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cql3handling.py
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cql3handling.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.
from cassandra.metadata import maybe_escape_name
from cqlshlib import helptopics
from cqlshlib.cqlhandling import CqlParsingRuleSet, Hint
simple_cql_types = {'ascii', 'bigint', 'blob', 'boolean', 'counter', 'date', 'decimal', 'double', 'duration', 'float',
'inet', 'int', 'smallint', 'text', 'time', 'timestamp', 'timeuuid', 'tinyint', 'uuid', 'varchar',
'varint'}
simple_cql_types.difference_update(('set', 'map', 'list', 'vector'))
class UnexpectedTableStructure(UserWarning):
def __init__(self, msg):
self.msg = msg
def __str__(self):
return 'Unexpected table structure; may not translate correctly to CQL. ' + self.msg
SYSTEM_KEYSPACES = ('system', 'system_schema', 'system_traces', 'system_auth', 'system_distributed', 'system_views',
'system_metrics', 'system_virtual_schema', 'system_cluster_metadata')
NONALTERBALE_KEYSPACES = ('system', 'system_schema', 'system_views', 'system_metrics', 'system_virtual_schema',
'system_cluster_metadata')
class Cql3ParsingRuleSet(CqlParsingRuleSet):
columnfamily_layout_options = (
('allow_auto_snapshot', None),
('bloom_filter_fp_chance', None),
('comment', None),
('gc_grace_seconds', None),
('incremental_backups', None),
('min_index_interval', None),
('max_index_interval', None),
('default_time_to_live', None),
('speculative_retry', None),
('additional_write_policy', None),
('memtable', None),
('memtable_flush_period_in_ms', None),
('cdc', None),
('read_repair', None),
)
columnfamily_layout_map_options = (
# (CQL3 option name, schema_columnfamilies column name (or None if same),
# list of known map keys)
('compaction', 'compaction_strategy_options',
('class', 'max_threshold', 'tombstone_compaction_interval', 'tombstone_threshold', 'enabled',
'unchecked_tombstone_compaction', 'only_purge_repaired_tombstones', 'provide_overlapping_tombstones')),
('compression', 'compression_parameters',
('class', 'chunk_length_in_kb', 'enabled', 'min_compress_ratio', 'max_compressed_length')),
('caching', None,
('rows_per_partition', 'keys')),
)
obsolete_cf_options = ()
consistency_levels = (
'ANY',
'ONE',
'TWO',
'THREE',
'QUORUM',
'ALL',
'LOCAL_QUORUM',
'EACH_QUORUM',
'SERIAL'
)
size_tiered_compaction_strategy_options = (
'min_sstable_size',
'min_threshold',
'bucket_high',
'bucket_low'
)
leveled_compaction_strategy_options = (
'sstable_size_in_mb',
'fanout_size'
)
time_window_compaction_strategy_options = (
'compaction_window_unit',
'compaction_window_size',
'min_threshold',
'timestamp_resolution'
)
unified_compaction_strategy_options = (
'scaling_parameters',
'min_sstable_size',
'flush_size_override',
'base_shard_count',
'target_sstable_size',
'sstable_growth',
'max_sstables_to_compact',
'expired_sstable_check_frequency_seconds',
'unsafe_aggressive_sstable_expiration',
'overlap_inclusion_method'
)
@classmethod
def escape_value(cls, value):
if value is None:
return 'NULL' # this totally won't work
if isinstance(value, bool):
value = str(value).lower()
elif isinstance(value, float):
return '%f' % value
elif isinstance(value, int):
return str(value)
