Skip to main content

This version of GitHub Enterprise Server was discontinued on 2023-09-25. No patch releases will be made, even for critical security issues. For better performance, improved security, and new features, upgrade to the latest version of GitHub Enterprise Server. For help with the upgrade, contact GitHub Enterprise support.

query decompile

[Plumbing] Read an intermediate representation of a compiled query from a .qlo file.

GitHub CodeQL is licensed on a per-user basis upon installation. You can use CodeQL only for certain tasks under the license restrictions. For more information, see "About the CodeQL CLI."

If you have a GitHub Advanced Security license, you can use CodeQL for automated analysis, continuous integration, and continuous delivery. For more information, see "About GitHub Advanced Security."

This content describes the most recent release of the CodeQL CLI. For more information about this release, see

To see details of the options available for this command in an earlier release, run the command with the --help option in your terminal.


codeql query decompile [--output=<file>] <options>... -- <file>


[Plumbing] Read an intermediate representation of a compiled query from a .qlo file.

The code will be written to standard output, unless the --output option is specified.


Primary Options


[Mandatory] QLO file to read from.

-o, --output=<file>

The file to write the desired output to.


The kind of the intermediate representation to read. The options are:

dil: A Datalog intermediate representation.

ra: A relational algebra intermediate representation. This is used by the query evaluation phase.

bytecode: Show the raw (uncompressed) bytecode from the .qlo file. Mostly useful for debugging the compiler/evaluator.

The default is dil if the query was compiled with --include-dil-in-qlo and ra otherwise

Common options

-h, --help

Show this help text.


[Advanced] Give option to the JVM running the command.

(Beware that options containing spaces will not be handled correctly.)

-v, --verbose

Incrementally increase the number of progress messages printed.

-q, --quiet

Incrementally decrease the number of progress messages printed.


[Advanced] Explicitly set the verbosity level to one of errors, warnings, progress, progress+, progress++, progress+++. Overrides -v and -q.


[Advanced] Write detailed logs to one or more files in the given directory, with generated names that include timestamps and the name of the running subcommand.

(To write a log file with a name you have full control over, instead give --log-to-stderr and redirect stderr as desired.)


[Advanced] Controls the location of cached data on disk that will persist between several runs of the CLI, such as downloaded QL packs and compiled query plans. If not set explicitly, this defaults to a directory named .codeql in the user's home directory; it will be created if it doesn't already exist.

Available since v2.15.2.