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cqlshmain.py
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# 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.
import cmd
import codecs
import configparser
import getpass
import argparse
import os
import re
import subprocess
import sys
import time
import traceback
import warnings
import webbrowser
from contextlib import contextmanager
from enum import Enum
from io import StringIO
from uuid import UUID
import cassandra
from cassandra.auth import PlainTextAuthProvider
from cassandra.cluster import Cluster
from cassandra.cqltypes import cql_typename
from cassandra.marshal import int64_unpack
from cassandra.metadata import (ColumnMetadata, KeyspaceMetadata, TableMetadata)
from cassandra.policies import WhiteListRoundRobinPolicy
from cassandra.query import SimpleStatement, ordered_dict_factory, TraceUnavailable
from cassandra.util import datetime_from_timestamp
from cqlshlib import cql3handling, pylexotron, sslhandling, cqlshhandling, authproviderhandling
from cqlshlib.copyutil import ExportTask, ImportTask
from cqlshlib.displaying import (ANSI_RESET, BLUE, COLUMN_NAME_COLORS, CYAN,
RED, WHITE, FormattedValue, colorme)
from cqlshlib.formatting import (DEFAULT_DATE_FORMAT, DEFAULT_NANOTIME_FORMAT,
DEFAULT_TIMESTAMP_FORMAT, CqlType, DateTimeFormat,
format_by_type)
from cqlshlib.helptopics import get_html_anchor, get_html_topics
from cqlshlib.tracing import print_trace, print_trace_session
from cqlshlib.util import get_file_encoding_bomsize, is_file_secure
from cqlshlib.cqlshhandling import cqlshruleset as ruleset
try:
from cqlshlib.serverversion import version as build_version
except ImportError:
build_version = 'UNKNOWN'
UTF8 = 'utf-8'
version = "6.3.0"
readline = None
try:
# Check if tty first, as 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
# On Linux, the Python webbrowser module uses the 'xdg-open' executable
# to open a file/URL. But that only works, if the current session has been
# opened from _within_ a desktop environment. I.e. 'xdg-open' will fail,
# if the session's been opened via ssh to a remote box.
#
try:
webbrowser.register_standard_browsers() # registration is otherwise lazy in Python3
except AttributeError:
pass
if webbrowser._tryorder and webbrowser._tryorder[0] == 'xdg-open' and os.environ.get('XDG_DATA_DIRS', '') == '':
# only on Linux (some OS with xdg-open)
webbrowser._tryorder.remove('xdg-open')
webbrowser._tryorder.append('xdg-open')
if readline is not None and readline.__doc__ is not None and 'libedit' in readline.__doc__:
DEFAULT_COMPLETEKEY = '\t'
else:
DEFAULT_COMPLETEKEY = 'tab'
# BEGIN history config
def mkdirp(path):
"""Creates all parent directories up to path parameter or fails when path exists, but it is not a directory."""
