diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index 5f2a4a75dab..ef6753e31ad 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -1025,6 +1025,11 @@ typedef struct RangeTblEntry * from the catalogs if 'relid' was supplied, but we'd still need these * for TupleDesc-based ENRs, so we might as well always store the type * info here). + * + * For ENRs only, we have to consider the possibility of dropped columns. + * A dropped column is included in these lists, but it will have zeroes in + * all three lists (as well as an empty-string entry in eref). Testing + * for zero coltype is the standard way to detect a dropped column. */ List *coltypes; /* OID list of column type OIDs */ List *coltypmods; /* integer list of column typmods */ |