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cqlsh
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cqlsh
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#!/bin/sh
# -*- mode: Python -*-
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""":"
# bash code here; finds a suitable python interpreter and execs this file.
# prefer unqualified "python" if suitable:
python -c 'import sys; sys.exit(not (0x020500b0 < sys.hexversion < 0x03000000))' 2>/dev/null \
&& exec python "$0" "$@"
for pyver in 2.6 2.7 2.5; do
which python$pyver > /dev/null 2>&1 && exec python$pyver "$0" "$@"
done
echo "No appropriate python interpreter found." >&2
exit 1
":"""
from __future__ import with_statement
description = "CQL Shell for Apache Cassandra"
version = "4.0.1"
from StringIO import StringIO
from itertools import groupby
from contextlib import contextmanager, closing
from glob import glob
from uuid import UUID
import cmd
import sys
import os
import time
import optparse
import ConfigParser
import codecs
import locale
import platform
import warnings
import csv
readline = None
try:
# check if tty first, cause readline doesn't check, and only cares
# about $TERM. we don't want the funky escape code stuff to be
# output if not a tty.
if sys.stdin.isatty():
import readline
except ImportError:
pass
CQL_LIB_PREFIX = 'cql-internal-only-'
THRIFT_LIB_PREFIX = 'thrift-python-internal-only-'
# use bundled libs for python-cql and thrift, if available. if there
# is a ../lib dir, use bundled libs there preferentially.
ZIPLIB_DIRS = [os.path.join(os.path.dirname(__file__), '..', 'lib')]
myplatform = platform.system()
if myplatform == 'Linux':
ZIPLIB_DIRS.append('/usr/share/cassandra/lib')
if os.environ.get('CQLSH_NO_BUNDLED', ''):
ZIPLIB_DIRS = ()
def find_zip(libprefix):
for ziplibdir in ZIPLIB_DIRS:
zips = glob(os.path.join(ziplibdir, libprefix + '*.zip'))
if zips:
return max(zips) # probably the highest version, if multiple
cql_zip = find_zip(CQL_LIB_PREFIX)
if cql_zip:
ver = os.path.splitext(os.path.basename(cql_zip))[0][len(CQL_LIB_PREFIX):]
sys.path.insert(0, os.path.join(cql_zip, 'cql-' + ver))
thrift_zip = find_zip(THRIFT_LIB_PREFIX)
if thrift_zip:
sys.path.insert(0, thrift_zip)
try:
import cql
except ImportError, e:
sys.exit("\nPython CQL driver not installed, or not on PYTHONPATH.\n"
'You might try "easy_install cql".\n\n'
'Python: %s\n'
'Module load path: %r\n\n'
'Error: %s\n' % (sys.executable, sys.path, e))
import cql.decoders
from cql.cursor import _VOID_DESCRIPTION
from cql.cqltypes import (cql_types, cql_typename, lookup_casstype, lookup_cqltype,
CassandraType, ReversedType, CompositeType)
