diff options
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 39d2c10bdfe..b72e605e4fe 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -19,6 +19,7 @@ #include "executor/instrument.h" #include "nodes/params.h" #include "nodes/plannodes.h" +#include "nodes/relation.h" #include "utils/reltrigger.h" #include "utils/sortsupport.h" #include "utils/tuplestore.h" @@ -1504,6 +1505,45 @@ typedef struct ForeignScanState void *fdw_state; /* foreign-data wrapper can keep state here */ } ForeignScanState; +/* ---------------- + * CustomScanState information + * + * CustomScan nodes are used to execute custom code within executor. + * ---------------- + */ +struct CustomExecMethods; +struct ExplainState; /* to avoid to include explain.h here */ + +typedef struct CustomScanState +{ + ScanState ss; + uint32 flags; /* mask of CUSTOMPATH_* flags defined in relation.h*/ + const struct CustomExecMethods *methods; +} CustomScanState; + +typedef struct CustomExecMethods +{ + const char *CustomName; + + /* EXECUTOR methods */ + void (*BeginCustomScan)(CustomScanState *node, + EState *estate, + int eflags); + TupleTableSlot *(*ExecCustomScan)(CustomScanState *node); + void (*EndCustomScan)(CustomScanState *node); + void (*ReScanCustomScan)(CustomScanState *node); + void (*MarkPosCustomScan)(CustomScanState *node); + void (*RestrPosCustomScan)(CustomScanState *node); + + /* EXPLAIN support */ + void (*ExplainCustomScan)(CustomScanState *node, + List *ancestors, + struct ExplainState *es); + Node *(*GetSpecialCustomVar)(CustomScanState *node, + Var *varnode, + PlanState **child_ps); +} CustomExecMethods; + /* ---------------------------------------------------------------- * Join State Information * ---------------------------------------------------------------- |