{"id":12132,"date":"2022-10-05T23:31:11","date_gmt":"2022-10-05T14:31:11","guid":{"rendered":"https:\/\/prodskill.com\/?p=12132"},"modified":"2022-10-05T23:49:46","modified_gmt":"2022-10-05T14:49:46","slug":"sybase-ase-utf8-byte-char-length","status":"publish","type":"post","link":"https:\/\/prodskill.com\/es\/sybase-ase-utf8-byte-char-length\/","title":{"rendered":"Una funci\u00f3n para obtener la cantidad de bytes y caracteres UTF-8 en una cadena Sybase ASE"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited.jpeg\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"540\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited.jpeg\" alt=\"Server: (\ucd9c\ucc98: \uc12c\uae30\ub294 \uc0ac\ub78c \uad6c\ub984 \uac1c\ubc1c - Pixabay\uc758 \ubb34\ub8cc \uc0ac\uc9c4)\" class=\"wp-image-12134\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited.jpeg 960w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited-300x169.jpeg 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited-768x432.jpeg 768w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited-18x10.jpeg 18w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited-24x14.jpeg 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited-36x20.jpeg 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-2-edited-48x27.jpeg 48w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><figcaption>Servidor: (Fuente: <a href=\"https:\/\/pixabay.com\/ko\/photos\/%ec%84%ac%ea%b8%b0%eb%8a%94-%ec%82%ac%eb%9e%8c-%ea%b5%ac%eb%a6%84-%ea%b0%9c%eb%b0%9c-%ec%82%ac%ec%97%85-1235959\/\" target=\"_blank\" rel=\"noreferrer noopener\">Servidor Nube Desarrollo - Foto gratis en Pixabay<\/a>)<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Echemos un vistazo a las funciones para encontrar la cantidad de bytes y caracteres UTF-8 en Sybase ASE DBMS. Esta funci\u00f3n se cre\u00f3 y utiliz\u00f3 en un proyecto que convierte la codificaci\u00f3n no Unicode de Sybase ASE, EUC-KSC, a la codificaci\u00f3n Unicode, UTF-8.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>* Codificaci\u00f3n UTF-8 Nota: <a href=\"https:\/\/ko.wikipedia.org\/wiki\/UTF-8\" target=\"_blank\" rel=\"noreferrer noopener\">UTF-8 \u2013 Wikipedia, la enciclopedia de todos (wikipedia.org)<\/a><\/p><\/blockquote>\n\n\n\n<p>Al convertir una columna declarada como varchar(10) en EUC-KSC a UTF-8, es necesario verificar el n\u00famero m\u00e1ximo de bytes y caracteres.<\/p>\n\n\n\n<p>Al convertir a UTF-8, la cantidad m\u00e1xima de bytes y caracteres es necesaria para determinar cu\u00e1nto declarar la longitud m\u00e1xima de una columna de cadena. Esta funci\u00f3n se us\u00f3 para calcular el valor m\u00e1ximo calculando la cantidad de bytes y caracteres convertidos a la codificaci\u00f3n UTF-8 para el valor almacenado en la codificaci\u00f3n EUC-KSC, que no es la longitud declarada.<\/p>\n\n\n\n<p>El DBMS se prob\u00f3 en Sybase ASE v15.5. No lo he probado en otras versiones, pero creo que deber\u00eda funcionar.<\/p>\n\n\n\n<p>Sybase ASE es muy similar a MS-SQL, por lo que puede usarlo sin ninguna modificaci\u00f3n en MS-SQL.