enh(index): add more UT

source/libs/index/src/index.c

@@ -27,10 +27,33 @@
 #endif
 
 #define INDEX_NUM_OF_THREADS 4
-#define INDEX_QUEUE_SIZE     200
+#define INDEX_QUEUE_SIZE 200
 
 void* indexQhandle = NULL;
 
+#define INDEX_DATA_BOOL_NULL 0x02
+#define INDEX_DATA_TINYINT_NULL 0x80
+#define INDEX_DATA_SMALLINT_NULL 0x8000
+#define INDEX_DATA_INT_NULL 0x80000000L
+#define INDEX_DATA_BIGINT_NULL 0x8000000000000000L
+#define INDEX_DATA_TIMESTAMP_NULL TSDB_DATA_BIGINT_NULL
+
+#define INDEX_DATA_FLOAT_NULL 0x7FF00000            // it is an NAN
+#define INDEX_DATA_DOUBLE_NULL 0x7FFFFF0000000000L  // an NAN
+#define INDEX_DATA_NCHAR_NULL 0xFFFFFFFF
+#define INDEX_DATA_BINARY_NULL 0xFF
+#define INDEX_DATA_JSON_NULL 0xFFFFFFFF
+#define INDEX_DATA_JSON_null 0xFFFFFFFE
+#define INDEX_DATA_JSON_NOT_NULL 0x01
+
+#define INDEX_DATA_UTINYINT_NULL 0xFF
+#define INDEX_DATA_USMALLINT_NULL 0xFFFF
+#define INDEX_DATA_UINT_NULL 0xFFFFFFFF
+#define INDEX_DATA_UBIGINT_NULL 0xFFFFFFFFFFFFFFFFL
+
+#define INDEX_DATA_NULL_STR "NULL"
+#define INDEX_DATA_NULL_STR_L "null"
+
 void indexInit() {
   // refactor later
   indexQhandle = taosInitScheduler(INDEX_QUEUE_SIZE, INDEX_NUM_OF_THREADS, "index");