Simplify addJsonbToParseState()

This function no longer needs to walk non-scalar structures passed to
it, following commit 54547bd87f49326d67051254c363e6597d16ffda.

diff --git a/src/backend/utils/adt/jsonfuncs.c b/src/backend/utils/adt/jsonfuncs.c
index fa059c4d6cf7f2004ced445546f1b32a473061a1..514349310e68de484839762b33265992b7a1e914 100644 (file)
--- a/src/backend/utils/adt/jsonfuncs.c
+++ b/src/backend/utils/adt/jsonfuncs.c
@@ -3225,8 +3225,9 @@ jsonb_strip_nulls(PG_FUNCTION_ARGS)
  * If the parse state container is an object, the jsonb is pushed as
  * a value, not a key.
  *
- * This needs to be done using an iterator because pushJsonbValue doesn't
- * like getting jbvBinary values, so we can't just push jb as a whole.
+ * If the new value is a root scalar, extract the value using an iterator, and
+ * just add that. Otherwise, add the value as the type appropriate for
+ * the container.
  */
 static void
 addJsonbToParseState(JsonbParseState **jbps, Jsonb *jb)
@@ -3236,36 +3237,26 @@ addJsonbToParseState(JsonbParseState **jbps, Jsonb *jb)
        int                     type;
        JsonbValue      v;
 
-       it = JsonbIteratorInit(&jb->root);
-
        Assert(o->type == jbvArray || o->type == jbvObject);
 
        if (JB_ROOT_IS_SCALAR(jb))
        {
+               it = JsonbIteratorInit(&jb->root);
+
                (void) JsonbIteratorNext(&it, &v, false);               /* skip array header */
                (void) JsonbIteratorNext(&it, &v, false);               /* fetch scalar value */
 
-               switch (o->type)
-               {
-                       case jbvArray:
-                               (void) pushJsonbValue(jbps, WJB_ELEM, &v);
-                               break;
-                       case jbvObject:
-                               (void) pushJsonbValue(jbps, WJB_VALUE, &v);
-                               break;
-                       default:
-                               elog(ERROR, "unexpected parent of nested structure");
-               }
+               if (o->type == jbvArray)
+                       (void) pushJsonbValue(jbps, WJB_ELEM, &v);
+               else
+                       (void) pushJsonbValue(jbps, WJB_VALUE, &v);
        }
        else
        {
-               while ((type = JsonbIteratorNext(&it, &v, false)) != WJB_DONE)
-               {
-                       if (type == WJB_KEY || type == WJB_VALUE || type == WJB_ELEM)
-                               (void) pushJsonbValue(jbps, type, &v);
-                       else
-                               (void) pushJsonbValue(jbps, type, NULL);
-               }
+               if (o->type == jbvArray)
+                       (void) pushJsonbValue(jbps, WJB_ELEM, &jb->root);
+               else
+                       (void) pushJsonbValue(jbps, WJB_VALUE, &jb->root);
        }
 
 }