# cqlsh should run correctly when run out of a Cassandra source tree,
# out of an unpacked Cassandra tarball, and after a proper package install.
cqlshlibdir = os.path.join(os.path.dirname(os.path.realpath(__file__)), '..', 'pylib')
if os.path.isdir(cqlshlibdir):
sys.path.insert(0, cqlshlibdir)
from cqlshlib import cqlhandling, cql3handling, pylexotron
from cqlshlib.displaying import (RED, BLUE, ANSI_RESET, COLUMN_NAME_COLORS,
FormattedValue, colorme)
from cqlshlib.formatting import format_by_type
from cqlshlib.util import trim_if_present
from cqlshlib.tracing import print_trace_session
HISTORY_DIR = os.path.expanduser(os.path.join('~', '.cassandra'))
CONFIG_FILE = os.path.join(HISTORY_DIR, 'cqlshrc')
HISTORY = os.path.join(HISTORY_DIR, 'cqlsh_history')
if not os.path.exists(HISTORY_DIR):
os.mkdir(HISTORY_DIR)
OLD_CONFIG_FILE = os.path.expanduser(os.path.join('~', '.cqlshrc'))
if os.path.exists(OLD_CONFIG_FILE):
os.rename(OLD_CONFIG_FILE, CONFIG_FILE)
OLD_HISTORY = os.path.expanduser(os.path.join('~', '.cqlsh_history'))
if os.path.exists(OLD_HISTORY):
os.rename(OLD_HISTORY, HISTORY)
DEFAULT_HOST = 'localhost'
DEFAULT_PORT = 9160
DEFAULT_CQLVER = '3.1.1'
DEFAULT_TRANSPORT_FACTORY = 'cqlshlib.tfactory.regular_transport_factory'
DEFAULT_TIME_FORMAT = '%Y-%m-%d %H:%M:%S%z'
DEFAULT_FLOAT_PRECISION = 5
DEFAULT_SELECT_LIMIT = 10000
if readline is not None and readline.__doc__ is not None and 'libedit' in readline.__doc__:
DEFAULT_COMPLETEKEY = '\t'
else:
DEFAULT_COMPLETEKEY = 'tab'
epilog = """Connects to %(DEFAULT_HOST)s:%(DEFAULT_PORT)d by default. These
defaults can be changed by setting $CQLSH_HOST and/or $CQLSH_PORT. When a
host (and optional port number) are given on the command line, they take
precedence over any defaults.""" % globals()
parser = optparse.OptionParser(description=description, epilog=epilog,
usage="Usage: %prog [options] [host [port]]",
version='cqlsh ' + version)
parser.add_option("-C", "--color", action='store_true', dest='color',
help='Always use color output')
parser.add_option("--no-color", action='store_false', dest='color',
help='Never use color output')
parser.add_option("-u", "--username", help="Authenticate as user.")
parser.add_option("-p", "--password", help="Authenticate using password.")
parser.add_option('-k', '--keyspace', help='Authenticate to the given keyspace.')
parser.add_option("-f", "--file", help="Execute commands from FILE, then exit")
parser.add_option("-t", "--transport-factory",
help="Use the provided Thrift transport factory function.")
parser.add_option('--debug', action='store_true',
help='Show additional debugging information')
parser.add_option('--cqlversion', default=DEFAULT_CQLVER,
help='Specify a particular CQL version (default: %default).'
' Examples: "3.0.3", "3.1.0"')
CQL_ERRORS = (cql.Error,)
try:
from thrift.Thrift import TException
except ImportError:
pass
else:
CQL_ERRORS += (TException,)
debug_completion = bool(os.environ.get('CQLSH_DEBUG_COMPLETION', '') == 'YES')
SYSTEM_KEYSPACES = ('system', 'system_traces', 'system_auth')
# we want the cql parser to understand our cqlsh-specific commands too
my_commands_ending_with_newline = (
'help',
'?',
'consistency',
'describe',
'desc',
'show',
'source',
'capture',
'debug',
'tracing',
'expand',
'exit',
'quit'
)
cqlsh_syntax_completers = []
def cqlsh_syntax_completer(rulename, termname):
def registrator(f):
cqlsh_syntax_completers.append((rulename, termname, f))
return f
return registrator
cqlsh_extra_syntax_rules = r'''
<cqlshCommand> ::= <CQL_Statement>
| <specialCommand> ( ";" | "\n" )
;
<specialCommand> ::= <describeCommand>
| <consistencyCommand>
| <showCommand>
| <sourceCommand>
| <captureCommand>
| <copyCommand>
| <debugCommand>
| <helpCommand>
| <tracingCommand>
| <expandCommand>
| <exitCommand>
;
<describeCommand> ::= ( "DESCRIBE" | "DESC" )
( "KEYSPACES"
| "KEYSPACE" ksname=<keyspaceName>?
| ( "COLUMNFAMILY" | "TABLE" ) cf=<columnFamilyName>
| ( "COLUMNFAMILIES" | "TABLES" )
| "FULL"? "SCHEMA"
| "CLUSTER" )
;
<consistencyCommand> ::= "CONSISTENCY" ( level=<consistencyLevel> )?
;
<consistencyLevel> ::= "ANY"
| "ONE"
| "TWO"
| "THREE"
| "QUORUM"
| "ALL"
| "LOCAL_QUORUM"
| "EACH_QUORUM"
;
<showCommand> ::= "SHOW" what=( "VERSION" | "HOST" )
;
<sourceCommand> ::= "SOURCE" fname=<stringLiteral>
;
<captureCommand> ::= "CAPTURE" ( fname=( <stringLiteral> | "OFF" ) )?
