{"id":8492,"date":"2021-09-26T09:10:53","date_gmt":"2021-09-26T01:10:53","guid":{"rendered":"http:\/\/www.hefeiyu.com\/?p=8492"},"modified":"2021-09-30T09:38:25","modified_gmt":"2021-09-30T01:38:25","slug":"day22typefunctioninterface%e8%ae%a9fgl%e6%9b%b4%e8%b4%b4%e8%bf%91%e5%af%b9%e8%b1%a1%e8%af%ad%e8%a8%80","status":"publish","type":"post","link":"https:\/\/www.hefeiyu.com\/?p=8492","title":{"rendered":"[day22]TYPE\/FUNCTION\/INTERFACE\u8ba9FGL\u66f4\u8d34\u8fd1\u5bf9\u8c61\u8bed\u8a00"},"content":{"rendered":"<h2>\u6587\u7ae0\u6765\u81ea\uff1a<a href=\"https:\/\/ithelp.ithome.com.tw\/users\/20051169\">iT \u90a6\u5e6b\u5fd9::\u4e00\u8d77\u5e6b\u5fd9\u89e3\u6c7a\u96e3\u984c\uff0c\u62ef\u6551 IT \u4eba\u7684\u4e00\u5929 (ithome.com.tw)<\/a><\/h2>\n<h2>[day22]TYPE\/FUNCTION\/INTERFACE\u8ba9FGL\u66f4\u8d34\u8fd1\u5bf9\u8c61\u8bed\u8a00<\/h2>\n<h3>TYPE<\/h3>\n<p><strong>\u5b9a\u4e49\u57fa\u672c\u6216\u7ed3\u6784\u5316\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n<p>\u4ece Genero 2.50\u5f00\u59cb\uff0c\u539f\u5148\u7684 DEFINE\u5b9a\u4e49\u533a\u5757\uff0c\u5f00\u59cb\u652f\u6301 TYPE\u3002\u8fd9\u662f\u53ef\u4ee5\u7ed3\u6784\u5316\u5b9a\u4e49\u6570\u7ec4(RECORD)\u3002\u7136\u540e\u5728\u9700\u8981\u7684\u5730\u65b9\u8c03\u7528\u3002<\/p>\n<p>&nbsp;<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"null\">PRIVATE TYPE type_abc RECORD\r\n       col01  VARCHAR(100),\r\n       col02  LIKE table_A.col02\r\n          END RECORD\r\nPUBLIC TYPE type_desk RECORD   #\u684c\u5b50\r\n       length  INT,     #\u957f\r\n       height  INT,     #\u9ad8\r\n       shape  RECORD\r\n         drawer  INT    #\u62bd\u5c49\u6570\r\n              END RECORD\r\n           END RECORD\r\nDEFINE desk1 type_desk   #\u547d\u540d\u4e00\u4e2a desk1<\/code><\/pre>\n<p>\u5229\u7528\u8fd9\u6837\u7684\u7ed3\u6784\uff0c\u53ef\u4ee5\u5728\u7a0b\u5e8f\u7684\u4efb\u4f55\u5730\u65b9\u8f7b\u677e\u5730\u751f\u6210\u7ed3\u6784\uff0c\u8c03\u6574\u7684\u65f6\u5019\u4e5f\u53ef\u907f\u514d\u5230\u5904\u8c03\u6574\u3002\u6700\u524d\u7aef\u7684 PUBLIC\/PRIVATE\u5219\u662f\u6807\u793a\u4e86\uff1a<strong>\u5f53\u8fd9\u652f4GL\u88ab IMPORT\u7684\u65f6\u5019\uff0c\u80fd\u5426\u5728\u5f15\u7528\u4f5c\u4e1a\u4e2d\u76f4\u63a5\u8c03\u7528TYPE<\/strong><\/p>\n<p>\u5f53 TYPE\u5230 Genero 3.20\u4ee5\u540e\u7684\u7248\u672c\uff0c\u5f00\u59cb\u652f\u6301 