From 8224de4f42ccf98e08db07b43d52fed72f962ebb Mon Sep 17 00:00:00 2001 From: Teodor Sigaev Date: Sat, 7 Apr 2018 23:00:39 +0300 Subject: Indexes with INCLUDE columns and their support in B-tree This patch introduces INCLUDE clause to index definition. This clause specifies a list of columns which will be included as a non-key part in the index. The INCLUDE columns exist solely to allow more queries to benefit from index-only scans. Also, such columns don't need to have appropriate operator classes. Expressions are not supported as INCLUDE columns since they cannot be used in index-only scans. Index access methods supporting INCLUDE are indicated by amcaninclude flag in IndexAmRoutine. For now, only B-tree indexes support INCLUDE clause. In B-tree indexes INCLUDE columns are truncated from pivot index tuples (tuples located in non-leaf pages and high keys). Therefore, B-tree indexes now might have variable number of attributes. This patch also provides generic facility to support that: pivot tuples contain number of their attributes in t_tid.ip_posid. Free 13th bit of t_info is used for indicating that. This facility will simplify further support of index suffix truncation. The changes of above are backward-compatible, pg_upgrade doesn't need special handling of B-tree indexes for that. Bump catalog version Author: Anastasia Lubennikova with contribition by Alexander Korotkov and me Reviewed by: Peter Geoghegan, Tomas Vondra, Antonin Houska, Jeff Janes, David Rowley, Alexander Korotkov Discussion: https://www.postgresql.org/message-id/flat/56168952.4010101@postgrespro.ru --- src/backend/commands/trigger.c | 1 + 1 file changed, 1 insertion(+) (limited to 'src/backend/commands/trigger.c') diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c index a189356cada..67f0b6c0ac9 100644 --- a/src/backend/commands/trigger.c +++ b/src/backend/commands/trigger.c @@ -742,6 +742,7 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString, RelationGetRelid(rel), NULL, /* no conkey */ 0, + 0, InvalidOid, /* no domain */ InvalidOid, /* no index */ InvalidOid, /* no foreign key */ -- cgit v1.2.3