Begin block

Hello,

I'm very much a Postgres PHP novice. I have a number of queries that
need to be run as a single transaction. One set of those will only be
run some of the time, but other times will need to be imbedded in
another block. Can I imbed a begin/commit inside another begin/commit?

Thanks,
Carol

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Re: Begin block

On 01/07/2009 18:52, Carol Walter wrote:
> Hello,
>
> I'm very much a Postgres PHP novice. I have a number of queries that
> need to be run as a single transaction. One set of those will only be
> run some of the time, but other times will need to be imbedded in
> another block. Can I imbed a begin/commit inside another begin/commit?

Hi there,

I'm not sure about nested transactions, but you can achieve the same
effect with savepoints:

http://www.postgresql.org/docs/8.4/static/sql-savepoint.html

HTH,

Ray.

------------------------------------------------------------ ------
Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
rod@iol.ie
Galway Cathedral Recitals: http://www.galwaycathedral.org/recitals
------------------------------------------------------------ ------

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Re: Begin block

> I'm very much a Postgres PHP novice. I have a number of=20
> queries that need to be run as a single transaction. One set=20
> of those will only be run some of the time, but other times=20
> will need to be imbedded in another block. Can I imbed a=20
> begin/commit inside another begin/commit?
>=20


Nested transactions are not allowed in Postgresql you must use
savepoints.

Nick

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Re: Begin block

On 2009-07-01, Carol Walter wrote:
> Hello,
>
> I'm very much a Postgres PHP novice. I have a number of queries that
> need to be run as a single transaction. One set of those will only be
> run some of the time, but other times will need to be imbedded in
> another block. Can I imbed a begin/commit inside another begin/commit?

No, but perhaps you can fake it using savepoints.

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