C/C++ Connector
C/C++ 开发人员可以使用 TDengine 的客户端驱动，即 C/C++连接器 （以下都用 TDengine 客户端驱动表示），开发自己的应用来连接 TDengine 集群完成数据存储、查询以及其他功能。TDengine 客户端驱动的 API 类似于 MySQL 的 C API。应用程序使用时，需要包含 TDengine 头文件 taos.h，里面列出了提供的 API 的函数原型；应用程序还要链接到所在平台上对应的动态库。
#include <taos.h>
TDengine 服务端或客户端安装后，taos.h 位于：
- Linux：
/usr/local/taos/include - Windows：
C:\TDengine\include
TDengine 客户端驱动的动态库位于：
- Linux:
/usr/local/taos/driver/libtaos.so - Windows:
C:\TDengine\taos.dll
支持的平台
请参考支持的平台列表
支持的版本
TDengine 客户端驱动的版本号与 TDengine 服务端的版本号是一一对应的强对应关系，建议使用与 TDengine 服务端完全相同的客户端驱动。虽然低版本的客户端驱动在前三段版本号一致（即仅第四段版本号不同）的情况下也能够与高版本的服务端相兼容，但这并非推荐用法。强烈不建议使用高版本的客户端驱动访问低版本的服务端。
安装步骤
TDengine 客户端驱动的安装请参考 安装指南
建立连接
使用客户端驱动访问 TDengine 集群的基本过程为：建立连接、查询和写入、关闭连接、清除资源。
下面为建立连接的示例代码，其中省略了查询和写入部分，展示了如何建立连接、关闭连接以及清除资源。
TAOS *taos = taos_connect("localhost:6030", "root", "taosdata", NULL, 0);
if (taos == NULL) {
printf("failed to connect to server, reason:%s\n", "null taos" /*taos_errstr(taos)*/);
exit(1);
}
/* put your code here for read and write */
taos_close(taos);
taos_cleanup();
在上面的示例代码中， taos_connect() 建立到客户端程序所在主机的 6030 端口的连接，taos_close()关闭当前连接，taos_cleanup()清除客户端驱动所申请和使用的资源。
备注
- 如未特别说明，当 API 的返回值是整数时，0 代表成功，其它是代表失败原因的错误码，当返回值是指针时， NULL 表示失败。
- 所有的错误码以及对应的原因描述在
taoserror.h文件中。
示例程序
本节展示了使用客户端驱动访问 TDengine 集群的常见访问方式的示例代码。
同步查询示例
同步查询
/*
* 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/>.
*/
// TAOS standard API example. The same syntax as MySQL, but only a subset
// to compile: gcc -o demo demo.c -ltaos
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h> // TAOS header file
static void queryDB(TAOS *taos, char *command) {
int i;
TAOS_RES *pSql = NULL;
int32_t code = -1;
for (i = 0; i < 5; i++) {
if (NULL != pSql) {
taos_free_result(pSql);
pSql = NULL;
}
pSql = taos_query(taos, command);
code = taos_errno(pSql);
if (0 == code) {
break;
}
}
if (code != 0) {
fprintf(stderr, "Failed to run %s, reason: %s\n", command, taos_errstr(pSql));
taos_free_result(pSql);
taos_close(taos);
exit(EXIT_FAILURE);
}
taos_free_result(pSql);
}
void Test(TAOS *taos, char *qstr, int i);
int main(int argc, char *argv[]) {
char qstr[1024];
// connect to server
if (argc < 2) {
printf("please input server-ip \n");
return 0;
}
TAOS *taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
if (taos == NULL) {
printf("failed to connect to server, reason:%s\n", "null taos" /*taos_errstr(taos)*/);
exit(1);
}
for (int i = 0; i < 100; i++) {
Test(taos, qstr, i);
}
taos_close(taos);
taos_cleanup();
}
void Test(TAOS *taos, char *qstr, int index) {
printf("==================test at %d\n================================", index);
queryDB(taos, "drop database if exists demo");
queryDB(taos, "create database demo");
TAOS_RES *result;
queryDB(taos, "use demo");
queryDB(taos,
"create table m1 (ts timestamp, ti tinyint, si smallint, i int, bi bigint, f float, d double, b binary(10))");
printf("success to create table\n");
int i = 0;
for (i = 0; i < 10; ++i) {
sprintf(qstr, "insert into m1 values (%" PRId64 ", %d, %d, %d, %d, %f, %lf, '%s')",
(uint64_t)(1546300800000 + i * 1000), i, i, i, i * 10000000, i * 1.0, i * 2.0, "hello");
printf("qstr: %s\n", qstr);
// note: how do you wanna do if taos_query returns non-NULL
// if (taos_query(taos, qstr)) {
// printf("insert row: %i, reason:%s\n", i, taos_errstr(taos));
// }
TAOS_RES *result1 = taos_query(taos, qstr);
if (result1 == NULL || taos_errno(result1) != 0) {
printf("failed to insert row, reason:%s\n", taos_errstr(result1));
taos_free_result(result1);
exit(1);
} else {
printf("insert row: %i\n", i);
}
taos_free_result(result1);
}
printf("success to insert rows, total %d rows\n", i);
// query the records
sprintf(qstr, "SELECT * FROM m1");
result = taos_query(taos, qstr);
if (result == NULL || taos_errno(result) != 0) {
printf("failed to select, reason:%s\n", taos_errstr(result));
taos_free_result(result);
exit(1);
}
TAOS_ROW row;
int rows = 0;
int num_fields = taos_field_count(result);
TAOS_FIELD *fields = taos_fetch_fields(result);
printf("num_fields = %d\n", num_fields);
printf("select * from table, result:\n");
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[1024] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
printf("====demo end====\n\n");
}
异步查询示例
异步查询
/*
* 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/>.
