Stored function for removing from group

db/stored/functions.sql

@@ -767,6 +767,26 @@ BEGIN
     RETURN ROW_COUNT()-1;
 END //
 
+DROP FUNCTION IF EXISTS RemoveFromGroupInSemester//
+CREATE FUNCTION `RemoveFromGroupInSemester` (
+        `pStudentID` INT,
+        `pGroupID` INT,
+        `pSemesterID` INT
+    ) RETURNS int(11)
+    NO SQL
+BEGIN
+    DECLARE vChecker INT DEFAULT 0;
+    DECLARE EXIT HANDLER FOR SQLEXCEPTION RETURN -1;
+
+    DELETE FROM `students_groups`
+        WHERE   students_groups.GroupID = pGroupID
+                and students_groups.StudentID = pStudentID
+                and students_groups.SemesterID = pSemesterID
+                and students_groups.State = 'common'
+        LIMIT 1;
+    RETURN ROW_COUNT()-1;
+END //
+
 
 # -------------------------------------------------------------------------------------------
 # Label: disciplines