try:
os.makedirs(path)
except OSError:
if not os.path.isdir(path):
raise
def resolve_cql_history_file():
default_cql_history = os.path.expanduser(os.path.join('~', '.cassandra', 'cqlsh_history'))
if 'CQL_HISTORY' in os.environ:
return os.environ['CQL_HISTORY']
else:
return default_cql_history
HISTORY = resolve_cql_history_file()
HISTORY_DIR = os.path.dirname(HISTORY)
try:
mkdirp(HISTORY_DIR)
except OSError:
print('\nWarning: Cannot create directory at `%s`. Command history will not be saved. Please check what was the environment property CQL_HISTORY set to.\n' % HISTORY_DIR)
# END history config
CQL_ERRORS = (
cassandra.AlreadyExists, cassandra.AuthenticationFailed, cassandra.CoordinationFailure,
cassandra.InvalidRequest, cassandra.Timeout, cassandra.Unauthorized, cassandra.OperationTimedOut,
cassandra.cluster.NoHostAvailable,
cassandra.connection.ConnectionBusy, cassandra.connection.ProtocolError, cassandra.connection.ConnectionException,
cassandra.protocol.ErrorMessage, cassandra.protocol.InternalError, cassandra.query.TraceUnavailable
)
debug_completion = bool(os.environ.get('CQLSH_DEBUG_COMPLETION', '') == 'YES')
class NoKeyspaceError(Exception):
pass
class KeyspaceNotFound(Exception):
pass
class ColumnFamilyNotFound(Exception):
pass
class IndexNotFound(Exception):
pass
class MaterializedViewNotFound(Exception):
pass
class ObjectNotFound(Exception):
pass
class VersionNotSupported(Exception):
pass
class UserTypeNotFound(Exception):
pass
class DecodeError(Exception):
verb = 'decode'
def __init__(self, thebytes, err, colname=None):
self.thebytes = thebytes
self.err = err
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 : %s' \
% (self.verb, what, self.err)
def __repr__(self):
return '<%s %s>' % (self.__class__.__name__, self.message())
class FormatError(DecodeError):
verb = 'format'
class SwitchState(Enum):
ON = True
OFF = False
def format_value(val, cqltype, encoding, addcolor=False, date_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))
return format_by_type(val, cqltype=cqltype, encoding=encoding, colormap=colormap,
addcolor=addcolor, nullval=nullval, date_time_format=date_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)
warnings.filterwarnings("ignore", r".*blist.*")
class Shell(cmd.Cmd):
DEFAULT_HOST = '127.0.0.1'
DEFAULT_PORT = 9042
DEFAULT_SSL = False
DEFAULT_CONNECT_TIMEOUT_SECONDS = 5
DEFAULT_REQUEST_TIMEOUT_SECONDS = 10
DEFAULT_FLOAT_PRECISION = 5
DEFAULT_DOUBLE_PRECISION = 5
DEFAULT_MAX_TRACE_WAIT = 10
DEFAULT_CQLDOCS_URL = 'https://cassandra.apache.org/doc/latest/cassandra/cql/cql_singlefile.html'
custom_prompt = os.getenv('CQLSH_PROMPT', '')
if custom_prompt != '':
custom_prompt += "\n"
default_prompt = custom_prompt + "cqlsh> "
continue_prompt = " ... "
keyspace_prompt = custom_prompt + "cqlsh:{}> "
keyspace_continue_prompt = "{} ... "
show_line_nums = False
debug = False
coverage = False
coveragerc_path = None
stop = False
last_hist = None
shunted_query_out = None
use_paging = True
config_file = None
default_page_size = 100
def __init__(self, hostname, port, config_file, color=False,
username=None, encoding=None, elapsed_enabled=False, stdin=None, tty=True,
completekey=DEFAULT_COMPLETEKEY, browser=None, docspath=None, use_conn=None,
cqlver=None, keyspace=None,
tracing_enabled=False, expand_enabled=False,
display_nanotime_format=DEFAULT_NANOTIME_FORMAT,
display_timestamp_format=DEFAULT_TIMESTAMP_FORMAT,
display_date_format=DEFAULT_DATE_FORMAT,
display_float_precision=DEFAULT_FLOAT_PRECISION,
display_double_precision=DEFAULT_DOUBLE_PRECISION,
display_timezone=None,
max_trace_wait=DEFAULT_MAX_TRACE_WAIT,
ssl=False,
single_statement=None,
request_timeout=DEFAULT_REQUEST_TIMEOUT_SECONDS,
protocol_version=None,
connect_timeout=DEFAULT_CONNECT_TIMEOUT_SECONDS,
is_subshell=False,
auth_provider=None):
cmd.Cmd.__init__(self, completekey=completekey)
self.hostname = hostname
self.port = port
self.auth_provider = auth_provider
self.username = username
self.config_file = config_file
if isinstance(auth_provider, PlainTextAuthProvider):
self.username = auth_provider.username
if not auth_provider.password:
