diff options
Diffstat (limited to 'src/include/nodes/plannodes.h')
| -rw-r--r-- | src/include/nodes/plannodes.h | 63 |
1 files changed, 30 insertions, 33 deletions
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h index 6e2e01166c9..4a0ff51afde 100644 --- a/src/include/nodes/plannodes.h +++ b/src/include/nodes/plannodes.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/plannodes.h,v 1.79 2005/04/25 01:30:14 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/plannodes.h,v 1.80 2005/10/15 02:49:45 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -43,10 +43,8 @@ typedef struct Plan /* * estimated execution costs for plan (see costsize.c for more info) */ - Cost startup_cost; /* cost expended before fetching any - * tuples */ - Cost total_cost; /* total cost (assuming all tuples - * fetched) */ + Cost startup_cost; /* cost expended before fetching any tuples */ + Cost total_cost; /* total cost (assuming all tuples fetched) */ /* * planner's estimate of result size of this plan step @@ -67,13 +65,13 @@ typedef struct Plan /* * Information for management of parameter-change-driven rescanning * - * extParam includes the paramIDs of all external PARAM_EXEC params - * affecting this plan node or its children. setParam params from the - * node's initPlans are not included, but their extParams are. + * extParam includes the paramIDs of all external PARAM_EXEC params affecting + * this plan node or its children. setParam params from the node's + * initPlans are not included, but their extParams are. * - * allParam includes all the extParam paramIDs, plus the IDs of local - * params that affect the node (i.e., the setParams of its initplans). - * These are _all_ the PARAM_EXEC params that affect this node. + * allParam includes all the extParam paramIDs, plus the IDs of local params + * that affect the node (i.e., the setParams of its initplans). These are + * _all_ the PARAM_EXEC params that affect this node. */ Bitmapset *extParam; Bitmapset *allParam; @@ -83,9 +81,9 @@ typedef struct Plan * resultRelation from Query there and get rid of Query itself from * Executor. Some other stuff like below could be put there, too. */ - int nParamExec; /* Number of them in entire query. This is - * to get Executor know about how many - * PARAM_EXEC there are in query plan. */ + int nParamExec; /* Number of them in entire query. This is to + * get Executor know about how many PARAM_EXEC + * there are in query plan. */ } Plan; /* ---------------- @@ -138,7 +136,7 @@ typedef struct Append * BitmapAnd node - * Generate the intersection of the results of sub-plans. * - * The subplans must be of types that yield tuple bitmaps. The targetlist + * The subplans must be of types that yield tuple bitmaps. The targetlist * and qual fields of the plan are unused and are always NIL. * ---------------- */ @@ -152,7 +150,7 @@ typedef struct BitmapAnd * BitmapOr node - * Generate the union of the results of sub-plans. * - * The subplans must be of types that yield tuple bitmaps. The targetlist + * The subplans must be of types that yield tuple bitmaps. The targetlist * and qual fields of the plan are unused and are always NIL. * ---------------- */ @@ -186,15 +184,15 @@ typedef Scan SeqScan; * in the same form it appeared in the query WHERE condition. Each should * be of the form (indexkey OP comparisonval) or (comparisonval OP indexkey). * The indexkey is a Var or expression referencing column(s) of the index's - * base table. The comparisonval might be any expression, but it won't use + * base table. The comparisonval might be any expression, but it won't use * any columns of the base table. * * indexqual has the same form, but the expressions have been commuted if * necessary to put the indexkeys on the left, and the indexkeys are replaced * by Var nodes identifying the index columns (varattno is the index column * position, not the base table's column, even though varno is for the base - * table). This is a bit hokey ... would be cleaner to use a special-purpose - * node type that could not be mistaken for a regular Var. But it will do + * table). This is a bit hokey ... would be cleaner to use a special-purpose + * node type that could not be mistaken for a regular Var. But it will do * for now. * * indexstrategy and indexsubtype are lists corresponding one-to-one with @@ -205,11 +203,11 @@ typedef Scan SeqScan; typedef struct IndexScan { Scan scan; - Oid indexid; /* OID of index to scan */ - List *indexqual; /* list of index quals (OpExprs) */ - List *indexqualorig; /* the same in original form */ - List *indexstrategy; /* integer list of strategy numbers */ - List *indexsubtype; /* OID list of strategy subtypes */ + Oid indexid; /* OID of index to scan */ + List *indexqual; /* list of index quals (OpExprs) */ + List *indexqualorig; /* the same in original form */ + List *indexstrategy; /* integer list of strategy numbers */ + List *indexsubtype; /* OID list of strategy subtypes */ ScanDirection indexorderdir; /* forward or backward or don't care */ } IndexScan; @@ -217,7 +215,7 @@ typedef struct IndexScan * bitmap index scan node * * BitmapIndexScan delivers a bitmap of potential tuple locations; - * it does not access the heap itself. The bitmap is used by an + * it does not access the heap itself. The bitmap is used by an * ancestor BitmapHeapScan node, possibly after passing through * intermediate BitmapAnd and/or BitmapOr nodes to combine it with * the results of other BitmapIndexScans. @@ -233,11 +231,11 @@ typedef struct IndexScan typedef struct BitmapIndexScan { Scan scan; - Oid indexid; /* OID of index to scan */ - List *indexqual; /* list of index quals (OpExprs) */ - List *indexqualorig; /* the same in original form */ - List *indexstrategy; /* integer list of strategy numbers */ - List *indexsubtype; /* OID list of strategy subtypes */ + Oid indexid; /* OID of index to scan */ + List *indexqual; /* list of index quals (OpExprs) */ + List *indexqualorig; /* the same in original form */ + List *indexstrategy; /* integer list of strategy numbers */ + List *indexsubtype; /* OID list of strategy subtypes */ } BitmapIndexScan; /* ---------------- @@ -252,7 +250,7 @@ typedef struct BitmapIndexScan typedef struct BitmapHeapScan { Scan scan; - List *bitmapqualorig; /* index quals, in standard expr form */ + List *bitmapqualorig; /* index quals, in standard expr form */ } BitmapHeapScan; /* ---------------- @@ -424,8 +422,7 @@ typedef struct Agg typedef struct Unique { Plan plan; - int numCols; /* number of columns to check for - * uniqueness */ + int numCols; /* number of columns to check for uniqueness */ AttrNumber *uniqColIdx; /* indexes into the target list */ } Unique; |