Remove JsonContainerExtractKeys()

Author: Nikita Glukhov

src/backend/utils/adt/json_generic.c

@@ -387,31 +387,3 @@ JsonCopyFlat(JsonContainer *jc)
 
 	return res;
 }
-
-JsonValue *
-JsonContainerExtractKeys(JsonContainer *jsc)
-{
-	JsonIterator	   *it;
-	JsonbParseState	   *state = NULL;
-	JsonValue		   *res = NULL;
-	JsonValue			val;
-	JsonIteratorToken	tok;
-
-	Assert(JsonContainerIsObject(jsc));
-
-	it = JsonIteratorInit(jsc);
-
-	while ((tok = JsonIteratorNext(&it, &val, false)) != WJB_DONE)
-	{
-		res = pushJsonbValue(&state, tok, tok < WJB_BEGIN_ARRAY ? &val : NULL);
-
-		if (tok == WJB_KEY)
-		{
-			tok = JsonIteratorNext(&it, &val, true);
-			Assert(tok == WJB_VALUE);
-			pushJsonbValueScalar(&state, tok, &val);
-		}
-	}
-
-	return res;
-}

src/include/utils/json_generic.h

@@ -284,8 +284,6 @@ extern int JsonCompareContainers(JsonContainer *a, JsonContainer *b);
 
 extern bool JsonbDeepContains(JsonContainer *val, JsonContainer *mContained);
 
-extern JsonValue *JsonContainerExtractKeys(JsonContainer *jsc);
-
 /* jsonb.c support functions */
 extern JsonValue *JsonValueFromCString(char *json, int len, bool unique_keys);