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#include <test_helpers.hxx>
using namespace PGSTD;
using namespace pqxx;
namespace
{
void test_pipeline(transaction_base &trans)
{
// A pipeline grabs transaction focus, blocking regular queries and such.
pipeline pipe(trans, "test_pipeline_detach");
PQXX_CHECK_THROWS(
trans.exec("SELECT 1"),
logic_error,
"Pipeline does not block regular queries");
// Flushing a pipeline relinquishes transaction focus.
pipe.flush();
result r = trans.exec("SELECT 2");
PQXX_CHECK_EQUAL(r.size(), 1u, "Wrong query result after flushing pipeline.");
PQXX_CHECK_EQUAL(
r[0][0].as<int>(),
2,
"Query returns wrong data after flushing pipeline.");
// Inserting a query makes the pipeline grab transaction focus back.
pipeline::query_id q = pipe.insert("SELECT 2");
PQXX_CHECK_THROWS(
trans.exec("SELECT 3"),
logic_error,
"Pipeline does not block regular queries");
// Invoking complete() also detaches the pipeline from the transaction.
pipe.complete();
r = trans.exec("SELECT 4");
PQXX_CHECK_EQUAL(r.size(), 1u, "Wrong query result after complete().");
PQXX_CHECK_EQUAL(
r[0][0].as<int>(),
4,
"Query returns wrong data after complete().");
// The complete() also received any pending query results from the backend.
r = pipe.retrieve(q);
PQXX_CHECK_EQUAL(r.size(), 1u, "Wrong result from pipeline.");
PQXX_CHECK_EQUAL(
r[0][0].as<int>(),
2,
"Pipeline returned wrong data.");
// We can cancel while the pipe is empty, and things will still work.
pipe.cancel();
// Issue a query and cancel it.
pipe.retain(0);
pipe.insert("pg_sleep(10)");
pipe.cancel();
// TODO: Measure time to ensure we don't really wait.
}
} // namespace
PQXX_REGISTER_TEST(test_pipeline)
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