Function getLimitForSorting

src/Interpreters/InterpreterSelectQuery.cpp:1119–1131

static UInt64 getLimitForSorting(const ASTSelectQuery & query, ContextPtr context)
{
    /// Partial sort can be done if there is LIMIT but no DISTINCT or LIMIT BY, neither ARRAY JOIN.
    if (!query.distinct && !query.limitBy() && !query.limit_with_ties && !query.arrayJoinExpressionList() && query.limitLength())
    {
        auto [limit_length, limit_offset] = getLimitLengthAndOffset(query, context);
        if (limit_length > std::numeric_limits<UInt64>::max() - limit_offset)
            return 0;

        return limit_length + limit_offset;
    }
    return 0;
}


static bool hasWithTotalsInAnySubqueryInFromClause(const ASTSelectQuery & query)