diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 763b3f5c22f6e055d0e0f8da5e55efa189a985f4..b5252502a3278250036983da6dc73ee068b068a3 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -607,7 +607,7 @@ static void doInitGlobalConfig() {
   cfg.minValue = TSDB_MIN_CACHE_BLOCK_SIZE;
   cfg.maxValue = TSDB_MAX_CACHE_BLOCK_SIZE;
   cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_BYTE;
+  cfg.unitType = TAOS_CFG_UTYPE_Mb;
   taosInitConfigOption(cfg);
 
   cfg.option = "blocks";
@@ -617,7 +617,7 @@ static void doInitGlobalConfig() {
   cfg.minValue = TSDB_MIN_TOTAL_BLOCKS;
   cfg.maxValue = TSDB_MAX_TOTAL_BLOCKS;
   cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_BYTE;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
   cfg.option = "days";
diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index bee68b81f567bf0259edea33e944a4aa074ccdaa..341dee14769271103b8e508dab22f287bb329a99 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -92,6 +92,7 @@ typedef struct {
   STSchema * schema;
   STSchema * tagSchema;
   SDataRow   tagValues;
+  char *     sql;
 } STableCfg;
 
 int  tsdbInitTableCfg(STableCfg *config, ETableType type, uint64_t uid, int32_t tid);
@@ -101,6 +102,7 @@ int  tsdbTableSetTagSchema(STableCfg *config, STSchema *pSchema, bool dup);
 int  tsdbTableSetTagValue(STableCfg *config, SDataRow row, bool dup);
 int  tsdbTableSetName(STableCfg *config, char *name, bool dup);
 int  tsdbTableSetSName(STableCfg *config, char *sname, bool dup);
+int  tsdbTableSetStreamSql(STableCfg *config, char *sql, bool dup);
 void tsdbClearTableCfg(STableCfg *config);
 
 int32_t tsdbGetTableTagVal(TsdbRepoT *repo, STableId* id, int32_t colId, int16_t *type, int16_t *bytes, char **val);
diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 63d3eb349b75717895441c0e2661b86db3db2c67..0839e0f8ff786d6d72cfdf301ec58cd20401b685 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -85,12 +85,13 @@ typedef struct STable {
   TSKEY          lastKey;        // lastkey inserted in this table, initialized as 0, TODO: make a structure
   struct STable *next;           // TODO: remove the next
   struct STable *prev;
-  tstr *         name;           // NOTE: there a flexible string here
+  tstr *         name;  // NOTE: there a flexible string here
+  char *         sql;
 } STable;
 
 #define TSDB_GET_TABLE_LAST_KEY(tb) ((tb)->lastKey)
 
-void *  tsdbEncodeTable(STable *pTable, int *contLen);
+void    tsdbEncodeTable(STable *pTable, char *buf, int *contLen);
 STable *tsdbDecodeTable(void *cont, int contLen);
 void    tsdbFreeEncode(void *cont);
 
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 27473e805c1ddc0c06d8c77c3bfebe4efc0faafe..bddb3fcaff997f8589b28bc200c7a33ecf2e8a16 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -446,7 +446,7 @@ int32_t tsdbInsertData(TsdbRepoT *repo, SSubmitMsg *pMsg, SShellSubmitRspMsg * p
  */
 int tsdbInitTableCfg(STableCfg *config, ETableType type, uint64_t uid, int32_t tid) {
   if (config == NULL) return -1;
-  if (type != TSDB_NORMAL_TABLE && type != TSDB_CHILD_TABLE) return -1;
+  if (type != TSDB_CHILD_TABLE && type != TSDB_NORMAL_TABLE && type != TSDB_STREAM_TABLE) return -1;
 
   memset((void *)config, 0, sizeof(STableCfg));
 
@@ -455,6 +455,7 @@ int tsdbInitTableCfg(STableCfg *config, ETableType type, uint64_t uid, int32_t t
   config->tableId.uid = uid;
   config->tableId.tid = tid;
   config->name = NULL;
+  config->sql = NULL;
   return 0;
 }
 
@@ -540,12 +541,26 @@ int tsdbTableSetSName(STableCfg *config, char *sname, bool dup) {
   return 0;
 }
 