# if no password is provided, we need to query the user to get one.
password = getpass.getpass()
self.auth_provider = PlainTextAuthProvider(username=auth_provider.username, password=password)
self.keyspace = keyspace
self.ssl = ssl
self.tracing_enabled = tracing_enabled
self.page_size = self.default_page_size
self.expand_enabled = expand_enabled
if use_conn:
self.conn = use_conn
else:
kwargs = {}
if protocol_version is not None:
kwargs['protocol_version'] = protocol_version
self.conn = Cluster(contact_points=(self.hostname,), port=self.port, cql_version=cqlver,
auth_provider=self.auth_provider,
ssl_options=sslhandling.ssl_settings(hostname, self.config_file) if ssl else None,
load_balancing_policy=WhiteListRoundRobinPolicy([self.hostname]),
control_connection_timeout=connect_timeout,
connect_timeout=connect_timeout,
**kwargs)
self.owns_connection = not use_conn
if keyspace:
self.session = self.conn.connect(keyspace)
else:
self.session = self.conn.connect()
if browser == "":
browser = None
self.browser = browser
self.docspath = docspath
self.color = color
self.display_nanotime_format = display_nanotime_format
self.display_timestamp_format = display_timestamp_format
self.display_date_format = display_date_format
self.display_float_precision = display_float_precision
self.display_double_precision = display_double_precision
self.display_timezone = display_timezone
self.session.default_timeout = request_timeout
self.session.row_factory = ordered_dict_factory
self.session.default_consistency_level = cassandra.ConsistencyLevel.ONE
self.get_connection_versions()
self.set_cql_version(self.connection_versions['cql'])
self.current_keyspace = keyspace
self.max_trace_wait = max_trace_wait
self.session.max_trace_wait = max_trace_wait
self.tty = tty
self.encoding = encoding
self.elapsed_enabled = elapsed_enabled
self.output_codec = codecs.lookup(encoding)
self.statement = StringIO()
self.lineno = 1
self.prompt = ''
if stdin is None:
stdin = sys.stdin
self.check_build_versions()
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
self.consistency_level = cassandra.ConsistencyLevel.ONE
self.serial_consistency_level = cassandra.ConsistencyLevel.SERIAL
self.empty_lines = 0
self.statement_error = False
self.single_statement = single_statement
self.is_subshell = is_subshell
self.cql_version = None
self.cql_version_str = None
# configure length of history shown
self.max_history_length_shown = 50
self.lastcmd = ""
def check_build_versions(self):
baseversion = self.connection_versions['build']
extra = baseversion.rfind('-')
if extra != -1:
baseversion = baseversion[0:extra]
if baseversion != build_version:
print("WARNING: cqlsh was built against {}, but this server is {}. All features may not work!"
.format(build_version, baseversion), file=sys.stderr)
@property
def batch_mode(self):
return not self.tty
def set_cql_version(self, ver):
v = list(map(int, (ver.split("."))))
while (len(v) < 3):
v.append(0)
self.cql_version = tuple(v)
self.cql_version_str = ".".join(map(str, v))
def myformat_value(self, val, cqltype=None, **kwargs):
if isinstance(val, DecodeError):
self.decoding_errors.append(val)
try:
dtformats = DateTimeFormat(timestamp_format=self.display_timestamp_format,
date_format=self.display_date_format, nanotime_format=self.display_nanotime_format,
timezone=self.display_timezone)
precision = self.display_double_precision if cqltype is not None and cqltype.type_name == 'double' \
else self.display_float_precision
return format_value(val, cqltype=cqltype, encoding=self.output_codec.name,
addcolor=self.color, date_time_format=dtformats,
float_precision=precision, **kwargs)
except Exception as e:
err = FormatError(val, e)
