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#------------------------------------------------------------------------------
# Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# Sets the environment used by most Python cx_Oracle samples. Production
# applications should consider using External Authentication to
# avoid hard coded credentials.
#
# You can set values in environment variables to bypass the sample requesting
# the information it requires.
#
# CX_ORACLE_SAMPLES_MAIN_USER: user used for most samples
# CX_ORACLE_SAMPLES_MAIN_PASSWORD: password of user used for most samples
# CX_ORACLE_SAMPLES_EDITION_USER: user for editioning
# CX_ORACLE_SAMPLES_EDITION_PASSWORD: password of user for editioning
# CX_ORACLE_SAMPLES_EDITION_NAME: name of edition for editioning
# CX_ORACLE_SAMPLES_CONNECT_STRING: connect string
# CX_ORACLE_SAMPLES_SYSDBA_USER: SYSDBA user for setting up samples
# CX_ORACLE_SAMPLES_SYSDBA_PASSWORD: SYSDBA password for setting up samples
#
# CX_ORACLE_SAMPLES_CONNECT_STRING can be set to an Easy Connect string, or a
# Net Service Name from a tnsnames.ora file or external naming service,
# or it can be the name of a local Oracle database instance.
#
# If cx_Oracle is using Instant Client, then an Easy Connect string is
# generally appropriate. The syntax is:
#
# [//]host_name[:port][/service_name][:server_type][/instance_name]
#
# Commonly just the host_name and service_name are needed
# e.g. "localhost/orclpdb1" or "localhost/XEPDB1"
#
# If using a tnsnames.ora file, the file can be in a default
# location such as $ORACLE_HOME/network/admin/tnsnames.ora or
# /etc/tnsnames.ora. Alternatively set the TNS_ADMIN environment
# variable and put the file in $TNS_ADMIN/tnsnames.ora.
#------------------------------------------------------------------------------
from __future__ import print_function
import getpass
import os
import sys
# for Python 2.7 we need raw_input
try:
input = raw_input
except NameError:
pass
# default values
DEFAULT_MAIN_USER = "pythondemo"
DEFAULT_EDITION_USER = "pythoneditions"
DEFAULT_EDITION_NAME = "python_e1"
DEFAULT_CONNECT_STRING = "localhost/orclpdb1"
# dictionary containing all parameters; these are acquired as needed by the
# methods below (which should be used instead of consulting this dictionary
# directly) and then stored so that a value is not requested more than once
PARAMETERS = {}
def GetValue(name, label, defaultValue=""):
value = PARAMETERS.get(name)
if value is not None:
return value
envName = "CX_ORACLE_SAMPLES_" + name
value = os.environ.get(envName)
if value is None:
if defaultValue:
label += " [%s]" % defaultValue
label += ": "
if defaultValue:
value = input(label).strip()
else:
value = getpass.getpass(label)
if not value:
value = defaultValue
PARAMETERS[name] = value
return value
def GetMainUser():
return GetValue("MAIN_USER", "Main User Name", DEFAULT_MAIN_USER)
def GetMainPassword():
return GetValue("MAIN_PASSWORD", "Password for %s" % GetMainUser())
def GetEditionUser():
return GetValue("EDITION_USER", "Edition User Name", DEFAULT_EDITION_USER)
def GetEditionPassword():
return GetValue("EDITION_PASSWORD", "Password for %s" % GetEditionUser())
def GetEditionName():
return GetValue("EDITION_NAME", "Edition Name", DEFAULT_EDITION_NAME)
def GetConnectString():
return GetValue("CONNECT_STRING", "Connect String", DEFAULT_CONNECT_STRING)
def GetMainConnectString(password=None):
if password is None:
password = GetMainPassword()
return "%s/%s@%s" % (GetMainUser(), password, GetConnectString())
def GetDrcpConnectString():
return GetMainConnectString() + ":pooled"
def GetEditionConnectString():
return "%s/%s@%s" % \
(GetEditionUser(), GetEditionPassword(), GetConnectString())
def GetSysdbaConnectString():
sysdbaUser = GetValue("SYSDBA_USER", "SYSDBA user", "sys")
sysdbaPassword = GetValue("SYSDBA_PASSWORD",
"Password for %s" % sysdbaUser)
return "%s/%s@%s" % (sysdbaUser, sysdbaPassword, GetConnectString())
def RunSqlScript(conn, scriptName, **kwargs):
statementParts = []
cursor = conn.cursor()
replaceValues = [("&" + k + ".", v) for k, v in kwargs.items()] + \
[("&" + k, v) for k, v in kwargs.items()]
scriptDir = os.path.dirname(os.path.abspath(sys.argv[0]))
fileName = os.path.join(scriptDir, "sql", scriptName + "Exec.sql")
for line in open(fileName):
if line.strip() == "/":
statement = "".join(statementParts).strip()
if statement:
for searchValue, replaceValue in replaceValues:
statement = statement.replace(searchValue, replaceValue)
cursor.execute(statement)
statementParts = []
else:
statementParts.append(line)
cursor.execute("""
select name, type, line, position, text
from dba_errors
where owner = upper(:owner)
order by name, type, line, position""",
owner = GetMainUser())
prevName = prevObjType = None
for name, objType, lineNum, position, text in cursor:
if name != prevName or objType != prevObjType:
print("%s (%s)" % (name, objType))
prevName = name
prevObjType = objType
print(" %s/%s %s" % (lineNum, position, text))
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