+int tsdbTableSetStreamSql(STableCfg *config, char *sql, bool dup) {
+  if (config->type != TSDB_STREAM_TABLE) return -1;
+  
+  if (dup) {
+    config->sql = strdup(sql);
+    if (config->sql == NULL) return -1;
+  } else {
+    config->sql = sql;
+  }
+
+  return 0;
+}
+
 void tsdbClearTableCfg(STableCfg *config) {
   if (config->schema) tdFreeSchema(config->schema);
   if (config->tagSchema) tdFreeSchema(config->tagSchema);
   if (config->tagValues) tdFreeDataRow(config->tagValues);
   tfree(config->name);
   tfree(config->sname);
+  tfree(config->sql);
 }
 
 int tsdbInitSubmitBlkIter(SSubmitBlk *pBlock, SSubmitBlkIter *pIter) {
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index 37a10bb06971d6bba01334ad3b79dfc509336d53..e320de9827c26d02bb2ff6277a90f591e7d06ed9 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -15,7 +15,6 @@ static int32_t tsdbCheckTableCfg(STableCfg *pCfg);
 static int     tsdbAddTableToMeta(STsdbMeta *pMeta, STable *pTable, bool addIdx);
 static int     tsdbAddTableIntoIndex(STsdbMeta *pMeta, STable *pTable);
 static int     tsdbRemoveTableFromIndex(STsdbMeta *pMeta, STable *pTable);
-static int     tsdbEstimateTableEncodeSize(STable *pTable);
 static int     tsdbRemoveTableFromMeta(STsdbMeta *pMeta, STable *pTable, bool rmFromIdx);
 
 /**
@@ -28,16 +27,10 @@ static int     tsdbRemoveTableFromMeta(STsdbMeta *pMeta, STable *pTable, bool rm
  * @return binary content for success
  *         NULL fro failure
  */
-void *tsdbEncodeTable(STable *pTable, int *contLen) {
-  if (pTable == NULL) return NULL;
-
-  *contLen = tsdbEstimateTableEncodeSize(pTable);
-  if (*contLen < 0) return NULL;
-
-  void *ret = calloc(1, *contLen);
-  if (ret == NULL) return NULL;
+void tsdbEncodeTable(STable *pTable, char *buf, int *contLen) {
+  if (pTable == NULL) return;
 
-  void *ptr = ret;
+  void *ptr = buf;
   T_APPEND_MEMBER(ptr, pTable, STable, type);
   // Encode name, todo refactor
   *(int *)ptr = varDataLen(pTable->name);
@@ -55,11 +48,16 @@ void *tsdbEncodeTable(STable *pTable, int *contLen) {
     ptr = tdEncodeSchema(ptr, pTable->tagSchema);
   } else if (pTable->type == TSDB_CHILD_TABLE) {
     tdTagRowCpy(ptr, pTable->tagVal);
+    ptr = POINTER_SHIFT(ptr, dataRowLen(pTable->tagVal) + ((STagRow *)pTable->tagVal)->dataLen);
   } else {
     ptr = tdEncodeSchema(ptr, pTable->schema);
   }
 
-  return ret;
+  if (pTable->type == TSDB_STREAM_TABLE) {
+    ptr = taosEncodeString(ptr, pTable->sql);
+  }
+
+  *contLen = (char *)ptr - buf;
 }
 
 /**
@@ -97,10 +95,15 @@ STable *tsdbDecodeTable(void *cont, int contLen) {
     pTable->tagSchema = tdDecodeSchema(&ptr);
   } else if (pTable->type == TSDB_CHILD_TABLE) {
     pTable->tagVal = tdTagRowDecode(ptr);
+    ptr = POINTER_SHIFT(ptr, dataRowLen(pTable->tagVal) + ((STagRow *)pTable->tagVal)->dataLen);
   } else {
     pTable->schema = tdDecodeSchema(&ptr);
   }
 
+  if (pTable->type == TSDB_STREAM_TABLE) {
+    ptr = taosDecodeString(ptr, &(pTable->sql));
+  }
+
   return pTable;
 }
 
@@ -213,7 +216,7 @@ int32_t tsdbFreeMeta(STsdbMeta *pMeta) {
 }
 
 STSchema *tsdbGetTableSchema(STsdbMeta *pMeta, STable *pTable) {
-  if (pTable->type == TSDB_NORMAL_TABLE || pTable->type == TSDB_SUPER_TABLE) {
+  if (pTable->type == TSDB_NORMAL_TABLE || pTable->type == TSDB_SUPER_TABLE || pTable->type == TSDB_STREAM_TABLE) {
     return pTable->schema;
   } else if (pTable->type == TSDB_CHILD_TABLE) {
     STable *pSuper = tsdbGetTableByUid(pMeta, pTable->superUid);
@@ -286,6 +289,76 @@ char* tsdbGetTableName(TsdbRepoT *repo, const STableId* id, int16_t* bytes) {
   }
 }
 