self.decoding_errors.append(err)
return format_value(err, cqltype=cqltype, encoding=self.output_codec.name, addcolor=self.color)
def myformat_colname(self, name, table_meta=None):
column_colors = COLUMN_NAME_COLORS.copy()
# check column role and color appropriately
if table_meta:
if name in [col.name for col in table_meta.partition_key]:
column_colors.default_factory = lambda: RED
elif name in [col.name for col in table_meta.clustering_key]:
column_colors.default_factory = lambda: CYAN
elif name in table_meta.columns and table_meta.columns[name].is_static:
column_colors.default_factory = lambda: WHITE
return self.myformat_value(name, colormap=column_colors)
def report_connection(self):
self.show_host()
self.show_version()
def show_host(self):
print("Connected to {0} at {1}:{2}"
.format(self.applycolor(self.get_cluster_name(), BLUE),
self.hostname,
self.port))
def show_version(self):
vers = self.connection_versions
print(f"[cqlsh {version} | Cassandra {vers['build']} | CQL spec {self.cql_version_str} | Native protocol v{vers['protocol']}]")
def show_session(self, sessionid, partial_session=False):
print_trace_session(self, self.session, sessionid, partial_session)
def show_replicas(self, token_value, keyspace=None):
ks = self.current_keyspace if keyspace is None else keyspace
token_map = self.conn.metadata.token_map
nodes = token_map.get_replicas(ks, token_map.token_class(token_value))
addresses = [x.address for x in nodes]
print(f"{addresses}")
def get_connection_versions(self):
result, = self.session.execute("select * from system.local where key = 'local'")
vers = {
'build': result['release_version'],
'protocol': self.conn.protocol_version,
'cql': result['cql_version'],
}
self.connection_versions = vers
def get_keyspace_names(self):
return list(self.conn.metadata.keyspaces)
def get_columnfamily_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return list(self.get_keyspace_meta(ksname).tables)
def get_materialized_view_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return list(self.get_keyspace_meta(ksname).views)
def get_index_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return list(self.get_keyspace_meta(ksname).indexes)
def get_column_names(self, ksname, cfname):
if ksname is None:
ksname = self.current_keyspace
layout = self.get_table_meta(ksname, cfname)
return list(layout.columns)
def get_usertype_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return list(self.get_keyspace_meta(ksname).user_types)
def get_usertype_layout(self, ksname, typename):
if ksname is None:
ksname = self.current_keyspace
ks_meta = self.get_keyspace_meta(ksname)
try:
user_type = ks_meta.user_types[typename]
except KeyError:
raise UserTypeNotFound("User type {!r} not found".format(typename))
return list(zip(user_type.field_names, user_type.field_types))
def get_userfunction_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return [f.name for f in list(self.get_keyspace_meta(ksname).functions.values())]
def get_useraggregate_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return [f.name for f in list(self.get_keyspace_meta(ksname).aggregates.values())]
def get_cluster_name(self):
return self.conn.metadata.cluster_name
def get_partitioner(self):
return self.conn.metadata.partitioner
def get_keyspace_meta(self, ksname):
if ksname in self.conn.metadata.keyspaces:
return self.conn.metadata.keyspaces[ksname]
raise KeyspaceNotFound('Keyspace %r not found.' % ksname)
def get_keyspaces(self):
return list(self.conn.metadata.keyspaces.values())
def get_ring(self, ks):
self.conn.metadata.token_map.rebuild_keyspace(ks, build_if_absent=True)
return self.conn.metadata.token_map.tokens_to_hosts_by_ks[ks]
