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#include <cstdio>
#include <cstring>
#include <iostream>
#include "test_helpers.hxx"
using namespace PGSTD;
using namespace pqxx;
// Test program for libpqxx. Query a table and report its metadata. Use lazy
// connection.
namespace
{
void test_030(transaction_base &)
{
const string Table = "pg_tables";
lazyconnection C;
work T(C, "test30");
result R( T.exec(("SELECT * FROM " + Table).c_str()) );
PQXX_CHECK(!R.empty(), "Table " + Table + " is empty, cannot test.");
// Print column names
for (pqxx::tuple::size_type c = 0; c < R.columns(); ++c)
{
string N= R.column_name(c);
cout << c << ":\t" << N << endl;
PQXX_CHECK_EQUAL(
R[0].column_number(N),
R.column_number(N),
"tuple::column_number() is inconsistent with result::column_number().");
PQXX_CHECK_EQUAL(
R[0].column_number(N.c_str()),
c,
"Inconsistent column numbers.");
}
// If there are rows in R, compare their metadata to R's.
if (R.empty())
{
cout << "(Table is empty.)" << endl;
return;
}
PQXX_CHECK_EQUAL(R[0].rownumber(), 0u, "Row 0 reports wrong number.");
if (R.size() < 2)
cout << "(Only one row in table.)" << endl;
else
PQXX_CHECK_EQUAL(R[1].rownumber(), 1u, "Row 1 reports wrong number.");
for (pqxx::tuple::size_type c = 0; c < R[0].size(); ++c)
{
string N = R.column_name(c);
PQXX_CHECK_EQUAL(
string(R[0].at(c).c_str()),
R[0].at(N).c_str(),
"Different field values by name and by number.");
PQXX_CHECK_EQUAL(
string(R[0][c].c_str()),
R[0][N].c_str(),
"at() is inconsistent with operator[].");
PQXX_CHECK_EQUAL(
R[0][c].name(),
N,
"Inconsistent field names.");
PQXX_CHECK_EQUAL(
size_t(R[0][c].size()),
strlen(R[0][c].c_str()),
"Inconsistent field lengths.");
}
}
} // namespace
PQXX_REGISTER_TEST_NODB(test_030)
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