diff options
| author | Tom Lane | 2000-07-17 03:05:41 +0000 |
|---|---|---|
| committer | Tom Lane | 2000-07-17 03:05:41 +0000 |
| commit | bec98a31c55a4f799b398d01541e68d7c086bb81 (patch) | |
| tree | 14924bb5da2bc0a0f9bfac1aa5b32256fd996b9c /src/include/nodes | |
| parent | 139f19c30221968e7d3bf64fe303cb41517e4601 (diff) | |
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/include/nodes')
| -rw-r--r-- | src/include/nodes/primnodes.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index 6f675873cc8..2cf59ca50c2 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: primnodes.h,v 1.43 2000/06/12 19:40:49 momjian Exp $ + * $Id: primnodes.h,v 1.44 2000/07/17 03:05:27 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -301,10 +301,9 @@ typedef struct Iter * basetype - base type Oid of the aggregate (ie, input type) * aggtype - type Oid of final result of the aggregate * target - attribute or expression we are aggregating on - * usenulls - TRUE to accept null values as inputs * aggstar - TRUE if argument was really '*' - * aggdistinct - TRUE if arguments were labeled DISTINCT - * aggno - workspace for nodeAgg.c executor + * aggdistinct - TRUE if it's agg(DISTINCT ...) + * aggno - workspace for executor (see nodeAgg.c) * ---------------- */ typedef struct Aggref @@ -314,7 +313,6 @@ typedef struct Aggref Oid basetype; Oid aggtype; Node *target; - bool usenulls; bool aggstar; bool aggdistinct; int aggno; |