*/
// TAOS asynchronous API example
// this example opens multiple tables, insert/retrieve multiple tables
// it is used by TAOS internally for one performance testing
// to compiple: gcc -o asyncdemo asyncdemo.c -ltaos
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <unistd.h>
#include <taos.h>
int points = 5;
int numOfTables = 3;
int tablesInsertProcessed = 0;
int tablesSelectProcessed = 0;
int64_t st, et;
typedef struct {
int id;
TAOS * taos;
char name[16];
time_t timeStamp;
int value;
int rowsInserted;
int rowsTried;
int rowsRetrieved;
} STable;
void taos_insert_call_back(void *param, TAOS_RES *tres, int code);
void taos_select_call_back(void *param, TAOS_RES *tres, int code);
void taos_error(TAOS *taos);
static void queryDB(TAOS *taos, char *command) {
int i;
TAOS_RES *pSql = NULL;
int32_t code = -1;
for (i = 0; i < 5; i++) {
if (NULL != pSql) {
taos_free_result(pSql);
pSql = NULL;
}
pSql = taos_query(taos, command);
code = taos_errno(pSql);
if (0 == code) {
break;
}
}
if (code != 0) {
fprintf(stderr, "Failed to run %s, reason: %s\n", command, taos_errstr(pSql));
taos_free_result(pSql);
taos_close(taos);
taos_cleanup();
exit(EXIT_FAILURE);
}
taos_free_result(pSql);
}
int main(int argc, char *argv[]) {
TAOS * taos;
struct timeval systemTime;
int i;
char sql[1024] = {0};
char prefix[20] = {0};
char db[128] = {0};
STable * tableList;
if (argc != 5) {
printf("usage: %s server-ip dbname rowsPerTable numOfTables\n", argv[0]);
exit(0);
}
// a simple way to parse input parameters
if (argc >= 3) strcpy(db, argv[2]);
if (argc >= 4) points = atoi(argv[3]);
if (argc >= 5) numOfTables = atoi(argv[4]);
size_t size = sizeof(STable) * (size_t)numOfTables;
tableList = (STable *)malloc(size);
memset(tableList, 0, size);
taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
if (taos == NULL) taos_error(taos);
printf("success to connect to server\n");
sprintf(sql, "drop database if exists %s", db);
queryDB(taos, sql);
sprintf(sql, "create database %s", db);
queryDB(taos, sql);
sprintf(sql, "use %s", db);
queryDB(taos, sql);
strcpy(prefix, "asytbl_");
for (i = 0; i < numOfTables; ++i) {
tableList[i].id = i;
tableList[i].taos = taos;
sprintf(tableList[i].name, "%s%d", prefix, i);
sprintf(sql, "create table %s%d (ts timestamp, volume bigint)", prefix, i);
queryDB(taos, sql);
}
gettimeofday(&systemTime, NULL);
for (i = 0; i < numOfTables; ++i)
tableList[i].timeStamp = (time_t)(systemTime.tv_sec) * 1000 + systemTime.tv_usec / 1000;
printf("success to create tables, press any key to insert\n");
getchar();
printf("start to insert...\n");
gettimeofday(&systemTime, NULL);
st = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
tablesInsertProcessed = 0;
tablesSelectProcessed = 0;
for (i = 0; i < numOfTables; ++i) {
// insert records in asynchronous API
sprintf(sql, "insert into %s values(%ld, 0)", tableList[i].name, 1546300800000 + i);
taos_query_a(taos, sql, taos_insert_call_back, (void *)(tableList + i));
}
printf("once insert finished, presse any key to query\n");
getchar();
while (1) {
if (tablesInsertProcessed < numOfTables) {
printf("wait for process finished\n");
sleep(1);
continue;
}
break;
}
printf("start to query...\n");
gettimeofday(&systemTime, NULL);
st = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
for (i = 0; i < numOfTables; ++i) {
// select records in asynchronous API
sprintf(sql, "select * from %s", tableList[i].name);
taos_query_a(taos, sql, taos_select_call_back, (void *)(tableList + i));
}
printf("\nonce finished, press any key to exit\n");
getchar();
while (1) {
if (tablesSelectProcessed < numOfTables) {
printf("wait for process finished\n");
sleep(1);
continue;
}
break;
}
for (i = 0; i < numOfTables; ++i) {
printf("%s inserted:%d retrieved:%d\n", tableList[i].name, tableList[i].rowsInserted, tableList[i].rowsRetrieved);
}
taos_close(taos);
free(tableList);
printf("==== async demo end====\n");
printf("\n");
return 0;
}
void taos_error(TAOS *con) {
fprintf(stderr, "TDengine error: %s\n", taos_errstr(con));
taos_close(con);
taos_cleanup();
exit(1);
}
void taos_insert_call_back(void *param, TAOS_RES *tres, int code) {
STable * pTable = (STable *)param;
struct timeval systemTime;
char sql[128];
pTable->rowsTried++;
if (code < 0) {
printf("%s insert failed, code:%d, rows:%d\n", pTable->name, code, pTable->rowsTried);
} else if (code == 0) {
printf("%s not inserted\n", pTable->name);
} else {
pTable->rowsInserted++;
}
if (pTable->rowsTried < points) {
// for this demo, insert another record
sprintf(sql, "insert into %s values(%ld, %d)", pTable->name, 1546300800000 + pTable->rowsTried * 1000,
pTable->rowsTried);
taos_query_a(pTable->taos, sql, taos_insert_call_back, (void *)pTable);
} else {
printf("%d rows data are inserted into %s\n", points, pTable->name);
tablesInsertProcessed++;
if (tablesInsertProcessed >= numOfTables) {
gettimeofday(&systemTime, NULL);
et = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
printf("%lld mseconds to insert %d data points\n", (et - st) / 1000, points * numOfTables);
}
}
taos_free_result(tres);
}
void taos_retrieve_call_back(void *param, TAOS_RES *tres, int numOfRows) {
STable * pTable = (STable *)param;
struct timeval systemTime;
if (numOfRows > 0) {
for (int i = 0; i < numOfRows; ++i) {
// synchronous API to retrieve a row from batch of records
/*TAOS_ROW row = */ (void)taos_fetch_row(tres);
// process row
}
pTable->rowsRetrieved += numOfRows;
// retrieve next batch of rows
taos_fetch_rows_a(tres, taos_retrieve_call_back, pTable);
} else {
if (numOfRows < 0) printf("%s retrieve failed, code:%d\n", pTable->name, numOfRows);
// taos_free_result(tres);
printf("%d rows data retrieved from %s\n", pTable->rowsRetrieved, pTable->name);
tablesSelectProcessed++;
if (tablesSelectProcessed >= numOfTables) {
gettimeofday(&systemTime, NULL);
et = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
printf("%lld mseconds to query %d data rows\n", (et - st) / 1000, points * numOfTables);
