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77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
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#include <pqxx/transaction>
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#include "test_helpers.hxx"
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using namespace pqxx;
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// Example/test program for libpqxx. Perform a query and enumerate its output
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// using array indexing.
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namespace
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{
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void bad_connect()
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{
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connection conn{"totally#invalid@connect$string!?"};
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}
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void test_002()
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{
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// Before we really connect, test the expected behaviour of the default
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// connection type, where a failure to connect results in an immediate
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// exception rather than a silent retry.
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PQXX_CHECK_THROWS_EXCEPTION(
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bad_connect(), "Invalid connection string did not cause exception.");
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// Set up connection to database
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std::string ConnectString;
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connection C{ConnectString};
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// Start transaction within context of connection.
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work T{C, "test2"};
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// Perform query within transaction.
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result R(T.exec("SELECT * FROM pg_tables"));
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// Let's keep the database waiting as briefly as possible: commit now,
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// before we start processing results. We could do this later, or since
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// we're not making any changes in the database that need to be committed,
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// we could in this case even omit it altogether.
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T.commit();
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// Ah, this version of postgres will tell you which table a column in a
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// result came from. Let's just test that functionality...
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oid const rtable{R.column_table(0)};
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PQXX_CHECK_EQUAL(
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rtable, R.column_table(pqxx::row::size_type(0)),
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"Inconsistent answers from column_table()");
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std::string const rcol{R.column_name(0)};
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oid const crtable{R.column_table(rcol)};
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PQXX_CHECK_EQUAL(
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crtable, rtable, "Field looked up by name gives different origin.");
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// Now we've got all that settled, let's process our results.
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for (auto const &f : R)
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{
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oid const ftable{f[0].table()};
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PQXX_CHECK_EQUAL(ftable, rtable, "field::table() is broken.");
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oid const ttable{f.column_table(0)};
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PQXX_CHECK_EQUAL(
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ttable, f.column_table(pqxx::row::size_type(0)),
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"Inconsistent pqxx::row::column_table().");
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PQXX_CHECK_EQUAL(ttable, rtable, "Inconsistent result::column_table().");
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oid const cttable{f.column_table(rcol)};
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PQXX_CHECK_EQUAL(cttable, rtable, "pqxx::row::column_table() is broken.");
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}
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}
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PQXX_REGISTER_TEST(test_002);
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} // namespace
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