diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index f1e20ef937..cedf022e17 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -118,15 +118,19 @@ typedef struct Expr * Note: during parsing/planning, varnoold/varoattno are always just copies * of varno/varattno. At the tail end of planning, Var nodes appearing in * upper-level plan nodes are reassigned to point to the outputs of their - * subplans; for example, in a join node varno becomes INNER or OUTER and - * varattno becomes the index of the proper element of that subplan's target - * list. But varnoold/varoattno continue to hold the original values. + * subplans; for example, in a join node varno becomes INNER_VAR or OUTER_VAR + * and varattno becomes the index of the proper element of that subplan's + * target list. But varnoold/varoattno continue to hold the original values. * The code doesn't really need varnoold/varoattno, but they are very useful * for debugging and interpreting completed plans, so we keep them around. */ -#define INNER 65000 -#define OUTER 65001 +#define INNER_VAR 65000 /* reference to inner subplan */ +#define OUTER_VAR 65001 /* reference to outer subplan */ +#define INDEX_VAR 65002 /* reference to index column */ +#define IS_SPECIAL_VARNO(varno) ((varno) >= INNER_VAR) + +/* Symbols for the indexes of the special RTE entries in rules */ #define PRS2_OLD_VARNO 1 #define PRS2_NEW_VARNO 2 @@ -134,7 +138,7 @@ typedef struct Var { Expr xpr; Index varno; /* index of this var's relation in the range - * table (could also be INNER or OUTER) */ + * table, or INNER_VAR/OUTER_VAR/INDEX_VAR */ AttrNumber varattno; /* attribute number of this var, or zero for * all */ Oid vartype; /* pg_type OID for the type of this var */ |