}
taos_free_result(tres);
}
}
void taos_select_call_back(void *param, TAOS_RES *tres, int code) {
STable *pTable = (STable *)param;
if (code == 0 && tres) {
// asynchronous API to fetch a batch of records
taos_fetch_rows_a(tres, taos_retrieve_call_back, pTable);
} else {
printf("%s select failed, code:%d\n", pTable->name, code);
taos_free_result(tres);
taos_cleanup();
exit(1);
}
}
参数绑定示例
参数绑定
// TAOS standard API example. The same syntax as MySQL, but only a subet
// to compile: gcc -o prepare prepare.c -ltaos
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h>
#include <unistd.h>
void taosMsleep(int mseconds);
void verify_prepare(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create table m1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10), u1 tinyint unsigned, u2 smallint unsigned, u4 int unsigned, u8 bigint unsigned)";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
// insert 10 records
struct {
int64_t ts;
int8_t b;
int8_t v1;
int16_t v2;
int32_t v4;
int64_t v8;
float f4;
double f8;
char bin[40];
char blob[80];
uint8_t u1;
uint16_t u2;
uint32_t u4;
uint64_t u8;
} v = {0};
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_BIND params[14];
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts);
params[0].buffer = &v.ts;
params[0].length = ¶ms[0].buffer_length;
params[0].is_null = NULL;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b);
params[1].buffer = &v.b;
params[1].length = ¶ms[1].buffer_length;
params[1].is_null = NULL;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1);
params[2].buffer = &v.v1;
params[2].length = ¶ms[2].buffer_length;
params[2].is_null = NULL;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2);
params[3].buffer = &v.v2;
params[3].length = ¶ms[3].buffer_length;
params[3].is_null = NULL;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4);
params[4].buffer = &v.v4;
params[4].length = ¶ms[4].buffer_length;
params[4].is_null = NULL;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8);
params[5].buffer = &v.v8;
params[5].length = ¶ms[5].buffer_length;
params[5].is_null = NULL;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4);
params[6].buffer = &v.f4;
params[6].length = ¶ms[6].buffer_length;
params[6].is_null = NULL;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8);
params[7].buffer = &v.f8;
params[7].length = ¶ms[7].buffer_length;
params[7].is_null = NULL;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin);
params[8].buffer = v.bin;
params[8].length = ¶ms[8].buffer_length;
params[8].is_null = NULL;
strcpy(v.blob, "一二三四五六七八九十");
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = strlen(v.blob);
params[9].buffer = v.blob;
params[9].length = ¶ms[9].buffer_length;
params[9].is_null = NULL;
params[10].buffer_type = TSDB_DATA_TYPE_UTINYINT;
params[10].buffer_length = sizeof(v.u1);
params[10].buffer = &v.u1;
params[10].length = ¶ms[10].buffer_length;
params[10].is_null = NULL;
params[11].buffer_type = TSDB_DATA_TYPE_USMALLINT;
params[11].buffer_length = sizeof(v.u2);
params[11].buffer = &v.u2;
params[11].length = ¶ms[11].buffer_length;
params[11].is_null = NULL;
params[12].buffer_type = TSDB_DATA_TYPE_UINT;
params[12].buffer_length = sizeof(v.u4);
params[12].buffer = &v.u4;
params[12].length = ¶ms[12].buffer_length;
params[12].is_null = NULL;
params[13].buffer_type = TSDB_DATA_TYPE_UBIGINT;
params[13].buffer_length = sizeof(v.u8);
params[13].buffer = &v.u8;
params[13].length = ¶ms[13].buffer_length;
params[13].is_null = NULL;
int is_null = 1;
sql = "insert into m1 values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
v.ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts += 1;
for (int j = 1; j < 10; ++j) {
params[j].is_null = ((i == j) ? &is_null : 0);
}
v.b = (int8_t)i % 2;
v.v1 = (int8_t)i;
v.v2 = (int16_t)(i * 2);
v.v4 = (int32_t)(i * 4);
v.v8 = (int64_t)(i * 8);
v.f4 = (float)(i * 40);
v.f8 = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin); ++j) {
v.bin[j] = (char)(i + '0');
}
v.u1 = (uint8_t)i;
v.u2 = (uint16_t)(i * 2);
v.u4 = (uint32_t)(i * 4);
v.u8 = (uint64_t)(i * 8);
taos_stmt_bind_param(stmt, params);
taos_stmt_add_batch(stmt);
}
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
int affectedRows = taos_stmt_affected_rows(stmt);
printf("sucessfully inserted %d rows\n", affectedRows);
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
v.v1 = 5;
v.v2 = 15;
taos_stmt_bind_param(stmt, params + 2);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
}
void verify_prepare2(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create table m1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10), u1 tinyint unsigned, u2 smallint unsigned, u4 int unsigned, u8 bigint unsigned)";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
// insert 10 records
struct {
int64_t ts;
int8_t b;
int8_t v1;
int16_t v2;
int32_t v4;
int64_t v8;
float f4;
double f8;
char bin[40];
char blob[80];
uint8_t u1;
uint16_t u2;
uint32_t u4;
uint64_t u8;
} v = {0};
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_BIND params[14];
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts);
params[0].buffer = &v.ts;
params[0].length = ¶ms[0].buffer_length;
params[0].is_null = NULL;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b);
params[1].buffer = &v.b;
params[1].length = ¶ms[1].buffer_length;
params[1].is_null = NULL;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1);
params[2].buffer = &v.v1;
params[2].length = ¶ms[2].buffer_length;
params[2].is_null = NULL;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2);
params[3].buffer = &v.v2;
params[3].length = ¶ms[3].buffer_length;
params[3].is_null = NULL;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4);
params[4].buffer = &v.v4;
params[4].length = ¶ms[4].buffer_length;
params[4].is_null = NULL;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8);
params[5].buffer = &v.v8;
params[5].length = ¶ms[5].buffer_length;
params[5].is_null = NULL;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4);
