diff options
Diffstat (limited to 'src/include/nodes/relation.h')
| -rw-r--r-- | src/include/nodes/relation.h | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index 1713d298de2..d3ee61c4d04 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -365,18 +365,21 @@ typedef struct PlannerInfo * subplan - plan for subquery (NULL if it's not a subquery) * subroot - PlannerInfo for subquery (NULL if it's not a subquery) * subplan_params - list of PlannerParamItems to be passed to subquery - * fdwroutine - function hooks for FDW, if foreign table (else NULL) - * fdw_handler - OID of FDW handler, if foreign table (else InvalidOid) - * fdw_private - private state for FDW, if foreign table (else NULL) * * Note: for a subquery, tuples, subplan, subroot are not set immediately * upon creation of the RelOptInfo object; they are filled in when - * set_subquery_pathlist processes the object. Likewise, fdwroutine - * and fdw_private are filled during initial path creation. + * set_subquery_pathlist processes the object. * * For otherrels that are appendrel members, these fields are filled * in just as for a baserel. * + * If the relation is either a foreign table or a join of foreign tables that + * all belong to the same foreign server, these fields will be set: + * + * serverid - OID of foreign server, if foreign table (else InvalidOid) + * fdwroutine - function hooks for FDW, if foreign table (else NULL) + * fdw_private - private state for FDW, if foreign table (else NULL) + * * The presence of the remaining fields depends on the restrictions * and joins that the relation participates in: * @@ -460,10 +463,12 @@ typedef struct RelOptInfo struct Plan *subplan; /* if subquery */ PlannerInfo *subroot; /* if subquery */ List *subplan_params; /* if subquery */ + + /* Information about foreign tables and foreign joins */ + Oid serverid; /* identifies server for the table or join */ /* use "struct FdwRoutine" to avoid including fdwapi.h here */ - struct FdwRoutine *fdwroutine; /* if foreign table */ - Oid fdw_handler; /* if foreign table */ - void *fdw_private; /* if foreign table */ + struct FdwRoutine *fdwroutine; + void *fdw_private; /* used by various scans and joins: */ List *baserestrictinfo; /* RestrictInfo structures (if base @@ -523,7 +528,7 @@ typedef struct IndexOptInfo bool *reverse_sort; /* is sort order descending? */ bool *nulls_first; /* do NULLs come first in the sort order? */ bool *canreturn; /* which index cols can be returned in an - index-only scan? */ + * index-only scan? */ Oid relam; /* OID of the access method (in pg_am) */ RegProcedure amcostestimate; /* OID of the access method's cost fcn */ @@ -1668,6 +1673,28 @@ typedef struct SemiAntiJoinFactors } SemiAntiJoinFactors; /* + * Struct for extra information passed to subroutines of add_paths_to_joinrel + * + * restrictlist contains all of the RestrictInfo nodes for restriction + * clauses that apply to this join + * mergeclause_list is a list of RestrictInfo nodes for available + * mergejoin clauses in this join + * sjinfo is extra info about special joins for selectivity estimation + * semifactors is as shown above (only valid for SEMI or ANTI joins) + * param_source_rels are OK targets for parameterization of result paths + * extra_lateral_rels are additional parameterization for result paths + */ +typedef struct JoinPathExtraData +{ + List *restrictlist; + List *mergeclause_list; + SpecialJoinInfo *sjinfo; + SemiAntiJoinFactors semifactors; + Relids param_source_rels; + Relids extra_lateral_rels; +} JoinPathExtraData; + +/* * For speed reasons, cost estimation for join paths is performed in two * phases: the first phase tries to quickly derive a lower bound for the * join cost, and then we check if that's sufficient to reject the path. |