;
<copyCommand> ::= "COPY" cf=<columnFamilyName>
( "(" [colnames]=<colname> ( "," [colnames]=<colname> )* ")" )?
( dir="FROM" ( fname=<stringLiteral> | "STDIN" )
| dir="TO" ( fname=<stringLiteral> | "STDOUT" ) )
( "WITH" <copyOption> ( "AND" <copyOption> )* )?
;
<copyOption> ::= [optnames]=<identifier> "=" [optvals]=<copyOptionVal>
;
<copyOptionVal> ::= <identifier>
| <stringLiteral>
;
# avoiding just "DEBUG" so that this rule doesn't get treated as a terminal
<debugCommand> ::= "DEBUG" "THINGS"?
;
<helpCommand> ::= ( "HELP" | "?" ) [topic]=( /[a-z_]*/ )*
;
<tracingCommand> ::= "TRACING" ( switch=( "ON" | "OFF" ) )?
;
<expandCommand> ::= "EXPAND" ( switch=( "ON" | "OFF" ) )?
;
<exitCommand> ::= "exit" | "quit"
;
<qmark> ::= "?" ;
'''
@cqlsh_syntax_completer('helpCommand', 'topic')
def complete_help(ctxt, cqlsh):
return sorted([ t.upper() for t in cqldocs.get_help_topics() + cqlsh.get_help_topics() ])
def complete_source_quoted_filename(ctxt, cqlsh):
partial = ctxt.get_binding('partial', '')
head, tail = os.path.split(partial)
exhead = os.path.expanduser(head)
try:
contents = os.listdir(exhead or '.')
except OSError:
return ()
matches = filter(lambda f: f.startswith(tail), contents)
annotated = []
for f in matches:
match = os.path.join(head, f)
if os.path.isdir(os.path.join(exhead, f)):
match += '/'
annotated.append(match)
return annotated
cqlsh_syntax_completer('sourceCommand', 'fname') \
(complete_source_quoted_filename)
cqlsh_syntax_completer('captureCommand', 'fname') \
(complete_source_quoted_filename)
@cqlsh_syntax_completer('copyCommand', 'fname')
def copy_fname_completer(ctxt, cqlsh):
lasttype = ctxt.get_binding('*LASTTYPE*')
if lasttype == 'unclosedString':
return complete_source_quoted_filename(ctxt, cqlsh)
partial = ctxt.get_binding('partial')
if partial == '':
return ["'"]
return ()
@cqlsh_syntax_completer('copyCommand', 'colnames')
def complete_copy_column_names(ctxt, cqlsh):
existcols = map(cqlsh.cql_unprotect_name, ctxt.get_binding('colnames', ()))
ks = cqlsh.cql_unprotect_name(ctxt.get_binding('ksname', None))
cf = cqlsh.cql_unprotect_name(ctxt.get_binding('cfname'))
colnames = cqlsh.get_column_names(ks, cf)
if len(existcols) == 0:
return [colnames[0]]
return set(colnames[1:]) - set(existcols)
COPY_OPTIONS = ('DELIMITER', 'QUOTE', 'ESCAPE', 'HEADER', 'ENCODING', 'NULL')
@cqlsh_syntax_completer('copyOption', 'optnames')
def complete_copy_options(ctxt, cqlsh):
optnames = map(str.upper, ctxt.get_binding('optnames', ()))
direction = ctxt.get_binding('dir').upper()
opts = set(COPY_OPTIONS) - set(optnames)
if direction == 'FROM':
opts -= ('ENCODING',)
return opts
@cqlsh_syntax_completer('copyOption', 'optvals')
def complete_copy_opt_values(ctxt, cqlsh):
optnames = ctxt.get_binding('optnames', ())
lastopt = optnames[-1].lower()
if lastopt == 'header':
return ['true', 'false']
return [cqlhandling.Hint('<single_character_string>')]
class NoKeyspaceError(Exception):
pass
class KeyspaceNotFound(Exception):
pass
class ColumnFamilyNotFound(Exception):
pass
class VersionNotSupported(Exception):
pass
class DecodeError(Exception):
verb = 'decode'
def __init__(self, thebytes, err, expectedtype, colname=None):
self.thebytes = thebytes
self.err = err
if isinstance(expectedtype, type) and issubclass(expectedtype, CassandraType):
expectedtype = expectedtype.cql_parameterized_type()
self.expectedtype = expectedtype
self.colname = colname
def __str__(self):
return str(self.thebytes)
def message(self):
what = 'value %r' % (self.thebytes,)
if self.colname is not None:
what = 'value %r (for column %r)' % (self.thebytes, self.colname)
return 'Failed to %s %s as %s: %s' \
% (self.verb, what, self.expectedtype, self.err)
def __repr__(self):
return '<%s %s>' % (self.__class__.__name__, self.message())
