/* * Copyright (c) 2019 TAOS Data, Inc. * * This program is free software: you can use, redistribute, and/or modify * it under the terms of the GNU Affero General Public License, version 3 * or later ("AGPL"), as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . */ #include "mndTopic.h" #include "mndAuth.h" #include "mndDb.h" #include "mndDnode.h" #include "mndMnode.h" #include "mndShow.h" #include "mndStb.h" #include "mndTrans.h" #include "mndUser.h" #include "mndVgroup.h" #include "parser.h" #include "tname.h" #define MND_TOPIC_VER_NUMBER 1 #define MND_TOPIC_RESERVE_SIZE 64 static int32_t mndTopicActionInsert(SSdb *pSdb, SMqTopicObj *pTopic); static int32_t mndTopicActionDelete(SSdb *pSdb, SMqTopicObj *pTopic); static int32_t mndTopicActionUpdate(SSdb *pSdb, SMqTopicObj *pTopic, SMqTopicObj *pNewTopic); static int32_t mndProcessCreateTopicReq(SNodeMsg *pReq); static int32_t mndProcessDropTopicReq(SNodeMsg *pReq); static int32_t mndProcessDropTopicInRsp(SNodeMsg *pRsp); static int32_t mndProcessTopicMetaReq(SNodeMsg *pReq); static int32_t mndGetTopicMeta(SNodeMsg *pReq, SShowObj *pShow, STableMetaRsp *pMeta); static int32_t mndRetrieveTopic(SNodeMsg *pReq, SShowObj *pShow, char *data, int32_t rows); static void mndCancelGetNextTopic(SMnode *pMnode, void *pIter); int32_t mndInitTopic(SMnode *pMnode) { SSdbTable table = {.sdbType = SDB_TOPIC, .keyType = SDB_KEY_BINARY, .encodeFp = (SdbEncodeFp)mndTopicActionEncode, .decodeFp = (SdbDecodeFp)mndTopicActionDecode, .insertFp = (SdbInsertFp)mndTopicActionInsert, .updateFp = (SdbUpdateFp)mndTopicActionUpdate, .deleteFp = (SdbDeleteFp)mndTopicActionDelete}; mndSetMsgHandle(pMnode, TDMT_MND_CREATE_TOPIC, mndProcessCreateTopicReq); mndSetMsgHandle(pMnode, TDMT_MND_DROP_TOPIC, mndProcessDropTopicReq); mndSetMsgHandle(pMnode, TDMT_VND_DROP_TOPIC_RSP, mndProcessDropTopicInRsp); mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_TP, mndRetrieveTopic); mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_TP, mndCancelGetNextTopic); return sdbSetTable(pMnode->pSdb, table); } void mndCleanupTopic(SMnode *pMnode) {} SSdbRaw *mndTopicActionEncode(SMqTopicObj *pTopic) { terrno = TSDB_CODE_OUT_OF_MEMORY; int32_t logicalPlanLen = strlen(pTopic->logicalPlan) + 1; int32_t physicalPlanLen = strlen(pTopic->physicalPlan) + 1; int32_t swLen = taosEncodeSSchemaWrapper(NULL, &pTopic->schema); int32_t size = sizeof(SMqTopicObj) + logicalPlanLen + physicalPlanLen + pTopic->sqlLen + swLen + MND_TOPIC_RESERVE_SIZE; SSdbRaw *pRaw = sdbAllocRaw(SDB_TOPIC, MND_TOPIC_VER_NUMBER, size); if (pRaw == NULL) goto TOPIC_ENCODE_OVER; int32_t dataPos = 