#include "access/sdir.h"
#include "lib/stringinfo.h"
#include "nodes/params.h"
#include "nodes/parsenodes.h"
#include "storage/block.h"

Include dependency graph for pathnodes.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	QualCost

struct	AggClauseCosts

struct	PlannerGlobal

struct	PlannerInfo

struct	PartitionSchemeData

struct	RelOptInfo

struct	IndexOptInfo

struct	ForeignKeyOptInfo

struct	StatisticExtInfo

struct	JoinDomain

struct	EquivalenceClass

struct	EquivalenceMember

struct	PathKey

struct	PathTarget

struct	ParamPathInfo

struct	Path

struct	IndexPath

struct	IndexClause

struct	BitmapHeapPath

struct	BitmapAndPath

struct	BitmapOrPath

struct	TidPath

struct	TidRangePath

struct	SubqueryScanPath

struct	ForeignPath

struct	CustomPath

struct	AppendPath

struct	MergeAppendPath

struct	GroupResultPath

struct	MaterialPath

struct	MemoizePath

struct	UniquePath

struct	GatherPath

struct	GatherMergePath

struct	JoinPath

struct	NestPath

struct	MergePath

struct	HashPath

struct	ProjectionPath

struct	ProjectSetPath

struct	SortPath

struct	IncrementalSortPath

struct	GroupPath

struct	UpperUniquePath

struct	AggPath

struct	GroupingSetData

struct	RollupData

struct	GroupingSetsPath

struct	MinMaxAggPath

struct	WindowAggPath

struct	SetOpPath

struct	RecursiveUnionPath

struct	LockRowsPath

struct	ModifyTablePath

struct	LimitPath

struct	RestrictInfo

struct	MergeScanSelCache

struct	PlaceHolderVar

struct	SpecialJoinInfo

struct	OuterJoinClauseInfo

struct	AppendRelInfo

struct	RowIdentityVarInfo

struct	PlaceHolderInfo

struct	MinMaxAggInfo

struct	PlannerParamItem

struct	SemiAntiJoinFactors

struct	JoinPathExtraData

struct	GroupPathExtraData

struct	FinalPathExtraData

struct	JoinCostWorkspace

struct	AggInfo

struct	AggTransInfo

Macros
#define	planner_subplan_get_plan(root, subplan) ((Plan *) list_nth((root)->glob->subplans, (subplan)->plan_id - 1))

#define	HAVE_PLANNERINFO_TYPEDEF 1

#define	planner_rt_fetch(rti, root)

#define	AMFLAG_HAS_TID_RANGE (1 << 0)

#define	IS_SIMPLE_REL(rel)

#define	IS_JOIN_REL(rel)

#define	IS_UPPER_REL(rel)

#define	IS_OTHER_REL(rel)

#define	IS_PARTITIONED_REL(rel)

#define	REL_HAS_ALL_PART_PROPS(rel)

#define	HAVE_INDEXOPTINFO_TYPEDEF 1

#define	EC_MUST_BE_REDUNDANT(eclass) ((eclass)->ec_has_const)

#define	get_pathtarget_sortgroupref(target, colno) ((target)->sortgrouprefs ? (target)->sortgrouprefs[colno] : (Index) 0)

#define	PATH_REQ_OUTER(path) ((path)->param_info ? (path)->param_info->ppi_req_outer : (Relids) NULL)

#define	IS_DUMMY_APPEND(p) (IsA((p), AppendPath) && ((AppendPath *) (p))->subpaths == NIL)

#define	IS_DUMMY_REL(r) is_dummy_rel(r)

#define	RINFO_IS_PUSHED_DOWN(rinfo, joinrelids)

