sqlpp11/tests/core/serialize/SelectColumns.cpp

/*
 * Copyright (c) 2024, Roland Bock
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#include "compare.h"
#include "Sample.h"
#include <sqlpp11/sqlpp11.h>

SQLPP_CREATE_NAME_TAG(id_count);

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

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

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

  // All columns of a table
  SQLPP_COMPARE(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,tab_foo.bool_n");

  // All columns of a table plus one more
  SQLPP_COMPARE(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_foo.bool_n,tab_bar.id");

  // One more, plus all columns of a table
  SQLPP_COMPARE(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,tab_foo.bool_n");

  // Column and aggregate function
  SQLPP_COMPARE(select(foo.doubleN, count(bar.id).as(id_count)), "SELECT tab_foo.double_n,COUNT(tab_bar.id) AS id_count");

  // Column aliases
  SQLPP_COMPARE(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");

  // Optional column manually
  SQLPP_COMPARE(select(dynamic(true, bar.id)), "SELECT tab_bar.id");
  SQLPP_COMPARE(select(dynamic(false, bar.id)), "SELECT NULL as id");

#warning: add more optional column tests

  return 0;
}