class FormatError(DecodeError):
verb = 'format'
def full_cql_version(ver):
while ver.count('.') < 2:
ver += '.0'
ver_parts = ver.split('-', 1) + ['']
vertuple = tuple(map(int, ver_parts[0].split('.')) + [ver_parts[1]])
return ver, vertuple
def format_value(val, typeclass, output_encoding, addcolor=False, time_format=None,
float_precision=None, colormap=None, nullval=None):
if isinstance(val, DecodeError):
if addcolor:
return colorme(repr(val.thebytes), colormap, 'error')
else:
return FormattedValue(repr(val.thebytes))
if not issubclass(typeclass, CassandraType):
typeclass = lookup_casstype(typeclass)
return format_by_type(typeclass, val, output_encoding, colormap=colormap,
addcolor=addcolor, nullval=nullval, time_format=time_format,
float_precision=float_precision)
def show_warning_without_quoting_line(message, category, filename, lineno, file=None, line=None):
if file is None:
file = sys.stderr
try:
file.write(warnings.formatwarning(message, category, filename, lineno, line=''))
except IOError:
pass
warnings.showwarning = show_warning_without_quoting_line
warnings.filterwarnings('always', category=cql3handling.UnexpectedTableStructure)
def describe_interval(seconds):
desc = []
for length, unit in ((86400, 'day'), (3600, 'hour'), (60, 'minute')):
num = int(seconds) / length
if num > 0:
desc.append('%d %s' % (num, unit))
if num > 1:
desc[-1] += 's'
seconds %= length
words = '%.03f seconds' % seconds
if len(desc) > 1:
words = ', '.join(desc) + ', and ' + words
elif len(desc) == 1:
words = desc[0] + ' and ' + words
return words
class Shell(cmd.Cmd):
custom_prompt = os.getenv('CQLSH_PROMPT', '')
if custom_prompt is not '':
custom_prompt += "\n"
default_prompt = custom_prompt + "cqlsh> "
continue_prompt = " ... "
keyspace_prompt = custom_prompt + "cqlsh:%s> "
keyspace_continue_prompt = "%s ... "
num_retries = 4
show_line_nums = False
debug = False
stop = False
last_hist = None
shunted_query_out = None
csv_dialect_defaults = dict(delimiter=',', doublequote=False,
escapechar='\\', quotechar='"')
def __init__(self, hostname, port, transport_factory, color=False,
username=None, password=None, encoding=None, stdin=None, tty=True,
completekey=DEFAULT_COMPLETEKEY, use_conn=None,
cqlver=DEFAULT_CQLVER, keyspace=None,
tracing_enabled=False, expand_enabled=False,
display_time_format=DEFAULT_TIME_FORMAT,
display_float_precision=DEFAULT_FLOAT_PRECISION):
cmd.Cmd.__init__(self, completekey=completekey)
self.hostname = hostname
self.port = port
self.transport_factory = transport_factory
self.username = username
self.password = password
self.keyspace = keyspace
self.tracing_enabled = tracing_enabled
self.expand_enabled = expand_enabled
if use_conn is not None:
self.conn = use_conn
else:
transport = transport_factory(hostname, port, os.environ, CONFIG_FILE)
self.conn = cql.connect(hostname, port, user=username, password=password,
cql_version=cqlver, transport=transport)
self.set_expanded_cql_version(cqlver)
# we could set the keyspace through cql.connect(), but as of 1.0.10,
# it doesn't quote the keyspace for USE :(
if keyspace is not None:
tempcurs = self.conn.cursor()
tempcurs.execute('USE %s;' % self.cql_protect_name(keyspace))
tempcurs.close()
self.cursor = self.conn.cursor()
self.get_connection_versions()
self.current_keyspace = keyspace
self.color = color
self.display_time_format = display_time_format
self.display_float_precision = display_float_precision
if encoding is None:
encoding = locale.getpreferredencoding()
self.encoding = encoding
self.output_codec = codecs.lookup(encoding)
self.statement = StringIO()
self.lineno = 1
self.in_comment = False
self.prompt = ''
if stdin is None:
stdin = sys.stdin
self.tty = tty
if tty:
self.reset_prompt()
self.report_connection()
print 'Use HELP for help.'
else:
self.show_line_nums = True
self.stdin = stdin
self.query_out = sys.stdout
def set_expanded_cql_version(self, ver):
ver, vertuple = full_cql_version(ver)
self.set_cql_version(ver)
self.cql_version = ver
self.cql_ver_tuple = vertuple
def cqlver_atleast(self, major, minor=0, patch=0):
return self.cql_ver_tuple[:3] >= (major, minor, patch)
def cassandraver_atleast(self, major, minor=0, patch=0):
return self.cass_ver_tuple[:3] >= (major, minor, patch)
def myformat_value(self, val, casstype, **kwargs):
if isinstance(val, DecodeError):
self.decoding_errors.append(val)
try:
return format_value(val, casstype, self.output_codec.name,
addcolor=self.color, time_format=self.display_time_format,
float_precision=self.display_float_precision, **kwargs)
except Exception, e:
err = FormatError(val, e, casstype)
self.decoding_errors.append(err)
return format_value(err, None, self.output_codec.name, addcolor=self.color)
def myformat_colname(self, name, nametype):
return self.myformat_value(name, nametype, colormap=COLUMN_NAME_COLORS)
# cql/cursor.py:Cursor.decode_row() function, modified to not turn '' into None.
def decode_row(self, cursor, row):
values = []
bytevals = cursor.columnvalues(row)
for val, vtype, nameinfo in zip(bytevals, cursor.column_types, cursor.name_info):
if val == '':
values.append(val)
else:
values.append(cursor.decoder.decode_value(val, vtype, nameinfo[0]))
return values
def report_connection(self):
self.show_host()
self.show_version()
def show_host(self):
print "Connected to %s at %s:%d." % \
(self.applycolor(self.get_cluster_name(), BLUE),
self.hostname,
self.port)
def show_version(self):
vers = self.connection_versions.copy()
vers['shver'] = version
# system.Versions['cql'] apparently does not reflect changes with
# set_cql_version.
vers['cql'] = self.cql_version
print "[cqlsh %(shver)s | Cassandra %(build)s | CQL spec %(cql)s | Thrift protocol %(thrift)s]" % vers
def get_connection_versions(self):
self.cursor.execute("select * from system.local where key = 'local'")
result = self.fetchdict()
vers = {
'build': result['release_version'],
'thrift': result['thrift_version'],
'cql': result['cql_version'],
}
self.connection_versions = vers
self.cass_ver_tuple = tuple(map(int, vers['build'].split('-', 1)[0].split('.')[:3]))
def fetchdict(self):
row = self.cursor.fetchone()
if row is None:
return None
desc = self.cursor.description
return dict(zip([d[0] for d in desc], row))
def fetchdict_all(self):
dicts = []
for row in self.cursor:
desc = self.cursor.description
dicts.append(dict(zip([d[0] for d in desc], row)))
return dicts
def get_keyspace_names(self):
return [k.name for k in self.get_keyspaces()]
def get_columnfamily_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
cf_q = """select columnfamily_name from system.schema_columnfamilies
where keyspace_name=:ks"""
self.cursor.execute(cf_q,
{'ks': self.cql_unprotect_name(ksname)},
consistency_level='ONE')
return [str(row[0]) for row in self.cursor.fetchall()]
def get_index_names(self, ksname=None):
idxnames = []
for cfname in self.get_columnfamily_names(ksname=ksname):
for col in self.get_columnfamily_layout(ksname, cfname).columns:
if col.index_name is not None:
idxnames.append(col.index_name)
return idxnames
def get_column_names(self, ksname, cfname):
if ksname is None:
ksname = self.current_keyspace
layout = self.get_columnfamily_layout(ksname, cfname)
return [col.name for col in layout.columns]
# ===== thrift-dependent parts =====
def get_cluster_name(self):
return self.make_hacktastic_thrift_call('describe_cluster_name')
def get_partitioner(self):
