diff options
| author | Hiroshi Inoue | 2000-03-09 05:00:26 +0000 |
|---|---|---|
| committer | Hiroshi Inoue | 2000-03-09 05:00:26 +0000 |
| commit | fd9ff86bd9c4f1a96f3796212212b4099ca275de (patch) | |
| tree | db51e5e26579069c839261a7c6d21a3b329d0c3b /src/include | |
| parent | 6513946cbbb0b06a9d764900a6db8ff88578f65c (diff) | |
Trial implementation of ALTER DROP COLUMN.
They are #ifdef'd.
Add -D_DROP_COLUMN_HACK__ compile option
to evaluate it.
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/catalog/pg_attribute.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/include/catalog/pg_attribute.h b/src/include/catalog/pg_attribute.h index d7a1adb1c6..54f3adc9ee 100644 --- a/src/include/catalog/pg_attribute.h +++ b/src/include/catalog/pg_attribute.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: pg_attribute.h,v 1.53 2000/01/26 05:57:57 momjian Exp $ + * $Id: pg_attribute.h,v 1.54 2000/03/09 05:00:26 inoue Exp $ * * NOTES * the genbki.sh script reads this file and generates .bki @@ -178,6 +178,20 @@ typedef FormData_pg_attribute *Form_pg_attribute; #define Anum_pg_attribute_atthasdef 15 +#ifdef _DROP_COLUMN_HACK__ +/* + * CONSTANT and MACROS for DROP COLUMN implementation + */ +#define DROP_COLUMN_OFFSET -20 +#define COLUMN_IS_DROPPED(attribute) ((attribute)->attnum <= DROP_COLUMN_OFFSET) +#define DROPPED_COLUMN_INDEX(attidx) (DROP_COLUMN_OFFSET - attidx) +#define ATTRIBUTE_DROP_COLUMN(attribute) \ + Assert((attribute)->attnum > 0); \ + (attribute)->attnum = DROPPED_COLUMN_INDEX((attribute)->attnum); \ + (attribute)->atttypid = (Oid) -1; \ + (attribute)->attnotnull = false; \ + (attribute)->atthasdef = false; +#endif /* _DROP_COLUMN_HACK__ */ /* ---------------- * SCHEMA_ macros for declaring hardcoded tuple descriptors. * these are used in utils/cache/relcache.c |