hcq/postgresql
1
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2026-02-14 18:37:03 +08:00
Code Issues Packages Projects Releases Wiki Activity

Generated columns

Browse Source 
This is an SQL-standard feature that allows creating columns that are
computed from expressions rather than assigned, similar to a view or
materialized view but on a column basis.

This implements one kind of generated column: stored (computed on
write).  Another kind, virtual (computed on read), is planned for the
future, and some room is left for it.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com
This commit is contained in:
Peter Eisentraut
2019-03-30 08:13:09 +01:00
parent 6b8b5364dd
commit fc22b6623b
84 changed files with 3067 additions and 157 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/include/parser/parse_node.h
View File

@ -71,7 +71,8 @@ typedef enum ParseExprKind
EXPR_KIND_PARTITION_BOUND, /* partition bound expression */
EXPR_KIND_PARTITION_EXPRESSION, /* PARTITION BY expression */
EXPR_KIND_CALL_ARGUMENT, /* procedure argument in CALL */
EXPR_KIND_COPY_WHERE /* WHERE condition in COPY FROM */
EXPR_KIND_COPY_WHERE, /* WHERE condition in COPY FROM */
EXPR_KIND_GENERATED_COLUMN, /* generation expression for a column */
} ParseExprKind;