[TD-2925]<fix>: rename keep2,keep1 -> keep1,keep0

src/inc/taoserror.h

@@ -192,7 +192,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_MND_DB_IN_DROPPING,           0, 0x0386, "Database n
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_VGROUP_NOT_READY,         0, 0x0387, "Database unsynced")
 
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION_DAYS,   0, 0x0390, "Invalid database option: days out of range")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION_KEEP,   0, 0x0391, "Invalid database option: keep >= keep2 >= keep1 >= days")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION_KEEP,   0, 0x0391, "Invalid database option: keep >= keep1 >= keep0 >= days")
 
 // dnode
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_MSG_NOT_PROCESSED,        0, 0x0400, "Message not processed")

src/kit/taosdemox/taosdemox.c

@@ -1380,7 +1380,7 @@ static void printfDbInfoForQueryToFile(char* filename, SDbInfo* dbInfos, int ind
   fprintf(fp, "replica: %d\n", dbInfos->replica);
   fprintf(fp, "quorum: %d\n", dbInfos->quorum);
   fprintf(fp, "days: %d\n", dbInfos->days);    
-  fprintf(fp, "keep1,keep2,keep(D): %s\n", dbInfos->keeplist);      
+  fprintf(fp, "keep0,keep1,keep(D): %s\n", dbInfos->keeplist);      
   fprintf(fp, "cache(MB): %d\n", dbInfos->cache);
   fprintf(fp, "blocks: %d\n", dbInfos->blocks);
   fprintf(fp, "minrows: %d\n", dbInfos->minrows);

src/mnode/src/mnodeDb.c

@@ -568,7 +568,7 @@ static int32_t mnodeGetDbMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn
 
   pShow->bytes[cols] = 24 + VARSTR_HEADER_SIZE;
   pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-  strcpy(pSchema[cols].name, "keep1,keep2,keep(D)");
+  strcpy(pSchema[cols].name, "keep0,keep1,keep(D)");
   pSchema[cols].bytes = htons(pShow->bytes[cols]);
   cols++;