Function checkTypesOfKeys

src/Interpreters/JoinUtils.cpp:390–409

}

void checkTypesOfKeys(const Block & block_left, const Names & key_names_left,
                      const Block & block_right, const Names & key_names_right)
{
    size_t keys_size = key_names_left.size();

    for (size_t i = 0; i < keys_size; ++i)
    {
        DataTypePtr left_type = removeNullable(recursiveRemoveLowCardinality(block_left.getByName(key_names_left[i]).type));
        DataTypePtr right_type = removeNullable(recursiveRemoveLowCardinality(block_right.getByName(key_names_right[i]).type));

        if (!left_type->equals(*right_type))
        {
            throw DB::Exception(
                ErrorCodes::TYPE_MISMATCH,
                "Type mismatch of columns to JOIN by: {} :: {} at left, {} :: {} at right",
                key_names_left[i], left_type->getName(),
                key_names_right[i], right_type->getName());
        }
    }
}

void checkTypesOfKeys(const Block & block_left, const Names & key_names_left, const String & condition_name_left,
                      const Block & block_right, const Names & key_names_right, const String & condition_name_right)