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https://github.com/rbock/sqlpp11.git
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bda77c620b
sqlpp::optional is an alias for std::optional for C++17 and beyond. Otherwise, it is a simple and incomplete backport. For older versions of C++, the library offers simple back Similar for string_view and span.
93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
#include "BlobSample.h"
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#include <sqlpp11/sqlite3/connection.h>
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#include <sqlpp11/sqlpp11.h>
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#ifdef SQLPP_USE_SQLCIPHER
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#include <sqlcipher/sqlite3.h>
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#else
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#include <sqlite3.h>
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#endif
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#include <functional>
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#include <iostream>
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#include <random>
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namespace sql = sqlpp::sqlite3;
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const auto tab = BlobSample{};
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/*
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* max default blob/text is 1,000,000,000
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* But 999,999,993 is the biggest one SQLITE will accept
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* without throwing SQLITE_TOOBIG
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* But it takes too long (over 5s) to generate and check
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*/
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constexpr size_t blob_size = 1000 * 1000ul;
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constexpr size_t blob_small_size = 999;
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void verify_blob(sql::connection& db, const std::vector<uint8_t>& expected, uint64_t id)
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{
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auto result = db(select(tab.data).from(tab).where(tab.id == id));
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const auto& result_row = result.front();
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if (!result_row.data)
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throw std::runtime_error("blob data is unpexpectedly NULL for id " + std::to_string(id));
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const auto received = *result_row.data;
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if (expected.size() != received.size())
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{
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std::cerr << "Size mismatch" << std::endl;
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throw std::runtime_error("Size mismatch " + std::to_string(expected.size()) +
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" != " + std::to_string(received.size()));
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}
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std::cerr << "Verifying content" << std::endl;
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for (size_t i = 0; i < expected.size(); i++)
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{
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if (expected[i] != received[i])
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{
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std::cerr << "expected[" << i << "] " << static_cast<int>(expected[i]) << " != received " << static_cast<int>(received[i])
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<< std::endl;
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throw std::runtime_error("Content mismatch");
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}
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}
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}
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int Blob(int, char*[])
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{
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sql::connection_config config;
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config.path_to_database = ":memory:";
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config.flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
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config.debug = true;
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sql::connection db(config);
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db.execute(R"(CREATE TABLE blob_sample (
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id INTEGER PRIMARY KEY,
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data blob
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))");
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std::cerr << "Generating data " << blob_size << std::endl;
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std::vector<uint8_t> data(blob_size);
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std::uniform_int_distribution<unsigned short> distribution(0, 255);
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std::mt19937 engine;
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auto generator = std::bind(distribution, engine);
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std::generate_n(data.begin(), blob_size, generator);
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std::vector<uint8_t> data_smaller(blob_small_size);
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std::generate_n(data_smaller.begin(), blob_small_size, generator);
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// If we use the bigger blob it will trigger SQLITE_TOOBIG for the query
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auto id = db(insert_into(tab).set(tab.data = data_smaller));
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auto prepared_insert = db.prepare(insert_into(tab).set(tab.data = parameter(tab.data)));
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prepared_insert.params.data = data;
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const auto prep_id = db(prepared_insert);
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prepared_insert.params.data.set_null();
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const auto null_id = db(prepared_insert);
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verify_blob(db, data_smaller, id);
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verify_blob(db, data, prep_id);
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{
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auto result = db(select(tab.data).from(tab).where(tab.id == null_id));
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const auto& result_row = result.front();
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std::cerr << "Null blob is_null:\t" << std::boolalpha << (result_row.data == sqlpp::nullopt) << std::endl;
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}
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return 0;
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}
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