diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/catalog/pg_opclass.dat | 7 | ||||
| -rw-r--r-- | src/include/nodes/execnodes.h | 4 |
2 files changed, 9 insertions, 2 deletions
diff --git a/src/include/catalog/pg_opclass.dat b/src/include/catalog/pg_opclass.dat index 484727a2fcd..55b7f9ce9d5 100644 --- a/src/include/catalog/pg_opclass.dat +++ b/src/include/catalog/pg_opclass.dat @@ -91,8 +91,11 @@ # Here's an ugly little hack to save space in the system catalog indexes. # btree doesn't ordinarily allow a storage type different from input type; # but cstring and name are the same thing except for trailing padding, -# and we can safely omit that within an index entry. So we declare the -# btree opclass for name as using cstring storage type. +# so we choose to omit that within an index entry. Here we declare the +# btree opclass for name as using cstring storage type. This does require +# that we pad the cstring out with the full NAMEDATALEN bytes when performing +# index-only scans. See corresponding hacks in ExecInitIndexOnlyScan() and +# StoreIndexTuple(). { opcmethod => 'btree', opcname => 'name_ops', opcfamily => 'btree/text_ops', opcintype => 'name', opckeytype => 'cstring' }, diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index c8286cc4f38..8d1566e8d4c 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -1546,6 +1546,8 @@ typedef struct IndexScanState * TableSlot slot for holding tuples fetched from the table * VMBuffer buffer in use for visibility map testing, if any * PscanLen size of parallel index-only scan descriptor + * NameCStringAttNums attnums of name typed columns to pad to NAMEDATALEN + * NameCStringCount number of elements in the NameCStringAttNums array * ---------------- */ typedef struct IndexOnlyScanState @@ -1565,6 +1567,8 @@ typedef struct IndexOnlyScanState TupleTableSlot *ioss_TableSlot; Buffer ioss_VMBuffer; Size ioss_PscanLen; + AttrNumber *ioss_NameCStringAttNums; + int ioss_NameCStringCount; } IndexOnlyScanState; /* ---------------- |