diff --git a/htdocs/admin/accountant.php b/htdocs/admin/accountant.php
index aa60a5f7def..e2168f45de4 100644
--- a/htdocs/admin/accountant.php
+++ b/htdocs/admin/accountant.php
@@ -50,6 +50,8 @@ if (!$user->admin) {
 
 $error = 0;
 
+$object = new stdClass();
+
 
 /*
  * Actions
diff --git a/htdocs/admin/system/database-tables.php b/htdocs/admin/system/database-tables.php
index 5742cd16e29..44019b61de2 100644
--- a/htdocs/admin/system/database-tables.php
+++ b/htdocs/admin/system/database-tables.php
@@ -57,9 +57,13 @@ $action = GETPOST('action', 'aZ09');
  * Actions
  */
 
+$sqllog = '';
+$resultsql = true;
+
 if ($action == 'convert') {	// Convert engine into innodb
 	$sql = "ALTER TABLE ".$db->sanitize($table)." ENGINE=INNODB";
-	$db->query($sql);
+	$sqllog .= $sql.'<br>';
+	$resultsql = $db->query($sql);
 }
 if ($action == 'convertutf8') {
 	$collation = 'utf8_unicode_ci';
@@ -68,14 +72,18 @@ if ($action == 'convertutf8') {
 		$collation = 'utf8_general_ci';
 	}
 	$sql = "ALTER TABLE ".$db->sanitize($table)." CHARACTER SET utf8 COLLATE ".$db->sanitize($collation);	// Set the default value on table
+	$sqllog .= $sql.'<br>';
 	$resql1 = $db->query($sql);
 	if (!$resql1) {
 		setEventMessages($db->lasterror(), null, 'warnings');
+		$resultsql = $resql1;
 	} else {
 		$sql = "ALTER TABLE ".$db->sanitize($table)." CONVERT TO CHARACTER SET utf8 COLLATE ".$db->sanitize($collation);	// Switch fields (may fails due to foreign key)
+		$sqllog .= $sql.'<br>';
 		$resql2 = $db->query($sql);
 		if (!$resql2) {
 			setEventMessages($db->lasterror(), null, 'warnings');
+			$resultsql = $resql2;
 		}
 	}
 }
@@ -86,20 +94,25 @@ if ($action == 'convertutf8mb4') {
 		$collation = 'utf8mb4_general_ci';
 	}
 	$sql = "ALTER TABLE ".$db->sanitize($table)." CHARACTER SET utf8mb4 COLLATE ".$db->sanitize($collation);	// Set the default value on table
+	$sqllog .= $sql.'<br>';
 	$resql1 = $db->query($sql);
 	if (!$resql1) {
 		setEventMessages($db->lasterror(), null, 'warnings');
+		$resultsql = $resql1;
 	} else {
 		$sql = "ALTER TABLE ".$db->sanitize($table)." CONVERT TO CHARACTER SET utf8mb4 COLLATE ".$db->sanitize($collation);	// Switch fields (may fails due to foreign key)
+		$sqllog .= $sql.'<br>';
 		$resql2 = $db->query($sql);
 		if (!$resql2) {
 			setEventMessages($db->lasterror(), null, 'warnings');
+			$resultsql = $resql2;
 		}
 	}
 }
 if ($action == 'convertdynamic') {
 	$sql = "ALTER TABLE ".$db->sanitize($table)." ROW_FORMAT=DYNAMIC;";
-	$db->query($sql);
+	$sqllog .= $sql.'<br>';
+	$resultsql = $db->query($sql);
 }
 
 
@@ -109,8 +122,13 @@ if ($action == 'convertdynamic') {
 
 llxHeader('', '', '', '', 0, 0, '', '', '', 'mod-admin page-database_tables');
 
-print load_fiche_titre($langs->trans("Tables")." ".ucfirst($conf->db->type), '', 'title_setup');
+$linkback = '<a href="'.DOL_URL_ROOT.'/admin/system/database.php?restore_lastsearch_values=1">'.img_picto($langs->trans("Back"), 'back', 'class="pictofixedwidth"').'<span class="hideonsmartphone">'.$langs->trans("Back").'</span></a>';
 
+print load_fiche_titre($langs->trans("Tables")." ".ucfirst($conf->db->type), $linkback, 'title_setup');
+
+if ($sqllog) {
+	print info_admin($sqllog.' '.(empty($resultsql) ? ' => KO '.$db->lasterror() : ' => OK'));
+}
 
