Simplify transformJsonAggConstructor() API

There's no need for callers to pass aggregate names so that the function
can resolve them to OIDs, when callers can just pass aggregate OIDs
directly to begin with.

diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index d706b3dd9e5eed40c4393957f072465d0e6832c9..737b479f5418ef2defd9800cab6f00ff1f0ab8dc 100644 (file)
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -3611,11 +3611,10 @@ transformJsonArrayQueryConstructor(ParseState *pstate,
 static Node *
 transformJsonAggConstructor(ParseState *pstate, JsonAggConstructor *agg_ctor,
                            JsonReturning *returning, List *args,
-                           const char *aggfn, Oid aggtype,
+                           Oid aggfnoid, Oid aggtype,
                            JsonConstructorType ctor_type,
                            bool unique, bool absent_on_null)
 {
-   Oid         aggfnoid;
    Node       *node;
    Expr       *aggfilter;
 
@@ -3623,9 +3622,6 @@ transformJsonAggConstructor(ParseState *pstate, JsonAggConstructor *agg_ctor,
        transformWhereClause(pstate, agg_ctor->agg_filter,
                             EXPR_KIND_FILTER, "FILTER") : NULL;
 
-   aggfnoid = DatumGetInt32(DirectFunctionCall1(regprocin,
-                                                CStringGetDatum(aggfn)));
-
    if (agg_ctor->over)
    {
        /* window function */
@@ -3703,7 +3699,7 @@ transformJsonObjectAgg(ParseState *pstate, JsonObjectAgg *agg)
    Node       *key;
    Node       *val;
    List       *args;
-   const char *aggfnname;
+   Oid         aggfnoid;
    Oid         aggtype;
 
    key = transformExprRecurse(pstate, (Node *) agg->arg->key);
@@ -3717,13 +3713,13 @@ transformJsonObjectAgg(ParseState *pstate, JsonObjectAgg *agg)
    {
        if (agg->absent_on_null)
            if (agg->unique)
-               aggfnname = "pg_catalog.jsonb_object_agg_unique_strict";
+               aggfnoid = F_JSONB_OBJECT_AGG_UNIQUE_STRICT;
            else
-               aggfnname = "pg_catalog.jsonb_object_agg_strict";
+               aggfnoid = F_JSONB_OBJECT_AGG_STRICT;
        else if (agg->unique)
-           aggfnname = "pg_catalog.jsonb_object_agg_unique";
+           aggfnoid = F_JSONB_OBJECT_AGG_UNIQUE;
        else
-           aggfnname = "pg_catalog.jsonb_object_agg";
+           aggfnoid = F_JSONB_OBJECT_AGG;
 
        aggtype = JSONBOID;
    }
@@ -3731,19 +3727,19 @@ transformJsonObjectAgg(ParseState *pstate, JsonObjectAgg *agg)
    {
        if (agg->absent_on_null)
            if (agg->unique)
-               aggfnname = "pg_catalog.json_object_agg_unique_strict";
+               aggfnoid = F_JSON_OBJECT_AGG_UNIQUE_STRICT;
            else
-               aggfnname = "pg_catalog.json_object_agg_strict";
+               aggfnoid = F_JSON_OBJECT_AGG_STRICT;
        else if (agg->unique)
-           aggfnname = "pg_catalog.json_object_agg_unique";
+           aggfnoid = F_JSON_OBJECT_AGG_UNIQUE;
        else
-           aggfnname = "pg_catalog.json_object_agg";
+           aggfnoid = F_JSON_OBJECT_AGG;
 
        aggtype = JSONOID;
    }
 
    return transformJsonAggConstructor(pstate, agg->constructor, returning,
-                                      args, aggfnname, aggtype,
+                                      args, aggfnoid, aggtype,
                                       JSCTOR_JSON_OBJECTAGG,
                                       agg->unique, agg->absent_on_null);
 }
@@ -3760,7 +3756,7 @@ transformJsonArrayAgg(ParseState *pstate, JsonArrayAgg *agg)
 {
    JsonReturning *returning;
    Node       *arg;
-   const char *aggfnname;
+   Oid         aggfnoid;
    Oid         aggtype;
 
    arg = transformJsonValueExpr(pstate, agg->arg, JS_FORMAT_DEFAULT);
@@ -3770,19 +3766,17 @@ transformJsonArrayAgg(ParseState *pstate, JsonArrayAgg *agg)
 
    if (returning->format->format_type == JS_FORMAT_JSONB)
    {
-       aggfnname = agg->absent_on_null ?
-           "pg_catalog.jsonb_agg_strict" : "pg_catalog.jsonb_agg";
+       aggfnoid = agg->absent_on_null ? F_JSONB_AGG_STRICT : F_JSONB_AGG;
        aggtype = JSONBOID;
    }
    else
    {
-       aggfnname = agg->absent_on_null ?
-           "pg_catalog.json_agg_strict" : "pg_catalog.json_agg";
+       aggfnoid = agg->absent_on_null ? F_JSON_AGG_STRICT : F_JSON_AGG;
        aggtype = JSONOID;
    }
 
    return transformJsonAggConstructor(pstate, agg->constructor, returning,
-                                      list_make1(arg), aggfnname, aggtype,
+                                      list_make1(arg), aggfnoid, aggtype,
                                       JSCTOR_JSON_ARRAYAGG,
                                       false, agg->absent_on_null);
 }