čt 25. 4. 2024 v 18:46 odesílatel Sasmit Utkarsh <utkarshsas...@gmail.com> napsal:
> Hi Pavel, > > Thanks for the info. But is it not possible to have some kind of handling > of an empty result set using libpq for the given procedure? > extension dblink uses libpq (to connect to other databases or servers). You can check code there https://github.com/postgres/postgres/blob/master/contrib/dblink/dblink.c Regards Pavel > > > Regards, > Sasmit Utkarsh > +91-7674022625 > > > On Thu, Apr 25, 2024 at 8:26 PM Pavel Stehule <pavel.steh...@gmail.com> > wrote: > >> Hi >> >> čt 25. 4. 2024 v 12:57 odesílatel Sasmit Utkarsh <utkarshsas...@gmail.com> >> napsal: >> >>> Hi PostgreSQL Team, >>> >>> I'm trying to execute the stored procedure(details along with the >>> program in the attachment) to fetch the records from the table for the >>> inputs given in the code as well. I have already created the procedure in >>> the db. But I see some strange output when I try to fetch the details from >>> the table using *PQexecPrepared*, even though there are no records for >>> the given input. I see that this message nTuples(rows)=1 along with >>> procedure successful execution. How to better handle this? >>> when it returned probably an empty result set. Please advise >>> >> >> PQ interface is designed for client server communication >> >> you should to use SPI API >> >> https://www.postgresql.org/docs/current/spi.html >> >> Regards >> >> Pavel >> >> >>> >>> *Output:* >>> >>> >>> >>> >>> >>> *sasmit@sasmit-Virtual-Machine:~/test$ ./test_proceduresmain() >>> Connection to shadow_shc_data database SUCCESSFULmain() nFields(cols)=2 >>> nTuples(rows)=1SELECT operation succeeded on Shadow DBmain() blk_size >>> returned is 7565871* >>> >>> *DB:* >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> *[nix-shell:/ext/shb/tpfasm/shares-c]$ psql shadow_shc_datapsql (14.9, >>> server 12.16 (Ubuntu 12.16-0ubuntu0.20.04.1))Type "help" for >>> help.shadow_shc_data=# select * from fs_data;shadow_shc_data=# CALL >>> SQL_select_data_procedure(-335509949,false , NULL, NULL); blksize | >>> fadata---------+-------- |(1 row)* >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> *shadow_shc_data-# \dfList of functions-[ RECORD 1 >>> ]-------+-----------------------------------------------------------------------------------------------------------------Schema >>> | publicName | sql_insert_data_procedureResult >>> data type |Argument data types | fa integer, ft integer, ord integer, >>> xaddr text, recid text, blk_size integer, indata bytea, INOUT outdata >>> byteaType | proc-[ RECORD 2 >>> ]-------+-----------------------------------------------------------------------------------------------------------------Schema >>> | publicName | sql_select_data_procedureResult >>> data type |Argument data types | fa integer, hold boolean, INOUT blksize >>> integer, INOUT fadata byteaType | proc-[ RECORD 3 >>> ]-------+-----------------------------------------------------------------------------------------------------------------Schema >>> | publicName | sql_update_data_procedureResult >>> data type |Argument data types | indata bytea, unhold boolean, fa >>> integerType | proc* >>> >>> Regards, >>> Sasmit Utkarsh >>> +91-7674022625 >>> >>
