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How to use test_copy method in tempest

Best Python code snippet using tempest_python

copy_from.py

Source:copy_from.py

1# copy_from.py -- example about copy_from 2#3# Copyright (C) 2002 Tom Jenkins <tjenkins@devis.com>4# Copyright (C) 2005 Federico Di Gregorio <fog@initd.org>5#6# This program is free software; you can redistribute it and/or modify7# it under the terms of the GNU General Public License as published by the8# Free Software Foundation; either version 2, or (at your option) any later9# version.10#11# This program is distributed in the hope that it will be useful, but12# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY13# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License14# for more details.15#16## put in DSN your DSN string17DSN = 'dbname=test'18## don't modify anything below tis line (except for experimenting)19import sys20import os21import StringIO22import psycoev23if len(sys.argv) > 1:24    DSN = sys.argv[1]25print "Opening connection using dns:", DSN26conn = psycoev.connect(DSN)27print "Encoding for this connection is", conn.encoding28curs = conn.cursor()29try:30    curs.execute("CREATE TABLE test_copy (fld1 text, fld2 text, fld3 int4)")31except:32    conn.rollback()33    curs.execute("DROP TABLE test_copy")34    curs.execute("CREATE TABLE test_copy (fld1 text, fld2 text, fld3 int4)")35conn.commit()36# copy_from with default arguments, from open file37io = open('copy_from.txt', 'wr')38data = ['Tom\tJenkins\t37\n',39        'Madonna\t\\N\t45\n',40        'Federico\tDi Gregorio\t\\N\n']41io.writelines(data)42io.close()43io = open('copy_from.txt', 'r')44curs.copy_from(io, 'test_copy')45print "1) Copy %d records from file object " % len(data) + \46      "using defaults (sep: \\t and null = \\N)"47io.close()48curs.execute("SELECT * FROM test_copy")49rows = curs.fetchall()50print "   Select returned %d rows" % len(rows)51for r in rows:52    print "    %s %s\t%s" % (r[0], r[1], r[2])53curs.execute("delete from test_copy")54conn.commit()55# copy_from using custom separator, from open file56io = open('copy_from.txt', 'wr')57data = ['Tom:Jenkins:37\n',58        'Madonna:\N:45\n',59        'Federico:Di Gregorio:\N\n']60io.writelines(data)61io.close()62io = open('copy_from.txt', 'r')63curs.copy_from(io, 'test_copy', ':')64print "2) Copy %d records from file object using sep = :" % len(data)65io.close()66curs.execute("SELECT * FROM test_copy")67rows = curs.fetchall()68print "   Select returned %d rows" % len(rows)69for r in rows:70    print "    %s %s\t%s" % (r[0], r[1], r[2])71curs.execute("delete from test_copy")72conn.commit()73# copy_from using custom null identifier, from open file74io = open('copy_from.txt', 'wr')75data = ['Tom\tJenkins\t37\n',76        'Madonna\tNULL\t45\n',77        'Federico\tDi Gregorio\tNULL\n']78io.writelines(data)79io.close()80io = open('copy_from.txt', 'r')81curs.copy_from(io, 'test_copy', null='NULL')82print "3) Copy %d records from file object using null = NULL" % len(data)83io.close()84curs.execute("SELECT * FROM test_copy")85rows = curs.fetchall()86print "   Select using cursor returned %d rows" % len(rows)87for r in rows:88    print "    %s %s\t%s" % (r[0], r[1], r[2])89curs.execute("delete from test_copy")90conn.commit()91# copy_from using custom separator and null identifier92io = open('copy_from.txt', 'wr')93data = ['Tom:Jenkins:37\n', 'Madonna:NULL:45\n', 'Federico:Di Gregorio:NULL\n']94io.writelines(data)95io.close()96io = open('copy_from.txt', 'r')97curs.copy_from(io, 'test_copy', ':', 'NULL')98print "4) Copy %d records from file object " % len(data) + \99      "using sep = : and null = NULL"100io.close()101curs.execute("SELECT * FROM test_copy")102rows = curs.fetchall()103print "   Select using cursor returned %d rows" % len(rows)104for r in rows:105    print "    %s %s\t%s" % (r[0], r[1], r[2])106curs.execute("delete from test_copy")107conn.commit()108# anything can be used as a file if it has .read() and .readline() methods109data = StringIO.StringIO()110data.write('\n'.join(['Tom\tJenkins\t37',111                      'Madonna\t\N\t45',112                      'Federico\tDi Gregorio\t\N']))113data.seek(0)114curs.copy_from(data, 'test_copy')115print "5) Copy 3 records from StringIO object using defaults"116curs.execute("SELECT * FROM test_copy")117rows = curs.fetchall()118print "   Select using cursor returned %d rows" % len(rows)119for r in rows:120    print "    %s %s\t%s" % (r[0], r[1], r[2])121curs.execute("delete from test_copy")122conn.commit()123# simple error test124print "6) About to raise an error"125data = StringIO.StringIO()126data.write('\n'.join(['Tom\tJenkins\t37',127                      'Madonna\t\N\t45',128                      'Federico\tDi Gregorio\taaa']))129data.seek(0)130try:131    curs.copy_from(data, 'test_copy')132except StandardError, err:133    conn.rollback()134    print "   Catched error (as expected):\n", err135conn.rollback()136curs.execute("DROP TABLE test_copy")137os.unlink('copy_from.txt')...