params[6].buffer = &v.f4;
params[6].length = ¶ms[6].buffer_length;
params[6].is_null = NULL;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8);
params[7].buffer = &v.f8;
params[7].length = ¶ms[7].buffer_length;
params[7].is_null = NULL;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin);
params[8].buffer = v.bin;
params[8].length = ¶ms[8].buffer_length;
params[8].is_null = NULL;
strcpy(v.blob, "一二三四五六七八九十");
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = strlen(v.blob);
params[9].buffer = v.blob;
params[9].length = ¶ms[9].buffer_length;
params[9].is_null = NULL;
params[10].buffer_type = TSDB_DATA_TYPE_UTINYINT;
params[10].buffer_length = sizeof(v.u1);
params[10].buffer = &v.u1;
params[10].length = ¶ms[10].buffer_length;
params[10].is_null = NULL;
params[11].buffer_type = TSDB_DATA_TYPE_USMALLINT;
params[11].buffer_length = sizeof(v.u2);
params[11].buffer = &v.u2;
params[11].length = ¶ms[11].buffer_length;
params[11].is_null = NULL;
params[12].buffer_type = TSDB_DATA_TYPE_UINT;
params[12].buffer_length = sizeof(v.u4);
params[12].buffer = &v.u4;
params[12].length = ¶ms[12].buffer_length;
params[12].is_null = NULL;
params[13].buffer_type = TSDB_DATA_TYPE_UBIGINT;
params[13].buffer_length = sizeof(v.u8);
params[13].buffer = &v.u8;
params[13].length = ¶ms[13].buffer_length;
params[13].is_null = NULL;
sql = "insert into ? values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
code = taos_stmt_set_tbname(stmt, "m1");
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
int is_null = 1;
v.ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts += 1;
for (int j = 1; j < 10; ++j) {
params[j].is_null = ((i == j) ? &is_null : 0);
}
v.b = (int8_t)i % 2;
v.v1 = (int8_t)i;
v.v2 = (int16_t)(i * 2);
v.v4 = (int32_t)(i * 4);
v.v8 = (int64_t)(i * 8);
v.f4 = (float)(i * 40);
v.f8 = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin); ++j) {
v.bin[j] = (char)(i + '0');
}
v.u1 = (uint8_t)i;
v.u2 = (uint16_t)(i * 2);
v.u4 = (uint32_t)(i * 4);
v.u8 = (uint64_t)(i * 8);
taos_stmt_bind_param(stmt, params);
taos_stmt_add_batch(stmt);
}
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
int affectedRows = taos_stmt_affected_rows(stmt);
printf("sucessfully inserted %d rows\n", affectedRows);
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
TAOS_BIND qparams[2];
int8_t v1 = 5;
int16_t v2 = 15;
qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT;
qparams[0].buffer_length = sizeof(v1);
qparams[0].buffer = &v1;
qparams[0].length = &qparams[0].buffer_length;
qparams[0].is_null = NULL;
qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT;
qparams[1].buffer_length = sizeof(v2);
qparams[1].buffer = &v2;
qparams[1].length = &qparams[1].buffer_length;
qparams[1].is_null = NULL;
taos_stmt_bind_param(stmt, qparams);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
}
void verify_prepare3(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create stable st1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10), u1 tinyint unsigned, u2 smallint unsigned, u4 int unsigned, u8 bigint unsigned) "
"tags "
"(b_tag bool, v1_tag tinyint, v2_tag smallint, v4_tag int, v8_tag bigint, f4_tag float, f8_tag double, bin_tag "
"binary(40), blob_tag nchar(10), u1_tag tinyint unsigned, u2_tag smallint unsigned, u4_tag int unsigned, u8_tag "
"bigint "
"unsigned)";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
TAOS_BIND tags[13];
struct {
int8_t b;
int8_t v1;
int16_t v2;
int32_t v4;
int64_t v8;
float f4;
double f8;
char bin[40];
char blob[80];
uint8_t u1;
uint16_t u2;
uint32_t u4;
uint64_t u8;
} id = {0};
id.b = (int8_t)1;
id.v1 = (int8_t)1;
id.v2 = (int16_t)2;
id.v4 = (int32_t)4;
id.v8 = (int64_t)8;
id.f4 = (float)40;
id.f8 = (double)80;
for (int j = 0; j < sizeof(id.bin); ++j) {
id.bin[j] = (char)('1' + '0');
}
strcpy(id.blob, "一二三四五六七八九十");
id.u1 = (uint8_t)1;
id.u2 = (uint16_t)2;
id.u4 = (uint32_t)4;
id.u8 = (uint64_t)8;
tags[0].buffer_type = TSDB_DATA_TYPE_BOOL;
tags[0].buffer_length = sizeof(id.b);
tags[0].buffer = &id.b;
tags[0].length = &tags[0].buffer_length;
tags[0].is_null = NULL;
tags[1].buffer_type = TSDB_DATA_TYPE_TINYINT;
tags[1].buffer_length = sizeof(id.v1);
tags[1].buffer = &id.v1;
tags[1].length = &tags[1].buffer_length;
tags[1].is_null = NULL;
tags[2].buffer_type = TSDB_DATA_TYPE_SMALLINT;
tags[2].buffer_length = sizeof(id.v2);
tags[2].buffer = &id.v2;
tags[2].length = &tags[2].buffer_length;
tags[2].is_null = NULL;
tags[3].buffer_type = TSDB_DATA_TYPE_INT;
tags[3].buffer_length = sizeof(id.v4);
tags[3].buffer = &id.v4;
tags[3].length = &tags[3].buffer_length;
tags[3].is_null = NULL;
tags[4].buffer_type = TSDB_DATA_TYPE_BIGINT;
tags[4].buffer_length = sizeof(id.v8);
tags[4].buffer = &id.v8;
tags[4].length = &tags[4].buffer_length;
tags[4].is_null = NULL;
tags[5].buffer_type = TSDB_DATA_TYPE_FLOAT;
tags[5].buffer_length = sizeof(id.f4);
tags[5].buffer = &id.f4;
tags[5].length = &tags[5].buffer_length;
tags[5].is_null = NULL;
tags[6].buffer_type = TSDB_DATA_TYPE_DOUBLE;
tags[6].buffer_length = sizeof(id.f8);
tags[6].buffer = &id.f8;
tags[6].length = &tags[6].buffer_length;
tags[6].is_null = NULL;
tags[7].buffer_type = TSDB_DATA_TYPE_BINARY;
tags[7].buffer_length = sizeof(id.bin);
tags[7].buffer = &id.bin;
tags[7].length = &tags[7].buffer_length;
tags[7].is_null = NULL;
tags[8].buffer_type = TSDB_DATA_TYPE_NCHAR;
tags[8].buffer_length = strlen(id.blob);
tags[8].buffer = &id.blob;
tags[8].length = &tags[8].buffer_length;
tags[8].is_null = NULL;
tags[9].buffer_type = TSDB_DATA_TYPE_UTINYINT;
tags[9].buffer_length = sizeof(id.u1);
tags[9].buffer = &id.u1;
tags[9].length = &tags[9].buffer_length;
tags[9].is_null = NULL;
tags[10].buffer_type = TSDB_DATA_TYPE_USMALLINT;
tags[10].buffer_length = sizeof(id.u2);
tags[10].buffer = &id.u2;
tags[10].length = &tags[10].buffer_length;
tags[10].is_null = NULL;
tags[11].buffer_type = TSDB_DATA_TYPE_UINT;
tags[11].buffer_length = sizeof(id.u4);
