database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-12-21 05:21:08 +03:00
Code Activity

Use 128-bit math to accelerate some aggregation functions.

Browse Source 
On platforms where we support 128bit integers, use them to implement
faster transition functions for sum(int8), avg(int8),
var_*(int2/int4),stdev_*(int2/int4). Where not supported continue to use
numeric as a transition type.

In some synthetic benchmarks this has been shown to provide significant
speedups.

Bumps catversion.

Discussion: 544BB5F1.50709@proxel.se
Author: Andreas Karlsson
Reviewed-By: Peter Geoghegan, Petr Jelinek, Andres Freund,
    Oskari Saarenmaa, David Rowley
This commit is contained in:
Andres Freund
2015-03-20 10:26:17 +01:00
parent 8122e1437e
commit 959277a4f5
5 changed files with 463 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/include/utils/builtins.h
View File

@@ -1027,6 +1027,12 @@ extern Datum numeric_var_pop(PG_FUNCTION_ARGS);
extern Datum numeric_var_samp(PG_FUNCTION_ARGS);
extern Datum numeric_stddev_pop(PG_FUNCTION_ARGS);
extern Datum numeric_stddev_samp(PG_FUNCTION_ARGS);
extern Datum numeric_poly_sum(PG_FUNCTION_ARGS);
extern Datum numeric_poly_avg(PG_FUNCTION_ARGS);
extern Datum numeric_poly_var_pop(PG_FUNCTION_ARGS);
extern Datum numeric_poly_var_samp(PG_FUNCTION_ARGS);
extern Datum numeric_poly_stddev_pop(PG_FUNCTION_ARGS);
extern Datum numeric_poly_stddev_samp(PG_FUNCTION_ARGS);
extern Datum int2_sum(PG_FUNCTION_ARGS);
extern Datum int4_sum(PG_FUNCTION_ARGS);
extern Datum int8_sum(PG_FUNCTION_ARGS);
@@ -1034,6 +1040,7 @@ extern Datum int2_avg_accum(PG_FUNCTION_ARGS);
extern Datum int4_avg_accum(PG_FUNCTION_ARGS);
extern Datum int2_avg_accum_inv(PG_FUNCTION_ARGS);
extern Datum int4_avg_accum_inv(PG_FUNCTION_ARGS);
extern Datum int8_avg_accum_inv(PG_FUNCTION_ARGS);
extern Datum int8_avg(PG_FUNCTION_ARGS);
extern Datum int2int4_sum(PG_FUNCTION_ARGS);
extern Datum width_bucket_numeric(PG_FUNCTION_ARGS);