I have a habit of putting schema definitions in a file that's always
safe to read and execute against a DB connection. This means that I
DROP some things IF EXISTS and CREATE all things IF NOT EXISTS.
But if I have to ALTER TABLE... there's no IF NOT EXISTS .. equivalent
for ALTER TABLE.
Funny
On 16 Dec 2014, at 10:40pm, Nico Williams n...@cryptonector.com wrote:
I have a habit of putting schema definitions in a file that's always
safe to read and execute against a DB connection. This means that I
DROP some things IF EXISTS and CREATE all things IF NOT EXISTS.
But if I have to
On Tue, Dec 16, 2014 at 11:40:22PM +, Simon Slavin wrote:
If 'ALTER TABLE ... ADD COLUMN ...' fails it fails harmlessly, with
But it doesn't fail so harmlessly:
$ sqlite3 db 'alter table toy add column foo text; select 5;' || echo fail
SQL Error: duplicate column name: foo
fail
$
Note
On Mon, Aug 12, 2013 at 4:34 PM, Scott Hess sh...@google.com wrote:
I had been attempting to write some code like this:
CREATE TABLE t (x);
CREATE INDEX t_x ON t(x);
-- bunch of operations over a long period.
-- now we want to run an expiration pass:
BEGIN;
ALTER TABLE t RENAME TO t_old;
Hi,
I'm an user of sqlite with the spatial extension spatialite.
I see the sqlite db allow to define a constraints when are in the creating
phase of the table.
But is not possible to add or drop a constraint after the table is created.
In the GIS data the availability of the constraints is a
AM, sqlite-users-requ...@sqlite.org wrote:
Message: 9
Date: Sun, 9 Sep 2012 11:19:21 +0200
From: Andrea Peri aperi2...@gmail.com
To: sqlite-users@sqlite.org
Subject: [sqlite] Alter table constraint question
Message-ID:
CABqTJk-URe6sGd143HQ_9pso1C8=
nxznqt0f+jyqmnyqbda
As pointed out, there are products out there that will add or drop
constraints (by doing all the tedious table creation/rename/drop under
the covers) for SQLite. The other approach is to do what SpatiaLite
does in general -- use triggers instead of check constraints but for the
same purpose
Hi all,
I need to alter a field from smallint(1) to smallint(2),
is there to do this using ALTER TABLE ?
Thanks in advance
Marco
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On Tue, Feb 28, 2012 at 7:14 AM, Marco Turco m.tu...@softwarexp.co.ukwrote:
Hi all,
I need to alter a field from smallint(1) to smallint(2),
No you don't; not unless your application or the wrapper you are using are
reading the schema or datatypes separately. SQLite itself makes no
Is there no way to force columns added to a table with alter table to be
added at certain column positions?
Alternatively, if there is some way to save the data in an existing
table; drop the table; re-create the table with the desired schema; and
then reload the data, this would be useful as
On Feb 6, 2012, at 9:36 AM, Bill McCormick wrote:
Is there no way to force columns added to a table with alter table to be
added at certain column positions?
Alternatively, if there is some way to save the data in an existing table;
drop the table; re-create the table with the desired
On 2/6/2012 8:36 AM, Bill McCormick wrote:
Is there no way to force columns added to a table with alter table to
be added at certain column positions?
Alternatively, if there is some way to save the data in an existing
table; drop the table; re-create the table with the desired schema;
and
Gerry Snyder wrote, On 2/6/2012 9:48 AM:
On 2/6/2012 8:36 AM, Bill McCormick wrote:
Is there no way to force columns added to a table with alter table to
be added at certain column positions?
Alternatively, if there is some way to save the data in an existing
table; drop the table; re-create
On 2/6/2012 9:22 AM, Bill McCormick wrote:
Sorry, I should have mentioned that I did see that, but it doesn't
quite fit my application. I need a script that doesn't care what the
existing table looks like. In my situation, I may have dozens of
databases among different locations, perhaps not
AM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] ALTER TABLE
On 2/6/2012 9:22 AM, Bill McCormick wrote:
Sorry, I should have mentioned that I did see that, but it doesn't
quite fit my application. I need a script that doesn't care what the
existing table looks like. In my
On Mon, Feb 6, 2012 at 9:36 AM, Bill McCormick wpmccorm...@gmail.com wrote:
Is there no way to force columns added to a table with alter table to be
added at certain column positions?
