{"id":17,"date":"2007-06-11T22:28:44","date_gmt":"2007-06-11T22:28:44","guid":{"rendered":"https:\/\/www.wapshere.com\/missmiis\/?p=17"},"modified":"2023-01-16T08:10:06","modified_gmt":"2023-01-16T08:10:06","slug":"delta-and-multivalued-combined","status":"publish","type":"post","link":"https:\/\/www.wapshere.com\/missmiis\/delta-and-multivalued-combined","title":{"rendered":"Delta and Multivalued Combined"},"content":{"rendered":"<p><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">I&#8217;ve already covered <a href=\"https:\/\/www.wapshere.com\/missmiis\/?p=9\">how to create a multivalue table for SQL MAs<\/a>; and I&#8217;ve also talked about <a href=\"https:\/\/www.wapshere.com\/missmiis\/?p=12\">generating Delta tables for single-valued attributes<\/a>. If you are doing multivalue imports from SQL you are <em>really<\/em> going to want to get Delta imports working there too &#8211; those babies can be <em>sllloooowww<\/em>.<\/span><\/span><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">\u00a0<\/span><\/span><span lang=\"EN-GB\"><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">We need two tables for multivalue imports, which I am referring to as the Objects and the Values tables. The thing to understand is that the Delta table is based the Objects table only. You tell MIIS which lines have changed in the Objects table, but you still give it the entire Values table for cross-referencing. <\/span><\/span><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">\u00a0<\/span><\/span><\/span><span lang=\"EN-GB\"><span lang=\"EN-GB\"><br \/>\n<\/span><\/span><\/p>\n<p><span lang=\"EN-GB\"> <span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\"><img decoding=\"async\" src=\"https:\/\/www.wapshere.com\/images\/ma-multidelta-connectdb.GIF\" \/>\u00c2\u00a0<\/span><\/span><\/span><\/p>\n<p><span lang=\"EN-GB\"><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">When creating the Delta table follow the same method as <a href=\"https:\/\/www.wapshere.com\/missmiis\/?p=12\">explained before<\/a> &#8211; create a table with the same design as the Objects table, and then add an extra &#8220;ChangeType&#8221; column, which will contain &#8220;Add&#8221;, &#8220;Delete&#8221; or &#8220;Modify&#8221;.<\/span><\/span><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">\u00a0<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin: 0cm 0cm 0pt;\"><span lang=\"EN-GB\"><span style=\"font-family: Times New Roman;\">If you&#8217;re only importing one multivalued attribute, or if you don&#8217;t have a lot of data, you can stop here. Chances are that you have a number though, or you have combined multi- and single-valued attributes in one table, and for that you&#8217;re going to need <a href=\"https:\/\/www.wapshere.com\/missmiis\/?p=18\">Attribute-level imports<\/a>.<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;ve already covered how to create a multivalue table for SQL MAs; and I&#8217;ve also talked about generating Delta tables for single-valued attributes. If you are doing multivalue imports from SQL you are really going to want to get Delta imports working there too &#8211; those babies can be sllloooowww.\u00a0We need two tables for multivalue&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":[]},"categories":[34,28,5],"tags":[],"class_list":["post-17","post","type-post","status-publish","format-standard","hentry","category-ilm2007","category-miis2003","category-sql"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pkp1o-h","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/posts\/17","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/comments?post=17"}],"version-history":[{"count":4,"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/posts\/17\/revisions"}],"predecessor-version":[{"id":3350,"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/posts\/17\/revisions\/3350"}],"wp:attachment":[{"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/media?parent=17"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/categories?post=17"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wapshere.com\/missmiis\/wp-json\/wp\/v2\/tags?post=17"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}