tags[11].buffer = &id.u4;
tags[11].length = &tags[11].buffer_length;
tags[11].is_null = NULL;
tags[12].buffer_type = TSDB_DATA_TYPE_UBIGINT;
tags[12].buffer_length = sizeof(id.u8);
tags[12].buffer = &id.u8;
tags[12].length = &tags[12].buffer_length;
tags[12].is_null = NULL;
// insert 10 records
struct {
int64_t ts[10];
int8_t b[10];
int8_t v1[10];
int16_t v2[10];
int32_t v4[10];
int64_t v8[10];
float f4[10];
double f8[10];
char bin[10][40];
char blob[10][80];
uint8_t u1[10];
uint16_t u2[10];
uint32_t u4[10];
uint64_t u8[10];
} v;
int32_t* t8_len = malloc(sizeof(int32_t) * 10);
int32_t* t16_len = malloc(sizeof(int32_t) * 10);
int32_t* t32_len = malloc(sizeof(int32_t) * 10);
int32_t* t64_len = malloc(sizeof(int32_t) * 10);
int32_t* float_len = malloc(sizeof(int32_t) * 10);
int32_t* double_len = malloc(sizeof(int32_t) * 10);
int32_t* bin_len = malloc(sizeof(int32_t) * 10);
int32_t* blob_len = malloc(sizeof(int32_t) * 10);
int32_t* u8_len = malloc(sizeof(int32_t) * 10);
int32_t* u16_len = malloc(sizeof(int32_t) * 10);
int32_t* u32_len = malloc(sizeof(int32_t) * 10);
int32_t* u64_len = malloc(sizeof(int32_t) * 10);
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_MULTI_BIND params[14];
char is_null[10] = {0};
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts[0]);
params[0].buffer = v.ts;
params[0].length = t64_len;
params[0].is_null = is_null;
params[0].num = 10;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b[0]);
params[1].buffer = v.b;
params[1].length = t8_len;
params[1].is_null = is_null;
params[1].num = 10;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1[0]);
params[2].buffer = v.v1;
params[2].length = t8_len;
params[2].is_null = is_null;
params[2].num = 10;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2[0]);
params[3].buffer = v.v2;
params[3].length = t16_len;
params[3].is_null = is_null;
params[3].num = 10;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4[0]);
params[4].buffer = v.v4;
params[4].length = t32_len;
params[4].is_null = is_null;
params[4].num = 10;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8[0]);
params[5].buffer = v.v8;
params[5].length = t64_len;
params[5].is_null = is_null;
params[5].num = 10;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4[0]);
params[6].buffer = v.f4;
params[6].length = float_len;
params[6].is_null = is_null;
params[6].num = 10;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8[0]);
params[7].buffer = v.f8;
params[7].length = double_len;
params[7].is_null = is_null;
params[7].num = 10;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin[0]);
params[8].buffer = v.bin;
params[8].length = bin_len;
params[8].is_null = is_null;
params[8].num = 10;
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = sizeof(v.blob[0]);
params[9].buffer = v.blob;
params[9].length = blob_len;
params[9].is_null = is_null;
params[9].num = 10;
params[10].buffer_type = TSDB_DATA_TYPE_UTINYINT;
params[10].buffer_length = sizeof(v.u1[0]);
params[10].buffer = v.u1;
params[10].length = u8_len;
params[10].is_null = is_null;
params[10].num = 10;
params[11].buffer_type = TSDB_DATA_TYPE_USMALLINT;
params[11].buffer_length = sizeof(v.u2[0]);
params[11].buffer = v.u2;
params[11].length = u16_len;
params[11].is_null = is_null;
params[11].num = 10;
params[12].buffer_type = TSDB_DATA_TYPE_UINT;
params[12].buffer_length = sizeof(v.u4[0]);
params[12].buffer = v.u4;
params[12].length = u32_len;
params[12].is_null = is_null;
params[12].num = 10;
params[13].buffer_type = TSDB_DATA_TYPE_UBIGINT;
params[13].buffer_length = sizeof(v.u8[0]);
params[13].buffer = v.u8;
params[13].length = u64_len;
params[13].is_null = is_null;
params[13].num = 10;
sql = "insert into ? using st1 tags(?,?,?,?,?,?,?,?,?,?,?,?,?) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
code = taos_stmt_set_tbname_tags(stmt, "m1", tags);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_set_tbname_tags. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
int64_t ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts[i] = ts++;
is_null[i] = 0;
v.b[i] = (int8_t)i % 2;
v.v1[i] = (int8_t)i;
v.v2[i] = (int16_t)(i * 2);
v.v4[i] = (int32_t)(i * 4);
v.v8[i] = (int64_t)(i * 8);
v.f4[i] = (float)(i * 40);
v.f8[i] = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin[0]); ++j) {
v.bin[i][j] = (char)(i + '0');
}
strcpy(v.blob[i], "一二三四五六七八九十");
v.u1[i] = (uint8_t)i;
v.u2[i] = (uint16_t)(i * 2);
v.u4[i] = (uint32_t)(i * 4);
v.u8[i] = (uint64_t)(i * 8);
t8_len[i] = sizeof(int8_t);
t16_len[i] = sizeof(int16_t);
t32_len[i] = sizeof(int32_t);
t64_len[i] = sizeof(int64_t);
float_len[i] = sizeof(float);
double_len[i] = sizeof(double);
bin_len[i] = sizeof(v.bin[0]);
blob_len[i] = (int32_t)strlen(v.blob[i]);
u8_len[i] = sizeof(uint8_t);
u16_len[i] = sizeof(uint16_t);
u32_len[i] = sizeof(uint32_t);
u64_len[i] = sizeof(uint64_t);
}
taos_stmt_bind_param_batch(stmt, params);
taos_stmt_add_batch(stmt);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
int affectedRows = taos_stmt_affected_rows(stmt);
printf("successfully inserted %d rows\n", affectedRows);
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
TAOS_BIND qparams[2];
int8_t v1 = 5;
int16_t v2 = 15;
qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT;
qparams[0].buffer_length = sizeof(v1);
qparams[0].buffer = &v1;
qparams[0].length = &qparams[0].buffer_length;
qparams[0].is_null = NULL;
qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT;
qparams[1].buffer_length = sizeof(v2);
qparams[1].buffer = &v2;
qparams[1].length = &qparams[1].buffer_length;
qparams[1].is_null = NULL;
taos_stmt_bind_param(stmt, qparams);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
free(t8_len);
free(t16_len);
free(t32_len);
free(t64_len);
free(float_len);
free(double_len);
free(bin_len);
free(blob_len);
free(u8_len);
free(u16_len);
free(u32_len);
free(u64_len);
}
/**
* @brief Verify the upper/lower case of tableName for create(by setTableName)/query/show/describe/drop.
