On 2019/9/5 15:09, Pavel Stehule wrote:
čt 5. 9. 2019 v 8:39 odesílatel Quan Zongliang
<zongliang.q...@postgresdata.com
<mailto:zongliang.q...@postgresdata.com>> napsal:
Dear hackers,
I found that such a statement would get 0 in PL/pgSQL.
PREPARE smt_del(int) AS DELETE FROM t1;
EXECUTE 'EXECUTE smt_del(100)';
GET DIAGNOSTICS j = ROW_COUNT;
In fact, this is a problem with SPI, it does not support getting result
of the EXECUTE command. I made a little enhancement. Support for the
number of rows processed when executing INSERT/UPDATE/DELETE statements
dynamically.
Is there some use case for support this feature?
A user deletes the data in PL/pgSQL using the above method, hoping to do
more processing according to the number of rows affected, and found that
each time will get 0.
Sample code:
PREPARE smt_del(int) AS DELETE FROM t1 WHERE c=$1;
EXECUTE 'EXECUTE smt_del(100)';
GET DIAGNOSTICS j = ROW_COUNT;
IF j=1 THEN
do something
ELSIF j=0 THEN
do something
Here j is always equal to 0.
Regards
Regards
Pavel
Regards,
Quan Zongliang
