sqlpp11/tests/core/serialize/SelectColumns.cpp

/*
 * Copyright (c) 2024, Roland Bock
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
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 *  * Redistributions of source code must retain the above copyright notice,
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 *  * Redistributions in binary form must reproduce the above copyright notice,
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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#include "compare.h"
#include "Sample.h"
#include <sqlpp11/sqlpp11.h>

int SelectColumns(int, char*[])
{
  const auto foo = test::TabFoo{};
  const auto bar = test::TabBar{};

  // Single column
  compare(__LINE__, select(foo.doubleN), "SELECT tab_foo.double_n");

  // Two columns
  compare(__LINE__, select(foo.doubleN, bar.id), "SELECT tab_foo.double_n,tab_bar.id");

  // All columns of a table
  compare(__LINE__, select(all_of(foo)), "SELECT tab_foo.id,tab_foo.text_nn_d,tab_foo.int_n,tab_foo.double_n,tab_foo.u_int_n,tab_foo.blob_n");

  // All columns of a table plus one more
  compare(__LINE__, select(all_of(foo), bar.id), "SELECT tab_foo.id,tab_foo.text_nn_d,tab_foo.int_n,tab_foo.double_n,tab_foo.u_int_n,tab_foo.blob_n,tab_bar.id");

  // One more, plus all columns of a table
  compare(__LINE__, select(bar.id, all_of(foo)), "SELECT tab_bar.id,tab_foo.id,tab_foo.text_nn_d,tab_foo.int_n,tab_foo.double_n,tab_foo.u_int_n,tab_foo.blob_n");

  // Column and aggregate function
  compare(__LINE__, select(foo.doubleN, count(bar.id)), "SELECT tab_foo.double_n,COUNT(tab_bar.id) AS count_");

  // Column aliases
  compare(__LINE__, select(foo.doubleN.as(sqlpp::alias::o), count(bar.id).as(sqlpp::alias::a)), "SELECT tab_foo.double_n AS o,COUNT(tab_bar.id) AS a");

#warning: add optional column tests

  return 0;
}