diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index ef73342019f..58328c43774 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -2024,18 +2024,29 @@ typedef struct GrantStmt } GrantStmt; /* - * Note: ObjectWithArgs carries only the types of the input parameters of the - * function. So it is sufficient to identify an existing function, but it - * is not enough info to define a function nor to call it. + * ObjectWithArgs represents a function/procedure/operator name plus parameter + * identification. + * + * objargs includes only the types of the input parameters of the object. + * In some contexts, that will be all we have, and it's enough to look up + * objects according to the traditional Postgres rules (i.e., when only input + * arguments matter). + * + * objfuncargs, if not NIL, carries the full specification of the parameter + * list, including parameter mode annotations. + * + * Some grammar productions can set args_unspecified = true instead of + * providing parameter info. In this case, lookup will succeed only if + * the object name is unique. Note that otherwise, NIL parameter lists + * mean zero arguments. */ typedef struct ObjectWithArgs { NodeTag type; List *objname; /* qualified name of function/operator */ - List *objargs; /* list of Typename nodes */ - bool args_unspecified; /* argument list was omitted, so name must - * be unique (note that objargs == NIL - * means zero args) */ + List *objargs; /* list of Typename nodes (input args only) */ + List *objfuncargs; /* list of FunctionParameter nodes */ + bool args_unspecified; /* argument list was omitted? */ } ObjectWithArgs; /* @@ -2955,7 +2966,9 @@ typedef enum FunctionParameterMode FUNC_PARAM_OUT = 'o', /* output only */ FUNC_PARAM_INOUT = 'b', /* both */ FUNC_PARAM_VARIADIC = 'v', /* variadic (always input) */ - FUNC_PARAM_TABLE = 't' /* table function output column */ + FUNC_PARAM_TABLE = 't', /* table function output column */ + /* this is not used in pg_proc: */ + FUNC_PARAM_DEFAULT = 'd' /* default; effectively same as IN */ } FunctionParameterMode; typedef struct FunctionParameter @@ -2998,13 +3011,19 @@ typedef struct InlineCodeBlock /* ---------------------- * CALL statement + * + * OUT-mode arguments are removed from the transformed funcexpr. The outargs + * list contains copies of the expressions for all output arguments, in the + * order of the procedure's declared arguments. (outargs is never evaluated, + * but is useful to the caller as a reference for what to assign to.) * ---------------------- */ typedef struct CallStmt { NodeTag type; FuncCall *funccall; /* from the parser */ - FuncExpr *funcexpr; /* transformed */ + FuncExpr *funcexpr; /* transformed call, with only input args */ + List *outargs; /* transformed output-argument expressions */ } CallStmt; typedef struct CallContext |