0; SDB_SET_BINARY(pRaw, dataPos, pTopic->name, TSDB_TOPIC_FNAME_LEN, TOPIC_ENCODE_OVER); SDB_SET_BINARY(pRaw, dataPos, pTopic->db, TSDB_DB_FNAME_LEN, TOPIC_ENCODE_OVER); SDB_SET_INT64(pRaw, dataPos, pTopic->createTime, TOPIC_ENCODE_OVER); SDB_SET_INT64(pRaw, dataPos, pTopic->updateTime, TOPIC_ENCODE_OVER); SDB_SET_INT64(pRaw, dataPos, pTopic->uid, TOPIC_ENCODE_OVER); SDB_SET_INT64(pRaw, dataPos, pTopic->dbUid, TOPIC_ENCODE_OVER); SDB_SET_INT32(pRaw, dataPos, pTopic->version, TOPIC_ENCODE_OVER); SDB_SET_INT32(pRaw, dataPos, pTopic->sqlLen, TOPIC_ENCODE_OVER); SDB_SET_BINARY(pRaw, dataPos, pTopic->sql, pTopic->sqlLen, TOPIC_ENCODE_OVER); SDB_SET_INT32(pRaw, dataPos, logicalPlanLen, TOPIC_ENCODE_OVER); SDB_SET_BINARY(pRaw, dataPos, pTopic->logicalPlan, logicalPlanLen, TOPIC_ENCODE_OVER); SDB_SET_INT32(pRaw, dataPos, physicalPlanLen, TOPIC_ENCODE_OVER); SDB_SET_BINARY(pRaw, dataPos, pTopic->physicalPlan, physicalPlanLen, TOPIC_ENCODE_OVER); void *swBuf = taosMemoryMalloc(swLen); if (swBuf == NULL) { goto TOPIC_ENCODE_OVER; } void *aswBuf = swBuf; taosEncodeSSchemaWrapper(&aswBuf, &pTopic->schema); SDB_SET_INT32(pRaw, dataPos, swLen, TOPIC_ENCODE_OVER); SDB_SET_BINARY(pRaw, dataPos, swBuf, swLen, TOPIC_ENCODE_OVER); SDB_SET_RESERVE(pRaw, dataPos, MND_TOPIC_RESERVE_SIZE, TOPIC_ENCODE_OVER); SDB_SET_DATALEN(pRaw, dataPos, TOPIC_ENCODE_OVER); terrno = TSDB_CODE_SUCCESS; TOPIC_ENCODE_OVER: if (terrno != TSDB_CODE_SUCCESS) { mError("topic:%s, failed to encode to raw:%p since %s", pTopic->name, pRaw, terrstr()); sdbFreeRaw(pRaw); return NULL; } mTrace("topic:%s, encode to raw:%p, row:%p", pTopic->name, pRaw, pTopic); return pRaw; } SSdbRow *mndTopicActionDecode(SSdbRaw *pRaw) { terrno = TSDB_CODE_OUT_OF_MEMORY; int8_t sver = 0; if (sdbGetRawSoftVer(pRaw, &sver) != 0) goto TOPIC_DECODE_OVER; if (sver != MND_TOPIC_VER_NUMBER) { terrno = TSDB_CODE_SDB_INVALID_DATA_VER; goto TOPIC_DECODE_OVER; } int32_t size = sizeof(SMqTopicObj); SSdbRow *pRow = sdbAllocRow(size); if (pRow == NULL) goto TOPIC_DECODE_OVER; SMqTopicObj *pTopic = sdbGetRowObj(pRow); if (pTopic == NULL) goto TOPIC_DECODE_OVER; int32_t len; int32_t dataPos = 0; SDB_GET_BINARY(pRaw, dataPos, pTopic->name, TSDB_TOPIC_FNAME_LEN, TOPIC_DECODE_OVER); SDB_GET_BINARY(pRaw, dataPos, pTopic->db, TSDB_DB_FNAME_LEN, TOPIC_DECODE_OVER); SDB_GET_INT64(pRaw, dataPos, &pTopic->createTime, TOPIC_DECODE_OVER); SDB_GET_INT64(pRaw, dataPos, &pTopic->updateTime, TOPIC_DECODE_OVER); SDB_GET_INT64(pRaw, dataPos, &pTopic->uid, TOPIC_DECODE_OVER); SDB_GET_INT64(pRaw, dataPos, &pTopic->dbUid, TOPIC_DECODE_OVER); SDB_GET_INT32(pRaw, dataPos, &pTopic->version, TOPIC_DECODE_OVER); SDB_GET_INT32(pRaw, dataPos, &pTopic->sqlLen, TOPIC_DECODE_OVER); pTopic->sql = taosMemoryCalloc(pTopic->sqlLen + 1, sizeof(char)); SDB_GET_BINARY(pRaw, dataPos, pTopic->sql, pTopic->sqlLen, TOPIC_DECODE_OVER); SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER); pTopic->logicalPlan = taosMemoryCalloc(len + 1, sizeof(char)); if (pTopic->logicalPlan == NULL) { terrno = TSDB_CODE_OUT_OF_MEMORY; goto TOPIC_DECODE_OVER; } SDB_GET_BINARY(pRaw, dataPos, pTopic->logicalPlan, len, TOPIC_DECODE_OVER); SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER); pTopic->physicalPlan = taosMemoryCalloc(len + 1, sizeof(char)); if (pTopic->physicalPlan == NULL) { taosMemoryFree(pTopic->logicalPlan); terrno = TSDB_CODE_OUT_OF_MEMORY; goto