Can you have a transaction block in a routine?












0















I'm trying to create a routine with has a transaction block, but the BEGIN statement of the routine conflicts with the begin statement of the transaction.
Is it possible to have a transaction inside a routine in postgres so if one statement fails, everything would rollback?



What I'm trying to do is something like this:



CREATE FUNCTION transfer_money_from_user_to_user(payer_id BIGINT, payee_id BIGINT)

RETURNS TABLE(id INTEGER)

LANGUAGE plpgsql

AS $$

  BEGIN

  /* transaction start */

  update user_money set user_money = user_money - 100 where user_money.id = payer_id;

  update user_money set user_money = user_money + 100 where user_money.id = payee_id;

  /* transaction end */

$$;


Thank you!






postgresql transactions routines







share|improve this question























  • you can only do this in procedures (not functions) available since postgres 11

    – a_horse_with_no_name
    Nov 19 '18 at 17:54
















0















I'm trying to create a routine with has a transaction block, but the BEGIN statement of the routine conflicts with the begin statement of the transaction.
Is it possible to have a transaction inside a routine in postgres so if one statement fails, everything would rollback?



What I'm trying to do is something like this:



CREATE FUNCTION transfer_money_from_user_to_user(payer_id BIGINT, payee_id BIGINT)

RETURNS TABLE(id INTEGER)

LANGUAGE plpgsql

AS $$

  BEGIN

  /* transaction start */

  update user_money set user_money = user_money - 100 where user_money.id = payer_id;

  update user_money set user_money = user_money + 100 where user_money.id = payee_id;

  /* transaction end */

$$;


Thank you!






postgresql transactions routines







share|improve this question























  • you can only do this in procedures (not functions) available since postgres 11

    – a_horse_with_no_name
    Nov 19 '18 at 17:54














0












0








0








I'm trying to create a routine with has a transaction block, but the BEGIN statement of the routine conflicts with the begin statement of the transaction.
Is it possible to have a transaction inside a routine in postgres so if one statement fails, everything would rollback?



What I'm trying to do is something like this:



CREATE FUNCTION transfer_money_from_user_to_user(payer_id BIGINT, payee_id BIGINT)

RETURNS TABLE(id INTEGER)

LANGUAGE plpgsql

AS $$

  BEGIN

  /* transaction start */

  update user_money set user_money = user_money - 100 where user_money.id = payer_id;

  update user_money set user_money = user_money + 100 where user_money.id = payee_id;

  /* transaction end */

$$;


Thank you!






postgresql transactions routines







share|improve this question














I'm trying to create a routine with has a transaction block, but the BEGIN statement of the routine conflicts with the begin statement of the transaction.
Is it possible to have a transaction inside a routine in postgres so if one statement fails, everything would rollback?



What I'm trying to do is something like this:



CREATE FUNCTION transfer_money_from_user_to_user(payer_id BIGINT, payee_id BIGINT)

RETURNS TABLE(id INTEGER)

LANGUAGE plpgsql

AS $$

  BEGIN

  /* transaction start */

  update user_money set user_money = user_money - 100 where user_money.id = payer_id;

  update user_money set user_money = user_money + 100 where user_money.id = payee_id;

  /* transaction end */

$$;


Thank you!






postgresql transactions routines




postgresql transactions routines






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 19 '18 at 17:13









TerumiTerumi

1201111




1201111













  • you can only do this in procedures (not functions) available since postgres 11

    – a_horse_with_no_name
    Nov 19 '18 at 17:54



















  • you can only do this in procedures (not functions) available since postgres 11

    – a_horse_with_no_name
    Nov 19 '18 at 17:54

















you can only do this in procedures (not functions) available since postgres 11

– a_horse_with_no_name
Nov 19 '18 at 17:54





you can only do this in procedures (not functions) available since postgres 11

– a_horse_with_no_name
Nov 19 '18 at 17:54












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