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2012年 7月 6日 (金) 17:23:04 JST
Kouhei Sutou 2012-07-06 17:23:04 +0900 (Fri, 06 Jul 2012) New Revision: ad7ebdbe0ce49cd20b033fadbf4b0e7784ed5f52 https://github.com/groonga/groonga/commit/ad7ebdbe0ce49cd20b033fadbf4b0e7784ed5f52 Log: doc: add some literals in script syntax Modified files: doc/source/reference/grn_expr/script_syntax.txt Modified: doc/source/reference/grn_expr/script_syntax.txt (+83 -2) =================================================================== --- doc/source/reference/grn_expr/script_syntax.txt 2012-07-06 15:05:07 +0900 (51efc3d) +++ doc/source/reference/grn_expr/script_syntax.txt 2012-07-06 17:23:04 +0900 (fccbd47) @@ -10,9 +10,90 @@ Script Syntax TODO: revised. -スクリプト構文はECMAScriptに類似した構文で条件式などを表現するための構文です。ECMAScriptにある演算子に加えてgroonga独自の演算子を追加しています。 +Script syntax is a syntax to specify complex search condition. It is +similar to ECMAScript. For example, ``_key == "book"`` means that +groonga searches records that ``_key`` value is ``"book"``. All values +are string in :doc:`/reference/grn_expr/query_syntax` but its own type +in script syntax. For example, ``"book"`` is string, ``1`` is integer, +``TokenBigram`` is the object whose name is ``TokenBigram`` and so +on. -まず、ECMAScriptにあるような基本的な演算子を説明し、その後、groongaが追加した独自の演算子を説明します。 +Script syntax has the original additional operators. They are +described after literals and basic oprators are described. + +Literals +-------- + +Integer +^^^^^^^ + +Integer literal is sequence of ``0`` to ``9`` such as +``1234567890``. ``+`` and ``-`` can be prepended such as ``+29`` and +``-29``. Integer literal must be decimal. Octal notation, hex and so +on can't be used. + +The maximum value of integer literal is ``9223372036854775807`` (``= 2 +** 63 - 1``). The minimum value of integer literal is +``-9223372036854775808`` (``= -(2 ** 63)``). + +Float +^^^^^ + +Float literal is sequence of ``0`` to ``9``, ``.`` and ``0`` to ``9`` +such as ``3.14``. ``+`` and ``-`` can be prepended such as ``+3.14`` +and ``-3.14``. ``${RADIX}e${EXPORNENTIAL}`` and +``${RADIX}E${EXPORNENTIAL}`` formats are also supported. For example, +``314e-2`` is the same as ``3.14``. + +String +^^^^^^ + +String literal is ``"..."``. You need to escape ``"`` in literal by +prepending ``\\'' such as ``\"``. For example, ``"Say \"Hello!\".`` is +a literal for ``Say "Hello!".`` string. + +String encoding must be the same as encoding of database. The default +encoding is UTF-8. It can be changed by ``--with-default-encoding`` +configure option, ``--encodiong`` :doc:`/executables/groonga` option +and so on. + +Boolean +^^^^^^^ + +Boolean literal is ``true`` and ``false``. ``true`` means true and +``false`` means false. + +Null +^^^^ + +Null literal is ``null``. Groonga doesn't support null value but null +literal is supported. + +Time +^^^^ + +TODO: ... + +Time literal doesn't exit. String time notation, integer time notation, +float time notation are used for it. + +Geo Point +^^^^^^^^^ + +TODO: ... + +Geo point literal doesn't exist. String geo point notation is used for +it. + +Array +^^^^^ + +TODO: ... + +Object Literal +^^^^^^^^^^^^^^ + +TODO: ... 基本的な演算子 -------------- -------------- next part -------------- HTML$B$NE:IU%U%!%$%k$rJ]4I$7$^$7$?(B...下載