* https://jira.taosdata.com:18080/browse/TS-904
* https://jira.taosdata.com:18090/pages/viewpage.action?pageId=129140555
* @param taos
*/
void verify_prepare4(TAOS* taos) {
printf("Verify the upper/lower case of tableName for create(by setTableName)/query/show/describe/drop etc.\n");
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create stable st1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10), u1 tinyint unsigned, u2 smallint unsigned, u4 int unsigned, u8 bigint unsigned) "
"tags "
"(b_tag bool, v1_tag tinyint, v2_tag smallint, v4_tag int, v8_tag bigint, f4_tag float, f8_tag double, bin_tag "
"binary(40), blob_tag nchar(10), u1_tag tinyint unsigned, u2_tag smallint unsigned, u4_tag int unsigned, u8_tag "
"bigint "
"unsigned)";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
exit(EXIT_FAILURE);
}
taos_free_result(result);
TAOS_BIND tags[13];
struct {
int8_t b;
int8_t v1;
int16_t v2;
int32_t v4;
int64_t v8;
float f4;
double f8;
char bin[40];
char blob[80];
uint8_t u1;
uint16_t u2;
uint32_t u4;
uint64_t u8;
} id = {0};
id.b = (int8_t)1;
id.v1 = (int8_t)1;
id.v2 = (int16_t)2;
id.v4 = (int32_t)4;
id.v8 = (int64_t)8;
id.f4 = (float)40;
id.f8 = (double)80;
for (int j = 0; j < sizeof(id.bin); ++j) {
id.bin[j] = (char)('1' + '0');
}
strcpy(id.blob, "一二三四五六七八九十");
id.u1 = (uint8_t)1;
id.u2 = (uint16_t)2;
id.u4 = (uint32_t)4;
id.u8 = (uint64_t)8;
tags[0].buffer_type = TSDB_DATA_TYPE_BOOL;
tags[0].buffer_length = sizeof(id.b);
tags[0].buffer = &id.b;
tags[0].length = &tags[0].buffer_length;
tags[0].is_null = NULL;
tags[1].buffer_type = TSDB_DATA_TYPE_TINYINT;
tags[1].buffer_length = sizeof(id.v1);
tags[1].buffer = &id.v1;
tags[1].length = &tags[1].buffer_length;
tags[1].is_null = NULL;
tags[2].buffer_type = TSDB_DATA_TYPE_SMALLINT;
tags[2].buffer_length = sizeof(id.v2);
tags[2].buffer = &id.v2;
tags[2].length = &tags[2].buffer_length;
tags[2].is_null = NULL;
tags[3].buffer_type = TSDB_DATA_TYPE_INT;
tags[3].buffer_length = sizeof(id.v4);
tags[3].buffer = &id.v4;
tags[3].length = &tags[3].buffer_length;
tags[3].is_null = NULL;
tags[4].buffer_type = TSDB_DATA_TYPE_BIGINT;
tags[4].buffer_length = sizeof(id.v8);
tags[4].buffer = &id.v8;
tags[4].length = &tags[4].buffer_length;
tags[4].is_null = NULL;
tags[5].buffer_type = TSDB_DATA_TYPE_FLOAT;
tags[5].buffer_length = sizeof(id.f4);
tags[5].buffer = &id.f4;
tags[5].length = &tags[5].buffer_length;
tags[5].is_null = NULL;
tags[6].buffer_type = TSDB_DATA_TYPE_DOUBLE;
tags[6].buffer_length = sizeof(id.f8);
tags[6].buffer = &id.f8;
tags[6].length = &tags[6].buffer_length;
tags[6].is_null = NULL;
tags[7].buffer_type = TSDB_DATA_TYPE_BINARY;
tags[7].buffer_length = sizeof(id.bin);
tags[7].buffer = &id.bin;
tags[7].length = &tags[7].buffer_length;
tags[7].is_null = NULL;
tags[8].buffer_type = TSDB_DATA_TYPE_NCHAR;
tags[8].buffer_length = strlen(id.blob);
tags[8].buffer = &id.blob;
tags[8].length = &tags[8].buffer_length;
tags[8].is_null = NULL;
tags[9].buffer_type = TSDB_DATA_TYPE_UTINYINT;
tags[9].buffer_length = sizeof(id.u1);
tags[9].buffer = &id.u1;
tags[9].length = &tags[9].buffer_length;
tags[9].is_null = NULL;
tags[10].buffer_type = TSDB_DATA_TYPE_USMALLINT;
tags[10].buffer_length = sizeof(id.u2);
tags[10].buffer = &id.u2;
tags[10].length = &tags[10].buffer_length;
tags[10].is_null = NULL;
tags[11].buffer_type = TSDB_DATA_TYPE_UINT;
tags[11].buffer_length = sizeof(id.u4);
tags[11].buffer = &id.u4;
tags[11].length = &tags[11].buffer_length;
tags[11].is_null = NULL;
tags[12].buffer_type = TSDB_DATA_TYPE_UBIGINT;
tags[12].buffer_length = sizeof(id.u8);
tags[12].buffer = &id.u8;
tags[12].length = &tags[12].buffer_length;
tags[12].is_null = NULL;
// insert 10 records
struct {
int64_t ts[10];
int8_t b[10];
int8_t v1[10];
int16_t v2[10];
int32_t v4[10];
int64_t v8[10];
float f4[10];
double f8[10];
char bin[10][40];
char blob[10][80];
uint8_t u1[10];
uint16_t u2[10];
uint32_t u4[10];
uint64_t u8[10];
} v;
int32_t* t8_len = malloc(sizeof(int32_t) * 10);
int32_t* t16_len = malloc(sizeof(int32_t) * 10);
int32_t* t32_len = malloc(sizeof(int32_t) * 10);
int32_t* t64_len = malloc(sizeof(int32_t) * 10);
int32_t* float_len = malloc(sizeof(int32_t) * 10);
int32_t* double_len = malloc(sizeof(int32_t) * 10);
int32_t* bin_len = malloc(sizeof(int32_t) * 10);
int32_t* blob_len = malloc(sizeof(int32_t) * 10);
int32_t* u8_len = malloc(sizeof(int32_t) * 10);
int32_t* u16_len = malloc(sizeof(int32_t) * 10);
int32_t* u32_len = malloc(sizeof(int32_t) * 10);
int32_t* u64_len = malloc(sizeof(int32_t) * 10);
TAOS_MULTI_BIND params[14];
char is_null[10] = {0};
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts[0]);
params[0].buffer = v.ts;
params[0].length = t64_len;
params[0].is_null = is_null;
params[0].num = 10;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b[0]);
params[1].buffer = v.b;
params[1].length = t8_len;
params[1].is_null = is_null;
params[1].num = 10;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1[0]);
params[2].buffer = v.v1;
params[2].length = t8_len;
params[2].is_null = is_null;
params[2].num = 10;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2[0]);
params[3].buffer = v.v2;
params[3].length = t16_len;
params[3].is_null = is_null;
params[3].num = 10;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4[0]);
params[4].buffer = v.v4;
params[4].length = t32_len;
params[4].is_null = is_null;
params[4].num = 10;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8[0]);
params[5].buffer = v.v8;
params[5].length = t64_len;
params[5].is_null = is_null;
params[5].num = 10;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4[0]);
params[6].buffer = v.f4;
params[6].length = float_len;
params[6].is_null = is_null;