#define	HAVE_SPECIALJOININFO_TYPEDEF 1

#define	GROUPING_CAN_USE_SORT 0x0001

#define	GROUPING_CAN_USE_HASH 0x0002

#define	GROUPING_CAN_PARTIAL_AGG 0x0004

Typedefs
typedef Bitmapset *	Relids

typedef enum CostSelector	CostSelector

typedef struct QualCost	QualCost

typedef struct AggClauseCosts	AggClauseCosts

typedef enum UpperRelationKind	UpperRelationKind

typedef struct PlannerGlobal	PlannerGlobal

typedef struct PlannerInfo	PlannerInfo

typedef struct PartitionSchemeData	PartitionSchemeData

typedef struct PartitionSchemeData *	PartitionScheme

typedef enum RelOptKind	RelOptKind

typedef struct RelOptInfo	RelOptInfo

typedef struct IndexOptInfo	IndexOptInfo

typedef struct ForeignKeyOptInfo	ForeignKeyOptInfo

typedef struct StatisticExtInfo	StatisticExtInfo

typedef struct JoinDomain	JoinDomain

typedef struct EquivalenceClass	EquivalenceClass

typedef struct EquivalenceMember	EquivalenceMember

typedef struct PathKey	PathKey

typedef enum VolatileFunctionStatus	VolatileFunctionStatus

typedef struct PathTarget	PathTarget

typedef struct ParamPathInfo	ParamPathInfo

typedef struct Path	Path

typedef struct IndexPath	IndexPath

typedef struct IndexClause	IndexClause

typedef struct BitmapHeapPath	BitmapHeapPath

typedef struct BitmapAndPath	BitmapAndPath

typedef struct BitmapOrPath	BitmapOrPath

typedef struct TidPath	TidPath

typedef struct TidRangePath	TidRangePath

typedef struct SubqueryScanPath	SubqueryScanPath

typedef struct ForeignPath	ForeignPath

typedef struct CustomPath	CustomPath

typedef struct AppendPath	AppendPath

typedef struct MergeAppendPath	MergeAppendPath

typedef struct GroupResultPath	GroupResultPath

typedef struct MaterialPath	MaterialPath

typedef struct MemoizePath	MemoizePath

typedef enum UniquePathMethod	UniquePathMethod

typedef struct UniquePath	UniquePath

typedef struct GatherPath	GatherPath

typedef struct GatherMergePath	GatherMergePath

typedef struct JoinPath	JoinPath

typedef struct NestPath	NestPath

typedef struct MergePath	MergePath

typedef struct HashPath	HashPath

typedef struct ProjectionPath	ProjectionPath

typedef struct ProjectSetPath	ProjectSetPath

typedef struct SortPath	SortPath

typedef struct IncrementalSortPath	IncrementalSortPath

typedef struct GroupPath	GroupPath

typedef struct UpperUniquePath	UpperUniquePath

typedef struct AggPath	AggPath

typedef struct GroupingSetData	GroupingSetData

typedef struct RollupData	RollupData

typedef struct GroupingSetsPath	GroupingSetsPath

typedef struct MinMaxAggPath	MinMaxAggPath

typedef struct WindowAggPath	WindowAggPath

typedef struct SetOpPath	SetOpPath

typedef struct RecursiveUnionPath	RecursiveUnionPath

typedef struct LockRowsPath	LockRowsPath

typedef struct ModifyTablePath	ModifyTablePath

typedef struct LimitPath	LimitPath

typedef struct RestrictInfo	RestrictInfo

typedef struct MergeScanSelCache	MergeScanSelCache

typedef struct PlaceHolderVar	PlaceHolderVar

typedef struct SpecialJoinInfo	SpecialJoinInfo

typedef struct OuterJoinClauseInfo	OuterJoinClauseInfo

typedef struct AppendRelInfo	AppendRelInfo

typedef struct RowIdentityVarInfo	RowIdentityVarInfo

typedef struct PlaceHolderInfo	PlaceHolderInfo

typedef struct MinMaxAggInfo	MinMaxAggInfo

typedef struct PlannerParamItem	PlannerParamItem

typedef struct SemiAntiJoinFactors	SemiAntiJoinFactors

typedef struct JoinPathExtraData	JoinPathExtraData

typedef struct JoinCostWorkspace	JoinCostWorkspace

typedef struct AggInfo	AggInfo

typedef struct AggTransInfo	AggTransInfo

Enumerations
enum	CostSelector { STARTUP_COST , TOTAL_COST }

enum	UpperRelationKind { UPPERREL_SETOP , UPPERREL_PARTIAL_GROUP_AGG , UPPERREL_GROUP_AGG , UPPERREL_WINDOW , UPPERREL_PARTIAL_DISTINCT , UPPERREL_DISTINCT , UPPERREL_ORDERED , UPPERREL_FINAL }

