LPS-107922 Use 'distinct' to avoid retrieving thousands of duplicate articles

Author: jonathanmccann

modules/apps/knowledge-base/knowledge-base-service/src/main/java/com/liferay/knowledge/base/internal/upgrade/v2_0_2/UpgradeKBArticle.java

@@ -116,8 +116,8 @@ private boolean _renameConflictingKBArticleFriendlyURLs()
 
 		return _renameConflictingFriendlyURL(
 			StringBundler.concat(
-				"select kbArticle2.kbArticleId, kbArticle2.urlTitle from ",
-				"KBArticle kbArticle1 inner join KBArticle kbArticle2 on ",
+				"select distinct kbArticle2.kbArticleId, kbArticle2.urlTitle ",
+				"from KBArticle kbArticle1 inner join KBArticle kbArticle2 on ",
 				"kbArticle1.groupId = kbArticle2.groupId and ",
 				"kbArticle1.kbFolderId = kbArticle2.kbFolderId and ",
 				"kbArticle1.urlTitle = kbArticle2.urlTitle where ",
@@ -130,8 +130,8 @@ private boolean _renameConflictingKBFolderFriendlyURLs()
 
 		return _renameConflictingFriendlyURL(
 			StringBundler.concat(
-				"select kbArticle2.kbFolderId, kbArticle2.urlTitle from ",
-				"KBFolder kbArticle1 inner join KBFolder kbArticle2 on ",
+				"select distinct kbArticle2.kbFolderId, kbArticle2.urlTitle ",
+				"from KBFolder kbArticle1 inner join KBFolder kbArticle2 on ",
 				"kbArticle1.groupId = kbArticle2.groupId and ",
 				"kbArticle1.parentKBFolderId = kbArticle2.parentKBFolderId ",
 				"and kbArticle1.urlTitle = kbArticle2.urlTitle where ",