Re: Add SPLIT PARTITION/MERGE PARTITIONS commands

hi.
one more minor issue.

+ * defaultPart: true if one of split partitions is DEFAULT
+ * pstate: pointer to ParseState struct for determining error position
+ */
+static void
+check_two_partitions_bounds_range(Relation parent,
+  RangeVar *first_name,
+  PartitionBoundSpec *first_bound,
+  RangeVar *second_name,
+  PartitionBoundSpec *second_bound,
+  bool defaultPart,
+  ParseState *pstate)

v43-0001 doesn't have the SPLIT PARTITION feature.
maybe we need to remove the argument (bool defaultPart)
from check_two_partitions_bounds_range, aslo remove the comments.
then we can add it on 0002 SPLIT PARTITION patch.