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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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9
src/backend/commands/tablecmds.c
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@ -5234,7 +5234,7 @@ ATExecDropNotNull(Relation rel, const char *colName, LOCKMODE lockmode)
* Loop over each attribute in the primary key and see if it
* matches the to-be-altered attribute
*/
for (i = 0; i < indexStruct->indnatts; i++)
for (i = 0; i < indexStruct->indnkeyatts; i++)
{
if (indexStruct->indkey.values[i] == attnum)
ereport(ERROR,
@ -6576,6 +6576,7 @@ ATAddForeignKeyConstraint(AlteredTableInfo *tab, Relation rel,
RelationGetRelid(rel),
fkattnum,
numfks,
numfks,
InvalidOid, /* not a domain
* constraint */
indexOid,
@ -7083,7 +7084,7 @@ transformFkeyGetPrimaryKey(Relation pkrel, Oid *indexOid,
* assume a primary key cannot have expressional elements)
*/
*attnamelist = NIL;
for (i = 0; i < indexStruct->indnatts; i++)
for (i = 0; i < indexStruct->indnkeyatts; i++)
{
int pkattno = indexStruct->indkey.values[i];
@ -7161,7 +7162,7 @@ transformFkeyCheckAttrs(Relation pkrel,
* partial index; forget it if there are any expressions, too. Invalid
* indexes are out as well.
*/
if (indexStruct->indnatts == numattrs &&
if (indexStruct->indnkeyatts == numattrs &&
indexStruct->indisunique &&
IndexIsValid(indexStruct) &&
heap_attisnull(indexTuple, Anum_pg_index_indpred) &&
@ -11045,7 +11046,7 @@ ATExecReplicaIdentity(Relation rel, ReplicaIdentityStmt *stmt, LOCKMODE lockmode
RelationGetRelationName(indexRel))));
/* Check index for nullable columns. */
for (key = 0; key < indexRel->rd_index->indnatts; key++)
for (key = 0; key < IndexRelationGetNumberOfKeyAttributes(indexRel); key++)
{
int16 attno = indexRel->rd_index->indkey.values[key];
Form_pg_attribute attr;