return self.make_hacktastic_thrift_call('describe_partitioner')
def get_snitch(self):
return self.make_hacktastic_thrift_call('describe_snitch')
def get_thrift_version(self):
return self.make_hacktastic_thrift_call('describe_version')
def get_ring(self):
if self.current_keyspace is None or self.current_keyspace == 'system':
raise NoKeyspaceError("Ring view requires a current non-system keyspace")
return self.make_hacktastic_thrift_call('describe_ring', self.current_keyspace)
def get_keyspace(self, ksname):
try:
return self.make_hacktastic_thrift_call('describe_keyspace', ksname)
except cql.cassandra.ttypes.NotFoundException:
raise KeyspaceNotFound('Keyspace %r not found.' % ksname)
def get_keyspaces(self):
return self.make_hacktastic_thrift_call('describe_keyspaces')
def get_schema_versions(self):
return self.make_hacktastic_thrift_call('describe_schema_versions')
def set_cql_version(self, ver):
try:
return self.make_hacktastic_thrift_call('set_cql_version', ver)
except cql.cassandra.ttypes.InvalidRequestException, e:
raise VersionNotSupported(e.why)
def trace_next_query(self):
return self.make_hacktastic_thrift_call('trace_next_query')
def make_hacktastic_thrift_call(self, call, *args):
client = self.conn.client
return getattr(client, call)(*args)
# ===== end thrift-dependent parts =====
# ===== cql3-dependent parts =====
def get_columnfamily_layout(self, ksname, cfname):
if ksname is None:
ksname = self.current_keyspace
cf_q = """select * from system.schema_columnfamilies
where keyspace_name=:ks and columnfamily_name=:cf"""
col_q = """select * from system.schema_columns
where keyspace_name=:ks and columnfamily_name=:cf"""
self.cursor.execute(cf_q,
{'ks': ksname, 'cf': cfname},
consistency_level='ONE')
layout = self.fetchdict()
if layout is None:
raise ColumnFamilyNotFound("Column family %r not found" % cfname)
self.cursor.execute(col_q,
{'ks': ksname, 'cf': cfname},
consistency_level='ONE')
cols = self.fetchdict_all()
return cql3handling.CqlTableDef.from_layout(layout, cols)
# ===== end cql3-dependent parts =====
def reset_statement(self):
self.reset_prompt()
self.statement.truncate(0)
def reset_prompt(self):
if self.current_keyspace is None:
self.set_prompt(self.default_prompt)
else:
self.set_prompt(self.keyspace_prompt % self.current_keyspace)
def set_continue_prompt(self):
if self.current_keyspace is None:
self.set_prompt(self.continue_prompt)
else:
spaces = ' ' * len(str(self.current_keyspace))
self.set_prompt(self.keyspace_continue_prompt % spaces)
@contextmanager
def prepare_loop(self):
readline = None
if self.tty and self.completekey:
try:
import readline
except ImportError:
pass
else:
old_completer = readline.get_completer()
readline.set_completer(self.complete)
if readline.__doc__ is not None and 'libedit' in readline.__doc__:
readline.parse_and_bind("bind -e")
readline.parse_and_bind("bind '" + self.completekey + "' rl_complete")
else:
readline.parse_and_bind(self.completekey + ": complete")
try:
yield
finally:
if readline is not None:
readline.set_completer(old_completer)
def get_input_line(self, prompt=''):
if self.tty:
line = raw_input(prompt) + '\n'
else:
line = self.stdin.readline()
if not len(line):
raise EOFError
self.lineno += 1
return line
def use_stdin_reader(self, until='', prompt=''):
until += '\n'
while True:
try:
newline = self.get_input_line(prompt=prompt)
except EOFError:
return
if newline == until:
return
yield newline
def cmdloop(self):
"""
Adapted from cmd.Cmd's version, because there is literally no way with
cmd.Cmd.cmdloop() to tell the difference between "EOF" showing up in
input and an actual EOF.