+static STable *tsdbNewTable(STableCfg *pCfg, bool isSuper) {
+  STable *pTable = NULL;
+  size_t  tsize = 0;
+
+  pTable = (STable *)calloc(1, sizeof(STable));
+  if (pTable == NULL) {
+    terrno = TSDB_CODE_SERV_OUT_OF_MEMORY;
+    goto _err;
+  }
+
+  pTable->type = pCfg->type;
+
+  if (isSuper) {
+    pTable->type = TSDB_SUPER_TABLE;
+    pTable->tableId.uid = pCfg->superUid;
+    pTable->tableId.tid = -1;
+    pTable->superUid = TSDB_INVALID_SUPER_TABLE_ID;
+    pTable->schema = tdDupSchema(pCfg->schema);
+    pTable->tagSchema = tdDupSchema(pCfg->tagSchema);
+
+    tsize = strnlen(pCfg->sname, TSDB_TABLE_NAME_LEN);
+    pTable->name = calloc(1, tsize + VARSTR_HEADER_SIZE + 1);
+    if (pTable->name == NULL) {
+      terrno = TSDB_CODE_SERV_OUT_OF_MEMORY;
+      goto _err;
+    }
+    STR_WITH_SIZE_TO_VARSTR(pTable->name, pCfg->sname, tsize);
+
+    STColumn *pColSchema = schemaColAt(pTable->tagSchema, 0);
+    pTable->pIndex = tSkipListCreate(TSDB_SUPER_TABLE_SL_LEVEL, pColSchema->type, pColSchema->bytes, 1, 0, 0,
+                                     getTagIndexKey);  // Allow duplicate key, no lock
+    if (pTable->pIndex == NULL) {
+      terrno = TSDB_CODE_SERV_OUT_OF_MEMORY;
+      goto _err;
+    }
+  } else {
+    pTable->type = pCfg->type;
+    pTable->tableId.uid = pCfg->tableId.uid;
+    pTable->tableId.tid = pCfg->tableId.tid;
+    pTable->lastKey = TSKEY_INITIAL_VAL;
+
+    tsize = strnlen(pCfg->name, TSDB_TABLE_NAME_LEN);
+    pTable->name = calloc(1, tsize + VARSTR_HEADER_SIZE + 1);
+    if (pTable->name == NULL) {
+      terrno = TSDB_CODE_SERV_OUT_OF_MEMORY;
+      goto _err;
+    }
+    STR_WITH_SIZE_TO_VARSTR(pTable->name, pCfg->name, tsize);
+
+    if (pCfg->type == TSDB_CHILD_TABLE) {
+      pTable->superUid = pCfg->superUid;
+      pTable->tagVal = tdDataRowDup(pCfg->tagValues);
+    } else if (pCfg->type == TSDB_NORMAL_TABLE) {
+      pTable->superUid = -1;
+      pTable->schema = tdDupSchema(pCfg->schema);
+    } else {
+      ASSERT(pCfg->type == TSDB_STREAM_TABLE);
+      pTable->superUid = -1;
+      pTable->schema = tdDupSchema(pCfg->schema);
+      pTable->sql = strdup(pCfg->sql);
+    }
+  }
+
+  return pTable;
+
+_err:
+  tsdbFreeTable(pTable);
+  return NULL;
+}
+
 int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg) {
   STsdbRepo *pRepo = (STsdbRepo *)repo;
   STsdbMeta *pMeta = pRepo->tsdbMeta;
@@ -306,61 +379,19 @@ int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg) {
     super = tsdbGetTableByUid(pMeta, pCfg->superUid);
     if (super == NULL) {  // super table not exists, try to create it
       newSuper = 1;
-      // TODO: use function to implement create table object
-      super = (STable *)calloc(1, sizeof(STable));
+      super = tsdbNewTable(pCfg, true);
       if (super == NULL) return -1;
-
-      super->type = TSDB_SUPER_TABLE;
-      super->tableId.uid = pCfg->superUid;
-      super->tableId.tid = -1;
-      super->superUid = TSDB_INVALID_SUPER_TABLE_ID;
-      super->schema = tdDupSchema(pCfg->schema);
-      super->tagSchema = tdDupSchema(pCfg->tagSchema);
-      super->tagVal = NULL;
-      
-      // todo refactor extract method
-      size_t size = strnlen(pCfg->sname, TSDB_TABLE_NAME_LEN);
-      super->name = calloc(1, size + VARSTR_HEADER_SIZE + 1);
-      STR_WITH_SIZE_TO_VARSTR(super->name, pCfg->sname, size);
-
-      // index the first tag column
-      STColumn* pColSchema = schemaColAt(super->tagSchema, 0);
-      super->pIndex = tSkipListCreate(TSDB_SUPER_TABLE_SL_LEVEL, pColSchema->type, pColSchema->bytes,
-          1, 0, 1, getTagIndexKey);  // Allow duplicate key, no lock
-
-      if (super->pIndex == NULL) {
-        tdFreeSchema(super->schema);
-        tdFreeSchema(super->tagSchema);
-        tdFreeTagRow(super->tagVal);
-        free(super);
-        return -1;
-      }
     } else {
       if (super->type != TSDB_SUPER_TABLE) return -1;
     }
   }
 
-  STable *table = (STable *)calloc(1, sizeof(STable));
+  STable *table = tsdbNewTable(pCfg, false);
   if (table == NULL) {
-    if (newSuper) tsdbFreeTable(super);
-    return -1;
-  }
-
-  table->tableId = pCfg->tableId;
-  
-  size_t size = strnlen(pCfg->name, TSDB_TABLE_NAME_LEN);
-  table->name = calloc(1, size + VARSTR_HEADER_SIZE + 1);
-  STR_WITH_SIZE_TO_VARSTR(table->name, pCfg->name, size);
-  
-  table->lastKey = 0;
-  if (IS_CREATE_STABLE(pCfg)) { // TSDB_CHILD_TABLE
-    table->type = TSDB_CHILD_TABLE;
-    table->superUid = pCfg->superUid;
-    table->tagVal = tdTagRowDup(pCfg->tagValues);
-  } else { // TSDB_NORMAL_TABLE
-    table->type = TSDB_NORMAL_TABLE;
-    table->superUid = -1;
-    table->schema = tdDupSchema(pCfg->schema);
+    if (newSuper) {
+      tsdbFreeTable(super);
+      return -1;
+    }
   }
 
   // Register to meta
@@ -375,15 +406,15 @@ int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg) {
 
   // Write to meta file
   int bufLen = 0;
+  char *buf = malloc(1024*1024);
   if (newSuper) {
-    void *buf = tsdbEncodeTable(super, &bufLen);
+    tsdbEncodeTable(super, buf, &bufLen);
     tsdbInsertMetaRecord(pMeta->mfh, super->tableId.uid, buf, bufLen);
-    tsdbFreeEncode(buf);
   }
 
-  void *buf = tsdbEncodeTable(table, &bufLen);
+  tsdbEncodeTable(table, buf, &bufLen);
   tsdbInsertMetaRecord(pMeta->mfh, table->tableId.uid, buf, bufLen);
-  tsdbFreeEncode(buf);
+  tfree(buf);
 
   return 0;
 }
@@ -441,13 +472,18 @@ static void tsdbFreeMemTable(SMemTable *pMemTable) {
 }
 
 static int tsdbFreeTable(STable *pTable) {
-  // TODO: finish this function
+  if (pTable == NULL) return 0;
+
   if (pTable->type == TSDB_CHILD_TABLE) {
     tdFreeTagRow(pTable->tagVal);
   } else {
     tdFreeSchema(pTable->schema);
   }
 
+  if (pTable->type == TSDB_STREAM_TABLE) {
+    tfree(pTable->sql);
+  }
+
   // Free content
   if (TSDB_TABLE_IS_SUPER_TABLE(pTable)) {
     tdFreeSchema(pTable->tagSchema);
@@ -494,6 +530,9 @@ static int tsdbAddTableToMeta(STsdbMeta *pMeta, STable *pTable, bool addIdx) {
     if (pTable->type == TSDB_CHILD_TABLE && addIdx) { // add STABLE to the index
       tsdbAddTableIntoIndex(pMeta, pTable);
     }
+    if (pTable->type == TSDB_STREAM_TABLE && addIdx) {
+      // TODO
+    }
     
     pMeta->nTables++;
   }
@@ -525,7 +564,6 @@ static int tsdbRemoveTableFromMeta(STsdbMeta *pMeta, STable *pTable, bool rmFrom
 
     tSkipListDestroyIter(pIter);
 