Alternatively, if there is some way to save the data in an existing table;
drop the table; re-create the
Nico Williams wrote, On 2/6/2012 12:44 PM:
On Mon, Feb 6, 2012 at 9:36 AM, Bill McCormickwpmccorm...@gmail.com wrote:
Is there no way to force columns added to a table with alter table to be
added at certain column positions?
Alternatively, if there is some way to save the data in an existing
On 06/02/2012 1:59 PM, Bill McCormick wrote:
Nico Williams wrote, On 2/6/2012 12:44 PM:
On Mon, Feb 6, 2012 at 9:36 AM, Bill
McCormickwpmccorm...@gmail.com wrote:
Is there no way to force columns added to a table with alter table
to be
added at certain column positions?
Alternatively, if
On 06 Feb 2012 at 19:31, Ryan Johnson ryan.john...@cs.utoronto.ca wrote:
On 06/02/2012 1:59 PM, Bill McCormick wrote:
The order is not important. What is important is that I come up with
some way to manage version updates. I've tried doing something similar
in the past using an alter tables
I'm pretty sure that the user_version pragma is considered stable.
That said, if your application is in full control of the DB then you
could just check the exact create statements logged in sqlite_master
(this is probably less stable, ironically enough).
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 06/02/12 12:50, Tim Streater wrote:
Can that [pragma user_version] be relied upon, though?
It is used by both Firefox and Android. The actual value is stored in the
SQLite header. It would be astonishing and unprecedented for the SQLite
team to
Alter table add column command drop data from table.
Can you keep the data or should I store the data before the alter and then put
them in the table?
--
Fabio Spadaro
www.fabiospadaro.com
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On May 31, 2011, at 10:11 AM, Fabio Spadaro wrote:
Alter table add column command drop data from table.
Can you keep the data or should I store the data before the alter and then put
them in the table?
ALTER TABLE ADD COLUMN does not drop data from the table.
On Tue, May 31, 2011 at 5:11 PM, Fabio Spadaro fabiolinos...@gmail.comwrote:
Alter table add column command drop data from table.
Can you keep the data or should I store the data before the alter and then
put
them in the table?
http://www.sqlite.org/lang_altertable.html
says:
The
Hi
2011/5/31 Stephan Beal sgb...@googlemail.com
On Tue, May 31, 2011 at 5:11 PM, Fabio Spadaro fabiolinos...@gmail.com
wrote:
Alter table add column command drop data from table.
Can you keep the data or should I store the data before the alter and
then
put
them in the table?
On Tue, May 31, 2011 at 6:09 PM, Fabio Spadaro fabiolinos...@gmail.comwrote:
To recap:
Step 1: alter table pippo rename to fabio - ok
step 2: insert into fabio (field1) values ('1 ') - ko
OperationalError: no such table main.pippo
Step 3: alter table add column fabio field2 integer null
On 31 May 2011, at 5:09pm, Fabio Spadaro wrote:
Step 1: alter table pippo rename to fabio - ok
step 2: insert into fabio (field1) values ('1 ') - ko
OperationalError: no such table main.pippo
How does step 2 know the name 'pippo' ? You don't seem to supply it in the
command.
Simon.
To: [EMAIL PROTECTED]
Cc: sqlite-users@sqlite.org
Subject: Re: [sqlite] ALTER TABLE and INTEGER PRIMARY KEY.
On 8/14/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Scott Hess [EMAIL PROTECTED] wrote:
I was getting ready to checkin the rowid-versus-fts2 fix, and wanted
to add one last
I was getting ready to checkin the rowid-versus-fts2 fix, and wanted
to add one last bit, to upgrade older tables.