 // Define request to get table description
 $base = 0;
@@ -216,10 +234,10 @@ if (!$base) {
 				if (isset($obj->Collation)) {
 					print '<br><span class="opacitymedium small">'.$langs->trans("ConvertInto");
 					if (!in_array($obj->Collation, array("utf8_unicode_ci"))) {
-						print ' <a class="reposition" href="database-tables.php?action=convertutf8&table='.urlencode($obj->Name).'&token='.newToken().'">utf8</a>';
+						print ' <a class="reposition" href="database-tables.php?action=convertutf8&table='.urlencode($obj->Name).'&token='.newToken().'" title="Charset utf8 + Collation utf8_unicode_ci">utf8</a>';
 					}
 					if (!in_array($obj->Collation, array("utf8mb4_unicode_ci"))) {
-						print ' <a class="reposition" href="database-tables.php?action=convertutf8mb4&table='.urlencode($obj->Name).'&token='.newToken().'">utf8mb4</a>';
+						print ' <a class="reposition" href="database-tables.php?action=convertutf8mb4&table='.urlencode($obj->Name).'&token='.newToken().'" title="Charset utf8mb4 + Collation utf8mb4_unicode_ci">utf8mb4</a>';
 					}
 					print '</span>';
 				}
diff --git a/htdocs/admin/system/database.php b/htdocs/admin/system/database.php
index 40e6b6c68f1..4d12a2b4005 100644
--- a/htdocs/admin/system/database.php
+++ b/htdocs/admin/system/database.php
@@ -53,21 +53,28 @@ if (!$user->admin) {
  * Actions
  */
 
+$sqllog = '';
+$resultsql = null;
+
 if ($action == 'convertutf8unicode') {			// Test on permission already done.
 	$sql = "ALTER DATABASE ".$db->sanitize($db->database_name)." CHARACTER SET utf8 COLLATE utf8_unicode_ci";
-	$db->query($sql);
+	$sqllog .= $sql.'<br>';
+	$resultsql = $db->query($sql);
 }
 if ($action == 'convertutf8mb4unicode') {		// Test on permission already done.
-	$sql = "ALTER DATABASE CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci";
-	$db->query($sql);
+	$sql = "ALTER DATABASE ".$db->sanitize($db->database_name)." CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci";
+	$sqllog .= $sql.'<br>';
+	$resultsql = $db->query($sql);
 }
 if ($action == 'convertutf8general') {			// Test on permission already done.
 	$sql = "ALTER DATABASE ".$db->sanitize($db->database_name)." CHARACTER SET utf8 COLLATE utf8_general_ci";
-	$db->query($sql);
+	$sqllog .= $sql.'<br>';
+	$resultsql = $db->query($sql);
 }
 if ($action == 'convertutf8mb4general') {		// Test on permission already done.
 	$sql = "ALTER DATABASE ".$db->sanitize($db->database_name)." CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci";
-	$db->query($sql);
+	$sqllog .= $sql.'<br>';
+	$resultsql = $db->query($sql);
 }
 
 
@@ -81,6 +88,10 @@ llxHeader('', '', '', '', 0, 0, '', '', '', 'mod-admin page-system_database');
 
 print load_fiche_titre($langs->trans("InfoDatabase"), '', 'title_setup');
 
+if ($sqllog) {
+	print info_admin($sqllog.' '.(empty($resultsql) ? ' => KO '.$db->lasterror() : ' => OK'));
+}
+
 // Database
 print '<div class="div-table-responsive-no-min">';
 print '<table class="noborder centpercent">';
@@ -96,7 +107,7 @@ print '<tr class="oddeven"><td width="300">'.$langs->trans("Password").'</td><td
 print '<tr class="oddeven"><td width="300">'.$langs->trans("DBStoringCharset").'</td><td>'.$db->getDefaultCharacterSetDatabase();
 if ($db->type == 'mysqli') {
 	$tooltipexample = "<br>SHOW VARIABLES LIKE 'character_set_database' (cached)<br>You can avoid cache effect with:<br>SELECT DEFAULT_CHARACTER_SET_NAME FROM information_schema.SCHEMATA WHERE SCHEMA_NAME = '".$db->escape($conf->db->name)."'";
-	print ' '.$form->textwithpicto('', $langs->transnoentitiesnoconv("HelpMariaDBToGetValue", $tooltipexample.'<br>'.$langs->transnoentitiesnoconv("HelpMariaDBToGetPossibleValues", "<br>SHOW CHARSET")."<br><br>Example to change value: ALTER DATABASE ".$conf->db->name." CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"));
+	print ' '.$form->textwithpicto('', $langs->transnoentitiesnoconv("HelpMariaDBToGetValue", $tooltipexample.'<br>'.$langs->transnoentitiesnoconv("HelpMariaDBToGetPossibleValues", "<br>SHOW CHARSET")."<br><br>Example to change value: ALTER DATABASE ".$conf->db->name." CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;"), 1, 'help', 'valignmiddle', 0, 3, 'tooltipcharset');
 	// We can use $db->getDefaultCharacterSetDatabase(),  $db->getListOfCharacterSet(),
 }
 print '</td></tr>'."\n";
@@ -109,7 +120,7 @@ if ($db->type == 'mysqli') {
 		print img_warning('The database default value of collation '.$defaultcollation.' differs from conf setup '.$conf->db->dolibarr_main_db_collation);
 	}
 	$tooltipexample = "<br>SHOW VARIABLES LIKE 'collation_database' (cached)<br>You can avoid cache effect with:<br>SELECT DEFAULT_COLLATION_NAME FROM information_schema.SCHEMATA WHERE SCHEMA_NAME = '".$db->escape($conf->db->name)."'";
-	print ' '.$form->textwithpicto('', $langs->transnoentitiesnoconv("HelpMariaDBToGetValue", $tooltipexample.'<br>'.$langs->transnoentitiesnoconv("HelpMariaDBToGetPossibleValues", "<br>SHOW COLLATION")."<br><br>Example to change value: ALTER DATABASE ".$conf->db->name." CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"));
+	print ' '.$form->textwithpicto('', $langs->transnoentitiesnoconv("HelpMariaDBToGetValue", $tooltipexample.'<br>'.$langs->transnoentitiesnoconv("HelpMariaDBToGetPossibleValues", "<br>SHOW COLLATION")."<br><br>Example to change value: ALTER DATABASE ".$conf->db->name." CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;"), 1, 'help', 'valignmiddle', 0, 3, 'tooltipcollation');
 	// We can use $db->getDefaultCollationDatabase(), $db->getListOfCollation();
 