enum	RelOptKind { RELOPT_BASEREL , RELOPT_JOINREL , RELOPT_OTHER_MEMBER_REL , RELOPT_OTHER_JOINREL , RELOPT_UPPER_REL , RELOPT_OTHER_UPPER_REL }

enum	VolatileFunctionStatus { VOLATILITY_UNKNOWN = 0 , VOLATILITY_VOLATILE , VOLATILITY_NOVOLATILE }

enum	UniquePathMethod { UNIQUE_PATH_NOOP , UNIQUE_PATH_HASH , UNIQUE_PATH_SORT }

enum	PartitionwiseAggregateType { PARTITIONWISE_AGGREGATE_NONE , PARTITIONWISE_AGGREGATE_FULL , PARTITIONWISE_AGGREGATE_PARTIAL }

Functions
bool	is_dummy_rel (RelOptInfo *rel)

Macro Definition Documentation

◆ AMFLAG_HAS_TID_RANGE

#define AMFLAG_HAS_TID_RANGE (1 << 0)

Definition at line 808 of file pathnodes.h.

◆ EC_MUST_BE_REDUNDANT

#define EC_MUST_BE_REDUNDANT ( eclass ) ((eclass)->ec_has_const)

Definition at line 1388 of file pathnodes.h.

◆ get_pathtarget_sortgroupref

#define get_pathtarget_sortgroupref	(	target,
		colno
	)	((target)->sortgrouprefs ? (target)->sortgrouprefs[colno] : (Index) 0)

Definition at line 1517 of file pathnodes.h.

◆ GROUPING_CAN_PARTIAL_AGG

#define GROUPING_CAN_PARTIAL_AGG 0x0004

Definition at line 3214 of file pathnodes.h.

◆ GROUPING_CAN_USE_HASH

#define GROUPING_CAN_USE_HASH 0x0002

Definition at line 3213 of file pathnodes.h.

◆ GROUPING_CAN_USE_SORT

#define GROUPING_CAN_USE_SORT 0x0001

Definition at line 3212 of file pathnodes.h.

◆ HAVE_INDEXOPTINFO_TYPEDEF

#define HAVE_INDEXOPTINFO_TYPEDEF 1

Definition at line 1086 of file pathnodes.h.

◆ HAVE_PLANNERINFO_TYPEDEF

#define HAVE_PLANNERINFO_TYPEDEF 1

Definition at line 189 of file pathnodes.h.

◆ HAVE_SPECIALJOININFO_TYPEDEF

#define HAVE_SPECIALJOININFO_TYPEDEF 1

Definition at line 2845 of file pathnodes.h.

◆ IS_DUMMY_APPEND

#define IS_DUMMY_APPEND ( p ) (IsA((p), AppendPath) && ((AppendPath *) (p))->subpaths == NIL)

Definition at line 1906 of file pathnodes.h.

◆ IS_DUMMY_REL

#define IS_DUMMY_REL ( r ) is_dummy_rel(r)

Definition at line 1914 of file pathnodes.h.

◆ IS_JOIN_REL

#define IS_JOIN_REL ( rel )

Value:

((rel)->reloptkind == RELOPT_JOINREL || \

(rel)->reloptkind == RELOPT_OTHER_JOINREL)

RELOPT_JOINREL

@ RELOPT_JOINREL

Definition: pathnodes.h:813

RELOPT_OTHER_JOINREL

@ RELOPT_OTHER_JOINREL

Definition: pathnodes.h:815

Definition at line 829 of file pathnodes.h.

◆ IS_OTHER_REL

#define IS_OTHER_REL ( rel )

Value:

    ((rel)->reloptkind == RELOPT_OTHER_MEMBER_REL || \
     (rel)->reloptkind == RELOPT_OTHER_JOINREL || \
     (rel)->reloptkind == RELOPT_OTHER_UPPER_REL)

Definition at line 839 of file pathnodes.h.

