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bug#67142: closed (29.1; with-sqlite-transaction commits on exception ra


From: GNU bug Tracking System
Subject: bug#67142: closed (29.1; with-sqlite-transaction commits on exception rather than rolling back)
Date: Tue, 21 Nov 2023 13:41:02 +0000

Your message dated Tue, 21 Nov 2023 15:39:52 +0200
with message-id <831qcji5sn.fsf@gnu.org>
and subject line Re: bug#67142: 29.1; with-sqlite-transaction commits on 
exception rather than rolling back
has caused the debbugs.gnu.org bug report #67142,
regarding 29.1; with-sqlite-transaction commits on exception rather than 
rolling back
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs@gnu.org.)


-- 
67142: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=67142
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems
--- Begin Message --- Subject: 29.1; with-sqlite-transaction commits on exception rather than rolling back Date: Mon, 13 Nov 2023 01:47:01 +0100
During experimentation with built-in SQLite support, I've noticed that
if I use `with-sqlite-transaction' and there is a mistake in the body,
`sqlite-commit' is executed rather than `sqlite-rollback', thereby
committing the changes done up to the error instead of backing out.

This appears to be unusual behavior. From my quick research, the
following SQLite bindings in other languages have an equivalent to
`with-sqlite-transaction' and back out changes on error:

- CHICKEN Scheme:
  https://api.call-cc.org/5/doc/sql-de-lite#def:with-transaction
- Go: https://pkg.go.dev/database/sql#Conn.BeginTx
- Racket: 
https://docs.racket-lang.org/db/query-api.html#%28def._%28%28lib._db%2Fbase..rkt%29._call-with-transaction%29%29
- Ruby: 
https://www.rubydoc.info/gems/sqlite3/1.4.2/SQLite3/Database#transaction-instance_method
- Rust:
  
https://docs.rs/rusqlite/latest/rusqlite/struct.Connection.html#method.transaction

In languages not offering an equivalent API, it was instead recommended
to manually issue BEGIN/COMMIT/ROLLBACK statements. But given that
`with-sqlite-transaction' exists, it would be less confusing to make it
back out on exception (and re-raise the original error).


In GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.38,
cairo version 1.17.8)
Windowing system distributor 'The X.Org Foundation', version 11.0.12101009
System Description: Arch Linux

Configured using:
 'configure --sysconfdir=/etc --prefix=/usr --libexecdir=/usr/lib
 --with-tree-sitter --localstatedir=/var --with-cairo
 --disable-build-details --with-harfbuzz --with-libsystemd
 --with-modules --with-x-toolkit=gtk3 'CFLAGS=-march=x86-64
 -mtune=generic -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=2
 -Wformat -Werror=format-security -fstack-clash-protection
 -fcf-protection -g
 -ffile-prefix-map=/build/emacs/src=/usr/src/debug/emacs -flto=auto'
 'LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -flto=auto''

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS
TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB

Important settings:
  value of $LC_MESSAGES: 
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search time-date subr-x mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
cl-loaddefs cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils rmc iso-transl tooltip cconv eldoc paren electric
uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu
timer select scroll-bar mouse jit-lock font-lock syntax font-core
term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
emacs)

Memory information:
((conses 16 36631 11549)
 (symbols 48 5153 0)
 (strings 32 13273 1917)
 (string-bytes 1 378652)
 (vectors 16 9346)
 (vector-slots 8 149327 16481)
 (floats 8 21 19)
 (intervals 56 235 0)
 (buffers 984 10))

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--- End Message ---
--- Begin Message --- Subject: Re: bug#67142: 29.1; with-sqlite-transaction commits on exception rather than rolling back Date: Tue, 21 Nov 2023 15:39:52 +0200
> Date: Mon, 20 Nov 2023 22:14:00 +0100
> From: Vasilij Schneidermann <mail@vasilij.de>
> Cc: visuweshm@gmail.com, 67142@debbugs.gnu.org
> 
> Thank you, this looks very good. I've tested it on my own code using the
> SQLite support and there don't appear to be any (obvious issues).

Thanks for testing and for the valuable feedback, I've now installed
this on the emacs-29 branch, and I'm therefore closing this bug.


--- End Message ---

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