chore: remove out-of-date example

examples/c/stream.c

-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
-
-#include <pthread.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "../../../include/client/taos.h"  // include TDengine header file
-
-typedef struct {
-	char  server_ip[64];
-    char  db_name[64];
-    char  tbl_name[64];
-} param;
-
-int g_thread_exit_flag = 0;
-void* insert_rows(void *sarg);
-
-void streamCallBack(void *param, TAOS_RES *res, TAOS_ROW row)
-{
-  // in this simple demo, it just print out the result
-  char temp[128];
-
-  TAOS_FIELD *fields = taos_fetch_fields(res);
-  int         numFields = taos_num_fields(res);
-
-  taos_print_row(temp, row, fields, numFields);
-
-  printf("\n%s\n", temp);
-}
-
-int main(int argc, char *argv[]) 
-{
-  TAOS       *taos;
-  char        db_name[64];
-  char        tbl_name[64];
-  char        sql[1024] = { 0 };
-
-  if (argc != 4) {
-    printf("usage: %s server-ip dbname tblname\n", argv[0]);
-    exit(0);
-  } 
-
-  strcpy(db_name, argv[2]);
-  strcpy(tbl_name, argv[3]);
-  
-  // create pthread to insert into row per second for stream calc
-  param *t_param = (param *)malloc(sizeof(param));
-  if (NULL == t_param)
-  {
-    printf("failed to malloc\n");
-    exit(1);
-  }
-  memset(t_param, 0, sizeof(param)); 
-  strcpy(t_param->server_ip, argv[1]);
-  strcpy(t_param->db_name, db_name);
-  strcpy(t_param->tbl_name, tbl_name);
-
-  pthread_t pid;
-  pthread_create(&pid, NULL, (void * (*)(void *))insert_rows, t_param);
-
-  sleep(3); // waiting for database is created.
-  // open connection to database
-  taos = taos_connect(argv[1], "root", "taosdata", db_name, 0);
-  if (taos == NULL) {
-    printf("failed to connet to server:%s\n", argv[1]);
-	  free(t_param);
-    exit(1);
-  }
-
-  // starting stream calc, 
-  printf("please input stream SQL:[e.g., select count(*) from tblname interval(5s) sliding(2s);]\n");
-  fgets(sql, sizeof(sql), stdin);
-  if (sql[0] == 0) {
-    printf("input NULL stream SQL, so exit!\n");	
-    free(t_param);
-    exit(1);
-  }
-
-  // param is set to NULL in this demo, it shall be set to the pointer to app context 
-  TAOS_STREAM *pStream = taos_open_stream(taos, sql, streamCallBack, 0, NULL, NULL);
-  if (NULL == pStream) {
-    printf("failed to create stream\n");	
-    free(t_param);
-    exit(1);
-  }
-  
-  printf("presss any key to exit\n");
-  getchar();
-
-  taos_close_stream(pStream);
-  
-  g_thread_exit_flag = 1;  
-  pthread_join(pid, NULL);
-
-  taos_close(taos);
-  free(t_param); 
-
-  return 0;
-}
-
-
-void* insert_rows(void *sarg)
-{
-  TAOS  *taos;
-  char    command[1024] = { 0 };
-  param  *winfo = (param * )sarg;
-
-  if (NULL == winfo){
-  	printf("para is null!\n");
-    exit(1);
-  }
-
-  taos = taos_connect(winfo->server_ip, "root", "taosdata", NULL, 0);
-  if (taos == NULL) {
-    printf("failed to connet to server:%s\n", winfo->server_ip);
-    exit(1);
-  }
-  
-  // drop database
-  sprintf(command, "drop database %s;", winfo->db_name);
-  if (taos_query(taos, command) != 0) {
-    printf("failed to drop database, reason:%s\n", taos_errstr(taos));
-    exit(1);
-  }
-
-  // create database
-  sprintf(command, "create database %s;", winfo->db_name);
-  if (taos_query(taos, command) != 0) {
-    printf("failed to create database, reason:%s\n", taos_errstr(taos));
-    exit(1);
-  }
-
-  // use database
-  sprintf(command, "use %s;", winfo->db_name);
-  if (taos_query(taos, command) != 0) {
-    printf("failed to use database, reason:%s\n", taos_errstr(taos));
-    exit(1);
-  }
-
-  // create table
-  sprintf(command, "create table %s (ts timestamp, speed int);", winfo->tbl_name);
-  if (taos_query(taos, command) != 0) {
-    printf("failed to create table, reason:%s\n", taos_errstr(taos));
-    exit(1);
-  }
-
-  // insert data
-  int64_t begin = (int64_t)time(NULL);
-  int index = 0;
-  while (1) {
-    if (g_thread_exit_flag) break;
-	
-    index++;
-    sprintf(command, "insert into %s values (%ld, %d)", winfo->tbl_name, (begin + index) * 1000, index);
-    if (taos_query(taos, command)) {
-      printf("failed to insert row [%s], reason:%s\n", command, taos_errstr(taos));
-    }
-    sleep(1);
-  }  
-
-  taos_close(taos);
-  return 0;
-}
-