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">&lt;&lt;Tabla de contenidos&gt;&gt;<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Pesta\u00f1a de contenido alternativo\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Palanca<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/prodskill.com\/es\/sybase-ase-utf8-byte-char-length\/#1_UTF-8_%EB%B0%94%EC%9D%B4%ED%8A%B8%EC%88%98_%EA%B5%AC%ED%95%98%EA%B8%B0_%ED%95%A8%EC%88%98\" >1. Funci\u00f3n de conteo de bytes UTF-8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/prodskill.com\/es\/sybase-ase-utf8-byte-char-length\/#2_UTF-8_%EA%B8%80%EC%9E%90%EC%88%98_%EA%B5%AC%ED%95%98%EA%B8%B0_%ED%95%A8%EC%88%98\" >2. Funci\u00f3n para encontrar el n\u00famero de caracteres UTF-8<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_UTF-8_%EB%B0%94%EC%9D%B4%ED%8A%B8%EC%88%98_%EA%B5%AC%ED%95%98%EA%B8%B0_%ED%95%A8%EC%88%98\"><\/span>1. Funci\u00f3n de conteo de bytes UTF-8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"18,21,23,25\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">IF OBJECT_ID('dbo.GET_UTF8_BYTE') IS NOT NULL\n  DROP FUNCTION dbo.GET_UTF8_BYTE\nGO\n\nCREATE FUNCTION dbo.GET_UTF8_BYTE\n(\n    @IN_VAL VARCHAR(4000)\n)\nRETURNS INT\nAS\nBEGIN\n  DECLARE @CHK_LENGTH INT, @I INT, @CHK_BYTE INT, @BYTE_LEN INT, @UTF8_BYTE_LEN INT, @SUM_UTF8_BYTE_LEN INT\n\n  SELECT @I = 1, @CHK_LENGTH = LEN(@IN_VAL), @SUM_UTF8_BYTE_LEN = 0\n\n  WHILE @I &lt;= @CHK_LENGTH\n  BEGIN\n    SELECT @CHK_BYTE = ASCII(SUBSTRING(@IN_VAL, @I, 1))\n\n    IF @CHK_BYTE >= 128 -- ASCII \ucf54\ub4dc\uac00 alpha, numeric, control \ubb38\uc790 \ubc94\uc704\ub97c \ub118\ub294 \uacbd\uc6b0(2 Byte \ubb38\uc790\uc77c \uacbd\uc6b0)\n        SELECT @BYTE_LEN = 2, @UTF8_BYTE_LEN = 3\n    ELSE\n        SELECT @BYTE_LEN = 1, @UTF8_BYTE_LEN = 1\n\n    SELECT @SUM_UTF8_BYTE_LEN = @SUM_UTF8_BYTE_LEN + @UTF8_BYTE_LEN, @I = @I + @BYTE_LEN\n  END\n\n  RETURN @SUM_UTF8_BYTE_LEN\nEND\nGO<\/pre>\n\n\n\n<p>Este c\u00f3digo fue escrito en base a los siguientes hechos.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Si el c\u00f3digo ASCII de 1 byte no Unicode es 128 o superior, el car\u00e1cter de 2 bytes (coreano, chino, japon\u00e9s, etc.)<\/li><li>El car\u00e1cter no Unicode Hangul 1 (2 bytes) se almacena como 3 bytes en codificaci\u00f3n UTF-8<\/li><\/ul>\n\n\n\n<p>La explicaci\u00f3n del c\u00f3digo principal es la siguiente.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>L\u00ednea 18: Lea la cadena de entrada byte por byte.<\/li><li>L\u00ednea 21: establezca la longitud de los bytes para omitir si el c\u00f3digo ASCII de los bytes le\u00eddos es mayor o igual a 128, aumente el n\u00famero de bytes UTF-8 en 3<\/li><li>L\u00ednea 23: si el c\u00f3digo ASCII de los bytes le\u00eddos es inferior a 128, configure la longitud de bytes para saltar a 1, incremente el n\u00famero de bytes UTF-8 en 1<\/li><li>L\u00ednea 25: Acumule la suma de bytes UTF-8, incremente el valor de la variable de condici\u00f3n @I en el ciclo WHILE por la longitud de bytes para omitir<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_UTF-8_%EA%B8%80%EC%9E%90%EC%88%98_%EA%B5%AC%ED%95%98%EA%B8%B0_%ED%95%A8%EC%88%98\"><\/span>2. Funci\u00f3n para encontrar el n\u00famero de caracteres UTF-8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La funci\u00f3n anterior se puede modificar de la siguiente manera para obtener la cantidad de caracteres en lugar de la cantidad de bytes UTF-8.