ATTRIBUTES \u5c5e\u6027\u914d\u7f6e\uff0c\u53ef\u4ee5\u642d\u914d REST WEB SERVICE\u7684\u914d\u7f6e\uff0c\u8fd9\u90e8\u5206\u6682\u65f6\u7565\u8fc7\u4e0d\u63d0<\/p>\n<h3>FUNCTION<\/h3>\n<p>\u51fd\u5f0f\u540d\u79f0\u5b9a\u4e49\u3002<\/p>\n<p>\u5176\u5b9e FUNCTION \u4ece Genero 3.0\u5f00\u59cb\u4e0d\u65ad\u7684\u5728\u589e\u52a0\u65b0\u8bed\u6cd5\uff0c\u9664\u4e86\u539f\u5148\u5355\u7eaf\u5b9a\u4e49\u4e4b\u5916\u8fd8\u6709\u4e0b\u5217\u7684\u65b0\u8bed\u6cd5(Genero3.X\u4ee5\u540e\u652f\u6301\uff0c\u65e7\u7248\u672c\u65e0\u6cd5\u7f16\u8bd1\u6b64\u65b0\u8bed\u6cd5)\uff1a<\/p>\n<p>\u8bed\u6cd51<\/p>\n<p>PUBLIC FUNCTION func_abc( input_var )<\/p>\n<p>\u900f\u8fc7\u8fd9\u6837\u7684\u8bed\u6cd5\uff0c\u56e0\u4e3a\u662f PUBLIC \u7684\uff0c\u6240\u4ee5\u53ef\u4ee5\u5728\u4efb\u4f55 42m \u8c03\u52a8\u6b64 function_abc\uff0c\u4e14\u4f20\u5165\u53c2\u6570 input_var<\/p>\n<p>\u8bed\u6cd52<\/p>\n<p>PUBLIC FUNCTION func_abc( input_var INT, comm_var INT INOUT ) RETURNS (INT, INT)<\/p>\n<p>\u4eceGenero 3.20\u5f00\u59cb\uff0c\u5728\u8bbe\u5b9a\u4f20\u5165\u53c2\u6570\u7684\u65f6\u5019\u53ef\u4ee5\u4e00\u5e76\u6307\u5b9a\u578b\u6001\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11DEFINE\u7684\u91cf\u3002\u4f46\u6b64\u5904\u4e0d\u53ef\u4f7f\u7528 LIKE\u7684\u65b9\u5f0f\u6307\u5b9a\u3002INOUT\u6807\u5b9a\u8be5\u53c2\u6570\u540c\u65f6\u4f20\u5165\u4f20\u51fa\uff0c\u4f7f\u7528 CALL BY REFERENCE\u7684\u505a\u6cd5\u3002<br \/>\n\u6700\u540e\u7684 RETURNS (**\u6ce8\u610f\u4e0d\u662fRETURN \u4e5f\u4e0d\u662f RETURNING **)\uff0c\u5219\u662f\u6807\u5b9a\u56de\u4f20\u5e94\u4e3a\u4e24\u4e2a INT\uff0c\u505a\u7f16\u8bd1\u65f6\u7684\u578b\u522b\u68c0\u67e5\u7528\u3002(\u5355\u4e00\u4e2a\u7684\u65f6\u5019\uff0c\u4e0d\u9700\u8981\u52a0\u4e0a\u62ec\u53f7)<\/p>\n<p>\u8bed\u6cd53\u5219\u76f4\u63a5\u4e0a\u8303\u4f8b\u8fdb\u884c\u89e3\u8bf4<\/p>\n<p>&nbsp;<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"null\">TYPE Rectangle RECORD               #\u5b9a\u4e49\u4e00\u4e2a\u77e9\u5f62\r\n    height, width DOUBLE PRECISION  #\u5b58\u5728\u957f\u3001\u5bbd  \u53cc\u7cbe\u5ea6\u6570\u503c  \r\nEND RECORD\r\n\r\n#\u4e0b\u9762\u7684 FUNCTION\u5728\u5b9a\u4e49 \u5bf9\u8c61(TYPE)\u6240\u9700\u8981\u7684 \"\u65b9\u6cd5\"\r\n# \u7269\u4ef6 r \u7684 TYPE\u4e3a Rectangle\r\n#                  \u65b9\u6cd5:\u7b97\u9762\u79ef  \u56de\u4f20  \u9762\u79ef\u7684\u53cc\u7cbe\u5ea6\u6570\u503c\r\nFUNCTION (r Rectangle) area() RETURNS DOUBLE PRECISION\r\n    RETURN r.height * r.width   #\u7b97\u6cd5\u662f\u957f x \u5bbd\r\nEND FUNCTION\r\n<\/code><\/pre>\n<p>&nbsp;<\/p>\n<p>\u6240\u4ee5 TYPE\u53ef\u4ee5\u662f\u4e00\u4e2a\u5bf9\u8c61\u5b9a\u4e49\uff0c\u900f\u8fc7 FUNCTION \u7ed1\u4e0a\u8be5\u5bf9\u8c61\u53ef\u64cd\u4f5c\u7684\u65b9\u6cd5\uff0c\u63a5\u7740\u5c31\u53ef\u4ee5\u64cd\u4f5c\u4e3a<\/p>\n<p>DEFINE a Rectangle<\/p>\n<p>LET a.height = 10<\/p>\n<p>LET a.width = 20<\/p>\n<p>DISPLAY a.area() #\u51fa\u73b0 200<\/p>\n<p>\u6b64\u5904\u9700\u8981\u7279\u522b\u6ce8\u610f\uff0c\u300e\u53d8\u91cf\u540d\u79f0\u300f\u548c\u300e\u65b9\u6cd5\u540d\u79f0\u300f\u4e0d\u53ef\u4ee5\u4e00\u6837\uff0c\u5426\u5219\u4f1a\u51fa\u73b0 -8427 \u7684\u9519\u8bef<br \/>\n| Method and field names must be different. Type rectangle.Rectangle has field width.<br \/>\n| See error number -8427.<\/p>\n<p>\u7136\u540e FUNCTION \u540e\u65b9\u7684 RETURNS \u4e00\u5b9a\u8981\u6807\u6ce8(\u6ca1\u56de\u4f20\u4e5f\u8981\u6807\u6ce8)\uff0c\u5426\u5219\u4f1a\u51fa\u73b0 -8431\u7684\u9519\u8bef<br \/>\n| A method without return type (RETURNS) can not return values.<br \/>\n| See error number -8431.<\/p>\n<h3>INTERFACE<\/h3>\n<p>** GENERO 3.20\u4ee5\u540e\u7248\u672c\u63d0\u4f9b **<br \/>\n\u53d8\u91cf\u53ef\u4ee5\u900f\u8fc7\u6570\u7ec4(RECORD)\uff0c\u9884\u5148\u5b9a\u4e49\u51fa\u7ed3\u6784(TYPE)\uff1a\u90a3\u4e00\u5806\u7c7b\u4f3c\u7684\u65b9\u6cd5(METHOD)\u53ef\u4ee5\u9884\u5148\u5b9a\u4e49\u51fa\u7ed3\u6784\u5417\uff1f\u90a3\u53eb\u505a\u4ec0\u4e48\uff1f<br \/>\n\u5bf9\uff0c\u53ef\u4ee5\u7684\uff0c\u90a3\u5c31\u53eb\u505a INTERFACE\u3002<\/p>\n<p>\u63a5\u7eed\u4e0a\u4e00\u4e2a\u56db\u8fb9\u5f62(Rectangle)\u7684\u8303\u4f8b\u8fdb\u884c<\/p>\n<p>TYPE Shape INTERFACE #\u7ed3\u6784\u5316\u4e00\u4e2a&#8221;\u63a5\u53e3&#8221;<\/p>\n<p>area() RETURNS FLOAT, #\u5185\u542b\u4e24\u79cd\u65b9\u6cd5<\/p>\n<p>kind() RETURNS STRING<\/p>\n<p>END INTERFACE<\/p>\n<p>\u51c6\u5907\u597d\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u4e86\uff1a<\/p>\n<p>DEFINE r Rectangle = ( height:10, width:20 ) #\u5b9a\u4e49\u987a\u4fbf\u76f4\u63a5\u5c06\u6570\u503c\u5e26\u5165<\/p>\n<p>DEFINE v1 Shape #\u53d6\u7528 Shape \u8fd9\u4e2a\u65b9\u6cd5\u96c6<\/p>\n<p>LET v1 = r #\u8fd9\u4e2a INTERFACE \u9009\u7528\u7684\u662f r (Rectangle)<\/p>\n<p>DISPLAY v1.area() #\u76f4\u63a5\u8c03\u52a8 INTERFACE\u5185\u7684 .area() \u65b9\u6cd5<\/p>\n<p>\u5bf9\u7684\uff0c\u4e3a\u4e86\u9002\u5e94\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0cDEFINE\u53ef\u4ee5\u76f4\u63a5\u5c06\u9700\u8981\u7684\u5143\u7d20\u6570\u636e\u5728 DEFINE\u8fc7\u7a0b\u4e2d\u76f4\u63a5\u653e\u5165\u3002<\/p>\n<p>\u6709\u6ca1\u6709\u5f00\u59cb\u6709\u70b9\u4e0d\u8ba4\u8bc6 FGL\u4e86\uff1f\u4e3a\u4e86\u80fd\u8ddf\u5bf9\u8c61\u4f53\u7cfb\u6709\u66f4\u597d\u7684\u6574\u5408\uff0c\u4e5f\u4fdd\u6709\u4f20\u7edf 4GL\u517c\u5bb9\u6027\uff0cFourJs\u56e2\u961f\u627e\u51fa\u8fd9\u6837\u7684\u65b9\u5f0f\u8fdb\u884c\u5bf9\u8c61\u5316\u7684\u64cd\u4f5c\u3002\u63a5\u4e0b\u6765\u8fd8\u6709\u66f4\u591a\u7684\u65b0\u53d8\u5316\uff0c\u518d\u8bf7\u5404\u4f4d\u671f\u5f85\u3002<\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"https:\/\/www.hefeiyu.com\">\u8d6b\u975e\u57df<\/a> &raquo; <a href=\"https:\/\/www.hefeiyu.com\/?p=8492\">[day22]TYPE\/FUNCTION\/INTERFACE\u8ba9FGL\u66f4\u8d34\u8fd1\u5bf9\u8c61\u8bed\u8a00<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6765\u81ea\uff1aiT \u90a6\u5e6b\u5fd9::\u4e00\u8d77\u5e6b\u5fd9\u89e3\u6c7a\u96e3\u984c\uff0c\u62ef\u6551 IT \u4eba\u7684\u4e00\u5929 (ithome.com.tw) [day22]TYPE\/FUNCTION\/INTERFACE\u8ba9FGL\u66f4\u8d34\u8fd1\u5bf9\u8c61\u8bed\u8a00 TYPE \u5b9a\u4e49\u57fa\u672c\u6216\u7ed3\u6784\u5316\u6570\u636e\u7c7b\u578b \u4ece Genero 2.50\u5f00\u59cb\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[490,26],"tags":[143,95,763],"class_list":["post-8492","post","type-post","status-publish","format-standard","hentry","category-490","category-4gl","tag-end","tag-record","tag-type"],"_links":{"self":[{"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=\/wp\/v2\/posts\/8492","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8492"}],"version-history":[{"count":2,"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=\/wp\/v2\/posts\/8492\/revisions"}],"predecessor-version":[{"id":8525,"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=\/wp\/v2\/posts\/8492\/revisions\/8525"}],"wp:attachment":[{"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hefeiyu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}