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CREATE INDEX ... INCLUDING (column[, ...])

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Now indexes (but only B-tree for now) can contain "extra" column(s) which
doesn't participate in index structure, they are just stored in leaf
tuples. It allows to use index only scan by using single index instead
of two or more indexes.

Author: Anastasia Lubennikova with minor editorializing by me
Reviewers: David Rowley, Peter Geoghegan, Jeff Janes
This commit is contained in:
Teodor Sigaev
2016-04-08 19:31:49 +03:00
parent 339025c68f
commit 386e3d7609
68 changed files with 1321 additions and 256 deletions
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26
contrib/dblink/dblink.c
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@ -100,7 +100,7 @@ static remoteConn *getConnectionByName(const char *name);
static HTAB *createConnHash(void);
static void createNewConnection(const char *name, remoteConn *rconn);
static void deleteConnection(const char *name);
static char **get_pkey_attnames(Relation rel, int16 *numatts);
static char **get_pkey_attnames(Relation rel, int16 *indnkeyatts);
static char **get_text_array_contents(ArrayType *array, int *numitems);
static char *get_sql_insert(Relation rel, int *pkattnums, int pknumatts, char **src_pkattvals, char **tgt_pkattvals);
static char *get_sql_delete(Relation rel, int *pkattnums, int pknumatts, char **tgt_pkattvals);
@ -1485,7 +1485,7 @@ PG_FUNCTION_INFO_V1(dblink_get_pkey);
Datum
dblink_get_pkey(PG_FUNCTION_ARGS)
{
int16 numatts;
int16 indnkeyatts;
char **results;
FuncCallContext *funcctx;
int32 call_cntr;
@ -1511,7 +1511,7 @@ dblink_get_pkey(PG_FUNCTION_ARGS)
rel = get_rel_from_relname(PG_GETARG_TEXT_P(0), AccessShareLock, ACL_SELECT);
/* get the array of attnums */
results = get_pkey_attnames(rel, &numatts);
results = get_pkey_attnames(rel, &indnkeyatts);
relation_close(rel, AccessShareLock);
@ -1531,9 +1531,9 @@ dblink_get_pkey(PG_FUNCTION_ARGS)
attinmeta = TupleDescGetAttInMetadata(tupdesc);
funcctx->attinmeta = attinmeta;
if ((results != NULL) && (numatts > 0))
if ((results != NULL) && (indnkeyatts > 0))
{
funcctx->max_calls = numatts;
funcctx->max_calls = indnkeyatts;
/* got results, keep track of them */
funcctx->user_fctx = results;
@ -2023,10 +2023,10 @@ dblink_fdw_validator(PG_FUNCTION_ARGS)
* get_pkey_attnames
*
* Get the primary key attnames for the given relation.
* Return NULL, and set numatts = 0, if no primary key exists.
* Return NULL, and set indnkeyatts = 0, if no primary key exists.
*/
static char **
get_pkey_attnames(Relation rel, int16 *numatts)
get_pkey_attnames(Relation rel, int16 *indnkeyatts)
{
Relation indexRelation;
ScanKeyData skey;
@ -2036,8 +2036,8 @@ get_pkey_attnames(Relation rel, int16 *numatts)
char **result = NULL;
TupleDesc tupdesc;
/* initialize numatts to 0 in case no primary key exists */
*numatts = 0;
/* initialize indnkeyatts to 0 in case no primary key exists */
*indnkeyatts = 0;
tupdesc = rel->rd_att;
@ -2058,12 +2058,12 @@ get_pkey_attnames(Relation rel, int16 *numatts)
/* we're only interested if it is the primary key */
if (index->indisprimary)
{
*numatts = index->indnatts;
if (*numatts > 0)
*indnkeyatts = index->indnkeyatts;
if (*indnkeyatts > 0)
{
result = (char **) palloc(*numatts * sizeof(char *));
result = (char **) palloc(*indnkeyatts * sizeof(char *));
for (i = 0; i < *numatts; i++)
for (i = 0; i < *indnkeyatts; i++)
result[i] = SPI_fname(tupdesc, index->indkey.values[i]);
}
break;