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| 1 | +#include <sql.h> |
| 2 | +#include <sqlext.h> |
| 3 | + |
| 4 | +#include <iostream> |
| 5 | +#include <cstring> |
| 6 | +#include <cstdlib> |
| 7 | +#include <cstdint> |
| 8 | + |
| 9 | +void PrintOdbcError(SQLSMALLINT handleType, SQLHANDLE handle) { |
| 10 | + SQLCHAR sqlState[6] = {0}; |
| 11 | + SQLINTEGER nativeError = 0; |
| 12 | + SQLCHAR message[256] = {0}; |
| 13 | + SQLSMALLINT textLength = 0; |
| 14 | + SQLGetDiagRec(handleType, handle, 1, sqlState, &nativeError, message, sizeof(message), &textLength); |
| 15 | + std::cerr << "ODBC error: [" << sqlState << "] " << message << std::endl; |
| 16 | +} |
| 17 | + |
| 18 | +int main() { |
| 19 | + SQLHENV henv = nullptr; |
| 20 | + SQLHDBC hdbc = nullptr; |
| 21 | + SQLHSTMT hstmt = nullptr; |
| 22 | + SQLRETURN ret; |
| 23 | + |
| 24 | + std::cout << "1. Allocating environment handle" << std::endl; |
| 25 | + ret = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv); |
| 26 | + if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) { |
| 27 | + std::cerr << "Error allocating environment handle" << std::endl; |
| 28 | + return 1; |
| 29 | + } |
| 30 | + SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0); |
| 31 | + |
| 32 | + std::cout << "2. Allocating connection handle" << std::endl; |
| 33 | + ret = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc); |
| 34 | + if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) { |
| 35 | + std::cerr << "Error allocating connection handle" << std::endl; |
| 36 | + SQLFreeHandle(SQL_HANDLE_ENV, henv); |
| 37 | + return 1; |
| 38 | + } |
| 39 | + |
| 40 | + std::cout << "3. Building connection string" << std::endl; |
| 41 | + std::string connStr = "Driver=" ODBC_DRIVER_PATH ";Endpoint=localhost:2136;Database=/local;"; |
| 42 | + SQLCHAR outConnStr[1024] = {0}; |
| 43 | + SQLSMALLINT outConnStrLen = 0; |
| 44 | + |
| 45 | + std::cout << "4. Connecting with SQLDriverConnect" << std::endl; |
| 46 | + ret = SQLDriverConnect(hdbc, NULL, (SQLCHAR*)connStr.c_str(), SQL_NTS, |
| 47 | + outConnStr, sizeof(outConnStr), &outConnStrLen, SQL_DRIVER_COMPLETE); |
| 48 | + if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) { |
| 49 | + std::cerr << "Error connecting with SQLDriverConnect" << std::endl; |
| 50 | + PrintOdbcError(SQL_HANDLE_DBC, hdbc); |
| 51 | + SQLFreeHandle(SQL_HANDLE_DBC, hdbc); |
| 52 | + SQLFreeHandle(SQL_HANDLE_ENV, henv); |
| 53 | + return 1; |
| 54 | + } |
| 55 | + |
| 56 | + std::cout << "5. Allocating statement handle" << std::endl; |
| 57 | + ret = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt); |
| 58 | + if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) { |
| 59 | + std::cerr << "Error allocating statement handle" << std::endl; |
| 60 | + SQLDisconnect(hdbc); |
| 61 | + SQLFreeHandle(SQL_HANDLE_DBC, hdbc); |
| 62 | + SQLFreeHandle(SQL_HANDLE_ENV, henv); |
| 63 | + return 1; |
| 64 | + } |
| 65 | + |
| 66 | + std::cout << "6. Executing query" << std::endl; |
| 67 | + SQLCHAR query[] = R"( |