"""
with self.prepare_loop():
while not self.stop:
try:
line = self.get_input_line(self.prompt)
self.statement.write(line)
if self.onecmd(self.statement.getvalue()):
self.reset_statement()
except EOFError:
self.handle_eof()
except cql.Error, cqlerr:
self.printerr(str(cqlerr))
except KeyboardInterrupt:
self.reset_statement()
print
def onecmd(self, statementtext):
"""
Returns true if the statement is complete and was handled (meaning it
can be reset).
"""
try:
statements, in_batch = cqlruleset.cql_split_statements(statementtext)
except pylexotron.LexingError, e:
if self.show_line_nums:
self.printerr('Invalid syntax at char %d' % (e.charnum,))
else:
self.printerr('Invalid syntax at line %d, char %d'
% (e.linenum, e.charnum))
statementline = statementtext.split('\n')[e.linenum - 1]
self.printerr(' %s' % statementline)
self.printerr(' %s^' % (' ' * e.charnum))
return True
while statements and not statements[-1]:
statements = statements[:-1]
if not statements:
return True
if in_batch or statements[-1][-1][0] != 'endtoken':
self.set_continue_prompt()
return
for st in statements:
try:
self.handle_statement(st, statementtext)
except Exception, e:
if self.debug:
import traceback
traceback.print_exc()
else:
self.printerr(e)
return True
def handle_eof(self):
if self.tty:
print
statement = self.statement.getvalue()
if statement.strip():
if not self.onecmd(statement):
self.printerr('Incomplete statement at end of file')
self.do_exit()
def handle_statement(self, tokens, srcstr):
# Concat multi-line statements and insert into history
if readline is not None:
nl_count = srcstr.count("\n")
new_hist = srcstr.replace("\n", " ").rstrip()
if nl_count > 1 and self.last_hist != new_hist:
readline.add_history(new_hist)
self.last_hist = new_hist
cmdword = tokens[0][1]
if cmdword == '?':
cmdword = 'help'
custom_handler = getattr(self, 'do_' + cmdword.lower(), None)
if custom_handler:
parsed = cqlruleset.cql_whole_parse_tokens(tokens, srcstr=srcstr,
startsymbol='cqlshCommand')
if parsed and not parsed.remainder:
# successful complete parse
return custom_handler(parsed)
else:
return self.handle_parse_error(cmdword, tokens, parsed, srcstr)
return self.perform_statement(cqlruleset.cql_extract_orig(tokens, srcstr))
def handle_parse_error(self, cmdword, tokens, parsed, srcstr):
if cmdword.lower() in ('select', 'insert', 'update', 'delete', 'truncate',
'create', 'drop', 'alter', 'grant', 'revoke',
'batch', 'list'):
# hey, maybe they know about some new syntax we don't. type
# assumptions won't work, but maybe the query will.
return self.perform_statement(cqlruleset.cql_extract_orig(tokens, srcstr))
if parsed:
self.printerr('Improper %s command (problem at %r).' % (cmdword, parsed.remainder[0]))
else:
self.printerr('Improper %s command.' % cmdword)
def do_use(self, parsed):
ksname = parsed.get_binding('ksname')
if self.perform_statement_untraced(parsed.extract_orig()):
if ksname[0] == '"' and ksname[-1] == '"':
self.current_keyspace = self.cql_unprotect_name(ksname)
else:
self.current_keyspace = ksname.lower()
def do_select(self, parsed):
ksname = parsed.get_binding('ksname')
if ksname is not None:
ksname = self.cql_unprotect_name(ksname)
cfname = self.cql_unprotect_name(parsed.get_binding('cfname'))
statement = parsed.extract_orig()
with_default_limit = parsed.get_binding('limit') is None
if with_default_limit:
statement = "%s LIMIT %d;" % (statement[:-1], DEFAULT_SELECT_LIMIT)
self.perform_statement(statement,
decoder=ErrorHandlingSchemaDecoder,
with_default_limit=with_default_limit)
def perform_statement(self, statement, decoder=None, with_default_limit=False):
if self.tracing_enabled:
session_id = UUID(bytes=self.trace_next_query())
result = self.perform_statement_untraced(statement,
decoder=decoder,
with_default_limit=with_default_limit)
time.sleep(0.5) # trace writes are async so we wait a little.