 	print ' &nbsp; &nbsp; &nbsp; <span class="opacitymedium small">'.$langs->trans("ConvertInto");
diff --git a/htdocs/admin/system/dbtable.php b/htdocs/admin/system/dbtable.php
index 73907196dff..e3262724636 100644
--- a/htdocs/admin/system/dbtable.php
+++ b/htdocs/admin/system/dbtable.php
@@ -52,8 +52,13 @@ $action = GETPOST('action', 'aZ09');
  * Actions
  */
 
+
+$sqllog = '';
+$resultsql = true;
+
 if ($action == 'convertutf8') {
 	$sql = "SHOW FULL COLUMNS IN ".$db->sanitize($table);
+	$sqllog .= $sql.'<br>';
 
 	$resql = $db->query($sql);
 	if ($resql) {
@@ -63,6 +68,8 @@ if ($action == 'convertutf8') {
 			$row = $db->fetch_row($resql);
 			if ($row[0] == $field) {
 				$sql = "ALTER TABLE ".$db->sanitize($table)." MODIFY ".$db->sanitize($row[0])." ".$row[1]." CHARACTER SET utf8";		// We must not sanitize the $row[1]
+				$sqllog .= $sql.'<br>';
+
 				$db->query($sql);
 
 				$collation = 'utf8_unicode_ci';
@@ -72,6 +79,8 @@ if ($action == 'convertutf8') {
 				}
 
 				$sql = "ALTER TABLE ".$db->sanitize($table)." MODIFY ".$db->sanitize($row[0])." ".$row[1]." COLLATE ".$db->sanitize($collation);	// We must not sanitize the $row[1]
+				$sqllog .= $sql.'<br>';
+
 				$resql2 = $db->query($sql);
 				if (!$resql2) {
 					setEventMessages($db->lasterror(), null, 'warnings');
@@ -84,6 +93,7 @@ if ($action == 'convertutf8') {
 }
 if ($action == 'convertutf8mb4') {
 	$sql = "SHOW FULL COLUMNS IN ".$db->sanitize($table);
+	$sqllog .= $sql.'<br>';
 
 	$resql = $db->query($sql);
 	if ($resql) {
@@ -93,6 +103,8 @@ if ($action == 'convertutf8mb4') {
 			$row = $db->fetch_row($resql);
 			if ($row[0] == $field) {
 				$sql = "ALTER TABLE ".$db->sanitize($table)." MODIFY ".$db->sanitize($row[0])." ".$row[1]." CHARACTER SET utf8mb4";		// We must not sanitize the $row[1]
+				$sqllog .= $sql.'<br>';
+
 				$db->query($sql);
 
 				$collation = 'utf8mb4_unicode_ci';
@@ -102,6 +114,8 @@ if ($action == 'convertutf8mb4') {
 				}
 
 				$sql = "ALTER TABLE ".$db->sanitize($table)." MODIFY ".$db->sanitize($row[0])." ".$row[1]." COLLATE ".$db->sanitize($collation);	// We must not sanitize the $row[1]
+				$sqllog .= $sql.'<br>';
+
 				$resql2 = $db->query($sql);
 				if (!$resql2) {
 					setEventMessages($db->lasterror(), null, 'warnings');
@@ -120,8 +134,13 @@ if ($action == 'convertutf8mb4') {
 
 llxHeader('', '', '', '', 0, 0, '', '', '', 'mod-admin page-system_dbtable');
 
+$linkback = '<a href="'.DOL_URL_ROOT.'/admin/system/database-tables.php?restore_lastsearch_values=1">'.img_picto($langs->trans("Back"), 'back', 'class="pictofixedwidth"').'<span class="hideonsmartphone">'.$langs->trans("Back").'</span></a>';
 
-print load_fiche_titre($langs->trans("Table")." ".$table, '', 'title_setup');
+print load_fiche_titre($langs->trans("Table")." ".$table, $linkback, 'title_setup');
+
+if ($sqllog) {
+	print info_admin($sqllog.' '.(empty($resultsql) ? ' => KO '.$db->lasterror() : ' => OK'));
+}
 
 // Define request to get table description
 $base = 0;