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Second try at fixing join alias variables. Instead of attaching miscellaneous

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lists to join RTEs, attach a list of Vars and COALESCE expressions that will
replace the join's alias variables during planning.  This simplifies
flatten_join_alias_vars while still making it easy to fix up varno references
when transforming the query tree.  Add regression test cases for interactions
of subqueries with outer joins.
This commit is contained in:
Tom Lane
2002-04-28 19:54:29 +00:00
parent c8996f9c6b
commit 6c59886942
21 changed files with 624 additions and 653 deletions
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19
src/backend/nodes/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.119 2002/04/11 20:00:00 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.120 2002/04/28 19:54:28 tgl Exp $
*
* NOTES
* Most of the read functions for plan nodes are tested. (In fact, they
@ -421,10 +421,6 @@ _getJoin(Join *node)
token = pg_strtok(&length); /* skip the :joinqual */
node->joinqual = nodeRead(true); /* get the joinqual */
token = pg_strtok(&length); /* skip the :joinrti */
token = pg_strtok(&length); /* get the joinrti */
node->joinrti = atoi(token);
}
@ -1523,17 +1519,8 @@ _readRangeTblEntry(void)
token = pg_strtok(&length); /* get jointype */
local_node->jointype = (JoinType) atoi(token);
token = pg_strtok(&length); /* eat :joincoltypes */
local_node->joincoltypes = toOidList(nodeRead(true));
token = pg_strtok(&length); /* eat :joincoltypmods */
local_node->joincoltypmods = toIntList(nodeRead(true));
token = pg_strtok(&length); /* eat :joinleftcols */
local_node->joinleftcols = toIntList(nodeRead(true));
token = pg_strtok(&length); /* eat :joinrightcols */
local_node->joinrightcols = toIntList(nodeRead(true));
token = pg_strtok(&length); /* eat :joinaliasvars */
local_node->joinaliasvars = nodeRead(true); /* now read it */
break;
default: