support udf

src/client/src/tscSQLParser.c

@@ -276,6 +276,7 @@ int32_t readFromFile(char *name, uint32_t *len, void **buf) {
 
 int32_t handleCreateFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   const char *msg1 = "function name is too long";
+  const char *msg2 = "path is too long";
   SSqlCmd *pCmd = &pSql->cmd;
   
   switch (pInfo->type) {
@@ -285,6 +286,8 @@ int32_t handleCreateFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     uint32_t len = 0;
     void *buf = NULL;
 
+    createInfo->name.z[createInfo->name.n] = 0;
+
     strdequote(createInfo->name.z);
 
     if (strlen(createInfo->name.z) >= TSDB_FUNC_NAME_LEN) {
@@ -296,6 +299,12 @@ int32_t handleCreateFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     createInfo->path.z[createInfo->path.n] = 0;
 
     strdequote(createInfo->path.z);
+
+    if (strlen(createInfo->path.z) >= PATH_MAX) {
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
+    }
+    
+    strcpy(pMsg->path, createInfo->path.z);
     
     int32_t ret = readFromFile(createInfo->path.z, &len, &buf);
     if (ret) {

src/client/src/tscServer.c

@@ -1300,8 +1300,20 @@ int32_t tscBuildShowMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
   }
 
+  SShowInfo *pShowInfo = &pInfo->pMiscInfo->showOpt;
+
   SShowMsg *pShowMsg = (SShowMsg *)pCmd->payload;
 
+  if (pShowInfo->showType == TSDB_MGMT_TABLE_FUNCTION) {
+    pShowMsg->type = pShowInfo->showType;
+
+    pShowMsg->payloadLen = 0;
+
+    pCmd->payloadLen = sizeof(SShowMsg);
+
+    return TSDB_CODE_SUCCESS;
+  }
+
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
 
   if (tNameIsEmpty(&pTableMetaInfo->name)) {    
@@ -1312,7 +1324,6 @@ int32_t tscBuildShowMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     tNameGetFullDbName(&pTableMetaInfo->name, pShowMsg->db);
   }
 
-  SShowInfo *pShowInfo = &pInfo->pMiscInfo->showOpt;
   pShowMsg->type = pShowInfo->showType;
 
   if (pShowInfo->showType != TSDB_MGMT_TABLE_VNODES) {

src/inc/taosmsg.h

@@ -572,6 +572,7 @@ typedef struct {
 
 typedef struct {
   char     name[TSDB_FUNC_NAME_LEN];
+  char     path[PATH_MAX];
   int32_t  codeLen;
   char     code[];
 } SCreateFuncMsg;

src/mnode/src/mnodeDb.c

@@ -48,7 +48,9 @@ static int32_t mnodeCreateFunc(SAcctObj *pAcct, SCreateFuncMsg *pCreate, SMnodeM
 static int32_t mnodeDropDb(SMnodeMsg *newMsg);
 static int32_t mnodeSetDbDropping(SDbObj *pDb);
 static int32_t mnodeGetDbMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn);
+static int32_t mnodeGetFuncMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn);
 static int32_t mnodeRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void *pConn);
+static int32_t mnodeRetrieveFuncs(SShowObj *pShow, char *data, int32_t rows, void *pConn);
 static int32_t mnodeProcessCreateDbMsg(SMnodeMsg *pMsg);
 static int32_t mnodeProcessCreateFuncMsg(SMnodeMsg *pMsg);
 static int32_t mnodeProcessDropDbMsg(SMnodeMsg *pMsg);
@@ -185,7 +187,9 @@ int32_t mnodeInitDbs() {
   mnodeAddWriteMsgHandle(TSDB_MSG_TYPE_CM_DROP_DB, mnodeProcessDropDbMsg);
   mnodeAddWriteMsgHandle(TSDB_MSG_TYPE_CM_DROP_FUNCTION, mnodeProcessDropFuncMsg);
   mnodeAddShowMetaHandle(TSDB_MGMT_TABLE_DB, mnodeGetDbMeta);
+  mnodeAddShowMetaHandle(TSDB_MGMT_TABLE_FUNCTION, mnodeGetFuncMeta);
   mnodeAddShowRetrieveHandle(TSDB_MGMT_TABLE_DB, mnodeRetrieveDbs);
+  mnodeAddShowRetrieveHandle(TSDB_MGMT_TABLE_FUNCTION, mnodeRetrieveFuncs);
   mnodeAddShowFreeIterHandle(TSDB_MGMT_TABLE_DB, mnodeCancelGetNextDb);
   
   mDebug("table:dbs table is created");
@@ -473,7 +477,7 @@ static int32_t mnodeCreateFunc(SAcctObj *pAcct, SCreateFuncMsg *pCreate, SMnodeM
   int32_t code = acctCheck(pAcct, ACCT_GRANT_DB);
   if (code != 0) return code;
 
-  mError("Function name:%s, code:%.*s", pCreate->name, pCreate->codeLen, pCreate->code);
+  mError("Function name:%s, path:%s, code:%.*s", pCreate->name, pCreate->path, pCreate->codeLen, pCreate->code);
 
   return code;
 }
@@ -545,6 +549,9 @@ void mnodeCleanupDbs() {
   tsDbSdb = NULL;
 }
 
+
+
+
 static int32_t mnodeGetDbMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
   int32_t cols = 0;
 
@@ -700,6 +707,41 @@ static int32_t mnodeGetDbMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn
   return 0;
 }
 
+static int32_t mnodeGetFuncMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
+  int32_t cols = 0;
+
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = (TSDB_FUNC_NAME_LEN - 1) + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = PATH_MAX + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "path");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(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->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+
+  //TODO GET ROWS NUM
+  
+  pShow->numOfRows = 1;
+
+  return 0;
+}
+
+
 char *mnodeGetDbStr(char *src) {
   char *pos = strstr(src, TS_PATH_DELIMITER);
   if (pos != NULL) ++pos;
@@ -847,6 +889,36 @@ static int32_t mnodeRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void
   return numOfRows;
 }
 
+
+static int32_t mnodeRetrieveFuncs(SShowObj *pShow, char *data, int32_t rows, void *pConn) {
+  int32_t numOfRows = 0;
+  char *  pWrite;
+  int32_t cols = 0;
+
+  while (numOfRows < rows) {
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;  
+
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, "aaa", pShow->bytes[cols]);
+
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, "/tmp/abc", pShow->bytes[cols]);
+    cols++;
+
+    numOfRows++;
+  }
+
+  pShow->numOfReads += numOfRows;
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+
+  return numOfRows;
+}
+
+
+
 void mnodeAddSuperTableIntoDb(SDbObj *pDb) {
   atomic_add_fetch_32(&pDb->numOfSuperTables, 1);
 }