Update varbinaryvarchar C function to read typmod only when the numbe…

…r of arguments are more than 1

contrib/babelfishpg_common/src/varbinary.c

@@ -52,6 +52,7 @@ PG_FUNCTION_INFO_V1(rowversionvarbinary);
 PG_FUNCTION_INFO_V1(varcharvarbinary);
 PG_FUNCTION_INFO_V1(bpcharvarbinary);
 PG_FUNCTION_INFO_V1(varbinaryvarchar);
+PG_FUNCTION_INFO_V1(varbinaryvarchar_deprecated_2_6_0);
 PG_FUNCTION_INFO_V1(varcharbinary);
 PG_FUNCTION_INFO_V1(bpcharbinary);
 PG_FUNCTION_INFO_V1(varcharrowversion);
@@ -722,8 +723,6 @@ bpcharvarbinary(PG_FUNCTION_ARGS)
 	PG_RETURN_BYTEA_P(result);
 }
 
-
-
 Datum
 varbinaryvarchar(PG_FUNCTION_ARGS)
 {
@@ -732,12 +731,18 @@ varbinaryvarchar(PG_FUNCTION_ARGS)
 	VarChar    *result;
 	char 	   *encoded_result;
 	size_t		len = VARSIZE_ANY_EXHDR(source);
-	int32		typmod = PG_GETARG_INT32(1);
-	int32		maxlen = typmod - VARHDRSZ;
+	int32		typmod = -1;
+	int32		maxlen = -1;
 	coll_info	collInfo;
 	int			encodedByteLen;
 	MemoryContext ccxt = CurrentMemoryContext;
 
+	if (fcinfo->nargs > 1)
+	{
+		typmod = PG_GETARG_INT32(1);
+		maxlen = typmod - VARHDRSZ;
+	}
+
 	/*
 	 * Allow trailing null bytes 
 	 * Its safe since multi byte UTF-8 does not contain 0x00