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#------------------------------------------------------------------------------
# Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# bind_insert.py
#
# Demonstrate how to insert a row into a table using bind variables.
#------------------------------------------------------------------------------
import cx_Oracle as oracledb
import sample_env
connection = oracledb.connect(sample_env.get_main_connect_string())
#------------------------------------------------------------------------------
# "Bind by position"
#------------------------------------------------------------------------------
rows = [
(1, "First"),
(2, "Second"),
(3, "Third"),
(4, "Fourth"),
(5, None), # Insert a NULL value
(6, "Sixth"),
(7, "Seventh")
]
cursor = connection.cursor()
# predefine maximum string size to avoid data scans and memory reallocations;
# the None value indicates that the default processing can take place
cursor.setinputsizes(None, 20)
cursor.executemany("insert into mytab(id, data) values (:1, :2)", rows)
#------------------------------------------------------------------------------
# "Bind by name"
#------------------------------------------------------------------------------
rows = [
{"d": "Eighth", "i": 8},
{"d": "Ninth", "i": 9},
{"d": "Tenth", "i": 10}
]
cursor = connection.cursor()
# Predefine maximum string size to avoid data scans and memory reallocations
cursor.setinputsizes(d=20)
cursor.executemany("insert into mytab(id, data) values (:i, :d)", rows)
#------------------------------------------------------------------------------
# Inserting a single bind still needs tuples
#------------------------------------------------------------------------------
rows = [
("Eleventh",),
("Twelth",)
]
cursor = connection.cursor()
cursor.executemany("insert into mytab(id, data) values (11, :1)", rows)
#------------------------------------------------------------------------------
# Now query the results back
#------------------------------------------------------------------------------
# Don't commit - this lets the demo be run multiple times
#connection.commit()
for row in cursor.execute('select * from mytab'):
print(row)
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