-    // TODO: Remove the table from the list
     if (pTable->prev != NULL) {
       pTable->prev->next = pTable->next;
       if (pTable->next != NULL) {
@@ -539,6 +577,9 @@ static int tsdbRemoveTableFromMeta(STsdbMeta *pMeta, STable *pTable, bool rmFrom
     if (pTable->type == TSDB_CHILD_TABLE && rmFromIdx) {
       tsdbRemoveTableFromIndex(pMeta, pTable);
     }
+    if (pTable->type == TSDB_STREAM_TABLE && rmFromIdx) {
+      // TODO
+    }
 
     pMeta->nTables--;
   }
@@ -603,26 +644,6 @@ static int tsdbRemoveTableFromIndex(STsdbMeta *pMeta, STable *pTable) {
   return 0;
 }
 
-static int tsdbEstimateTableEncodeSize(STable *pTable) {
-  int size = 0;
-  size += T_MEMBER_SIZE(STable, type);
-  size += sizeof(int) + varDataLen(pTable->name);
-  size += T_MEMBER_SIZE(STable, tableId);
-  size += T_MEMBER_SIZE(STable, superUid);
-  size += T_MEMBER_SIZE(STable, sversion);
-
-  if (pTable->type == TSDB_SUPER_TABLE) {
-    size += tdGetSchemaEncodeSize(pTable->schema);
-    size += tdGetSchemaEncodeSize(pTable->tagSchema);
-  } else if (pTable->type == TSDB_CHILD_TABLE) {
-    STagRow *pTagRow = (STagRow *)(pTable->tagVal);
-    size += dataRowLen(pTable->tagVal) + pTagRow->dataLen;
-  } else {
-    size += tdGetSchemaEncodeSize(pTable->schema);
-  }
-
-  return size;
-}
 
 char *getTSTupleKey(const void * data) {
   SDataRow row = (SDataRow)data;
diff --git a/src/util/inc/tcoding.h b/src/util/inc/tcoding.h
index b4f7f596c56ff6bde8242881d1f8e06a7264986a..cc9caf71d04bdceba3dab1916470d8803863992f 100644
--- a/src/util/inc/tcoding.h
+++ b/src/util/inc/tcoding.h
@@ -217,6 +217,28 @@ static FORCE_INLINE void *taosDecodeVariant64(void *buf, uint64_t *value) {
   return NULL;  // error happened
 }
 
+static FORCE_INLINE void *taosEncodeString(void *buf, char *value) {
+  size_t size = strlen(value);
+
+  buf = taosEncodeVariant64(buf, size);
+  memcpy(buf, value, size);
+
+  return POINTER_SHIFT(buf, size);
+}
+
+static FORCE_INLINE void *taosDecodeString(void *buf, char **value) {
+  uint64_t size = 0;
+
+  buf = taosDecodeVariant64(buf, &size);
+  *value = (char *)malloc(size + 1);
+  if (*value == NULL) return NULL;
+  memcpy(*value, buf, size);
+
+  (*value)[size] = '\0';
+
+  return POINTER_SHIFT(buf, size);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index 96ca19e1294de876339ebac6d3ee055feceaacd8..6854dd3c78d98d9b0cab0bdd41cdb6867d5cb7cb 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -106,6 +106,7 @@ static int32_t vnodeProcessSubmitMsg(SVnodeObj *pVnode, void *pCont, SRspRet *pR
 static int32_t vnodeProcessCreateTableMsg(SVnodeObj *pVnode, void *pCont, SRspRet *pRet) {
   SMDCreateTableMsg *pTable = pCont;
   int32_t code = 0;
+  char sql[1024] = "\0";
 
   vTrace("vgId:%d, table:%s, start to create", pVnode->vgId, pTable->tableId);
   int16_t   numOfColumns = htons(pTable->numOfColumns);
@@ -151,6 +152,11 @@ static int32_t vnodeProcessCreateTableMsg(SVnodeObj *pVnode, void *pCont, SRspRe
     tsdbTableSetTagValue(&tCfg, dataRow, false);
   }
 
+  if (pTable->tableType == TSDB_STREAM_TABLE) {
+    // TODO: set sql value
+    tsdbTableSetStreamSql(&tCfg, sql, false);
+  }
+
   code = tsdbCreateTable(pVnode->tsdb, &tCfg);
   tdFreeDataRow(dataRow);
   tfree(pDestTagSchema);