Unfortunately, code of the form:
ALTER TABLE x_segments ADD id INTEGER PRIMARY KEY;
is documented as not supported.
http://www.sqlite.org/lang_altertable.html . As far as I can
Scott Hess [EMAIL PROTECTED] wrote:
I was getting ready to checkin the rowid-versus-fts2 fix, and wanted
to add one last bit, to upgrade older tables.
Unfortunately, code of the form:
ALTER TABLE x_segments ADD id INTEGER PRIMARY KEY;
is documented as not supported.
--- Scott Hess [EMAIL PROTECTED] wrote:
This may mean that I'll need to branch fts2 to fts3 and deprecate
fts1/2 as being not safe for use. If the code is going to have to
create new tables and populate them, then there's not a lot of gain
versus just having the developer do that.
Is it a
--- [EMAIL PROTECTED] wrote:
Scott Hess [EMAIL PROTECTED] wrote:
I was getting ready to checkin the rowid-versus-fts2 fix, and wanted
to add one last bit, to upgrade older tables.
Unfortunately, code of the form:
ALTER TABLE x_segments ADD id INTEGER PRIMARY KEY;
is
On 8/14/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Scott Hess [EMAIL PROTECTED] wrote:
I was getting ready to checkin the rowid-versus-fts2 fix, and wanted
to add one last bit, to upgrade older tables.
Unfortunately, code of the form:
ALTER TABLE x_segments ADD id INTEGER
Scott Hess [EMAIL PROTECTED] wrote:
It appears that you can set
PRAGMA writable_schema=ON;
Then do a manual UPDATE of the sqlite_master table to insert
an id INTEGER PRIMARY KEY into the SQL for the table definition.
I tried it and it seems to work. But it is dangerous. If you
:[EMAIL PROTECTED]
Sent: Tuesday, August 14, 2007 8:22 PM
To: [EMAIL PROTECTED]
Cc: sqlite-users@sqlite.org
Subject: Re: [sqlite] ALTER TABLE and INTEGER PRIMARY KEY.
On 8/14/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Scott Hess [EMAIL PROTECTED] wrote:
I was getting ready to checkin the rowid
Folks.
I had been struggling to implement ALTER TABLE ADD COLUMN in my app
to change the database structure. However I would continuously face a
locked database error.
After much experimentation I have come to a very very strange conclusion.
In my app if I do this:
-start app
-open
On 6/3/07, Mark Gilbert [EMAIL PROTECTED] wrote:
Anyone have *any* idea what is happening ?
I don't know nothing about MacOS, but you may want to check the result
of sqlite3_close. It's possible it's not closing the database [1].
Regards,
~Nuno Lucas
[1]
Is there a reason why ALTER TABLE ADD can add only one column?
I'v changed the parser to allow any number of columns - I'm calling
sqlite3AlterFinishAddColumn() for every column. It seems to work.
Am I missing some problem, or nobody wanted more columns before?
Wiktor Adamski
Hi all,
Any body knows how to use ADD [COLUMN] in alter table command? I want
to add a new field to my table. Can modify be used with alter command
as in SQL?
The information contained in, or attached to, this e-mail, contains
confidential information and is intended solely for the use of
http://www.sqlite.org/faq.html#q13
Hi, SQLite FAQ recommends creating temp tables and copying the data from the
original table into it then deleting the old table then recreating the old
table (with the desired new column) then copying the data back and deleting
the temp table.
On 19/06/06,
Assuming a schema like:
create table t1 (a,b);
Add another column, c
alter table t1 add column c;
-Clark
- Original Message
From: Anish Enos Mathew [EMAIL PROTECTED]
To: sqlite-users@sqlite.org
Sent: Monday, June 19, 2006 12:42:46 AM
Subject: [sqlite] ALTER table command
Hi all
I asked a similar question to this about accessing columns using a
variable name, and the answer was you cannot. Sadly I cannot find the
email explaining why so I'll ask this similar question:
Can I add a column using a variable for the column name? Below is the
prepare statement, which
Kevin Piciulo wrote:
Can I add a column using a variable for the column name? Below is
the prepare statement, which is returning an error.
sqlite3_prepare(m_dbDataBase, ALTER TABLE users ADD COLUMN ?
varchar;, -1, stmt, NULL);
I'm pretty sure my syntax is correct which leads me to
The workaround would be to build the statement some other way
(sqlite3_mprintf(), for example) for each individual ALTER TABLE command.
