database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-12 21:01:52 +03:00
Code Activity

Major optimizer improvement for joining a large number of tables.

Browse Source
This commit is contained in:
Bruce Momjian
1999-02-09 03:51:42 +00:00
parent be948af2e8
commit fe35ffe7e0
21 changed files with 277 additions and 139 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
src/backend/nodes/readfuncs.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.50 1999/02/08 04:29:04 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.51 1999/02/09 03:51:13 momjian Exp $
*
* NOTES
* Most of the read functions for plan nodes are tested. (In fact, they
@ -37,6 +37,7 @@
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "catalog/pg_index.h"
#include "catalog/pg_type.h"
#include "nodes/primnodes.h"
@ -1450,6 +1451,54 @@ _readRowMark()
return local_node;
}
/* ----------------
* _readPathOrder
*
* PathOrder is part of Path and it's subclasses.
* ----------------
*/
static PathOrder *
_readPathOrder()
{
PathOrder *local_node;
char *token;
int length;
local_node = makeNode(PathOrder);
token = lsptok(NULL, &length); /* get :ordtype */
token = lsptok(NULL, &length); /* now read it */
local_node->ordtype = atol(token);
if (local_node->ordtype == SORTOP_ORDER)
{
token = lsptok(NULL, &length); /* get :sortop */
if (length == 0)
local_node->ord.sortop = NULL;
else
{
int i = -1;
local_node->ord.sortop = palloc(sizeof(Oid) * (INDEX_MAX_KEYS+1));
do {
i++;
Assert(i <= INDEX_MAX_KEYS);
token = lsptok(NULL, &length); /* now read it */
local_node->ord.sortop[i] = strtoul(token, NULL, 10);
} while (local_node->ord.sortop[i] != 0);
}
}
else
{
token = lsptok(NULL, &length); /* get :merge */
local_node->ord.merge = nodeRead(true); /* now read it */
}
return local_node;
}
/* ----------------
* _readPath
*
@ -1473,10 +1522,8 @@ _readPath()
token = lsptok(NULL, &length); /* now read it */
local_node->path_cost = (Cost) atof(token);
#if 0
token = lsptok(NULL, &length); /* get :path_order */
local_node->path_order = nodeRead(true); /* now read it */
#endif
local_node->path_order = nodeRead(true); /* now read it */
token = lsptok(NULL, &length); /* get :keys */
local_node->keys = nodeRead(true); /* now read it */
@ -1507,10 +1554,8 @@ _readIndexPath()
token = lsptok(NULL, &length); /* now read it */
local_node->path.path_cost = (Cost) atof(token);
#if 0
token = lsptok(NULL, &length); /* get :path_order */
local_node->path.path_order = nodeRead(true); /* now read it */
#endif
local_node->path.path_order = nodeRead(true); /* now read it */
token = lsptok(NULL, &length); /* get :keys */
local_node->path.keys = nodeRead(true); /* now read it */
@ -1548,10 +1593,8 @@ _readJoinPath()
token = lsptok(NULL, &length); /* now read it */
local_node->path.path_cost = (Cost) atof(token);
#if 0
token = lsptok(NULL, &length); /* get :path_order */
local_node->path.path_order = nodeRead(true); /* now read it */
#endif
token = lsptok(NULL, &length); /* get :keys */
local_node->path.keys = nodeRead(true); /* now read it */
@ -1615,10 +1658,8 @@ _readMergePath()
local_node->jpath.path.path_cost = (Cost) atof(token);
#if 0
token = lsptok(NULL, &length); /* get :path_order */
local_node->jpath.path.path_order = nodeRead(true); /* now read it */
#endif
token = lsptok(NULL, &length); /* get :keys */
local_node->jpath.path.keys = nodeRead(true); /* now read it */
@ -1691,10 +1732,8 @@ _readHashPath()
local_node->jpath.path.path_cost = (Cost) atof(token);
#if 0
token = lsptok(NULL, &length); /* get :path_order */
local_node->jpath.path.path_order = nodeRead(true); /* now read it */
#endif
token = lsptok(NULL, &length); /* get :keys */
local_node->jpath.path.keys = nodeRead(true); /* now read it */
@ -2071,6 +2110,8 @@ parsePlanString(void)
return_value = _readTargetEntry();
else if (!strncmp(token, "RTE", length))
return_value = _readRangeTblEntry();
else if (!strncmp(token, "PATHORDER", length))
return_value = _readPathOrder();
else if (!strncmp(token, "PATH", length))
return_value = _readPath();
else if (!strncmp(token, "INDEXPATH", length))