copy_to.py

Source:copy_to.py

1# copy_to.py -- example about copy_to 2#3# Copyright (C) 2002 Tom Jenkins <tjenkins@devis.com>4# Copyright (C) 2005 Federico Di Gregorio <fog@initd.org>5#6# This program is free software; you can redistribute it and/or modify7# it under the terms of the GNU General Public License as published by the8# Free Software Foundation; either version 2, or (at your option) any later9# version.10#11# This program is distributed in the hope that it will be useful, but12# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY13# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License14# for more details.15#16## put in DSN your DSN string17DSN = 'dbname=test'18## don't modify anything below tis line (except for experimenting)19import sys20import os21import StringIO22import psycoev23if len(sys.argv) > 1:24    DSN = sys.argv[1]25print "Opening connection using dns:", DSN26conn = psycoev.connect(DSN)27print "Encoding for this connection is", conn.encoding28curs = conn.cursor()29try:30    curs.execute("CREATE TABLE test_copy (fld1 text, fld2 text, fld3 int4)")31except:32    conn.rollback()33    curs.execute("DROP TABLE test_copy")34    curs.execute("CREATE TABLE test_copy (fld1 text, fld2 text, fld3 int4)")35conn.commit()36# demostrate copy_to functionality37data = [('Tom', 'Jenkins', '37'),38        ('Madonna', None, '45'),39        ('Federico', 'Di Gregorio', None)]40query = "INSERT INTO test_copy VALUES (%s, %s, %s)"41curs.executemany(query, data)42conn.commit()43# copy_to using defaults44io = open('copy_to.txt', 'w')45curs.copy_to(io, 'test_copy')46print "1) Copy %d records into file object using defaults: " % len (data) + \47      "sep = \\t and null = \\N"48io.close()49rows = open('copy_to.txt', 'r').readlines()50print "   File has %d rows:" % len(rows)51for r in rows:52    print "   ", r,53# copy_to using custom separator54io = open('copy_to.txt', 'w')55curs.copy_to(io, 'test_copy', ':')56print "2) Copy %d records into file object using sep = :" % len(data)57io.close()58rows = open('copy_to.txt', 'r').readlines()59print "   File has %d rows:" % len(rows)60for r in rows:61    print "   ", r,62# copy_to using custom null identifier63io = open('copy_to.txt', 'w')64curs.copy_to(io, 'test_copy', null='NULL')65print "3) Copy %d records into file object using null = NULL" % len(data)66io.close()67rows = open('copy_to.txt', 'r').readlines()68print "   File has %d rows:" % len(rows)69for r in rows:70    print "   ", r,71# copy_to using custom separator and null identifier72io = open('copy_to.txt', 'w')73curs.copy_to(io, 'test_copy', ':', 'NULL')74print "4) Copy %d records into file object using sep = : and null ) NULL" % \75      len(data)76io.close()77rows = open('copy_to.txt', 'r').readlines()78print "   File has %d rows:" % len(rows)79for r in rows:80    print "   ", r,81curs.execute("DROP TABLE test_copy")82os.unlink('copy_to.txt')...

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