Bug #1805 - Migration scripts: An index has been removed from the tables course_setting which prevents conversion of the same tables to UTF-8.

main/install/migrate-db-1.8.6.2-1.8.7-pre.sql

@@ -19,7 +19,7 @@ ALTER TABLE session_rel_user ADD COLUMN relation_type int NOT NULL default 0;
 ALTER TABLE course_rel_user  ADD COLUMN relation_type int NOT NULL default 0;
 
 INSERT INTO settings_current (variable, subkey, type, category, selected_value, title, comment, scope, subkeytext, access_url, access_url_changeable) VALUES ('course_create_active_tools','notebook','checkbox','Tools','true','CourseCreateActiveToolsTitle','CourseCreateActiveToolsComment',NULL,'Notebook',1,0);
-ALTER TABLE course DROP PRIMARY KEY , ADD UNIQUE KEY code (code); 
+ALTER TABLE course DROP PRIMARY KEY , ADD UNIQUE KEY code (code);
 ALTER TABLE course ADD id int NOT NULL auto_increment PRIMARY KEY FIRST;
 CREATE TABLE block (id INT NOT NULL auto_increment, name VARCHAR(255) NULL, description TEXT NULL, path VARCHAR(255) NOT NULL, controller VARCHAR(100) NOT NULL, active TINYINT NOT NULL default 1, PRIMARY KEY(id));
 ALTER TABLE block ADD UNIQUE(path);
@@ -94,7 +94,7 @@ ALTER TABLE gradebook_score_display ADD score_color_percent float unsigned NOT N
 CREATE TABLE track_e_item_property(id int NOT NULL auto_increment PRIMARY KEY, course_id int NOT NULL, item_property_id int NOT NULL, title varchar(255), content text, progress int NOT NULL default 0, lastedit_date datetime NOT NULL default '0000-00-00 00:00:00', lastedit_user_id int  NOT NULL, session_id int NOT NULL default 0);
 ALTER TABLE track_e_item_property ADD INDEX (course_id, item_property_id, session_id);
 ALTER TABLE track_e_access ADD access_session_id INT NOT NULL DEFAULT 0;
-ALTER TABLE track_e_access ADD INDEX (access_session_id);  
+ALTER TABLE track_e_access ADD INDEX (access_session_id);
 ALTER TABLE track_e_course_access ADD session_id INT NOT NULL DEFAULT 0;
 ALTER TABLE track_e_course_access ADD INDEX (session_id);
 ALTER TABLE track_e_downloads ADD down_session_id INT NOT NULL DEFAULT 0;
@@ -134,9 +134,9 @@ ALTER TABLE lp_view ADD INDEX(session_id);
 INSERT INTO course_setting (variable,value,category) VALUES ('allow_user_view_user_list',1,'user');
 ALTER TABLE tool_intro ADD COLUMN session_id INT  NOT NULL DEFAULT 0 AFTER intro_text, DROP PRIMARY KEY, ADD PRIMARY KEY  USING BTREE(id, session_id);
 CREATE TABLE thematic (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, title VARCHAR( 255 ) NOT NULL, content TEXT NULL, display_order int unsigned not null default 0, active TINYINT NOT NULL default 0, session_id INT NOT NULL DEFAULT 0);
-ALTER TABLE thematic ADD INDEX (active, session_id);  
-CREATE TABLE thematic_plan (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, thematic_id INT NOT NULL, title VARCHAR(255) NOT NULL, description TEXT NULL, description_type INT NOT NULL); 
-ALTER TABLE thematic_plan ADD INDEX (thematic_id, description_type); 
+ALTER TABLE thematic ADD INDEX (active, session_id);
+CREATE TABLE thematic_plan (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, thematic_id INT NOT NULL, title VARCHAR(255) NOT NULL, description TEXT NULL, description_type INT NOT NULL);
+ALTER TABLE thematic_plan ADD INDEX (thematic_id, description_type);
 CREATE TABLE thematic_advance (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, thematic_id INT NOT NULL, attendance_id INT NOT NULL DEFAULT 0, content TEXT NOT NULL, start_date DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00', duration INT NOT NULL DEFAULT 0, done_advance tinyint NOT NULL DEFAULT 0);
 ALTER TABLE thematic_advance ADD INDEX (thematic_id);
 INSERT INTO course_setting (variable,value,category) VALUES ('display_info_advance_inside_homecourse',1,'thematic_advance');
@@ -145,3 +145,6 @@ ALTER TABLE lp ADD prerequisite int unsigned NOT NULL DEFAULT 0;
 ALTER TABLE student_publication MODIFY COLUMN description TEXT DEFAULT NULL;
 ALTER TABLE student_publication ADD COLUMN user_id INTEGER  NOT NULL AFTER session_id;
 INSERT INTO course_setting(variable,value,category) VALUES ('email_alert_students_on_new_homework',0,'work');
+-- See task #1805. The index unique_setting might not exist, in this case a harmless error message would appear in the log.
+ALTER TABLE course_setting DROP INDEX unique_setting;
+--