in Lua 5.3, lua_resume() only accepts three parameters, while in Lua 5.4,
this function accepts four parameters. so in order to be compatible with
Lua 5.3, we should not pass the 4th parameter to this function.
a macro is defined to conditionally pass this parameter based on the
Lua's version.
see https://www.lua.org/manual/5.3/manual.html#lua_resume
Refs 5b5b8b3264
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
Closesscylladb/scylladb#18450
The amount of standard Lua libraries loaded for the sstable-script was
limited, due to fears that some libraries (like the io library) could
expose methods, which if used from the script could interfere with
seastar's asynchronous arhitecture. So initially only the table and
string libraries were loaded.
This patch adds two more libraries to be loaded: match and os. The
former is self-explanatory and the latter contains methods to work with
date/time, obtain the values of environment variables as well as launch
external processes. None of these should interfere with seastar, on the
other hand the facilities they provide can come very handy for sstable
scripts.
Closesscylladb/scylladb#17126
1) mutation_partition_json_writer - containing all the low level
utilities for converting sub-fragment level mutation components (such
as rows, tombstones, etc.) and their components into json;
2) mutation_fragment_stream_json_writer - containing all the high level
logic for converting mutation fragment streams to json;
The latter using the former behind the scenes. The goal is to enable
reuse of converting mutation-fragments into json, without being forced
to work around differences in how the mutation fragments are reprenented
in json, on the higher level.
these warnings are found by Clang-17 after removing
`-Wno-unused-lambda-capture` and '-Wno-unused-variable' from
the list of disabled warnings in `configure.py`.
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
Schema related files are moved there. This excludes schema files that
also interact with mutations, because the mutation module depends on
the schema. Those files will have to go into a separate module.
Closes#12858
The Lua sstable consumer loads a script from the specified path then
feeds the mutation fragment stream to the script via the
sstable_consumer methods, each method of which the script is allowed to
define, effectively overloading the virtual method in Lua.
This allows for very wide and flexible customization opportunities for
what to extract from sstables and how to process and present them,
without the need to recompile the scylla-sstable tool.
