Merge pull request #6368 from taosdata/fix/TD-4412

[TD-4412]<fix>: add new configuration parameter for db option cachelast

src/common/src/tglobal.c

@@ -817,6 +817,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "precision";
+  cfg.ptr = &tsTimePrecision;
+  cfg.valType = TAOS_CFG_VTYPE_INT8;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_PRECISION;
+  cfg.maxValue = TSDB_MAX_PRECISION;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "comp";
   cfg.ptr = &tsCompression;
   cfg.valType = TAOS_CFG_VTYPE_INT8;
@@ -887,6 +897,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "cachelast";
+  cfg.ptr = &tsCacheLastRow;
+  cfg.valType = TAOS_CFG_VTYPE_INT8;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_DB_CACHE_LAST_ROW;
+  cfg.maxValue = TSDB_MAX_DB_CACHE_LAST_ROW;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "mqttHostName";
   cfg.ptr = tsMqttHostName;
   cfg.valType = TAOS_CFG_VTYPE_STRING;

tests/pytest/functions/showOfflineThresholdIs864000.py

@@ -25,7 +25,7 @@ class TDTestCase:
 
     def run(self):
         tdSql.query("show variables")
-        tdSql.checkData(51, 1, 864000)
+        tdSql.checkData(53, 1, 864000)
 
     def stop(self):
         tdSql.close()
@@ -33,4 +33,4 @@ class TDTestCase:
 
 
 tdCases.addWindows(__file__, TDTestCase())
-tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file
+tdCases.addLinux(__file__, TDTestCase())