From 12afc7145c03c212f26fea3a99e016da6a1c919c Mon Sep 17 00:00:00 2001 From: Alvaro Herrera Date: Wed, 7 Aug 2019 12:27:47 -0400 Subject: Add comment on no default partition with hash partitioning Discussion: https://postgr.es/m/20190806222735.GA9535@alvherre.pgsql --- src/backend/parser/parse_utilcmd.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/backend/parser/parse_utilcmd.c') diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c index a9b2f8bacd8..6e5768c66cf 100644 --- a/src/backend/parser/parse_utilcmd.c +++ b/src/backend/parser/parse_utilcmd.c @@ -3727,6 +3727,12 @@ transformPartitionBound(ParseState *pstate, Relation parent, if (spec->is_default) { + /* + * Hash partitioning does not support a default partition; there's no + * use case for it (since the set of partitions to create is perfectly + * defined), and if users do get into it accidentally, it's hard to + * back out from it afterwards. + */ if (strategy == PARTITION_STRATEGY_HASH) ereport(ERROR, (errcode(ERRCODE_INVALID_TABLE_DEFINITION), -- cgit v1.2.3