database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-14 18:42:34 +03:00
Code Activity

Tweak accumArrayResult() to double the size of its working arrays when

Browse Source 
more space is needed, instead of incrementing by a fixed amount; the old
method wastes lots of space and time when the ultimate size is large.
Per gripe from Tatsuo.
This commit is contained in:
Tom Lane
2006-11-08 19:24:38 +00:00
parent a5cf12e2ef
commit fc5eb3f69a
2 changed files with 11 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/include/utils/array.h
View File

@ -49,7 +49,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/array.h,v 1.59 2006/09/10 20:14:20 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/array.h,v 1.60 2006/11/08 19:24:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -78,13 +78,8 @@ typedef struct ArrayBuildState
MemoryContext mcontext; /* where all the temp stuff is kept */
Datum *dvalues; /* array of accumulated Datums */
bool *dnulls; /* array of is-null flags for Datums */
/*
* The allocated size of dvalues[] and dnulls[] is always a multiple of
* ARRAY_ELEMS_CHUNKSIZE
*/
#define ARRAY_ELEMS_CHUNKSIZE 64
int nelems; /* number of valid Datums in dvalues[] */
int alen; /* allocated length of above arrays */
int nelems; /* number of valid entries in above arrays */
Oid element_type; /* data type of the Datums */
int16 typlen; /* needed info about datatype */
bool typbyval;