params[6].num = 10;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8[0]);
params[7].buffer = v.f8;
params[7].length = double_len;
params[7].is_null = is_null;
params[7].num = 10;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin[0]);
params[8].buffer = v.bin;
params[8].length = bin_len;
params[8].is_null = is_null;
params[8].num = 10;
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = sizeof(v.blob[0]);
params[9].buffer = v.blob;
params[9].length = blob_len;
params[9].is_null = is_null;
params[9].num = 10;
params[10].buffer_type = TSDB_DATA_TYPE_UTINYINT;
params[10].buffer_length = sizeof(v.u1[0]);
params[10].buffer = v.u1;
params[10].length = u8_len;
params[10].is_null = is_null;
params[10].num = 10;
params[11].buffer_type = TSDB_DATA_TYPE_USMALLINT;
params[11].buffer_length = sizeof(v.u2[0]);
params[11].buffer = v.u2;
params[11].length = u16_len;
params[11].is_null = is_null;
params[11].num = 10;
params[12].buffer_type = TSDB_DATA_TYPE_UINT;
params[12].buffer_length = sizeof(v.u4[0]);
params[12].buffer = v.u4;
params[12].length = u32_len;
params[12].is_null = is_null;
params[12].num = 10;
params[13].buffer_type = TSDB_DATA_TYPE_UBIGINT;
params[13].buffer_length = sizeof(v.u8[0]);
params[13].buffer = v.u8;
params[13].length = u64_len;
params[13].is_null = is_null;
params[13].num = 10;
// verify table names for upper/lower case
#define VERIFY_CNT 5
typedef struct {
char setTbName[20];
char showName[20];
char describeName[20];
char queryName[20];
char dropName[20];
} STbNames;
/**
* @brief
* 0 - success expected
* NonZero - fail expected
*/
typedef struct {
int32_t setTbName;
int32_t showName;
int32_t describeName;
int32_t queryName;
int32_t dropName;
} STbNamesResult;
STbNames tbName[VERIFY_CNT] = {0};
STbNamesResult tbNameResult[VERIFY_CNT] = {0};
STbNames* pTbName = NULL;
STbNamesResult* pTbNameResult = NULL;
pTbName = &tbName[0];
pTbNameResult = &tbNameResult[0];
strcpy(pTbName->setTbName, "Mn1");
strcpy(pTbName->showName, "mn1");
strcpy(pTbName->describeName, "mn1");
strcpy(pTbName->queryName, "mn1");
strcpy(pTbName->dropName, "mn1");
pTbName = &tbName[1];
pTbNameResult = &tbNameResult[1];
strcpy(pTbName->setTbName, "'Mn1'");
strcpy(pTbName->showName, "'mn1'");
strcpy(pTbName->describeName, "'mn1'");
strcpy(pTbName->queryName, "'mn1'");
strcpy(pTbName->dropName, "'mn1'");
pTbName = &tbName[2];
pTbNameResult = &tbNameResult[2];
strcpy(pTbName->setTbName, "\"Mn1\"");
strcpy(pTbName->showName, "\"mn1\"");
strcpy(pTbName->describeName, "\"mn1\"");
strcpy(pTbName->queryName, "\"mn1\"");
strcpy(pTbName->dropName, "\"mn1\"");
pTbName = &tbName[3];
pTbNameResult = &tbNameResult[3];
strcpy(pTbName->setTbName, "\"Mn1\"");
strcpy(pTbName->showName, "'mn1'");
strcpy(pTbName->describeName, "'mn1'");
strcpy(pTbName->queryName, "mn1");
strcpy(pTbName->dropName, "\"mn1\"");
pTbName = &tbName[4];
pTbNameResult = &tbNameResult[4];
strcpy(pTbName->setTbName, "`Mn1`");
strcpy(pTbName->showName, "Mn1"); // TODO support uniform of ``
strcpy(pTbName->describeName, "`Mn1`");
strcpy(pTbName->queryName, "`Mn1`");
strcpy(pTbName->dropName, "`Mn1`");
TAOS_STMT* stmt = NULL;
for (int n = 0; n < VERIFY_CNT; ++n) {
printf("\033[31m[%d] ===================================\033[0m\n", n);
pTbName = &tbName[n];
pTbNameResult = &tbNameResult[n];
char tmpStr[256] = {0};
// set table name
stmt = taos_stmt_init(taos);
if (!stmt) {
printf("\033[31m[%d] failed to execute taos_stmt_init. error:%s\033[0m\n", n);
exit(EXIT_FAILURE);
}
sql = "insert into ? using st1 tags(?,?,?,?,?,?,?,?,?,?,?,?,?) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
printf("[%d] taos_stmt_set_tbname_tags, tbname=%s\n", n, pTbName->setTbName);
code = taos_stmt_set_tbname_tags(stmt, pTbName->setTbName, tags);
if ((!pTbNameResult->setTbName && (0 != code)) || (pTbNameResult->setTbName && (0 == code))) {
printf("\033[31m[%d] failed to execute taos_stmt_set_tbname_tags. error:%s\033[0m\n", n, taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
if (code == 0) {
int64_t ts = 1591060628000 + 1000 * n;
for (int i = 0; i < 10; ++i) {
v.ts[i] = ts++;
is_null[i] = 0;
v.b[i] = (int8_t)i % 2;
v.v1[i] = (int8_t)i;
v.v2[i] = (int16_t)(i * 2);
v.v4[i] = (int32_t)(i * 4);
v.v8[i] = (int64_t)(i * 8);
v.f4[i] = (float)(i * 40);
v.f8[i] = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin[0]); ++j) {
v.bin[i][j] = (char)(i + '0');
}
strcpy(v.blob[i], "一二三四五六七八九十");
v.u1[i] = (uint8_t)i;
v.u2[i] = (uint16_t)(i * 2);
v.u4[i] = (uint32_t)(i * 4);
v.u8[i] = (uint64_t)(i * 8);
t8_len[i] = sizeof(int8_t);
t16_len[i] = sizeof(int16_t);
t32_len[i] = sizeof(int32_t);
t64_len[i] = sizeof(int64_t);
float_len[i] = sizeof(float);
double_len[i] = sizeof(double);
bin_len[i] = sizeof(v.bin[0]);
blob_len[i] = (int32_t)strlen(v.blob[i]);
u8_len[i] = sizeof(uint8_t);
u16_len[i] = sizeof(uint16_t);
u32_len[i] = sizeof(uint32_t);
u64_len[i] = sizeof(uint64_t);
}
taos_stmt_bind_param_batch(stmt, params);
taos_stmt_add_batch(stmt);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31m[%d] failed to execute insert statement.error:%s\033[0m\n", n, taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
}
taos_stmt_close(stmt);
// show the table
printf("[%d] show tables, tbName = %s\n", n, pTbName->showName);
stmt = taos_stmt_init(taos);
sprintf(tmpStr, "show tables like %s", pTbName->showName);
taos_stmt_prepare(stmt, tmpStr, 0);
code = taos_stmt_execute(stmt);
if ((!pTbNameResult->showName && (0 != code)) || (pTbNameResult->showName && (0 == code))) {
printf("\033[31m[%d] failed to execute show tables like. error:%s\033[0m\n", n, taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
taos_stmt_close(stmt);
// describe the table