◆ IS_PARTITIONED_REL

#define IS_PARTITIONED_REL ( rel )

Value:

((rel)->part_scheme && (rel)->boundinfo && (rel)->nparts > 0 && \

(rel)->part_rels && !IS_DUMMY_REL(rel))

IS_DUMMY_REL

#define IS_DUMMY_REL(r)

Definition: pathnodes.h:1914

Definition at line 1041 of file pathnodes.h.

◆ IS_SIMPLE_REL

#define IS_SIMPLE_REL ( rel )

Value:

((rel)->reloptkind == RELOPT_BASEREL || \

(rel)->reloptkind == RELOPT_OTHER_MEMBER_REL)

RELOPT_BASEREL

@ RELOPT_BASEREL

Definition: pathnodes.h:812

Definition at line 824 of file pathnodes.h.

◆ IS_UPPER_REL

#define IS_UPPER_REL ( rel )

Value:

((rel)->reloptkind == RELOPT_UPPER_REL || \

(rel)->reloptkind == RELOPT_OTHER_UPPER_REL)

RELOPT_UPPER_REL

@ RELOPT_UPPER_REL

Definition: pathnodes.h:816

Definition at line 834 of file pathnodes.h.

◆ PATH_REQ_OUTER

#define PATH_REQ_OUTER ( path ) ((path)->param_info ? (path)->param_info->ppi_req_outer : (Relids) NULL)

Definition at line 1637 of file pathnodes.h.

◆ planner_rt_fetch

#define planner_rt_fetch	(	rti,
		root
	)

Value:

((root)->simple_rte_array ? (root)->simple_rte_array[rti] : \

rt_fetch(rti, (root)->parse->rtable))

parse

static struct subre * parse(struct vars *v, int stopper, int type, struct state *init, struct state *final)

Definition: regcomp.c:715

Definition at line 555 of file pathnodes.h.

◆ planner_subplan_get_plan

#define planner_subplan_get_plan	(	root,
		subplan
	)	((Plan *) list_nth((root)->glob->subplans, (subplan)->plan_id - 1))

Definition at line 166 of file pathnodes.h.

◆ REL_HAS_ALL_PART_PROPS

#define REL_HAS_ALL_PART_PROPS ( rel )

Value:

((rel)->part_scheme && (rel)->boundinfo && (rel)->nparts > 0 && \

(rel)->part_rels && (rel)->partexprs && (rel)->nullable_partexprs)

Definition at line 1049 of file pathnodes.h.

◆ RINFO_IS_PUSHED_DOWN

#define RINFO_IS_PUSHED_DOWN	(	rinfo,
		joinrelids
	)

Value:

((rinfo)->is_pushed_down || \

!bms_is_subset((rinfo)->required_relids, joinrelids))

bms_is_subset

bool bms_is_subset(const Bitmapset *a, const Bitmapset *b)

Definition: bitmapset.c:363

Definition at line 2683 of file pathnodes.h.

