def classify_query(self):
stat = (self.query).split("|");
self.operation = stat[0]
if(self.operation=="select"):
print(stat)
q1=Semantic(stat,"select")
check=q1.select_tree()
if check == True:
tblnames=q1.returnTblname()
targetPrint=q1.returnTargetPrint()
join_clause=q1.returnJoinClause()
where_operation=q1.returnWhere()
query1 = Select(stat,self.database,targetPrint,tblnames,join_clause,where_operation)
query1.make_select()
else:
return False
if(self.operation=="update"):
print(stat)
q1=Semantic(stat,"update")
check=q1.select_tree()
if check == True:
targetColumns=q1.returnColumns()
newValues=q1.returnNewValues()
tblnames=q1.returnTblname()
where_operation=q1.returnWhere()
query1 = Update(stat,self.database,targetColumns,tblnames,newValues,where_operation)
self.database=query1.perform_update()
if(self.operation=="delete"):
q1=Semantic(stat,"delete")
check=q1.select_tree()
if check==True:
tblname = q1.returnTblname()
where_operation=q1.returnWhere()
query1=Delete(stat,self.database,tblname,where_operation)
self.database=query1.perform_delete()