At that point you may want to use sqlite3_exec() instead of
sqlite3_prepare(), depending on how you'll be using the statement. You'll
also have to be more
( name );
sqlite alter table x1 add column ( phone );
SQL error: near alter: syntax error
sqlite
.help for instructions
sqlite create table x1 ( name );
sqlite alter table x1 add column ( phone );
SQL error: near alter: syntax error
sqlite
There's no alter table statement in Sqlite v2.x;
switch to v3 if you need it.
Regards
Hi,
I was just playing with ALTER TABLE, and it appears that you can only add 1
column with each command. Is this correct? If so, how hard would it be to
enable adding multiple columns with the same command?
Thanks,
Robert Foster
General Manager
Mountain Visions P/L
The docs are correct; you just have to read carefully.
They say that you can rename, or add a new column to,
an existing table.
Regards
On 27/07/2005, at 13:04, Kurt Welgehausen wrote:
The docs are correct; you just have to read carefully.
I have :-)
They say that you can rename, or add a new column to,
an existing table.
No, it doesn't.
It states that you can rename or add a new column to an existing
table.
Regards,
On May 7, 2005, at 3:14 PM, Kurt Welgehausen wrote:
SQLite's version of the ALTER TABLE command allows the user to
rename, or add a new column to, an existing table.
Aha. Ok. I get it now :)
I can crash sqlite3 like this:
% cat test.sql
create table a (id INTEGER PRIMARY KEY);
alter table a add column f1 TEXT;
alter table a add column f2 TEXT;
alter table a add column f3 TEXT;
alter table a add column f4 TEXT;
alter table a add column f5 TEXT;
alter table a add column f6 TEXT;
alter
On Tue, 2005-03-29 at 03:13 -0800, Andy Lutomirski wrote:
I can crash sqlite3 like this:
% cat test.sql
create table a (id INTEGER PRIMARY KEY);
alter table a add column f1 TEXT;
alter table a add column f2 TEXT;
alter table a add column f3 TEXT;
alter table a add column f4 TEXT;
alter
Well, please allow me to congratulate to the release of 3.2.0 and many
thanks to you guys!
I was wondering whether it might be ALTER TABLE DROP/RENAME COLUMN in next
release?
_
MSN Messenger:
http://messenger.msn.com/cn
What I want to do is drop and add columns, couldn't find something
appropriate with sqlite, atleast it doesn't seem as ALTER TABLE works, how
can I do it instead?
Maybe it isn't possible?
_
Express yourself instantly with MSN
On 6 ene 2005, at 18:01, aleks ponjavic wrote:
What I want to do is drop and add columns, couldn't find something
appropriate with sqlite, atleast it doesn't seem as ALTER TABLE works,
how can I do it instead?
Maybe it isn't possible?
Please check the archives. It's been discussed already:
Does anyone know if there are any plans for an ALTER TABLE statement?
Not having it is a major issue in possibly adopting SQLite, as my boss
feels that he can't easily alter the database with a GUI tool (the ones
I've seen for SQLite don't handle it
Thanks.
Richard Boehme
Perhaps you search these examples ???
-Inserire una nuova colonna nel database (esempio completo).
ATTENZIONE FARE PRIMA UNA COPIA DEL FILE-DATABASE
sqlite prova
#Crea una tabella
sqlite create table t1(a text, b text);
#Inizia la transazione
sqlite BEGIN TRANSACTION;
#Crea una tabella temporanea
I've implemented this sintax with few options on my PHP Class, if you're
interested in syntax like this:
ALTER TABLE tbl_name ADD column_name alter_specification [FIRST | AFTER
column_name]
or this:
ALTER TABLE tbl_name DROP [COLUMN] col_name
tell me.
andr3a
- Original Message -
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