Avi Kivity d57395dce9 cql: prevent overflow when computing averages ...

Currently, we use type type of the column as the accumulator when we
average it. This can easily overflow, e.g. (2^31-1)+(3) = overflow.

Fix by using __int128 for the accumulator.  It's not standard, but
it's way more efficient and simpler than the alternatives.

Inspired by CASSANDRA-12417, but much simpler due to the availability
of __int128.
Message-Id: <20171112173529.30764-1-avi@scylladb.com>

2017-11-13 08:53:59 +01:00

..

abstract_function.hh

Replace iostream include with iosfwd in headers

2017-01-17 14:52:44 +02:00

aggregate_fcts.hh

cql: prevent overflow when computing averages

2017-11-13 08:53:59 +01:00

aggregate_function.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

bytes_conversion_fcts.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

castas_fcts.cc

cql3/functions: Add support for CAST AS functions.

2017-10-07 21:04:40 +02:00

castas_fcts.hh

cql3/functions: Add support for CAST AS functions.

2017-10-07 21:04:40 +02:00

function_call.hh

cql3: Introduce raw_value and raw_value_view types

2017-01-26 13:50:04 +02:00

function_name.hh

Replace iostream include with iosfwd in headers

2017-01-17 14:52:44 +02:00

function.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

functions.cc

cql3/functions: Add aggregate functions for big_decimal.

2017-11-12 15:53:13 +01:00

functions.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

native_aggregate_function.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

native_function.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

native_scalar_function.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

scalar_function.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

time_uuid_fcts.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

token_fct.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00

uuid_fcts.hh

Fix pre-ScyllaDB copyright statements

2016-04-08 08:12:47 +03:00