Query Arguments

This section contains arguments that are used at certain level during the execution of a function that does not necessarily correspond to the function’s API. Command options affect the current command execution while execution options generally refer to global options. Separately, upload options only apply to upload commands, like crandas.crandas.upload_pandas_dataframe() and crandas.crandas.read_parquet().

Command options

• name (str, optional) - symbolic name for the table resulting from the computation

• dummy_for (str, optional) - Handle as string of 64 hexadecimal characters. This indicates that the table resulting from this computation should be interpreted as dummy data for the specified handle. May not be specified if name is also specified.

• mode (str ("open" / "defer" / "regular"), default: "regular") - mode in which to perform queries that return objects:

  • "regular": perform computation and wait, return metadata

  • "open": perform computation and return opened result

  • "defer": initate computation, do not wait for result

• add_nonce (bool, default: ``False``) - if True, add a nonce to the query so that it is guaranteed to be recomputed (instead of possibly re-using a cached result)

• bitlength (any) - Ignored for backward compatibility

• _keep (bool) - if False, table is not saved

• _return_job (bool, default False) - (internal) return Query object instead of result

Execution options

All execution options are optional; if not given, the default value from the session is used (e.g., if print_json is None, then session.print_json is used).

• print_json (bool/str/None) - Whether the query JSONs should be recorded

  • If None, use value from session (default: False)

  • If True, print JSON representations of performed queries to sys.stdout

  • If it is a string representing a file name, append to the corresponding file.

• authorization_file (str/None) - Name of file containing authorization(s) used to authorize the query.

  • If None, use value from session (default: False)

  • If False, then the query is sent without authorization

• dry_run (bool/None) - is it a dry run of the process

  • If None, use value from session (default: False)

  • If True, perform a dry run: do not actually perform the queries but instead return dummy values with of the type of the query result.

• authorizations (JSON-serializable list/ None) - A list of signed query to match authorization against.

  If None, use queries from currently running script

• session (session object/ None) - Session object to use

  If None, use crandas.base.session

• _return_job (bool) - (internal)

  If set to True, return query object instead of query result, for testing purposes. If set, no bulk data is uploaded

Upload options

These arguments apply to uploads:

• auto_bounds (bool, default: False, the default is configurable by config.settings.auto_bounds, see crandas.config) if True, do not warn about data-derived column bounds.

  It is recommended to always manually supply ctypes and the bounds therein for all columns, to avoid unintentionally leaking information about the data (for example, the maximum length of a string). For ease of use, the system does allow omitting the ctypes, and deriving them and the bounds from the data. However, to make sure the user intended for this, the default behavior is to print a warning whenever a bound was automatically derived from the data. Setting this parameter (or the session or configuration variable) to True disables the warning.