Typedef Documentation

◆ AggClauseCosts

typedef struct AggClauseCosts AggClauseCosts

◆ AggInfo

typedef struct AggInfo AggInfo

◆ AggPath

typedef struct AggPath AggPath

◆ AggTransInfo

typedef struct AggTransInfo AggTransInfo

◆ AppendPath

typedef struct AppendPath AppendPath

◆ AppendRelInfo

typedef struct AppendRelInfo AppendRelInfo

◆ BitmapAndPath

typedef struct BitmapAndPath BitmapAndPath

◆ BitmapHeapPath

typedef struct BitmapHeapPath BitmapHeapPath

◆ BitmapOrPath

typedef struct BitmapOrPath BitmapOrPath

◆ CostSelector

typedef enum CostSelector CostSelector

◆ CustomPath

typedef struct CustomPath CustomPath

◆ EquivalenceClass

typedef struct EquivalenceClass EquivalenceClass

◆ EquivalenceMember

typedef struct EquivalenceMember EquivalenceMember

◆ ForeignKeyOptInfo

typedef struct ForeignKeyOptInfo ForeignKeyOptInfo

◆ ForeignPath

typedef struct ForeignPath ForeignPath

◆ GatherMergePath

typedef struct GatherMergePath GatherMergePath

◆ GatherPath

typedef struct GatherPath GatherPath

◆ GroupingSetData

typedef struct GroupingSetData GroupingSetData

◆ GroupingSetsPath

typedef struct GroupingSetsPath GroupingSetsPath

◆ GroupPath

typedef struct GroupPath GroupPath

◆ GroupResultPath

typedef struct GroupResultPath GroupResultPath

◆ HashPath

typedef struct HashPath HashPath

◆ IncrementalSortPath

typedef struct IncrementalSortPath IncrementalSortPath

◆ IndexClause

typedef struct IndexClause IndexClause

◆ IndexOptInfo

typedef struct IndexOptInfo IndexOptInfo

Definition at line 589 of file pathnodes.h.

◆ IndexPath

typedef struct IndexPath IndexPath

◆ JoinCostWorkspace

typedef struct JoinCostWorkspace JoinCostWorkspace

◆ JoinDomain

typedef struct JoinDomain JoinDomain

◆ JoinPath

typedef struct JoinPath JoinPath

◆ JoinPathExtraData

typedef struct JoinPathExtraData JoinPathExtraData

◆ LimitPath

typedef struct LimitPath LimitPath

◆ LockRowsPath

typedef struct LockRowsPath LockRowsPath

◆ MaterialPath

typedef struct MaterialPath MaterialPath

◆ MemoizePath

typedef struct MemoizePath MemoizePath

◆ MergeAppendPath

typedef struct MergeAppendPath MergeAppendPath

◆ MergePath

typedef struct MergePath MergePath

◆ MergeScanSelCache

typedef struct MergeScanSelCache MergeScanSelCache

◆ MinMaxAggInfo

typedef struct MinMaxAggInfo MinMaxAggInfo

◆ MinMaxAggPath

typedef struct MinMaxAggPath MinMaxAggPath

◆ ModifyTablePath

typedef struct ModifyTablePath ModifyTablePath

◆ NestPath

typedef struct NestPath NestPath

◆ OuterJoinClauseInfo

typedef struct OuterJoinClauseInfo OuterJoinClauseInfo

◆ ParamPathInfo

typedef struct ParamPathInfo ParamPathInfo

◆ PartitionScheme

typedef struct PartitionSchemeData* PartitionScheme

Definition at line 589 of file pathnodes.h.

◆ PartitionSchemeData

typedef struct PartitionSchemeData PartitionSchemeData

◆ Path

typedef struct Path Path

◆ PathKey

typedef struct PathKey PathKey

◆ PathTarget

typedef struct PathTarget PathTarget

◆ PlaceHolderInfo

typedef struct PlaceHolderInfo PlaceHolderInfo

◆ PlaceHolderVar

typedef struct PlaceHolderVar PlaceHolderVar

◆ PlannerGlobal

typedef struct PlannerGlobal PlannerGlobal

◆ PlannerInfo

typedef struct PlannerInfo PlannerInfo

Definition at line 30 of file pathnodes.h.

◆ PlannerParamItem

typedef struct PlannerParamItem PlannerParamItem

◆ ProjectionPath

typedef struct ProjectionPath ProjectionPath

◆ ProjectSetPath

typedef struct ProjectSetPath ProjectSetPath

◆ QualCost

typedef struct QualCost QualCost

◆ RecursiveUnionPath

typedef struct RecursiveUnionPath RecursiveUnionPath

◆ Relids

typedef Bitmapset* Relids

Definition at line 30 of file pathnodes.h.

◆ RelOptInfo

typedef struct RelOptInfo RelOptInfo

◆ RelOptKind

typedef enum RelOptKind RelOptKind

◆ RestrictInfo

typedef struct RestrictInfo RestrictInfo

◆ RollupData

typedef struct RollupData RollupData

◆ RowIdentityVarInfo

typedef struct RowIdentityVarInfo RowIdentityVarInfo

◆ SemiAntiJoinFactors

typedef struct SemiAntiJoinFactors SemiAntiJoinFactors

◆ SetOpPath

typedef struct SetOpPath SetOpPath

◆ SortPath

typedef struct SortPath SortPath

◆ SpecialJoinInfo

typedef struct SpecialJoinInfo SpecialJoinInfo

Definition at line 1915 of file pathnodes.h.

