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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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8
src/backend/executor/nodeIndexscan.c
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@ -1144,7 +1144,9 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
Expr *leftop; /* expr on lhs of operator */
Expr *rightop; /* expr on rhs ... */
AttrNumber varattno; /* att number used in scan */
int indnkeyatts;
indnkeyatts = IndexRelationGetNumberOfKeyAttributes(index);
if (IsA(clause, OpExpr))
{
/* indexkey op const or indexkey op expression */
@ -1169,7 +1171,7 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
elog(ERROR, "indexqual doesn't have key on left side");
varattno = ((Var *) leftop)->varattno;
if (varattno < 1 || varattno > index->rd_index->indnatts)
if (varattno < 1 || varattno > indnkeyatts)
elog(ERROR, "bogus index qualification");
/*
@ -1292,7 +1294,7 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
opnos_cell = lnext(opnos_cell);
if (index->rd_rel->relam != BTREE_AM_OID ||
varattno < 1 || varattno > index->rd_index->indnatts)
varattno < 1 || varattno > indnkeyatts)
elog(ERROR, "bogus RowCompare index qualification");
opfamily = index->rd_opfamily[varattno - 1];
@ -1413,7 +1415,7 @@ ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
elog(ERROR, "indexqual doesn't have key on left side");
varattno = ((Var *) leftop)->varattno;
if (varattno < 1 || varattno > index->rd_index->indnatts)
if (varattno < 1 || varattno > indnkeyatts)
elog(ERROR, "bogus index qualification");
/*