printf("[%d] describe tables, tbName = %s\n", n, pTbName->describeName);
stmt = taos_stmt_init(taos);
sprintf(tmpStr, "describe %s", pTbName->describeName);
taos_stmt_prepare(stmt, tmpStr, 0);
code = taos_stmt_execute(stmt);
if ((!pTbNameResult->describeName && (0 != code)) || (pTbNameResult->describeName && (0 == code))) {
printf("\033[31m[%d] failed to execute describe tables. error:%s\033[0m\n", n, taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
taos_stmt_close(stmt);
// query the records
printf("[%d] select statement, tbName = %s\n", n, pTbName->queryName);
stmt = taos_stmt_init(taos);
sprintf(tmpStr, "SELECT * FROM %s", pTbName->queryName);
taos_stmt_prepare(stmt, tmpStr, 0);
TAOS_BIND qparams[2];
int8_t v1 = 5;
int16_t v2 = 15;
qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT;
qparams[0].buffer_length = sizeof(v1);
qparams[0].buffer = &v1;
qparams[0].length = &qparams[0].buffer_length;
qparams[0].is_null = NULL;
qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT;
qparams[1].buffer_length = sizeof(v2);
qparams[1].buffer = &v2;
qparams[1].length = &qparams[1].buffer_length;
qparams[1].is_null = NULL;
taos_stmt_bind_param(stmt, qparams);
code = taos_stmt_execute(stmt);
if ((!pTbNameResult->queryName && (0 != code)) || (pTbNameResult->queryName && (0 == code))) {
printf("\033[31m[%d] failed to execute select statement.error:%s\033[0m\n", n, taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("[%d] row = %s\n", n, temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
// drop table
printf("[%d] drop table, tbName = %s\n", n, pTbName->dropName);
stmt = taos_stmt_init(taos);
sprintf(tmpStr, "drop table %s", pTbName->dropName);
taos_stmt_prepare(stmt, tmpStr, 0);
code = taos_stmt_execute(stmt);
if ((!pTbNameResult->dropName && (0 != code)) || (pTbNameResult->dropName && (0 == code))) {
printf("\033[31m[%d] failed to drop table. error:%s\033[0m\n", n, taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
taos_stmt_close(stmt);
}
free(t8_len);
free(t16_len);
free(t32_len);
free(t64_len);
free(float_len);
free(double_len);
free(bin_len);
free(blob_len);
free(u8_len);
free(u16_len);
free(u32_len);
free(u64_len);
}
int main(int argc, char* argv[]) {
const char* host = "127.0.0.1";
const char* user = "root";
const char* passwd = "taosdata";
taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
TAOS* taos = taos_connect(host, user, passwd, "", 0);
if (taos == NULL) {
printf("\033[31mfailed to connect to db, reason:%s\033[0m\n", taos_errstr(taos));
exit(1);
}
char* info = taos_get_server_info(taos);
printf("server info: %s\n", info);
info = taos_get_client_info(taos);
printf("client info: %s\n", info);
printf("************ verify prepare *************\n");
verify_prepare(taos);
printf("************ verify prepare2 *************\n");
verify_prepare2(taos);
printf("************ verify prepare3 *************\n");
verify_prepare3(taos);
printf("************ verify prepare4 *************\n");
verify_prepare4(taos);
printf("************ verify end *************\n");
exit(EXIT_SUCCESS);
}
无模式写入示例
无模式写入
#include "os.h"
#include "taos.h"
#include "taoserror.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
bool verbose = false;
void printThreadId(pthread_t id, char* buf)
{
size_t i;
for (i = sizeof(i); i; --i)
sprintf(buf + strlen(buf), "%02x", *(((unsigned char*) &id) + i - 1));
}
static int64_t getTimeInUs() {
struct timeval systemTime;
gettimeofday(&systemTime, NULL);
return (int64_t)systemTime.tv_sec * 1000000L + (int64_t)systemTime.tv_usec;
}
typedef struct {
char** lines;
int numLines;
} SThreadLinesBatch;
typedef struct {
TAOS* taos;
int protocol;
int numBatches;
SThreadLinesBatch *batches;
int64_t costTime;
} SThreadInsertArgs;
static void* insertLines(void* args) {
SThreadInsertArgs* insertArgs = (SThreadInsertArgs*) args;
char tidBuf[32] = {0};
printThreadId(pthread_self(), tidBuf);
for (int i = 0; i < insertArgs->numBatches; ++i) {
SThreadLinesBatch* batch = insertArgs->batches + i;
if (verbose) printf("%s, thread: 0x%s\n", "begin taos_insert_lines", tidBuf);
int64_t begin = getTimeInUs();
//int32_t code = taos_insert_lines(insertArgs->taos, batch->lines, batch->numLines);
TAOS_RES * res = taos_schemaless_insert(insertArgs->taos, batch->lines, batch->numLines, insertArgs->protocol, TSDB_SML_TIMESTAMP_MILLI_SECONDS);
int32_t code = taos_errno(res);
int64_t end = getTimeInUs();
insertArgs->costTime += end - begin;
if (verbose) printf("code: %d, %s. time used:%"PRId64", thread: 0x%s\n", code, tstrerror(code), end - begin, tidBuf);
}
return NULL;
}
int32_t getTelenetTemplate(char* lineTemplate, int templateLen) {
char* sample = "sta%d %lld 44.3 t0=False t1=127i8 t2=32 t3=%di32 t4=9223372036854775807i64 t5=11.12345f32 t6=22.123456789f64 t7=\"hpxzrdiw\" t8=\"ncharTagValue\" t9=127i8";
snprintf(lineTemplate, templateLen, "%s", sample);
return 0;
}
int32_t getLineTemplate(char* lineTemplate, int templateLen, int numFields) {
if (numFields <= 4) {
char* sample = "sta%d,t3=%di32 c3=2147483647i32,c4=9223372036854775807i64,c9=11.12345f32,c10=22.123456789f64 %lld";
snprintf(lineTemplate, templateLen, "%s", sample);
return 0;
}
if (numFields <= 13) {
char* sample = "sta%d,t0=true,t1=127i8,t2=32767i16,t3=%di32,t4=9223372036854775807i64,t9=11.12345f32,t10=22.123456789f64,t11=\"binaryTagValue\",t12=L\"ncharTagValue\" c0=true,c1=127i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=254u8,c6=32770u16,c7=2147483699u32,c8=9223372036854775899u64,c9=11.12345f32,c10=22.123456789f64,c11=\"binaryValue\",c12=L\"ncharValue\" %lld";
snprintf(lineTemplate, templateLen, "%s", sample);
return 0;
}
char* lineFormatTable = "sta%d,t0=true,t1=127i8,t2=32767i16,t3=%di32 ";
</