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#include "catch.hpp"
#include "duckdb/main/appender.hpp"
#include "test_helpers.hpp"
#include <atomic>
#include <thread>
#include <vector>
using namespace duckdb;
using namespace std;
atomic<int> finished_threads;
#define THREAD_COUNT 8
#define INSERT_ELEMENTS 2000
static void append_to_integers(DuckDB *db, size_t threadnr) {
Connection con(*db);
Appender appender(con, "integers");
for (size_t i = 0; i < INSERT_ELEMENTS; i++) {
appender.BeginRow();
appender.Append<int32_t>(1);
appender.EndRow();
}
finished_threads++;
while (finished_threads != THREAD_COUNT)
;
appender.Close();
}
TEST_CASE("Test concurrent appends", "[appender][.]") {
duckdb::unique_ptr<QueryResult> result;
DBConfig config;
config.options.maximum_threads = 1;
DuckDB db(nullptr, &config);
Connection con(db);
// create a single table to append to
REQUIRE_NO_FAIL(con.Query("CREATE TABLE integers(i INTEGER)"));
finished_threads = 0;
thread threads[THREAD_COUNT];
for (size_t i = 0; i < THREAD_COUNT; i++) {
threads[i] = thread(append_to_integers, &db, i);
}
for (size_t i = 0; i < THREAD_COUNT; i++) {
threads[i].join();
}
// check how many entries we have
result = con.Query("SELECT COUNT(*) FROM integers");
REQUIRE(CHECK_COLUMN(result, 0, {THREAD_COUNT * INSERT_ELEMENTS}));
}
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