def get_table_meta(self, ksname, tablename):
if ksname is None:
ksname = self.current_keyspace
ksmeta = self.get_keyspace_meta(ksname)
if tablename not in ksmeta.tables:
if ksname == 'system_auth' and tablename in ['roles', 'role_permissions', 'generated_password']:
self.get_fake_auth_table_meta(ksname, tablename)
else:
raise ColumnFamilyNotFound("Column family {} not found".format(tablename))
else:
return ksmeta.tables[tablename]
def get_fake_auth_table_meta(self, ksname, tablename):
# may be using external auth implementation so internal tables
# aren't actually defined in schema. In this case, we'll fake
# them up
if tablename == 'roles':
ks_meta = KeyspaceMetadata(ksname, True, None, None)
table_meta = TableMetadata(ks_meta, 'roles')
table_meta.columns['role'] = ColumnMetadata(table_meta, 'role', cassandra.cqltypes.UTF8Type)
table_meta.columns['is_superuser'] = ColumnMetadata(table_meta, 'is_superuser', cassandra.cqltypes.BooleanType)
table_meta.columns['can_login'] = ColumnMetadata(table_meta, 'can_login', cassandra.cqltypes.BooleanType)
elif tablename == 'role_permissions':
ks_meta = KeyspaceMetadata(ksname, True, None, None)
table_meta = TableMetadata(ks_meta, 'role_permissions')
table_meta.columns['role'] = ColumnMetadata(table_meta, 'role', cassandra.cqltypes.UTF8Type)
table_meta.columns['resource'] = ColumnMetadata(table_meta, 'resource', cassandra.cqltypes.UTF8Type)
table_meta.columns['permission'] = ColumnMetadata(table_meta, 'permission', cassandra.cqltypes.UTF8Type)
elif tablename == 'generated_password':
ks_meta = KeyspaceMetadata(ksname, True, None, None)
table_meta = TableMetadata(ks_meta, 'generated_password')
table_meta.columns['generated_password'] = ColumnMetadata(table_meta, 'generated_password', cassandra.cqltypes.UTF8Type)
else:
raise ColumnFamilyNotFound("Column family {} not found".format(tablename))
def get_index_meta(self, ksname, idxname):
if ksname is None:
ksname = self.current_keyspace
ksmeta = self.get_keyspace_meta(ksname)
if idxname not in ksmeta.indexes:
raise IndexNotFound("Index {} not found".format(idxname))
return ksmeta.indexes[idxname]
def get_view_meta(self, ksname, viewname):
if ksname is None:
ksname = self.current_keyspace
ksmeta = self.get_keyspace_meta(ksname)
if viewname not in ksmeta.views:
raise MaterializedViewNotFound("Materialized view '{}' not found".format(viewname))
return ksmeta.views[viewname]
def get_object_meta(self, ks, name):
if name is None:
if ks and ks in self.conn.metadata.keyspaces:
return self.conn.metadata.keyspaces[ks]
elif self.current_keyspace is None:
raise ObjectNotFound("'{}' not found in keyspaces".format(ks))
else:
name = ks
ks = self.current_keyspace
if ks is None:
ks = self.current_keyspace
ksmeta = self.get_keyspace_meta(ks)
if name in ksmeta.tables:
return ksmeta.tables[name]
elif name in ksmeta.indexes:
return ksmeta.indexes[name]
elif name in ksmeta.views:
return ksmeta.views[name]
raise ObjectNotFound("'{}' not found in keyspace '{}'".format(name, ks))
def get_trigger_names(self, ksname=None):
if ksname is None:
ksname = self.current_keyspace
return [trigger.name
for table in list(self.get_keyspace_meta(ksname).tables.values())
for trigger in list(table.triggers.values())]
def reset_statement(self):
self.reset_prompt()
self.statement.truncate(0)
self.statement.seek(0)
self.empty_lines = 0
def reset_prompt(self):
if self.current_keyspace is None:
self.set_prompt(self.default_prompt, True)
else:
self.set_prompt(self.keyspace_prompt.format(self.current_keyspace), True)
def set_continue_prompt(self):
if self.empty_lines >= 3:
self.set_prompt("Statements are terminated with a ';'. You can press CTRL-C to cancel an incomplete statement.")
