Merge pull request #1753 from taosdata/feature/add_a_function_for_stream

add last key function for stream

src/inc/tsdb.h

@@ -104,9 +104,10 @@ void tsdbClearTableCfg(STableCfg *config);
 int32_t tsdbGetTableTagVal(TsdbRepoT *repo, STableId id, int32_t col, int16_t *type, int16_t *bytes, char **val);
 int32_t tsdbTableGetName(TsdbRepoT *repo, STableId id, char** name);
 
-int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg);
-int tsdbDropTable(TsdbRepoT *pRepo, STableId tableId);
-int tsdbAlterTable(TsdbRepoT *repo, STableCfg *pCfg);
+int   tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg);
+int   tsdbDropTable(TsdbRepoT *pRepo, STableId tableId);
+int   tsdbAlterTable(TsdbRepoT *repo, STableCfg *pCfg);
+TSKEY tsdbGetTableLastKey(TsdbRepoT *repo, int64_t uid);
 
 // the TSDB repository info
 typedef struct STsdbRepoInfo {

src/tsdb/src/tsdbMain.c

@@ -367,6 +367,15 @@ int tsdbAlterTable(TsdbRepoT *pRepo, STableCfg *pCfg) {
   return 0;
 }
 
+TSKEY tsdbGetTableLastKey(TsdbRepoT *repo, int64_t uid) {
+  STsdbRepo *pRepo = (STsdbRepo *)repo;
+
+  STable *pTable = tsdbGetTableByUid(pRepo->tsdbMeta, uid);
+  if (pTable == NULL) return -1;
+
+  return TSDB_GET_TABLE_LAST_KEY(pTable);
+}
+
 int tsdbDropTable(TsdbRepoT *repo, STableId tableId) {
   if (repo == NULL) return -1;
   STsdbRepo *pRepo = (STsdbRepo *)repo;