TOPIC_DECODE_OVER; } SDB_GET_BINARY(pRaw, dataPos, pTopic->physicalPlan, len, TOPIC_DECODE_OVER); SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER); void *buf = taosMemoryMalloc(len); if (buf == NULL) { terrno = TSDB_CODE_OUT_OF_MEMORY; goto TOPIC_DECODE_OVER; } SDB_GET_BINARY(pRaw, dataPos, buf, len, TOPIC_DECODE_OVER); if (taosDecodeSSchemaWrapper(buf, &pTopic->schema) == NULL) { goto TOPIC_DECODE_OVER; } SDB_GET_RESERVE(pRaw, dataPos, MND_TOPIC_RESERVE_SIZE, TOPIC_DECODE_OVER); terrno = TSDB_CODE_SUCCESS; TOPIC_DECODE_OVER: if (terrno != TSDB_CODE_SUCCESS) { mError("topic:%s, failed to decode from raw:%p since %s", pTopic->name, pRaw, terrstr()); taosMemoryFreeClear(pRow); return NULL; } mTrace("topic:%s, decode from raw:%p, row:%p", pTopic->name, pRaw, pTopic); return pRow; } static int32_t mndTopicActionInsert(SSdb *pSdb, SMqTopicObj *pTopic) { mTrace("topic:%s, perform insert action", pTopic->name); return 0; } static int32_t mndTopicActionDelete(SSdb *pSdb, SMqTopicObj *pTopic) { mTrace("topic:%s, perform delete action", pTopic->name); return 0; } static int32_t mndTopicActionUpdate(SSdb *pSdb, SMqTopicObj *pOldTopic, SMqTopicObj *pNewTopic) { mTrace("topic:%s, perform update action", pOldTopic->name); atomic_exchange_64(&pOldTopic->updateTime, pNewTopic->updateTime); atomic_exchange_32(&pOldTopic->version, pNewTopic->version); taosWLockLatch(&pOldTopic->lock); // TODO handle update taosWUnLockLatch(&pOldTopic->lock); return 0; } SMqTopicObj *mndAcquireTopic(SMnode *pMnode, char *topicName) { SSdb *pSdb = pMnode->pSdb; SMqTopicObj *pTopic = sdbAcquire(pSdb, SDB_TOPIC, topicName); if (pTopic == NULL && terrno == TSDB_CODE_SDB_OBJ_NOT_THERE) { terrno = TSDB_CODE_MND_TOPIC_NOT_EXIST; } return pTopic; } void mndReleaseTopic(SMnode *pMnode, SMqTopicObj *pTopic) { SSdb *pSdb = pMnode->pSdb; sdbRelease(pSdb, pTopic); } static SDbObj *mndAcquireDbByTopic(SMnode *pMnode, char *topicName) { SName name = {0}; tNameFromString(&name, topicName, T_NAME_ACCT | T_NAME_DB | T_NAME_TABLE); char db[TSDB_TOPIC_FNAME_LEN] = {0}; tNameGetFullDbName(&name, db); return mndAcquireDb(pMnode, db); } static SDDropTopicReq *mndBuildDropTopicMsg(SMnode *pMnode, SVgObj *pVgroup, SMqTopicObj *pTopic) { int32_t contLen = sizeof(SDDropTopicReq); SDDropTopicReq *pDrop = taosMemoryCalloc(1, contLen); if (pDrop == NULL) { terrno = TSDB_CODE_OUT_OF_MEMORY; return NULL; } pDrop->head.contLen = htonl(contLen); pDrop->head.vgId = htonl(pVgroup->vgId); memcpy(pDrop->name, pTopic->name, TSDB_TOPIC_FNAME_LEN); pDrop->tuid = htobe64(pTopic->uid); return pDrop; } static int32_t mndCheckCreateTopicReq(SCMCreateTopicReq *pCreate) { if (pCreate->name[0] == 0 || pCreate->sql == NULL || pCreate->sql[0] == 0) { terrno = TSDB_CODE_MND_INVALID_TOPIC_OPTION; return -1; } return 0; } static int32_t mndGetPlanString(const SCMCreateTopicReq *pCreate, char **pStr) { if (NULL == pCreate->ast) { return TSDB_CODE_SUCCESS; } SNode *pAst = NULL; int32_t code = nodesStringToNode(pCreate->ast, &pAst); SQueryPlan *pPlan = NULL; if (TSDB_CODE_SUCCESS == code) { SPlanContext cxt = {.pAstRoot = pAst, .topicQuery = true}; code = qCreateQueryPlan(&cxt, &pPlan, NULL); } if (TSDB_CODE_SUCCESS == code) { code = nodesNodeToString(pPlan, false, pStr, NULL); } nodesDestroyNode(pAst); nodesDestroyNode(pPlan); terrno = code; return code; } static int32_t mndCreateTopic(SMnode *pMnode, SNodeMsg *pReq, SCMCreateTopicReq *pCreate, SDbObj *pDb) { mDebug("topic:%s to create", pCreate->name); SMqTopicObj topicObj = {0}; tstrncpy(topicObj.name, pCreate->name, TSDB_TOPIC_FNAME_LEN); tstrncpy(topicObj.db, pDb->name, TSDB_DB_FNAME_LEN); topicObj.createTime = taosGetTimestampMs(); topicObj.updateTime = topicObj.createTime; topicObj.uid = mndGenerateUid(pCreate->name, strlen(pCreate->name)); topicObj.dbUid = pDb->uid; topicObj.version = 1; topicObj.sql = pCreate->sql; topicObj.physicalPlan = ""; topicObj.logicalPlan = ""; topicObj.sqlLen = strlen(pCreate->sql); char *pPlanStr = NULL; if (TSDB_CODE_SUCCESS != mndGetPlanString(pCreate, &pPlanStr)) { mError("topic:%s, failed to get plan since %s", pCreate->name, terrstr()); return -1; } if (NULL != pPlanStr) { topicObj.physicalPlan = pPlanStr; } SNode *pAst = NULL; if (nodesStringToNode(pCreate->ast, &pAst) < 0) { return -1; } if (qExtractResultSchema(pAst, &topicObj.schema.nCols, &topicObj.schema.pSchema) != 0) { return -1; } STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_TYPE_CREATE_TOPIC, &pReq->rpcMsg); if (pTrans == NULL) { mError("topic:%s, failed to create since %s", pCreate->name, terrstr()); taosMemoryFreeClear(pPlanStr); return -1; } mDebug("trans:%d, used to create topic:%s", pTrans->id, pCreate->name); SSdbRaw *pRedoRaw = mndTopicActionEncode(&topicObj); if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) { mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr()); taosMemoryFreeClear(pPlanStr); mndTransDrop(pTrans); return -1; } sdbSetRawStatus(pRedoRaw, SDB_STATUS_READY); if (mndTransPrepare(pMnode, pTrans) != 0) { mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr()); taosMemoryFreeClear(pPlanStr); mndTransDrop(pTrans); return -1; } taosMemoryFreeClear(pPlanStr); mndTransDrop(pTrans); return 0; } static int32_t mndProcessCreateTopicReq(SNodeMsg *pReq) { SMnode *pMnode = pReq->pNode; int32_t code = -1; SMqTopicObj *pTopic = NULL; SDbObj *pDb = NULL; SUserObj *pUser = NULL; SCMCreateTopicReq createTopicReq = {0}; if (tDeserializeSCMCreateTopicReq(pReq->rpcMsg.pCont, pReq->rpcMsg.contLen, &createTopicReq) != 0) { terrno = TSDB_CODE_INVALID_MSG; goto CREATE_TOPIC_OVER; } mDebug("topic:%s, start to create, sql:%s", createTopicReq.name, createTopicReq.sql); if (mndCheckCreateTopicReq(&createTopicReq) != 0) { mError("topic:%s, failed to create since %s", createTopicReq.name, terrstr()); goto CREATE_TOPIC_OVER; } pTopic = mndAcquireTopic(pMnode, createTopicReq.name); if (pTopic != NULL) { if (createTopicReq.igExists) { mDebug("topic:%s, already exist, ignore exist is set", createTopicReq.name); code = 0; goto CREATE_TOPIC_OVER; } else { terrno = TSDB_CODE_MND_TOPIC_ALREADY_EXIST; goto CREATE_TOPIC_OVER; } } else if (terrno != TSDB_CODE_MND_TOPIC_NOT_EXIST) { goto CREATE_TOPIC_OVER; } pDb = mndAcquireDbByTopic(pMnode, createTopicReq.name); if (pDb == NULL) { terrno = TSDB_CODE_MND_DB_NOT_SELECTED; goto CREATE_TOPIC_OVER; } pUser = mndAcquireUser(pMnode, pReq->user); if (pUser == NULL) { goto CREATE_TOPIC_OVER; } if (mndCheckWriteAuth(pUser, pDb) != 0) { goto CREATE_TOPIC_OVER; } code = mndCreateTopic(pMnode, pReq, &createTopicReq, pDb); if (code == 0) code = TSDB_CODE_MND_ACTION_IN_PROGRESS; CREATE_TOPIC_OVER: if (code != 0 && code != TSDB_CODE_MND_ACTION_IN_PROGRESS) { mError("topic:%s, failed to create since %s", createTopicReq.name, terrstr()); } mndReleaseTopic(pMnode, pTopic); mndReleaseDb(pMnode, pDb); mndReleaseUser(pMnode, pUser); tFreeSCMCreateTopicReq(&createTopicReq); return code; } static int32_t mndDropTopic(SMnode *pMnode, SNodeMsg *pReq, SMqTopicObj *pTopic) { // TODO: cannot drop when subscribed STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_TYPE_DROP_TOPIC, &pReq->rpcMsg); if (pTrans == NULL) { mError("topic:%s, failed to drop since %s", pTopic->name, terrstr()); return -1; } mDebug("trans:%d, used to drop topic:%s", pTrans->id, pTopic->name); SSdbRaw *pRedoRaw = mndTopicActionEncode(pTopic); if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) { mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr()); mndTransDrop(pTrans); return -1; } sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPED); if (mndTransPrepare(pMnode, pTrans) != 0) { mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr()); mndTransDrop(pTrans); return -1; } mndTransDrop(pTrans); return 0; } static int32_t mndProcessDropTopicReq(SNodeMsg *pReq) { SMnode *pMnode = pReq->pNode; SMDropTopicReq dropReq = {0}; if (tDeserializeSMDropTopicReq(pReq->rpcMsg.pCont, pReq->rpcMsg.contLen, &dropReq) != 0) { terrno = TSDB_CODE_INVALID_MSG; return -1; } mDebug("topic:%s, start to drop", dropReq.name); SMqTopicObj *pTopic = mndAcquireTopic(pMnode, dropReq.name); if (pTopic == NULL) { if (dropReq.igNotExists) { mDebug("topic:%s, not exist, ignore not exist is set", dropReq.name); return 0; } else { terrno = TSDB_CODE_MND_TOPIC_NOT_EXIST; mError("topic:%s, failed to drop since %s", dropReq.name, terrstr()); return -1; } } int32_t code = mndDropTopic(pMnode, pReq, pTopic); mndReleaseTopic(pMnode, pTopic); if (code != 0) { terrno = code; mError("topic:%s, failed to drop since %s", dropReq.name, terrstr()); return -1; } return TSDB_CODE_MND_ACTION_IN_PROGRESS; } static int32_t mndProcessDropTopicInRsp(SNodeMsg *pRsp) { mndTransProcessRsp(pRsp); return 0; } static int32_t mndGetNumOfTopics(SMnode *pMnode, char *dbName, int32_t *pNumOfTopics) { SSdb *pSdb = pMnode->pSdb; SDbObj *pDb = mndAcquireDb(pMnode, dbName); if (pDb == NULL) { terrno = TSDB_CODE_MND_DB_NOT_SELECTED; return -1; } int32_t numOfTopics = 0; void *pIter = NULL; while (1) { SMqTopicObj *pTopic = NULL; pIter = sdbFetch(pSdb, SDB_TOPIC, pIter, (void **)&pTopic); if (pIter == NULL) break; if (pTopic->dbUid == pDb->uid) { numOfTopics++; } sdbRelease(pSdb, pTopic); } *pNumOfTopics = numOfTopics; mndReleaseDb(pMnode, pDb); return 0; } static int32_t mndGetTopicMeta(SNodeMsg *pReq, SShowObj *pShow, STableMetaRsp *pMeta) { SMnode *pMnode = pReq->pNode; SSdb *pSdb = pMnode->pSdb; if (mndGetNumOfTopics(pMnode, pShow->db, &pShow->numOfRows) != 0) { return -1; } int32_t cols = 0; SSchema *pSchema = pMeta->pSchemas; pShow->bytes[cols] = TSDB_TABLE_NAME_LEN + VARSTR_HEADER_SIZE; pSchema[cols].type = TSDB_DATA_TYPE_BINARY; strcpy(pSchema[cols].name, "name"); pSchema[cols].bytes = pShow->bytes[cols]; cols++; pShow->bytes[cols] = 8; pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP; strcpy(pSchema[cols].name, "create_time"); pSchema[cols].bytes = pShow->bytes[cols]; cols++; pShow->bytes[cols] = TSDB_SHOW_SQL_LEN + VARSTR_HEADER_SIZE; pSchema[cols].type = TSDB_DATA_TYPE_BINARY; strcpy(pSchema[cols].name, "sql"); pSchema[cols].bytes = pShow->bytes[cols]; cols++; pMeta->numOfColumns = cols; pShow->numOfColumns = cols; pShow->offset[0] = 0; for (int32_t i = 1; i < cols; ++i) { pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1]; } pShow->numOfRows = sdbGetSize(pSdb, SDB_TOPIC); pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1]; strcpy(pMeta->tbName, mndShowStr(pShow->type)); return 0; } static int32_t mndRetrieveTopic(SNodeMsg *pReq, SShowObj *pShow, char *data, int32_t rows) { SMnode *pMnode = pReq->pNode; SSdb *pSdb = pMnode->pSdb; int32_t numOfRows = 0; SMqTopicObj *pTopic = NULL; int32_t cols = 0; char *pWrite; char prefix[TSDB_DB_FNAME_LEN] = {0}; SDbObj *pDb = mndAcquireDb(pMnode, pShow->db); if (pDb == NULL) return 0; tstrncpy(prefix, pShow->db, TSDB_DB_FNAME_LEN); strcat(prefix, TS_PATH_DELIMITER); int32_t prefixLen = (int32_t)strlen(prefix); while (numOfRows < rows) { pShow->pIter = sdbFetch(pSdb, SDB_TOPIC, pShow->pIter, (void **)&pTopic); if (pShow->pIter == NULL) break; if (pTopic->dbUid != pDb->uid) { if (strncmp(pTopic->name, prefix, prefixLen) != 0) { mError("Inconsistent topic data, name:%s, db:%s, dbUid:%" PRIu64, pTopic->name, pDb->name, pDb->uid); } sdbRelease(pSdb, pTopic); continue; } cols = 0; char topicName[TSDB_TOPIC_NAME_LEN] = {0}; tstrncpy(topicName, pTopic->name + prefixLen, TSDB_TOPIC_NAME_LEN); pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows; STR_TO_VARSTR(pWrite, topicName); cols++; pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows; *(int64_t *)pWrite = pTopic->createTime; cols++; pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows; STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pTopic->sql, pShow->bytes[cols]); cols++; numOfRows++; sdbRelease(pSdb, pTopic); } mndReleaseDb(pMnode, pDb); pShow->numOfRows += numOfRows; mndVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow); return numOfRows; } static void mndCancelGetNextTopic(SMnode *pMnode, void *pIter) { SSdb *pSdb = pMnode->pSdb; sdbCancelFetch(pSdb, pIter); }