64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
// TAOS standard API example. The same syntax as MySQL, but only a subet
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// to compile: gcc -o stmt2-get-fields stmt2-get-fields.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 "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,
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"create table db.stb (ts timestamp, b binary(10)) tags(t1 "
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"int, t2 binary(10))");
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TAOS_STMT2_OPTION option = {0};
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TAOS_STMT2 *stmt = taos_stmt2_init(taos, &option);
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const char *sql = "insert into db.stb(t1,t2,ts,b,tbname) 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_E *pFields = NULL;
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code = taos_stmt2_get_all_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,type:%d\n", i, pFields[i].name,pFields[i].field_type);
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}
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}
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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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} |