return "'%s'" % value.replace("'", "''")
@classmethod
def escape_name(cls, name):
if name is None:
return 'NULL'
return "'%s'" % name.replace("'", "''")
@staticmethod
def dequote_name(name):
name = name.strip()
if name == '':
return name
if name[0] == '"' and name[-1] == '"':
return name[1:-1].replace('""', '"')
else:
return name.lower()
@staticmethod
def dequote_value(cqlword):
cqlword = cqlword.strip()
if cqlword == '':
return cqlword
if cqlword[0] == "'" and cqlword[-1] == "'":
cqlword = cqlword[1:-1].replace("''", "'")
return cqlword
CqlRuleSet = Cql3ParsingRuleSet()
# convenience for remainder of module
completer_for = CqlRuleSet.completer_for
explain_completion = CqlRuleSet.explain_completion
dequote_value = CqlRuleSet.dequote_value
dequote_name = CqlRuleSet.dequote_name
escape_value = CqlRuleSet.escape_value
# BEGIN SYNTAX/COMPLETION RULE DEFINITIONS
syntax_rules = r'''
<Start> ::= <CQL_Statement>*
;
<CQL_Statement> ::= [statements]=<statementBody> ";"
;
# the order of these terminal productions is significant:
<endline> ::= /\n/ ;
JUNK ::= /([ \t\r\f\v]+|(--|[/][/])[^\n\r]*([\n\r]|$)|[/][*].*?[*][/])/ ;
<stringLiteral> ::= <quotedStringLiteral>
| <pgStringLiteral> ;
<quotedStringLiteral> ::= /'([^']|'')*'/ ;
<pgStringLiteral> ::= /\$\$(?:(?!\$\$).)*\$\$/;
<quotedName> ::= /"([^"]|"")*"/ ;
<float> ::= /-?[0-9]+\.[0-9]+/ ;
<uuid> ::= /[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}/ ;
<blobLiteral> ::= /0x[0-9a-f]+/ ;
<wholenumber> ::= /[0-9]+/ ;
<identifier> ::= /[a-z][a-z0-9_]*/ ;
<colon> ::= ":" ;
<star> ::= "*" ;
<endtoken> ::= ";" ;
<op> ::= /[-+=%/,().]/ ;
<cmp> ::= /[<>!]=?/ ;
<brackets> ::= /[][{}]/ ;
<integer> ::= "-"? <wholenumber> ;
<boolean> ::= "true"
| "false"
;
<unclosedPgString>::= /\$\$(?:(?!\$\$).)*/ ;
<unclosedString> ::= /'([^']|'')*/ ;
<unclosedName> ::= /"([^"]|"")*/ ;
<unclosedComment> ::= /[/][*].*$/ ;
<term> ::= <stringLiteral>
| <integer>
| <float>
| <uuid>
| <boolean>
| <blobLiteral>
| <collectionLiteral>
| <functionLiteral> <functionArguments>
| "NULL"
;
<functionLiteral> ::= (<identifier> ( "." <identifier> )?)
| "TOKEN"
;
<functionArguments> ::= "(" ( <term> ( "," <term> )* )? ")"
;
<tokenDefinition> ::= token="TOKEN" "(" <term> ( "," <term> )* ")"
| <term>
;
<cident> ::= <quotedName>
| <identifier>
| <unreservedKeyword>
;
<colname> ::= <cident> ; # just an alias
<collectionLiteral> ::= <listLiteral>
| <setLiteral>
| <mapLiteral>
;
<listLiteral> ::= "[" ( <term> ( "," <term> )* )? "]"
;
<setLiteral> ::= "{" ( <term> ( "," <term> )* )? "}"
;
<mapLiteral> ::= "{" <term> ":" <term> ( "," <term> ":" <term> )* "}"
;
<anyFunctionName> ::= ( ksname=<cfOrKsName> dot="." )? udfname=<cfOrKsName> ;
<userFunctionName> ::= ( ksname=<nonSystemKeyspaceName> dot="." )? udfname=<cfOrKsName> ;
<refUserFunctionName> ::= udfname=<cfOrKsName> ;
<userAggregateName> ::= ( ksname=<nonSystemKeyspaceName> dot="." )? udaname=<cfOrKsName> ;
<functionAggregateName> ::= ( ksname=<nonSystemKeyspaceName> dot="." )? functionname=<cfOrKsName> ;
<aggregateName> ::= <userAggregateName>
;
<functionName> ::= <functionAggregateName>
| "TOKEN"
;
<statementBody> ::= <useStatement>
| <selectStatement>
| <dataChangeStatement>
| <schemaChangeStatement>
