enh: use int32_t as schema version

include/common/ttypes.h

@@ -30,7 +30,7 @@ typedef uint64_t TDRowVerT;
 typedef int16_t  col_id_t;
 typedef int8_t   col_type_t;
 typedef int32_t  col_bytes_t;
-typedef uint16_t schema_ver_t;
+typedef int32_t schema_ver_t;
 typedef int32_t  func_id_t;
 
 #pragma pack(push, 1)

source/dnode/vnode/src/meta/metaQuery.c

@@ -278,13 +278,12 @@ STSchema *metaGetTbTSchema(SMeta *pMeta, tb_uid_t uid, int32_t sver) {
   pSW = metaGetTableSchema(pMeta, quid, sver, 0);
   if (!pSW) return NULL;
 
-  tdInitTSchemaBuilder(&sb, 0);
+  tdInitTSchemaBuilder(&sb, sver);
   for (int i = 0; i < pSW->nCols; i++) {
     pSchema = pSW->pSchema + i;
     tdAddColToSchema(&sb, pSchema->type, pSchema->flags, pSchema->colId, pSchema->bytes);
   }
   pTSchema = tdGetSchemaFromBuilder(&sb);
-  pTSchema->version = sver;
 
   tdDestroyTSchemaBuilder(&sb);