diff options
| author | Álvaro Herrera <alvherre@kurilemu.de> | 2026-01-21 20:06:01 +0100 |
|---|---|---|
| committer | Álvaro Herrera <alvherre@kurilemu.de> | 2026-01-21 20:06:01 +0100 |
| commit | 4d6a66f675815a5d40a650d4dcfb5ddb89c6ad2f (patch) | |
| tree | 37bc0eae0dae62dc4ed2011b3e2bc0b3cc78d5a2 /src/include/postgres.h | |
| parent | cec5fe0d1e192b3b0005063011f113ac99f6908c (diff) | |
Allow Boolean reloptions to have ternary values
From the user's point of view these are just Boolean values; from the
implementation side we can now distinguish an option that hasn't been
set. Reimplement the vacuum_truncate reloption using this type.
This could also be used for reloptions vacuum_index_cleanup and
buffering, but those additionally need a per-option "alias" for the
state where the variable is unset (currently the value "auto").
Author: Nikolay Shaplov <dhyan@nataraj.su>
Reviewed-by: Timur Magomedov <t.magomedov@postgrespro.ru>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Discussion: https://postgr.es/m/3474141.usfYGdeWWP@thinkpad-pgpro
Diffstat (limited to 'src/include/postgres.h')
| -rw-r--r-- | src/include/postgres.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/include/postgres.h b/src/include/postgres.h index 7d93fbce709..8b92f453e7a 100644 --- a/src/include/postgres.h +++ b/src/include/postgres.h @@ -544,6 +544,20 @@ Float8GetDatum(float8 X) */ /* + * pg_ternary + * Boolean value with an extra "unset" value + * + * This enum can be used for values that want to distinguish between true, + * false, and unset. +*/ +typedef enum pg_ternary +{ + PG_TERNARY_FALSE = 0, + PG_TERNARY_TRUE = 1, + PG_TERNARY_UNSET = -1 +} pg_ternary; + +/* * NON_EXEC_STATIC: It's sometimes useful to define a variable or function * that is normally static but extern when using EXEC_BACKEND (see * pg_config_manual.h). There would then typically be some code in |