| <authenticationStatement>
| <authorizationStatement>
;
<dataChangeStatement> ::= <insertStatement>
| <updateStatement>
| <deleteStatement>
| <truncateStatement>
| <batchStatement>
;
<schemaChangeStatement> ::= <createKeyspaceStatement>
| <createColumnFamilyStatement>
| <createIndexStatement>
| <createMaterializedViewStatement>
| <createUserTypeStatement>
| <createFunctionStatement>
| <createAggregateStatement>
| <createTriggerStatement>
| <dropKeyspaceStatement>
| <dropColumnFamilyStatement>
| <dropIndexStatement>
| <dropMaterializedViewStatement>
| <dropUserTypeStatement>
| <dropFunctionStatement>
| <dropAggregateStatement>
| <dropTriggerStatement>
| <alterTableStatement>
| <alterKeyspaceStatement>
| <alterUserTypeStatement>
;
<authenticationStatement> ::= <createUserStatement>
| <alterUserStatement>
| <dropUserStatement>
| <listUsersStatement>
| <createRoleStatement>
| <alterRoleStatement>
| <dropRoleStatement>
| <listRolesStatement>
;
<authorizationStatement> ::= <grantStatement>
| <grantRoleStatement>
| <revokeStatement>
| <revokeRoleStatement>
| <listPermissionsStatement>
;
# timestamp is included here, since it's also a keyword
<simpleStorageType> ::= typename=( <identifier> | <stringLiteral> | "timestamp" ) ;
<userType> ::= utname=<cfOrKsName> ;
<storageType> ::= ( <simpleStorageType> | <collectionType> | <frozenCollectionType> | <vectorType> | <userType> ) ( <column_mask> )? ;
<column_mask> ::= "MASKED" "WITH" ( "DEFAULT" | <functionName> <selectionFunctionArguments> );
# Note: autocomplete for frozen collection types does not handle nesting past depth 1 properly,
# but that's a lot of work to fix for little benefit.
<collectionType> ::= "map" "<" <simpleStorageType> "," ( <simpleStorageType> | <userType> ) ">"
| "list" "<" ( <simpleStorageType> | <userType> ) ">"
| "set" "<" ( <simpleStorageType> | <userType> ) ">"
;
<frozenCollectionType> ::= "frozen" "<" "map" "<" <storageType> "," <storageType> ">" ">"
| "frozen" "<" "list" "<" <storageType> ">" ">"
| "frozen" "<" "set" "<" <storageType> ">" ">"
;
<vectorType> ::= "vector" "<" <storageType> "," <wholenumber> ">" ;
<columnFamilyName> ::= ( ksname=<cfOrKsName> dot="." )? cfname=<cfOrKsName> ;
<materializedViewName> ::= ( ksname=<cfOrKsName> dot="." )? mvname=<cfOrKsName> ;
<userTypeName> ::= ( ksname=<cfOrKsName> dot="." )? utname=<cfOrKsName> ;
<keyspaceName> ::= ksname=<cfOrKsName> ;
<nonSystemKeyspaceName> ::= ksname=<cfOrKsName> ;
<alterableKeyspaceName> ::= ksname=<cfOrKsName> ;
<cfOrKsName> ::= <identifier>
| <quotedName>
| <unreservedKeyword>;
<unreservedKeyword> ::= nocomplete=
( "key"
| "clustering"
# | "count" -- to get count(*) completion, treat count as reserved
| "ttl"
| "compact"
| "storage"
| "type"
| "values" )
;
<property> ::= [propname]=<cident> propeq="=" [propval]=<propertyValue>
;
<propertyValue> ::= propsimpleval=( <stringLiteral>
| <identifier>
| <integer>
| <float>
| <unreservedKeyword> )
# we don't use <mapLiteral> here so we can get more targeted
# completions:
| propsimpleval="{" [propmapkey]=<term> ":" [propmapval]=<term>
( ender="," [propmapkey]=<term> ":" [propmapval]=<term> )*
ender="}"
;
'''
def prop_equals_completer(ctxt, cass):
if not working_on_keyspace(ctxt):