print_trace_session(self, self.cursor, session_id)
return result
else:
return self.perform_statement_untraced(statement,
decoder=decoder,
with_default_limit=with_default_limit)
def perform_statement_untraced(self, statement, decoder=None, with_default_limit=False):
if not statement:
return False
trynum = 1
while True:
try:
self.cursor.execute(statement, decoder=decoder)
break
except cql.IntegrityError, err:
self.printerr("Attempt #%d: %s" % (trynum, str(err)))
trynum += 1
if trynum > self.num_retries:
return False
time.sleep(1*trynum)
except cql.ProgrammingError, err:
self.printerr(str(err))
return False
except CQL_ERRORS, err:
self.printerr(str(err))
return False
except Exception, err:
import traceback
self.printerr(traceback.format_exc())
return False
if statement[:6].lower() == 'select':
self.print_result(self.cursor, with_default_limit)
elif self.cursor.rowcount == 1:
# CAS INSERT/UPDATE
self.writeresult("")
self.print_static_result(self.cursor)
self.flush_output()
return True
def get_nametype(self, cursor, num):
"""
Determine the Cassandra type of a column name from the current row of
query results on the given cursor. The column in question is given by
its zero-based ordinal number within the row.
This is necessary to differentiate some things like ascii vs. blob hex.
"""
return cursor.name_info[num][1]
def print_result(self, cursor, with_default_limit):
self.decoding_errors = []
self.writeresult("")
if cursor.rowcount != 0:
self.print_static_result(cursor)
self.writeresult("(%d rows)" % cursor.rowcount)
self.writeresult("")
if self.decoding_errors:
for err in self.decoding_errors[:2]:
self.writeresult(err.message(), color=RED)
if len(self.decoding_errors) > 2:
self.writeresult('%d more decoding errors suppressed.'
% (len(self.decoding_errors) - 2), color=RED)
if with_default_limit:
if (self.is_count_result(cursor) and self.get_count(cursor) == DEFAULT_SELECT_LIMIT) \
or cursor.rowcount == DEFAULT_SELECT_LIMIT:
self.writeresult("Default LIMIT of %d was used. "
"Specify your own LIMIT clause to get more results."
% DEFAULT_SELECT_LIMIT, color=RED)
self.writeresult("")
def is_count_result(self, cursor):
return cursor.description == [(u'count', 'LongType', None, None, None, None, True)]
def get_count(self, cursor):
return lookup_casstype('LongType').deserialize(cursor.result[0][0].value)
def print_static_result(self, cursor):
colnames = [d[0] for d in cursor.description]
colnames_t = [(name, self.get_nametype(cursor, n)) for (n, name) in enumerate(colnames)]
formatted_names = [self.myformat_colname(name, nametype) for (name, nametype) in colnames_t]
formatted_values = [map(self.myformat_value, self.decode_row(cursor, row), cursor.column_types) for row in cursor.result]
if self.expand_enabled:
self.print_formatted_result_vertically(formatted_names, formatted_values)
else:
self.print_formatted_result(formatted_names, formatted_values)
def print_formatted_result(self, formatted_names, formatted_values):
# determine column widths
widths = [n.displaywidth for n in formatted_names]
for fmtrow in formatted_values:
for num, col in enumerate(fmtrow):
widths[num] = max(widths[num], col.displaywidth)
# print header
header = ' | '.join(hdr.ljust(w, color=self.color) for (hdr, w) in zip(formatted_names, widths))
self.writeresult(' ' + header.rstrip())
self.writeresult('-%s-' % '-+-'.join('-' * w for w in widths))
# print row data
for row in formatted_values:
line = ' | '.join(col.rjust(w, color=self.color) for (col, w) in zip(row, widths))
self.writeresult(' ' + line)
self.writeresult("")
def print_formatted_result_vertically(self, formatted_names, formatted_values):
max_col_width = max([n.displaywidth for n in formatted_names])
max_val_width = max([n.displaywidth for row in formatted_values for n in row])
# for each row returned, list all the column-value pairs
for row_id, row in enumerate(formatted_values):