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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2000-07-17 03:05:41 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2000-07-17 03:05:41 +0000 |
| commit | bec98a31c55a4f799b398d01541e68d7c086bb81 (patch) | |
| tree | 14924bb5da2bc0a0f9bfac1aa5b32256fd996b9c /src/backend/executor/nodeHash.c | |
| parent | 139f19c30221968e7d3bf64fe303cb41517e4601 (diff) | |
| download | postgresql-bec98a31c55a4f799b398d01541e68d7c086bb81.tar.gz postgresql-bec98a31c55a4f799b398d01541e68d7c086bb81.zip | |
Revise aggregate functions per earlier discussions in pghackers.
There's now only one transition value and transition function.
NULL handling in aggregates is a lot cleaner. Also, use Numeric
accumulators instead of integer accumulators for sum/avg on integer
datatypes --- this avoids overflow at the cost of being a little slower.
Implement VARIANCE() and STDDEV() aggregates in the standard backend.
Also, enable new LIKE selectivity estimators by default. Unrelated
change, but as long as I had to force initdb anyway...
Diffstat (limited to 'src/backend/executor/nodeHash.c')
| -rw-r--r-- | src/backend/executor/nodeHash.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/backend/executor/nodeHash.c b/src/backend/executor/nodeHash.c index 9c2d293858c..f63ffe49435 100644 --- a/src/backend/executor/nodeHash.c +++ b/src/backend/executor/nodeHash.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * - * $Id: nodeHash.c,v 1.49 2000/07/12 02:37:03 tgl Exp $ + * $Id: nodeHash.c,v 1.50 2000/07/17 03:04:53 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -30,6 +30,8 @@ #include "miscadmin.h" #include "parser/parse_expr.h" #include "parser/parse_type.h" +#include "utils/memutils.h" + static int hashFunc(Datum key, int len, bool byVal); |