diff options
Diffstat (limited to 'src/include/nodes')
| -rw-r--r-- | src/include/nodes/plannodes.h | 20 | ||||
| -rw-r--r-- | src/include/nodes/relation.h | 2 |
2 files changed, 17 insertions, 5 deletions
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h index 21cbfa8cf0..baeba2d330 100644 --- a/src/include/nodes/plannodes.h +++ b/src/include/nodes/plannodes.h @@ -471,7 +471,11 @@ typedef struct WorkTableScan * fdw_exprs and fdw_private are both under the control of the foreign-data * wrapper, but fdw_exprs is presumed to contain expression trees and will * be post-processed accordingly by the planner; fdw_private won't be. - * Note that everything in both lists must be copiable by copyObject(). + * An optional fdw_ps_tlist is used to map a reference to an attribute of + * underlying relation(s) onto a pair of INDEX_VAR and alternative varattno. + * When fdw_ps_tlist is used, this represents a remote join, and the FDW + * is responsible for setting this field to an appropriate value. + * Note that everything in above lists must be copiable by copyObject(). * One way to store an arbitrary blob of bytes is to represent it as a bytea * Const. Usually, though, you'll be better off choosing a representation * that can be dumped usefully by nodeToString(). @@ -480,18 +484,22 @@ typedef struct WorkTableScan typedef struct ForeignScan { Scan scan; + Oid fdw_handler; /* OID of FDW handler */ List *fdw_exprs; /* expressions that FDW may evaluate */ + List *fdw_ps_tlist; /* tlist, if replacing a join */ List *fdw_private; /* private data for FDW */ + Bitmapset *fdw_relids; /* RTIs generated by this scan */ bool fsSystemCol; /* true if any "system column" is needed */ } ForeignScan; /* ---------------- * CustomScan node * - * The comments for ForeignScan's fdw_exprs and fdw_private fields apply - * equally to custom_exprs and custom_private. Note that since Plan trees - * can be copied, custom scan providers *must* fit all plan data they need - * into those fields; embedding CustomScan in a larger struct will not work. + * The comments for ForeignScan's fdw_exprs, fdw_varmap and fdw_private fields + * apply equally to custom_exprs, custom_ps_tlist and custom_private. + * Note that since Plan trees can be copied, custom scan providers *must* + * fit all plan data they need into those fields; embedding CustomScan in + * a larger struct will not work. * ---------------- */ struct CustomScan; @@ -512,7 +520,9 @@ typedef struct CustomScan Scan scan; uint32 flags; /* mask of CUSTOMPATH_* flags, see relation.h */ List *custom_exprs; /* expressions that custom code may evaluate */ + List *custom_ps_tlist;/* tlist, if replacing a join */ List *custom_private; /* private data for custom code */ + Bitmapset *custom_relids; /* RTIs generated by this scan */ const CustomScanMethods *methods; } CustomScan; diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index 401a686664..1713d298de 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -366,6 +366,7 @@ typedef struct PlannerInfo * 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 @@ -461,6 +462,7 @@ typedef struct RelOptInfo List *subplan_params; /* if subquery */ /* 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 */ /* used by various scans and joins: */ |