diff options
Diffstat (limited to 'src/include/nodes/relation.h')
| -rw-r--r-- | src/include/nodes/relation.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index 8392ab505bd..2ab9e0f6e7f 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: relation.h,v 1.81 2003/06/15 22:51:45 tgl Exp $ + * $Id: relation.h,v 1.82 2003/06/29 23:05:05 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -89,8 +89,8 @@ typedef struct QualCost * clauses have been applied (ie, output rows of a plan for it) * width - avg. number of bytes per tuple in the relation after the * appropriate projections have been done (ie, output width) - * targetlist - List of TargetEntry nodes for the attributes we need - * to output from this relation + * reltargetlist - List of Var nodes for the attributes we need to + * output from this relation (in no particular order) * pathlist - List of Path nodes, one for each potentially useful * method of generating the relation * cheapest_startup_path - the pathlist member with lowest startup cost @@ -107,7 +107,12 @@ typedef struct QualCost * relid - RTE index (this is redundant with the relids field, but * is provided for convenience of access) * rtekind - distinguishes plain relation, subquery, or function RTE - * varlist - list of Vars for physical columns (only if table) + * min_attr, max_attr - range of valid AttrNumbers for rel + * attr_needed - array of bitmapsets indicating the highest joinrel + * in which each attribute is needed; if bit 0 is set then + * the attribute is needed as part of final targetlist + * attr_widths - cache space for per-attribute width estimates; + * zero means not computed yet * indexlist - list of IndexOptInfo nodes for relation's indexes * (always NIL if it's not a table) * pages - number of disk pages in relation (zero if not a table) @@ -183,7 +188,7 @@ typedef struct RelOptInfo int width; /* estimated avg width of result tuples */ /* materialization information */ - List *targetlist; + FastList reltargetlist; List *pathlist; /* Path structures */ struct Path *cheapest_startup_path; struct Path *cheapest_total_path; @@ -193,7 +198,10 @@ typedef struct RelOptInfo /* information about a base rel (not set for join rels!) */ Index relid; RTEKind rtekind; /* RELATION, SUBQUERY, or FUNCTION */ - List *varlist; + AttrNumber min_attr; /* smallest attrno of rel (often <0) */ + AttrNumber max_attr; /* largest attrno of rel */ + Relids *attr_needed; /* array indexed [min_attr .. max_attr] */ + int32 *attr_widths; /* array indexed [min_attr .. max_attr] */ List *indexlist; long pages; double tuples; |