self.empty_lines = 0
return
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.format(spaces))
self.empty_lines = self.empty_lines + 1 if not self.lastcmd else 0
@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")
readline.parse_and_bind("bind ^R em-inc-search-prev")
else:
readline.parse_and_bind(self.completekey + ": complete")
# start coverage collection if requested, unless in subshell
if self.coverage and not self.is_subshell:
# check for coveragerc file, write it if missing
if os.path.exists(CQL_DIR):
self.coveragerc_path = os.path.join(CQL_DIR, '.coveragerc')
covdata_path = os.path.join(CQL_DIR, '.coverage')
if not os.path.isfile(self.coveragerc_path):
with open(self.coveragerc_path, 'w') as f:
f.writelines(["[run]\n",
"concurrency = multiprocessing\n",
"data_file = {}\n".format(covdata_path),
"parallel = true\n"]
)
# start coverage
import coverage
self.cov = coverage.Coverage(config_file=self.coveragerc_path)
self.cov.start()
try:
yield
finally:
if readline is not None:
readline.set_completer(old_completer)
if self.coverage and not self.is_subshell:
self.stop_coverage()
def get_input_line(self, prompt=''):
if self.tty:
self.lastcmd = input(str(prompt))
line = self.lastcmd + '\n'
else:
self.lastcmd = self.stdin.readline()
line = self.lastcmd
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, intro=None):
"""
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:
if self.single_statement:
line = self.single_statement
self.stop = True
else:
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_ERRORS as cqlerr:
self.printerr(cqlerr.message)
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, endtoken_escaped = ruleset.cql_split_statements(statementtext)
except pylexotron.LexingError as e:
if self.show_line_nums:
self.printerr('Invalid syntax at line {0}, char {1}'
.format(e.linenum, e.charnum))
else:
self.printerr('Invalid syntax at char {0}'.format(e.charnum))
statementline = statementtext.split('\n')[e.linenum - 1]
self.printerr(' {0}'.format(statementline))
self.printerr(' {0}^'.format(' ' * e.charnum))
return True
while statements and not statements[-1]:
statements = statements[:-1]
if not statements:
return True
if endtoken_escaped or statements[-1][-1][0] != 'endtoken':
self.set_continue_prompt()
return
for st in statements:
try:
self.handle_statement(st, statementtext)
except Exception as e:
if self.debug:
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 = ruleset.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(ruleset.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(ruleset.cql_extract_orig(tokens, srcstr))
if parsed:
self.printerr('Improper %s command (problem at %r).' % (cmdword, parsed.remainder[0]))
else:
self.printerr(f'Improper {cmdword} command.')
def do_use(self, parsed):
ksname = parsed.get_binding('ksname')
success, _ = self.perform_simple_statement(SimpleStatement(parsed.extract_orig()))
if success:
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):
tracing_was_enabled = self.tracing_enabled
ksname = parsed.get_binding('ksname')
stop_tracing = ksname == 'system_traces' or (ksname is None and self.current_keyspace == 'system_traces')
self.tracing_enabled = self.tracing_enabled and not stop_tracing
statement = parsed.extract_orig()
self.perform_statement(statement)
self.tracing_enabled = tracing_was_enabled
def perform_statement(self, statement):
stmt = SimpleStatement(statement, consistency_level=self.consistency_level, serial_consistency_level=self.serial_consistency_level, fetch_size=self.page_size if self.use_paging else None)
success, future = self.perform_simple_statement(stmt)
if future:
if future.warnings:
self.print_warnings(future.warnings)
if self.tracing_enabled:
try:
for trace in future.get_all_query_traces(max_wait_per=self.max_trace_wait, query_cl=self.consistency_level):
print_trace(self, trace)
except TraceUnavailable:
msg = "Statement trace did not complete within %d seconds; trace data may be incomplete." % (self.session.max_trace_wait,)
self.writeresult(msg, color=RED)
for trace_id in future.get_query_trace_ids():
self.show_session(trace_id, partial_session=True)
except Exception as err:
self.printerr("Unable to fetch query trace: %s" % (str(err),))
return success
def parse_for_select_meta(self, query_string):
try:
parsed = ruleset.cql_parse(query_string)[1]
except IndexError:
return None
ks = self.cql_unprotect_name(parsed.get_binding('ksname', None))
name = self.cql_unprotect_name(parsed.get_binding('cfname', None))
try:
return self.get_table_meta(ks, name)
except ColumnFamilyNotFound:
try:
return self.get_view_meta(ks, name)
except MaterializedViewNotFound:
raise ObjectNotFound("'{}' not found in keyspace '{}'".format(name, ks))
def parse_for_update_meta(self, query_string):
try:
parsed = ruleset.cql_parse(query_string)[1]
except IndexError:
return None
ks = self.cql_unprotect_name(parsed.get_binding('ksname', None))
cf = self.cql_unprotect_name(parsed.get_binding('cfname'))
return self.get_table_meta(ks, cf)
def perform_simple_statement(self, statement):
if not statement:
return False, None
start_time = time.time()
future = self.session.execute_async(statement, trace=self.tracing_enabled)
result = None
try:
result = future.result()
except CQL_ERRORS as err:
err_msg = err.message if hasattr(err, 'message') else str(err)
self.printerr(str(err.__class__.__name__) + ": " + err_msg)
except Exception:
import traceback
self.printerr(traceback.format_exc())
# Even if statement failed we try to refresh schema if not agreed (see CASSANDRA-9689)
if not future.is_schema_agreed:
try:
self.conn.refresh_schema_metadata(5) # will throw exception if there is a schema mismatch
except Exception:
self.printerr("Warning: schema version mismatch detected; check the schema versions of your "
"nodes in system.local and system.peers.")
