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Assert that partition inherits from only one parent in MergeAttributes()

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A partition inherits only from one partitioned table and thus inherits
a column definition only once.  Assert the same in MergeAttributes()
and simplify a condition accordingly.

Similar definition exists about line 3068 in the same function.

Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAExHW5uOykuTC+C6R1yDSp=o8Q83jr8xJdZxgPkxfZ1Ue5RRGg@mail.gmail.com
This commit is contained in:
Peter Eisentraut 2024-01-16 08:57:35 +01:00
parent 58b20e6d75
commit d22d98c341
1 changed files with 8 additions and 5 deletions
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13
src/backend/commands/tablecmds.c
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@ -2721,6 +2721,12 @@ MergeAttributes(List *columns, const List *supers, char relpersistence,
int32 deftypmod;
Oid defCollId;
/*
* Partitions have only one parent and have no column
* definitions of their own, so conflict should never occur.
*/
Assert(!is_partition);
/*
* Yes, try to merge the two column definitions.
*/
@ -2792,12 +2798,9 @@ MergeAttributes(List *columns, const List *supers, char relpersistence,
/*
* In regular inheritance, columns in the parent's primary key
* get an extra not-null constraint. Partitioning doesn't
* need this, because the PK itself is going to be cloned to
* the partition.
* get an extra not-null constraint.
*/
if (!is_partition &&
bms_is_member(parent_attno - FirstLowInvalidHeapAttributeNumber,
if (bms_is_member(parent_attno - FirstLowInvalidHeapAttributeNumber,
pkattrs))
{
CookedConstraint *nn;