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From: jian he <jian.universality@gmail.com>
Date: Thu, 5 Jun 2025 15:16:34 +0800
Message-ID: 
 <CACJufxHHnJm6Jb2YQpuRU1RX__tO=JJNJ5=EUMuzif_KNxGd9A@mail.gmail.com>
Subject: Re: Add SPLIT PARTITION/MERGE PARTITIONS commands
To: Dmitry Koval <d.koval@postgrespro.ru>
Cc: pgsql-hackers@lists.postgresql.org,
	Alexander Korotkov <aekorotkov@gmail.com>
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Archived-At: 
 <https://www.postgresql.org/message-id/CACJufxHHnJm6Jb2YQpuRU1RX__tO%3DJJNJ5%3DEUMuzif_KNxGd9A%40mail.gmail.com>
Precedence: bulk

hi.
bug in transformPartitionCmdForMerge "equal(name, name2))"

+static void
+transformPartitionCmdForMerge(CreateStmtContext *cxt, PartitionCmd *partcmd)
+{
+
+
+ foreach(listptr, partcmd->partlist)
+ {
+ RangeVar   *name = (RangeVar *) lfirst(listptr);
+
+ /* Partitions in the list should have different names. */
+ for_each_cell(listptr2, partcmd->partlist, lnext(partcmd->partlist, listptr))
+ {
+ RangeVar   *name2 = (RangeVar *) lfirst(listptr2);
+
+ if (equal(name, name2))
+ ereport(ERROR,
+ errcode(ERRCODE_DUPLICATE_TABLE),
+ errmsg("partition with name \"%s\" is already used", name->relname),
+ parser_errposition(cxt->pstate, name2->location));
+ }


ALTER TABLE sales_range MERGE PARTITIONS (sales_feb2022,
public.sales_feb2022) INTO sales_feb_mar2022;
ERROR:  lower bound of partition "sales_feb2022" conflicts with upper
bound of previous partition "sales_feb2022"
in this context. "sales_feb2022" is the same as "public.sales_feb2022".