self.conn.refresh_schema_metadata(-1)
elapsed = int((time.time() - start_time) * 1000)
if result is None:
return False, None
if statement.query_string[:6].lower() == 'select':
self.print_result(result, self.parse_for_select_meta(statement.query_string))
elif statement.query_string.lower().startswith("list users") or statement.query_string.lower().startswith("list roles"):
self.print_result(result, self.get_table_meta('system_auth', 'roles'))
elif statement.query_string.lower().startswith("list"):
self.print_result(result, self.get_table_meta('system_auth', 'role_permissions'))
elif statement.query_string.lower().startswith("create user") or statement.query_string.lower().startswith("create role"):
self.print_result(result, self.get_table_meta('system_auth', 'generated_password'))
elif statement.query_string.lower().startswith("alter user") or statement.query_string.lower().startswith("alter role"):
self.print_result(result, self.get_table_meta('system_auth', 'generated_password'))
elif result:
# CAS INSERT/UPDATE
self.writeresult("")
self.print_static_result(result, self.parse_for_update_meta(statement.query_string), with_header=True, tty=self.tty)
if self.elapsed_enabled:
self.writeresult("(%dms elapsed)" % elapsed)
self.flush_output()
return True, future
def print_result(self, result, table_meta):
self.decoding_errors = []
self.writeresult("")
def print_all(result, table_meta, tty):
# Return the number of rows in total
num_rows = 0
is_first = True
while True:
# Always print for the first page even it is empty
if result.current_rows or is_first:
with_header = is_first or tty
self.print_static_result(result, table_meta, with_header, tty, num_rows)
num_rows += len(result.current_rows)
if result.has_more_pages:
if self.shunted_query_out is None and tty:
# Only pause when not capturing.
input("---MORE---")
result.fetch_next_page()
else:
if not tty:
self.writeresult("")
break
is_first = False
return num_rows
num_rows = print_all(result, table_meta, self.tty)
self.writeresult("(%d rows)" % num_rows)
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)
def print_static_result(self, result, table_meta, with_header, tty, row_count_offset=0):
if not result.column_names and not table_meta:
return
column_names = result.column_names or list(table_meta.columns.keys())
formatted_names = [self.myformat_colname(name, table_meta) for name in column_names]
if not result.current_rows:
# print header only
self.print_formatted_result(formatted_names, None, with_header=True, tty=tty)
return
cql_types = []
if result.column_types:
ks_name = table_meta.keyspace_name if table_meta else self.current_keyspace
ks_meta = self.conn.metadata.keyspaces.get(ks_name, None)
cql_types = [CqlType(cql_typename(t), ks_meta) for t in result.column_types]
formatted_values = [list(map(self.myformat_value, [row[c] for c in column_names], cql_types)) for row in result.current_rows]
if self.expand_enabled:
self.print_formatted_result_vertically(formatted_names, formatted_values, row_count_offset)
else:
self.print_formatted_result(formatted_names, formatted_values, with_header, tty)
def print_formatted_result(self, formatted_names, formatted_values, with_header, tty):
# determine column widths
widths = [n.displaywidth for n in formatted_names]
if formatted_values is not None:
for fmtrow in formatted_values:
for num, col in enumerate(fmtrow):
widths[num] = max(widths[num], col.displaywidth)