111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// TAOS standard API example. The same syntax as MySQL, but only a subet
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// to compile: gcc -o demo demo.c -ltaos
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <taos.h> // TAOS header file
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void taosMsleep(int mseconds);
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int main(int argc, char *argv[]) {
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TAOS * taos;
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char qstr[1024];
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TAOS_RES *result;
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// connect to server
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if (argc < 2) {
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printf("please input server-ip \n");
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return 0;
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}
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// init TAOS
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taos_init();
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taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
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if (taos == NULL) {
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printf("failed to connect to server, reason:%s\n", taos_errstr(taos));
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exit(1);
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}
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printf("success to connect to server\n");
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taos_query(taos, "drop database demo");
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if (taos_query(taos, "create database demo") != 0) {
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printf("failed to create database, reason:%s\n", taos_errstr(taos));
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exit(1);
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}
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printf("success to create database\n");
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taos_query(taos, "use demo");
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// create table
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if (taos_query(taos, "create table m1 (ts timestamp, speed int)") != 0) {
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printf("failed to create table, reason:%s\n", taos_errstr(taos));
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exit(1);
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}
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printf("success to create table\n");
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// sleep for one second to make sure table is created on data node
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// taosMsleep(1000);
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// insert 10 records
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int i = 0;
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for (i = 0; i < 10; ++i) {
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sprintf(qstr, "insert into m1 values (now+%ds, %d)", i, i * 10);
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if (taos_query(taos, qstr)) {
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printf("failed to insert row: %i, reason:%s\n", i, taos_errstr(taos));
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}
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//sleep(1);
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}
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printf("success to insert rows, total %d rows\n", i);
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// query the records
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sprintf(qstr, "SELECT * FROM m1");
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if (taos_query(taos, qstr) != 0) {
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printf("failed to select, reason:%s\n", taos_errstr(taos));
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exit(1);
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}
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result = taos_use_result(taos);
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if (result == NULL) {
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printf("failed to get result, reason:%s\n", taos_errstr(taos));
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exit(1);
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}
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TAOS_ROW row;
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int rows = 0;
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int num_fields = taos_field_count(taos);
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TAOS_FIELD *fields = taos_fetch_fields(result);
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char temp[256];
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printf("select * from table, result:\n");
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// fetch the records row by row
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while ((row = taos_fetch_row(result))) {
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rows++;
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taos_print_row(temp, row, fields, num_fields);
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printf("%s\n", temp);
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}
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taos_free_result(result);
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printf("====demo end====\n\n");
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return getchar();
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}
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