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">IF OBJECT_ID('dbo.GET_CHAR_CNT') IS NOT NULL\n  DROP FUNCTION dbo.GET_CHAR_CNT\nGO\n\nCREATE FUNCTION dbo.GET_CHAR_CNT\n(\n    @IN_VAL VARCHAR(4000)\n)\nRETURNS INT\nAS\nBEGIN\n  DECLARE @CHK_LENGTH INT, @I INT, @CHK_BYTE INT, @BYTE_LEN INT, @UTF8_BYTE_LEN INT, @SUM_UTF8_BYTE_LEN INT, @SUM_CHAR_CNT INT\n\n  SELECT @I = 1, @CHK_LENGTH = LEN(@IN_VAL), @SUM_UTF8_BYTE_LEN = 0, @SUM_CHAR_CNT = 0\n\n  WHILE @I &lt;= @CHK_LENGTH\n  BEGIN\n    SELECT @CHK_BYTE = ASCII(SUBSTRING(@IN_VAL, @I, 1))\n\n    IF @CHK_BYTE >= 128 -- ASCII \ucf54\ub4dc\uac00 alpha, numeric, control \ubb38\uc790 \ubc94\uc704\ub97c \ub118\ub294 \uacbd\uc6b0(2 Byte \ubb38\uc790\uc77c \uacbd\uc6b0)\n        SELECT @BYTE_LEN = 2, @UTF8_BYTE_LEN = 3\n    ELSE\n        SELECT @BYTE_LEN = 1, @UTF8_BYTE_LEN = 1\n\n    SELECT @SUM_UTF8_BYTE_LEN = @SUM_UTF8_BYTE_LEN + @UTF8_BYTE_LEN, @I = @I + @BYTE_LEN\n    SELECT @SUM_CHAR_CNT = @SUM_CHAR_CNT + 1\n  END\n\n  --RETURN @SUM_UTF8_BYTE_LEN\n  RETURN @SUM_CHAR_CNT\nEND<\/pre>\n\n\n\n<p>El ciclo WHILE que comienza en la l\u00ednea 16 termina con la variable @I como condici\u00f3n. La variable @BYTE_LEN se establece en 2 (car\u00e1cter de doble byte) o 1 (car\u00e1cter de un solo byte) seg\u00fan el c\u00f3digo ASCII del byte le\u00eddo, y se agrega a @I en la l\u00ednea 25. Con esta l\u00f3gica, la instrucci\u00f3n de bucle WHILE se ejecuta repetidamente tantas veces como el n\u00famero de caracteres.<\/p>\n\n\n\n<p>La raz\u00f3n por la que @SUM_CHAR_CNT se incrementa en 1 en la l\u00ednea 26 es que el n\u00famero de repeticiones es el n\u00famero de caracteres.<\/p>","protected":false},"excerpt":{"rendered":"<p>Echemos un vistazo a las funciones para encontrar la cantidad de bytes y caracteres UTF-8 en Sybase ASE DBMS. Esta funci\u00f3n se cre\u00f3 y utiliz\u00f3 en un proyecto que convierte la codificaci\u00f3n no Unicode de Sybase ASE, EUC-KSC, a la codificaci\u00f3n Unicode, UTF-8. * Codificaci\u00f3n UTF-8 Referencia: UTF-8 \u2013 Wikipedia, la enciclopedia de todos nosotros (wikipedia.org) EUC-KSC convierte columnas declaradas como varchar(10) a UTF-8...<\/p>","protected":false},"author":1,"featured_media":12133,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[268,269],"class_list":["post-12132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sybase-ase","tag-sybase-ase","tag-utf-8"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sybase ASE \ubb38\uc790\uc5f4\uc758 UTF-8 \ubc14\uc774\ud2b8\uc218 , \uae00\uc790\uc218 \uad6c\ud558\ub294 \ud568\uc218 - \uc0dd\uc0b0\uc131 Skill<\/title>\n<meta name=\"description\" content=\"Sybase ASE DBMS\uc5d0\uc11c UTF-8 \ubc14\uc774\ud2b8\uc218 \uae00\uc790\uc218 \uad6c\ud558\ub294 \ud568\uc218\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubcf8\ub2e4. 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