[TD-2309]<feature>: add config option to enable/disable stream (continuous query)

documentation20/webdocs/markdowndocs/administrator-ch.md

@@ -95,6 +95,7 @@ TDengine系统后台服务由taosd提供，可以在配置文件taos.cfg里修
 - logKeepDays：日志文件的最长保存时间。大于0时，日志文件会被重命名为taosdlog.xxx，其中xxx为日志文件最后修改的时间戳，单位为秒。默认值：0天。
 - maxSQLLength：单条SQL语句允许最长限制。默认值：65380字节。
 - telemetryReporting: 是否允许 TDengine 采集和上报基本使用信息，0表示不允许，1表示允许。 默认值：1。
+- stream: 是否启用连续查询（流计算功能），0表示不允许，1表示允许。 默认值：1。
 
 **注意：**对于端口，TDengine会使用从serverPort起13个连续的TCP和UDP端口号，请务必在防火墙打开。因此如果是缺省配置，需要打开从6030都6042共13个端口，而且必须TCP和UDP都打开。
 

packaging/cfg/taos.cfg

@@ -260,4 +260,7 @@
 # maxBinaryDisplayWidth 30
 
 # enable/disable telemetry reporting
-# telemetryReporting    1
+# telemetryReporting    1
+
+# enable/disable stream (continuous query)
+# stream                1

src/common/inc/tglobal.h

@@ -125,6 +125,9 @@ extern char    tsMonitorDbName[];
 extern char    tsInternalPass[];
 extern int32_t tsMonitorInterval;
 
+// stream
+extern int32_t tsEnableStream;
+
 // internal
 extern int32_t tsPrintAuth;
 extern int32_t tscEmbedded;

src/common/src/tglobal.c

@@ -161,6 +161,9 @@ char    tsMonitorDbName[TSDB_DB_NAME_LEN] = "log";
 char    tsInternalPass[] = "secretkey";
 int32_t tsMonitorInterval = 30;  // seconds
 
+// stream
+int32_t tsEnableStream = 1;
+
 // internal
 int32_t tsPrintAuth = 0;
 int32_t tscEmbedded = 0;
@@ -1015,6 +1018,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "stream";
+  cfg.ptr = &tsEnableStream;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 0;
+  cfg.maxValue = 1;
+  cfg.ptrLength = 1;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "httpEnableRecordSql";
   cfg.ptr = &tsHttpEnableRecordSql;
   cfg.valType = TAOS_CFG_VTYPE_INT32;

src/cq/src/cqMain.c

@@ -69,6 +69,9 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row);
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj);
 
 void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
+  if (tsEnableStream == 0) {
+    return NULL;
+  }
   SCqContext *pContext = calloc(sizeof(SCqContext), 1);
   if (pContext == NULL) {
     terrno = TAOS_SYSTEM_ERROR(errno);
@@ -99,6 +102,9 @@ void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
 }
 
 void cqClose(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqContext *pContext = handle;
   if (handle == NULL) return;
 
@@ -129,6 +135,9 @@ void cqClose(void *handle) {
 }
 
 void cqStart(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqContext *pContext = handle;
   if (pContext->dbConn || pContext->master) return;
 
@@ -147,6 +156,9 @@ void cqStart(void *handle) {
 }
 
 void cqStop(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqContext *pContext = handle;
   cInfo("vgId:%d, stop all CQs", pContext->vgId);
   if (pContext->dbConn == NULL || pContext->master == 0) return;
@@ -174,6 +186,9 @@ void cqStop(void *handle) {
 }
 
 void *cqCreate(void *handle, uint64_t uid, int32_t tid, char *sqlStr, STSchema *pSchema) {
+  if (tsEnableStream == 0) {
+    return NULL;
+  }
   SCqContext *pContext = handle;
 
   SCqObj *pObj = calloc(sizeof(SCqObj), 1);
@@ -203,6 +218,9 @@ void *cqCreate(void *handle, uint64_t uid, int32_t tid, char *sqlStr, STSchema *
 }
 
 void cqDrop(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqObj *pObj = handle;
   SCqContext *pContext = pObj->pContext;
 

src/vnode/src/vnodeMain.c

@@ -267,16 +267,18 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
     return terrno;
   }
 
-  SCqCfg cqCfg = {0};
-  sprintf(cqCfg.user, "_root");
-  strcpy(cqCfg.pass, tsInternalPass);
-  strcpy(cqCfg.db, pVnode->db);
-  cqCfg.vgId = vnode;
-  cqCfg.cqWrite = vnodeWriteToCache;
-  pVnode->cq = cqOpen(pVnode, &cqCfg);
-  if (pVnode->cq == NULL) {
-    vnodeCleanUp(pVnode);
-    return terrno;
+  if (tsEnableStream) {
+    SCqCfg cqCfg = {0};
+    sprintf(cqCfg.user, "_root");
+    strcpy(cqCfg.pass, tsInternalPass);
+    strcpy(cqCfg.db, pVnode->db);
+    cqCfg.vgId = vnode;
+    cqCfg.cqWrite = vnodeWriteToCache;
+    pVnode->cq = cqOpen(pVnode, &cqCfg);
+    if (pVnode->cq == NULL) {
+      vnodeCleanUp(pVnode);
+      return terrno;
+    }
   }
 
   STsdbAppH appH = {0};