On Mon, Jul 24, 2017 at 11:23 AM, Amit Khandekar <amitdkhan...@gmail.com> wrote:
> > Attached update-partition-key_v13.patch now contains this > make_resultrels_ordered.patch changes. > > I have applied attach patch and got below observation. Observation : if join producing multiple output rows for a given row to be modified. I am seeing here it is updating a row and also inserting rows in target table. hence after update total count of table got incremented. below are steps: postgres=# create table part_upd (a int, b int) partition by range(a); CREATE TABLE postgres=# create table part_upd1 partition of part_upd for values from (minvalue) to (-10); CREATE TABLE postgres=# create table part_upd2 partition of part_upd for values from (-10) to (0); CREATE TABLE postgres=# create table part_upd3 partition of part_upd for values from (0) to (10); CREATE TABLE postgres=# create table part_upd4 partition of part_upd for values from (10) to (maxvalue); CREATE TABLE postgres=# insert into part_upd select i,i from generate_series(-30,30,3)i; INSERT 0 21 *postgres=# select count(*) from part_upd; count ------- 21(1 row)* postgres=# postgres=# create table non_part_upd (a int); CREATE TABLE postgres=# insert into non_part_upd select i%2 from generate_series(-30,30,5)i; INSERT 0 13 postgres=# update part_upd t1 set a = (t2.a+10) from non_part_upd t2 where t2.a = t1.b; UPDATE 7 *postgres=# select count(*) from part_upd; count ------- 27(1 row)* postgres=# select tableoid::regclass,* from part_upd; tableoid | a | b -----------+-----+----- part_upd1 | -30 | -30 part_upd1 | -27 | -27 part_upd1 | -24 | -24 part_upd1 | -21 | -21 part_upd1 | -18 | -18 part_upd1 | -15 | -15 part_upd1 | -12 | -12 part_upd2 | -9 | -9 part_upd2 | -6 | -6 part_upd2 | -3 | -3 part_upd3 | 3 | 3 part_upd3 | 6 | 6 part_upd3 | 9 | 9 part_upd4 | 12 | 12 part_upd4 | 15 | 15 part_upd4 | 18 | 18 part_upd4 | 21 | 21 part_upd4 | 24 | 24 part_upd4 | 27 | 27 part_upd4 | 30 | 30 * part_upd4 | 10 | 0 part_upd4 | 10 | 0 part_upd4 | 10 | 0 part_upd4 | 10 | 0 part_upd4 | 10 | 0 part_upd4 | 10 | 0 part_upd4 | 10 | 0*(27 rows) Thanks & Regards, Rajkumar Raghuwanshi QMG, EnterpriseDB Corporation
