From: | Francisco Olarte <folarte(at)peoplecall(dot)com> |
---|---|
To: | M Tarkeshwar Rao <m(dot)tarkeshwar(dot)rao(at)ericsson(dot)com> |
Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Getting following error in using cursor to fetch the records from a large table in c language(current transaction is aborted, commands ignored until end of transaction block) |
Date: | 2019-11-01 17:08:09 |
Message-ID: | CA+bJJbxzLf+zrPJxemodg=gXinS8h=5X01POUSbJc25jhUL5Qw@mail.gmail.com |
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On Fri, Nov 1, 2019 at 1:44 PM M Tarkeshwar Rao
<m(dot)tarkeshwar(dot)rao(at)ericsson(dot)com> wrote:
> Getting following error in using cursor to fetch the records from a large table in c language.
Regarding this, "c language", I'll comment later....
> Can you please suggest why it is coming and what is the remedy for this.
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [10-1] < 2019-11-01 13:21:54.212 CET > ERROR: current transaction is aborted, commands ignored until end of transaction block
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [10-2] < 2019-11-01 13:21:54.212 CET > STATEMENT: BEGIN
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [11-1] < 2019-11-01 13:21:54.324 CET > ERROR: current transaction is aborted, commands ignored until end of transaction block
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [11-2] < 2019-11-01 13:21:54.324 CET > STATEMENT: BEGIN
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [12-1] < 2019-11-01 13:21:54.356 CET > ERROR: current transaction is aborted, commands ignored until end of transaction block
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [12-2] < 2019-11-01 13:21:54.356 CET > STATEMENT: BEGIN
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [13-1] < 2019-11-01 13:21:54.360 CET > ERROR: current transaction is aborted, commands ignored until end of transaction block
> Nov 1 13:21:54 sprintstd2 postgres[18604]: [13-2] < 2019-11-01 13:21:54.360 CET > STATEMENT
This seems incomplete, but I's telling you the cause. You had an
error, you need to terminate the transaction before issuing a new one,
i.e., do a commit ( which, IIRC, will rollback if the transaction is
in error ) or rollback.
> Sample Code snippet used
As you stated C I cannot comment too much, but notice:
> theCursorDec = (RWCString)"DECLARE " + mySqlCursor + " CURSOR FOR " + theSql;
> myFetchSql = "FETCH " + fetchStr + " IN " + mySqlCursor;
Neither of these are C, they COULD be C++
> // Begin the cursor
Same as this comment.
> PQexec(connection, ,"BEGIN"))
> PQexec(connection, ,"myFetchSql”)
And these are definitely not C ( no ; ) and, if you generated them by
editing, myfetchsql is quoted which smells fishy.
I won't comment more until you confirm that is the real code, but
anyway it seems to me you issue transaction start queries without
properly terminating them with a transaction end one.
Francisco Olarte
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