Fix is_array_path to accept a single vertex.

Fixed the is_array_path function to accept a single vertex.

src/backend/utils/adt/agtype.c

@@ -317,7 +317,6 @@ static inline Datum agtype_from_cstring(char *str, int len)
     /* callback for annotation (typecasts) */
     sem.agtype_annotation = agtype_in_agtype_annotation;
 
-
     parse_agtype(lex, &sem);
 
     /* after parsing, the item member has the composed agtype structure */
@@ -328,13 +327,11 @@ size_t check_string_length(size_t len)
 {
     if (len > AGTENTRY_OFFLENMASK)
     {
-        ereport(
-            ERROR,
-            (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
-             errmsg("string too long to represent as agtype string"),
-             errdetail(
-                 "Due to an implementation restriction, agtype strings cannot exceed %d bytes.",
-                 AGTENTRY_OFFLENMASK)));
+        ereport(ERROR,
+                (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
+                 errmsg("string too long to represent as agtype string"),
+                 errdetail("Due to an implementation restriction, agtype strings cannot exceed %d bytes.",
+                           AGTENTRY_OFFLENMASK)));
     }
 
     return len;
@@ -665,8 +662,8 @@ static bool is_array_path(agtype_value *agtv)
     Assert(agtv != NULL);
     Assert(agtv->type == AGTV_ARRAY);
 
-    /* the array needs to have an odd number of elements greater than 2 */
-    if (agtv->val.array.num_elems < 3 ||
+    /* the array needs to have an odd number of elements */
+    if (agtv->val.array.num_elems < 1 ||
         (agtv->val.array.num_elems - 1) % 2 != 0)
         return false;
 
@@ -1765,7 +1762,6 @@ agtype_value *integer_to_agtype_value(int64 int_value)
     return agtv;
 }
 
-
 PG_FUNCTION_INFO_V1(_agtype_build_path);
 
 /*
@@ -3206,7 +3202,6 @@ Datum agtype_btree_cmp(PG_FUNCTION_ARGS)
                                                      &agtype_rhs->root));
 }
 
-
 PG_FUNCTION_INFO_V1(agtype_typecast_numeric);
 /*
  * Execute function to typecast an agtype to an agtype numeric
@@ -3354,7 +3349,6 @@ Datum agtype_typecast_int(PG_FUNCTION_ARGS)
     PG_RETURN_POINTER(agtype_value_to_agtype(&result_value));
 }
 
-
 PG_FUNCTION_INFO_V1(agtype_typecast_float);
 /*
  * Execute function to typecast an agtype to an agtype float
@@ -3723,7 +3717,6 @@ Datum _property_constraint_check(PG_FUNCTION_ARGS)
     PG_RETURN_BOOL(agtype_deep_contains(&property_it, &constraint_it));
 }
 
-
 PG_FUNCTION_INFO_V1(age_id);
 
 Datum age_id(PG_FUNCTION_ARGS)

src/backend/utils/adt/agtype_vle.c

@@ -2961,10 +2961,9 @@ Datum age_match_vle_terminal_edge(PG_FUNCTION_ARGS)
                    (has_veid ? veid == gida[gidasize - 1] : true));
 }
 
+/* PG helper function to build an agtype (Datum) edge for matching */
 PG_FUNCTION_INFO_V1(age_build_vle_match_edge);
-/*
- * PG helper function to build an agtype (Datum) edge for matching.
- */
+
 Datum age_build_vle_match_edge(PG_FUNCTION_ARGS)
 {
     agtype_in_state result;