107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "taos.h"
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void do_query(TAOS* taos, const char* sql) {
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TAOS_RES* result = taos_query(taos, sql);
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int code = taos_errno(result);
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if (code) {
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printf("failed to query: %s, reason:%s\n", sql, taos_errstr(result));
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taos_free_result(result);
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return;
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}
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taos_free_result(result);
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}
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void do_stmt(TAOS* taos) {
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do_query(taos, "drop database if exists db");
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do_query(taos, "create database db");
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do_query(taos, "create table db.stb (ts timestamp, b binary(10)) tags(t1 int, t2 binary(10))");
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struct {
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int64_t ts[2];
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char b[16];
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} v;
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int32_t b_len[2], t64_len[2];
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char is_null[2] = {0};
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char is_null2[2] = {0, 2};
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// TAOS_STMT2_OPTION option = {0};
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// TAOS_STMT2_OPTION option = {0, true, true, stmtAsyncQueryCb, NULL};
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TAOS_STMT2_OPTION option = {0, true, false, NULL, NULL};
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char* tbs[2] = {"tb", "tb2"};
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int t1_val[2] = {0, 1};
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int t2_len[2] = {5, 5};
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int t3_len[2] = {sizeof(int), sizeof(int)};
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TAOS_STMT2_BIND tags[2][2] = {{{0, &t1_val[0], &t3_len[0], NULL, 0}, {0, "after1", &t2_len[0], NULL, 0}},
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{{0, &t1_val[1], &t3_len[1], NULL, 0}, {0, "after2", &t2_len[1], NULL, 0}}};
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TAOS_STMT2_BIND params[2][2] = {
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{{TSDB_DATA_TYPE_TIMESTAMP, v.ts, t64_len, is_null, 2}, {TSDB_DATA_TYPE_BINARY, v.b, b_len, NULL, 2}},
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{{TSDB_DATA_TYPE_TIMESTAMP, v.ts, t64_len, is_null, 2}, {TSDB_DATA_TYPE_BINARY, v.b, b_len, NULL, 2}}};
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TAOS_STMT2_BIND* tagv[2] = {&tags[0][0], &tags[1][0]};
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TAOS_STMT2_BIND* paramv[2] = {¶ms[0][0], ¶ms[1][0]};
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TAOS_STMT2_BINDV bindv = {2, &tbs[0], &tagv[0], ¶mv[0]};
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TAOS_STMT2* stmt = taos_stmt2_init(taos, &option);
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// Equivalent to :
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// const char* sql = "insert into db.? using db.stb tags(?, ?) values(?,?)";
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const char* sql = "insert into db.stb(tbname,ts,b,t1,t2) values(?,?,?,?,?)";
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int code = taos_stmt2_prepare(stmt, sql, 0);
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if (code != 0) {
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printf("failed to execute taos_stmt2_prepare. error:%s\n", taos_stmt2_error(stmt));
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taos_stmt2_close(stmt);
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return;
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}
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int fieldNum = 0;
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TAOS_FIELD_ALL* pFields = NULL;
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code = taos_stmt2_get_fields(stmt, &fieldNum, &pFields);
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if (code != 0) {
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printf("failed get col,ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_stmt2_error(stmt));
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} else {
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printf("col nums:%d\n", fieldNum);
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for (int i = 0; i < fieldNum; i++) {
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printf("field[%d]: %s, data_type:%d, field_type:%d\n", i, pFields[i].name, pFields[i].type,
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pFields[i].field_type);
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}
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}
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int64_t ts = 1591060628000;
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for (int i = 0; i < 2; ++i) {
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v.ts[i] = ts++;
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t64_len[i] = sizeof(int64_t);
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}
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strcpy(v.b, "abcdefg");
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b_len[0] = (int)strlen(v.b);
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strcpy(v.b + b_len[0], "xyz");
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b_len[1] = 3;
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taos_stmt2_bind_param(stmt, &bindv, -1);
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if (taos_stmt2_exec(stmt, NULL)) {
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printf("failed to execute insert statement.error:%s\n", taos_stmt2_error(stmt));
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taos_stmt2_close(stmt);
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return;
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}
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taos_stmt2_free_fields(stmt, pFields);
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taos_stmt2_close(stmt);
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}
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int main() {
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TAOS* taos = taos_connect("localhost", "root", "taosdata", "", 0);
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if (!taos) {
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printf("failed to connect to db, reason:%s\n", taos_errstr(taos));
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exit(1);
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}
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do_stmt(taos);
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taos_close(taos);
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taos_cleanup();
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}
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