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.. _configuration_values:
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All :ref:`configuration_options` and :ref:`configuration_variables` have
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values (NULL values are not allowed), and all values have a generic
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type. Value types are similar to, but simpler than, the SQL language
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Currently, options' value types are not documented, but most options clearly
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imply their value type.
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Numeric values are positive or negative integers. Some numeric values
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are constrained, which means that the value must be within a specific
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range. Currently, constraints are not documented, but
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:ref:`setting a variable <setting_variables>` out-of-range will cause
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String values are any kind of quoted strings. Since NULL values are
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not allowed, empty strings are sometimes used to mean "no value" or
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When :ref:`setting a variable <setting_variables>`, boolean values are
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one of the various true and false values listed for the
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:doc:`/boolean_data_type`. When setting a :ref:`boolean_options`,
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no value is need or allowed.
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Size values are like numeric values but allow optional size suffixes:
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K, M, and G. The size value ``1k`` is equivalent to the numeric value
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``1024``. Size values are shown as their equivalent numeric values
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when you :ref:`query the variables <querying_variables>`.
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.. note:: Only :ref:`configuration_options` can use size values. :ref:`configuration_variables` must use numeric values.
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Path values that are not absolute are prefixed with a path in the
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Drizzle installation directory. For example, if :option:`--pid-file`
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is set to :file:`drizzled.pid`, Drizzle prefixes that value with
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the :option:`--datadir` value, resulting in a value like
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:file:`/opt/drizzle/data/drizzled.pid`.
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If an option has a default value, ``drizzled --help`` gives it in parentheses
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after ``arg``, like ``(=drizzled-queries.log)``. The relevant documentation
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for an option should also list its default value, if any.
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docs/configuration/values.rst
