" to the last DB in the internal list of open DBs) until all DBs are closed, then the internal pointer ($__g_hDB_SQLite) is set to zero (when ALL opened DBs are closed) .

Edited by dmob

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You're again confusing "last open" and "last used" but it's OK if you've found a way to make things work the way you need.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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5 minutes ago, jchd said:

You're again confusing "last open" and "last used"

Pardon me, English aint my first language, I'm referring to the last database in the list of OPEN Dbs.

Edited by dmob

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    • By argumentum
      #include <SQLite.au3> ;-- When SQLite is compiled with the JSON1 extensions it provides builtin tools ;-- for manipulating JSON data stored in the database. ;-- This is a gist showing SQLite return query as a JSON object. ;-- https://www.sqlite.org/json1.html Example() Func Example() _SQLite_Startup() ; "<your path>\sqlite3.dll", False, 1) ; https://www.autoitscript.com/autoit3/docs/libfunctions/_SQLite_Startup.htm _SQLite_Open() ; ...if you can not run this due to errors, get the latest DLL from https://www.sqlite.org/ If _SQLite_Exec(-1, "CREATE TABLE users (id INTEGER PRIMARY KEY NOT NULL, full_name TEXT NOT NULL, email TEXT NOT NULL, created DATE NOT NULL );") Then Return 4 If _SQLite_Exec(-1, 'INSERT INTO users VALUES ' & _ '(1, "Bob McFett", "bmcfett@hunters.com", "32-01-01"),' & _ '(2, "Angus O''Vader","angus.o@destroyers.com", "02-03-04"),' & _ '(3, "Imperator Colin", "c@c.c", "01-01-01");') Then Return 5 ; -- Get query data as a JSON object using the ; -- json_group_object() [1] and json_object() [2] functions. _SQLite_GetTable2d_ArrayToConsole("SELECT" & _ " json_group_object(" & _ " email," & _ " json_object('full_name', full_name, 'created', created)" & _ " ) AS json_result" & _ " FROM (SELECT * FROM users WHERE created > ""02-01-01"");") ; {"bmcfett@hunters.com":{"full_name":"Bob McFett","created":"32-01-01"},"angus.o@destroyers.com":{"full_name":"Angus O'Vader","created":"02-03-04"}} ; -- Get query data as a JSON object using the ; -- json_group_array() function to maintain order. _SQLite_GetTable2d_ArrayToConsole("SELECT" & _ " json_group_array(" & _ " json_object('full_name', full_name, 'created', created)" & _ " ) AS my_json_result_OrAnythingReally" & _ " FROM (SELECT * FROM users ORDER BY created);") ; [{"full_name":"Imperator Colin","created":"01-01-01"},{"full_name":"Angus O'Vader","created":"02-03-04"},{"full_name":"Bob McFett","created":"32-01-01"}] ;-- Links ;-- [1] https://www.sqlite.org/json1.html#jgroupobject ;-- [2] https://www.sqlite.org/json1.html#jobj ; example found at https://gist.github.com/akehrer/481a38477dd0518ec0086ac66e38e0e2 EndFunc ;==>Example Func _SQLite_GetTable2d_ArrayToConsole($sSQL, $hDB = -1) Local $aResult, $iRows, $iColumns If _SQLite_GetTable2d($hDB, $sSQL, $aResult, $iRows, $iColumns) Then ConsoleWrite("! SQLite Error: " & _SQLite_ErrCode($hDB) & @CRLF & "! " & _SQLite_ErrMsg($hDB) & @CRLF) Else _SQLite_Display2DResult($aResult) EndIf ConsoleWrite(@CRLF) EndFunc ;==>_SQLite_GetTable2d_ArrayToConsole Based on this example, you can build your own query. 
      The code has all the explanations.
      Enjoy  
    • By argumentum
      #include <SQLite.au3> ;~ #include <SQLite.dll.au3> Local $hQuery, $aRow, $aNames _SQLite_Startup() ConsoleWrite("_SQLite_LibVersion=" & _SQLite_LibVersion() & @CRLF) _SQLite_Open() ; open :memory: Database _SQLite_Exec(-1, "CREATE TABLE aTest (A,B int not null unique ,C text);") _SQLite_Exec(-1, "INSERT INTO aTest(a,b,c) VALUES ('c','2','World');") _SQLite_Exec(-1, "INSERT INTO aTest(a,b,c) VALUES ('b','3',' ');") _SQLite_Exec(-1, "INSERT INTO aTest(a,b,c) VALUES ('a','1','Hello');") _SQLite_Query(-1, "SELECT _ROWID_,* FROM aTest ORDER BY a;", $hQuery) _SQLite_FetchTypes($hQuery, $aNames) ; Read out Column Types ConsoleWrite(StringFormat(" %-10s %-10s %-10s %-10s ", $aNames[0], $aNames[1], $aNames[2], $aNames[3]) & @CRLF) _SQLite_FetchNames($hQuery, $aNames) ; Read out Column Names ConsoleWrite(StringFormat(" %-10s %-10s %-10s %-10s ", $aNames[0], $aNames[1], $aNames[2], $aNames[3]) & @CRLF) While _SQLite_FetchData($hQuery, $aRow) = $SQLITE_OK ConsoleWrite(StringFormat(" %-10s %-10s %-10s %-10s ", $aRow[0], $aRow[1], $aRow[2], $aRow[3]) & @CRLF) WEnd _SQLite_Exec(-1, "DROP TABLE aTest;") _SQLite_Close() _SQLite_Shutdown() ; Output: ; INTEGER int text ; rowid A B C ; 3 a 1 Hello ; 2 b 3 ; 1 c 2 World Func _SQLite_FetchTypes($hQuery, ByRef $aTypes) Dim $aTypes[1] If __SQLite_hChk($hQuery, 3, False) Then Return SetError(@error, 0, $SQLITE_MISUSE) Local $avDataCnt = DllCall($__g_hDll_SQLite, "int:cdecl", "sqlite3_column_count", "ptr", $hQuery) If @error Then Return SetError(1, @error, $SQLITE_MISUSE) ; DllCall error If $avDataCnt[0] <= 0 Then Return SetError(-1, 0, $SQLITE_DONE) ReDim $aTypes[$avDataCnt[0]] Local $avColName For $iCnt = 0 To $avDataCnt[0] - 1 $avColName = DllCall($__g_hDll_SQLite, "wstr:cdecl", "sqlite3_column_decltype16", "ptr", $hQuery, "int", $iCnt) If @error Then Return SetError(2, @error, $SQLITE_MISUSE) ; DllCall error $aTypes[$iCnt] = $avColName[0] Next Return $SQLITE_OK EndFunc ;==>_SQLite_FetchTypes  If you wanna build a proper JSON string, you may want to know if is {"int":123} or {"text":"123"}
      and for that, this can help, obviously only when declared in the SQLite table.
    • By argumentum
      I was thinking but I don't have the experience, so you may have the experience.
      I was thinking to chop a DB with 100.000 ( 20 columns ) in 10.000 DB chunks ( 10 DBs ) and query concurrently all of them to speed up a search, then add the results. Is that a sound idea ? Or will I run in trouble down the road. Should a DB better be keep in one piece ?
      The DB is now in MySQL. I wanna do all this chopping and use SQLite. 
      Thanks
      [solved]
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