| 68 | + DECLARE $p1 AS Int64; |
| 69 | + SELECT $p1 + 1, 'test1' as String; |
| 70 | + SELECT $p1 + 2, 'test2' as String; |
| 71 | + SELECT $p1 + 3, 'test3' as String; |
| 72 | + SELECT $p1 + 4, 'test4' as String; |
| 73 | + SELECT $p1 + 5, 'test5' as String; |
| 74 | + SELECT $p1 + 6, 'test6' as String; |
| 75 | + SELECT $p1 + 7, 'test7' as String; |
| 76 | + SELECT $p1 + 8, 'test8' as String; |
| 77 | + SELECT $p1 + 9, 'test9' as String; |
| 78 | + )"; |
| 79 | + |
| 80 | + int64_t paramValue = 42; |
| 81 | + SQLLEN paramInd = 0; |
| 82 | + ret = SQLBindParameter(hstmt, 1, SQL_PARAM_INPUT, SQL_C_SBIGINT, SQL_BIGINT, 0, 0, ¶mValue, 0, ¶mInd); |
| 83 | + if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) { |
| 84 | + std::cerr << "Error binding parameter" << std::endl; |
| 85 | + PrintOdbcError(SQL_HANDLE_STMT, hstmt); |
| 86 | + SQLFreeHandle(SQL_HANDLE_STMT, hstmt); |
| 87 | + SQLDisconnect(hdbc); |
| 88 | + SQLFreeHandle(SQL_HANDLE_DBC, hdbc); |
| 89 | + SQLFreeHandle(SQL_HANDLE_ENV, henv); |
| 90 | + return 1; |
| 91 | + } |
| 92 | + |
| 93 | + ret = SQLExecDirect(hstmt, query, SQL_NTS); |
| 94 | + if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) { |
| 95 | + std::cerr << "Error executing query" << std::endl; |
| 96 | + PrintOdbcError(SQL_HANDLE_STMT, hstmt); |
| 97 | + SQLFreeHandle(SQL_HANDLE_STMT, hstmt); |
| 98 | + SQLDisconnect(hdbc); |
| 99 | + SQLFreeHandle(SQL_HANDLE_DBC, hdbc); |
| 100 | + SQLFreeHandle(SQL_HANDLE_ENV, henv); |
| 101 | + return 1; |
| 102 | + } |
| 103 | + |
| 104 | + std::cout << "7. Fetching result" << std::endl; |
| 105 | + |
| 106 | + SQLLEN ind = 0; |
| 107 | + int value1 = 0; |
| 108 | + if (SQLBindCol(hstmt, 1, SQL_C_SLONG, &value1, 0, &ind) != SQL_SUCCESS) { |
| 109 | + std::cerr << "Error binding column 1" << std::endl; |
| 110 | + PrintOdbcError(SQL_HANDLE_STMT, hstmt); |
| 111 | + return 1; |
| 112 | + } |
| 113 | + |
| 114 | + SQLCHAR value2[1024] = {0}; |
| 115 | + if (SQLBindCol(hstmt, 2, SQL_C_CHAR, &value2, 1024, &ind) != SQL_SUCCESS) { |
| 116 | + std::cerr << "Error binding column 2" << std::endl; |
| 117 | + PrintOdbcError(SQL_HANDLE_STMT, hstmt); |
| 118 | + return 1; |
| 119 | + } |
| 120 | + |
| 121 | + while ((ret = SQLFetch(hstmt)) == SQL_SUCCESS || ret == SQL_SUCCESS_WITH_INFO) { |
| 122 | + if (ret != SQL_SUCCESS) { |
| 123 | + std::cerr << "Error fetching result" << std::endl; |
| 124 | + PrintOdbcError(SQL_HANDLE_STMT, hstmt); |
| 125 | + return 1; |
| 126 | + } |
| 127 | + |
| 128 | + std::cout << "Result column 1: " << value1 << std::endl; |
| 129 | + std::cout << "Result column 2: " << value2 << std::endl; |
| 130 | + |
| 131 | + std::cout << "--------------------------------" << std::endl; |
| 132 | + } |
| 133 | + |
| 134 | + std::cout << "8. Cleaning up" << std::endl; |
| 135 | + SQLFreeHandle(SQL_HANDLE_STMT, hstmt); |
| 136 | + SQLDisconnect(hdbc); |
| 137 | + SQLFreeHandle(SQL_HANDLE_DBC, hdbc); |
| 138 | + SQLFreeHandle(SQL_HANDLE_ENV, henv); |
| 139 | + |
| 140 | + return 0; |
| 141 | +} |
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