On Mon, Apr 19, 2021 at 5:13 PM Prabhat Sahu <prabhat.sahu@enterprisedb.com> wrote: > > Hi All, > > Please help me out with my doubt in RANGE partition with TEXT datatype: > > postgres=# create table tab1 (col1 text) PARTITION BY RANGE (col1); > CREATE TABLE > > postgres=# create table p1 (col1 text); > CREATE TABLE > > -- Partition with range from '5' to '10' shows error: > postgres=# alter table tab1 attach partition p1 for values from ('5') to ('10'); > ERROR: empty range bound specified for partition "p1" > LINE 1: ...r table tab1 attach partition p1 for values from ('5') to ('... > ^ > DETAIL: Specified lower bound ('5') is greater than or equal to upper bound ('10'). > > -- Whereas, partition with range from '5' to '9' is working fine as below: > postgres=# alter table tab1 attach partition p1 for values from ('5') to ('9'); > ALTER TABLE
Well, that is how comparing text values works. If you are expecting the comparisons to follow numerical rules, use a numeric data type.
> If this behavior is expected, Kindly let me know, how to represent the range from '5' to '10' with text datatype column?
Don't know why you want to use the text type for the column and these particular values for the partitions bounds, but one workaround would be to use '05' instead of '5'.
While testing on some PG behavior, I came across such a scenario/doubt.
