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bzip2/lz4/lzma/lzo/snappy compression is now provided via *services* they're almost like normal services, but in include/providers/ and they're supposed to provide exactly the same interface as original compression libraries (but not everything, only enough of if for the code to compile). the services are implemented via dummy functions that return corresponding error values (LZMA_PROG_ERROR, LZO_E_INTERNAL_ERROR, etc). the actual compression libraries are linked into corresponding provider plugins. Providers are daemon plugins that when loaded replace service pointers to point to actual compression functions. That is, run-time dependency on compression libraries is now on plugins, and the server doesn't need any compression libraries to run, but will automatically support the compression when a plugin is loaded. InnoDB and Mroonga use compression plugins now. RocksDB doesn't, because it comes with standalone utility binaries that cannot load plugins.
13 lines
395 B
Text
13 lines
395 B
Text
let $alg = $MTR_COMBINATIONS;
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--echo #
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--echo # Testing unloaded compression provider: $alg
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--echo #
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--echo # Innodb_have_$alg reflects that the provider is not loaded
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eval SHOW GLOBAL STATUS WHERE Variable_name = "Innodb_have_$alg";
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--echo # Innodb_compression_algorithm cannot be set to $alg
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error ER_WRONG_VALUE_FOR_VAR;
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eval SET GLOBAL Innodb_compression_algorithm = $alg;
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show warnings;
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