◆ StatisticExtInfo

typedef struct StatisticExtInfo StatisticExtInfo

◆ SubqueryScanPath

typedef struct SubqueryScanPath SubqueryScanPath

◆ TidPath

typedef struct TidPath TidPath

◆ TidRangePath

typedef struct TidRangePath TidRangePath

◆ UniquePath

typedef struct UniquePath UniquePath

◆ UniquePathMethod

typedef enum UniquePathMethod UniquePathMethod

◆ UpperRelationKind

typedef enum UpperRelationKind UpperRelationKind

◆ UpperUniquePath

typedef struct UpperUniquePath UpperUniquePath

◆ VolatileFunctionStatus

typedef enum VolatileFunctionStatus VolatileFunctionStatus

◆ WindowAggPath

typedef struct WindowAggPath WindowAggPath

Enumeration Type Documentation

◆ CostSelector

enum CostSelector

Enumerator
STARTUP_COST
TOTAL_COST

Definition at line 36 of file pathnodes.h.

 {
     STARTUP_COST, TOTAL_COST
 } CostSelector;

◆ PartitionwiseAggregateType

enum PartitionwiseAggregateType

Enumerator
PARTITIONWISE_AGGREGATE_NONE
PARTITIONWISE_AGGREGATE_FULL
PARTITIONWISE_AGGREGATE_PARTIAL

Definition at line 3227 of file pathnodes.h.

 {
     PARTITIONWISE_AGGREGATE_NONE,
     PARTITIONWISE_AGGREGATE_FULL,
     PARTITIONWISE_AGGREGATE_PARTIAL
 } PartitionwiseAggregateType;

◆ RelOptKind

enum RelOptKind

Enumerator
RELOPT_BASEREL
RELOPT_JOINREL
RELOPT_OTHER_MEMBER_REL
RELOPT_OTHER_JOINREL
RELOPT_UPPER_REL
RELOPT_OTHER_UPPER_REL

Definition at line 810 of file pathnodes.h.

 {
     RELOPT_BASEREL,
     RELOPT_JOINREL,
     RELOPT_OTHER_MEMBER_REL,
     RELOPT_OTHER_JOINREL,
     RELOPT_UPPER_REL,
     RELOPT_OTHER_UPPER_REL
 } RelOptKind;

◆ UniquePathMethod

enum UniquePathMethod

Enumerator
UNIQUE_PATH_NOOP
UNIQUE_PATH_HASH
UNIQUE_PATH_SORT

Definition at line 1986 of file pathnodes.h.

 {
     UNIQUE_PATH_NOOP,           /* input is known unique already */
     UNIQUE_PATH_HASH,           /* use hashing */
     UNIQUE_PATH_SORT            /* use sorting */
 } UniquePathMethod;

◆ UpperRelationKind

enum UpperRelationKind

Enumerator
UPPERREL_SETOP
UPPERREL_PARTIAL_GROUP_AGG
UPPERREL_GROUP_AGG
UPPERREL_WINDOW
UPPERREL_PARTIAL_DISTINCT
UPPERREL_DISTINCT
UPPERREL_ORDERED
UPPERREL_FINAL

Definition at line 69 of file pathnodes.h.

 {
     UPPERREL_SETOP,             /* result of UNION/INTERSECT/EXCEPT, if any */
     UPPERREL_PARTIAL_GROUP_AGG, /* result of partial grouping/aggregation, if
                                  * any */
     UPPERREL_GROUP_AGG,         /* result of grouping/aggregation, if any */
     UPPERREL_WINDOW,            /* result of window functions, if any */
     UPPERREL_PARTIAL_DISTINCT,  /* result of partial "SELECT DISTINCT", if any */
     UPPERREL_DISTINCT,          /* result of "SELECT DISTINCT", if any */
     UPPERREL_ORDERED,           /* result of ORDER BY, if any */
     UPPERREL_FINAL              /* result of any remaining top-level actions */
     /* NB: UPPERREL_FINAL must be last enum entry; it's used to size arrays */
 } UpperRelationKind;

◆ VolatileFunctionStatus

enum VolatileFunctionStatus

Enumerator
VOLATILITY_UNKNOWN
VOLATILITY_VOLATILE
VOLATILITY_NOVOLATILE

Definition at line 1464 of file pathnodes.h.

