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44 lines
1.7 KiB
ReStructuredText
44 lines
1.7 KiB
ReStructuredText
Functions for working with external dictionaries
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------------------------------------------------
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For more information, see the section "External dictionaries".
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dictGetUInt8, dictGetUInt16, dictGetUInt32, dictGetUInt64
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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dictGetInt8, dictGetInt16, dictGetInt32, dictGetInt64
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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dictGetFloat32, dictGetFloat64
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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dictGetDate, dictGetDateTime
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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dictGetString
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~~~~~~~~~~~~~
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``dictGetT('dict_name', 'attr_name', id)``
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Gets the value of the 'attr_name' attribute from the 'dict_name' dictionary by the 'id' key.
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'dict_name' and 'attr_name' are constant strings.
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'id' must be UInt64.
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If the 'id' key is not in the dictionary, it returns the default value set in the dictionary definition.
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dictGetTOrDefault
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~~~~~~~~~~~~~~~~~
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``dictGetT('dict_name', 'attr_name', id, default)``
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Similar to the functions dictGetT, but the default value is taken from the last argument of the function.
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dictIsIn
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~~~~~~~~
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``dictIsIn('dict_name', child_id, ancestor_id)``
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For the 'dict_name' hierarchical dictionary, finds out whether the 'child_id' key is located inside 'ancestor_id' (or matches 'ancestor_id'). Returns UInt8.
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dictGetHierarchy
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~~~~~~~~~~~~~~~~
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``dictGetHierarchy('dict_name', id)``
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For the 'dict_name' hierarchical dictionary, returns an array of dictionary keys starting from 'id' and continuing along the chain of parent elements. Returns Array(UInt64).
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dictHas
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~~~~~~~
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``dictHas('dict_name', id)``
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check the presence of a key in the dictionary. Returns a value of type UInt8, equal to 0, if there is no key and 1 if there is a key.
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