Online system & transactions

Hello ppl,

Imagine some online system, based on PgSql. There are 'many' parts which
depends on each other. I will give small example, but instead of simple
table imagine changing tenths various tables (editing). So, 'change table A'
can be work for hours.

There are tables tableA and tableB. Changes are made by thin client. If
you change tableA, you have to also change tableB to 'finish' operation.
Between starting changing tableA until tableB is finished, data are 'not
valid'. Record may be changes, deleted, inserted, whatever.

Is there any simple way, how to create 'transactions' over database
connections ? These relations are really complex in real live and doesn't
fit table foundaries, so, it is basically not realistic to make it on
application layer and need to be done somehow on DB layer....

The best solution should be possibility to 'begin' transaction, 'store'
somehow on server, and next time, instead of begin new transaction return to
stored one. Transactions solves all these problems, but they don't work
across various/multiple connections....

Any ideas/references please ?
Thank you,

Best regards,
Lada 'Ray' Lostak
Unreal64 Develop group
http://www.orcave.com
http://www.unreal64.net

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