 {
     VOLATILITY_UNKNOWN = 0,
     VOLATILITY_VOLATILE,
     VOLATILITY_NOVOLATILE
 } VolatileFunctionStatus;

Function Documentation

◆ is_dummy_rel()

bool is_dummy_rel ( RelOptInfo * rel )

Definition at line 1314 of file joinrels.c.

 {
     Path       *path;
  
     /*
      * A rel that is known dummy will have just one path that is a childless
      * Append.  (Even if somehow it has more paths, a childless Append will
      * have cost zero and hence should be at the front of the pathlist.)
      */
     if (rel->pathlist == NIL)
         return false;
     path = (Path *) linitial(rel->pathlist);
  
     /*
      * Initially, a dummy path will just be a childless Append.  But in later
      * planning stages we might stick a ProjectSetPath and/or ProjectionPath
      * on top, since Append can't project.  Rather than make assumptions about
      * which combinations can occur, just descend through whatever we find.
      */
     for (;;)
     {
         if (IsA(path, ProjectionPath))
             path = ((ProjectionPath *) path)->subpath;
         else if (IsA(path, ProjectSetPath))
             path = ((ProjectSetPath *) path)->subpath;
         else
             break;
     }
     if (IS_DUMMY_APPEND(path))
         return true;
     return false;
 }

References IS_DUMMY_APPEND, IsA, linitial, NIL, RelOptInfo::pathlist, and subpath().

Referenced by make_join_rel(), mark_dummy_rel(), and populate_joinrel_with_paths().

Data Structures

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ AMFLAG_HAS_TID_RANGE

◆ EC_MUST_BE_REDUNDANT

◆ get_pathtarget_sortgroupref

◆ GROUPING_CAN_PARTIAL_AGG

◆ GROUPING_CAN_USE_HASH

◆ GROUPING_CAN_USE_SORT

◆ HAVE_INDEXOPTINFO_TYPEDEF

◆ HAVE_PLANNERINFO_TYPEDEF

◆ HAVE_SPECIALJOININFO_TYPEDEF

◆ IS_DUMMY_APPEND

◆ IS_DUMMY_REL

◆ IS_JOIN_REL

◆ IS_OTHER_REL

◆ IS_PARTITIONED_REL

◆ IS_SIMPLE_REL

◆ IS_UPPER_REL

◆ PATH_REQ_OUTER

◆ planner_rt_fetch

◆ planner_subplan_get_plan

◆ REL_HAS_ALL_PART_PROPS

◆ RINFO_IS_PUSHED_DOWN

Typedef Documentation

◆ AggClauseCosts

◆ AggInfo

◆ AggPath

◆ AggTransInfo

◆ AppendPath

◆ AppendRelInfo

◆ BitmapAndPath

◆ BitmapHeapPath

◆ BitmapOrPath

◆ CostSelector

◆ CustomPath

◆ EquivalenceClass

◆ EquivalenceMember

◆ ForeignKeyOptInfo

◆ ForeignPath

◆ GatherMergePath

◆ GatherPath

◆ GroupingSetData

◆ GroupingSetsPath

◆ GroupPath

◆ GroupResultPath

◆ HashPath

◆ IncrementalSortPath

◆ IndexClause

◆ IndexOptInfo

◆ IndexPath

◆ JoinCostWorkspace

◆ JoinDomain

◆ JoinPath

◆ JoinPathExtraData

◆ LimitPath

◆ LockRowsPath

◆ MaterialPath

◆ MemoizePath

◆ MergeAppendPath

◆ MergePath

◆ MergeScanSelCache

◆ MinMaxAggInfo

◆ MinMaxAggPath

◆ ModifyTablePath

◆ NestPath

◆ OuterJoinClauseInfo

◆ ParamPathInfo

◆ PartitionScheme

◆ PartitionSchemeData

◆ Path

◆ PathKey

◆ PathTarget

◆ PlaceHolderInfo

◆ PlaceHolderVar

◆ PlannerGlobal

◆ PlannerInfo