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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 |
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| sql | ||
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| connection.c | ||
| deparse.c | ||
| Makefile | ||
| option.c | ||
| postgres_fdw--1.0.sql | ||
| postgres_fdw.c | ||
| postgres_fdw.control | ||
| postgres_fdw.h | ||
| shippable.c | ||