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#------------------------------------------------------------------------------
# query_scroll.py (Section 3.4)
#------------------------------------------------------------------------------

#------------------------------------------------------------------------------
# Copyright 2017, 2020, Oracle and/or its affiliates. All rights reserved.
#------------------------------------------------------------------------------

import cx_Oracle
import db_config

con = cx_Oracle.connect(db_config.user, db_config.pw, db_config.dsn)
cur = con.cursor(scrollable = True)

cur.execute("select * from dept order by deptno")

cur.scroll(2, mode = "absolute")  # go to second row
print(cur.fetchone())

cur.scroll(-1)                    # go back one row
print(cur.fetchone())

cur.scroll(1)  # go to next row
print(cur.fetchone())

cur.scroll(mode = "first")  # go to first row
print(cur.fetchone())