# we know if the thing in the property name position is "compact" or
# "clustering" that there won't actually be an equals sign, because
# there are no properties by those names. there are, on the other hand,
# table properties that start with those keywords which don't have
# equals signs at all.
curprop = ctxt.get_binding('propname')[-1].upper()
if curprop in ('COMPACT', 'CLUSTERING'):
return ()
return ['=']
completer_for('property', 'propeq')(prop_equals_completer)
@completer_for('property', 'propname')
def prop_name_completer(ctxt, cass):
if working_on_keyspace(ctxt):
return ks_prop_name_completer(ctxt, cass)
elif 'MATERIALIZED' == ctxt.get_binding('wat', '').upper():
props = cf_prop_name_completer(ctxt, cass)
props.remove('default_time_to_live')
props.remove('gc_grace_seconds')
return props
else:
return cf_prop_name_completer(ctxt, cass)
@completer_for('propertyValue', 'propsimpleval')
def prop_val_completer(ctxt, cass):
if working_on_keyspace(ctxt):
return ks_prop_val_completer(ctxt, cass)
else:
return cf_prop_val_completer(ctxt, cass)
@completer_for('propertyValue', 'propmapkey')
def prop_val_mapkey_completer(ctxt, cass):
if working_on_keyspace(ctxt):
return ks_prop_val_mapkey_completer(ctxt, cass)
else:
return cf_prop_val_mapkey_completer(ctxt, cass)
@completer_for('propertyValue', 'propmapval')
def prop_val_mapval_completer(ctxt, cass):
if working_on_keyspace(ctxt):
return ks_prop_val_mapval_completer(ctxt, cass)
else:
return cf_prop_val_mapval_completer(ctxt, cass)
@completer_for('propertyValue', 'ender')
def prop_val_mapender_completer(ctxt, cass):
if working_on_keyspace(ctxt):
return ks_prop_val_mapender_completer(ctxt, cass)
else:
return cf_prop_val_mapender_completer(ctxt, cass)
def ks_prop_name_completer(ctxt, cass):
optsseen = ctxt.get_binding('propname', ())
if 'replication' not in optsseen:
return ['replication']
return ["durable_writes"]
def ks_prop_val_completer(ctxt, cass):
optname = ctxt.get_binding('propname')[-1]
if optname == 'durable_writes':
return ["'true'", "'false'"]
if optname == 'replication':
return ["{'class': '"]
return ()
def ks_prop_val_mapkey_completer(ctxt, cass):
optname = ctxt.get_binding('propname')[-1]
if optname != 'replication':
return ()
keysseen = list(map(dequote_value, ctxt.get_binding('propmapkey', ())))
valsseen = list(map(dequote_value, ctxt.get_binding('propmapval', ())))
for k, v in zip(keysseen, valsseen):
if k == 'class':
repclass = v
break
else:
return ["'class'"]
if repclass == 'SimpleStrategy':
opts = {'replication_factor'}
elif repclass == 'NetworkTopologyStrategy':
return [Hint('<dc_name>')]
return list(map(escape_value, opts.difference(keysseen)))
def ks_prop_val_mapval_completer(ctxt, cass):
optname = ctxt.get_binding('propname')[-1]
if optname != 'replication':
return ()
currentkey = dequote_value(ctxt.get_binding('propmapkey')[-1])
if currentkey == 'class':
return list(map(escape_value, CqlRuleSet.replication_strategies))
return [Hint('<term>')]
def ks_prop_val_mapender_completer(ctxt, cass):
optname = ctxt.get_binding('propname')[-1]
if optname != 'replication':
return [',']
keysseen = list(map(dequote_value, ctxt.get_binding('propmapkey', ())))
valsseen = list(map(dequote_value, ctxt.get_binding('propmapval', ())))
for k, v in zip(keysseen, valsseen):
if k == 'class':
repclass = v
break
else:
return [',']
if repclass == 'SimpleStrategy':
if 'replication_factor' not in keysseen:
return [',']
if repclass == 'NetworkTopologyStrategy' and len(keysseen) == 1:
return [',']
return ['}']
def cf_prop_name_completer(ctxt, cass):
return [c[0] for c in (CqlRuleSet.columnfamily_layout_options
+ CqlRuleSet.columnfamily_layout_map_options)]
def cf_prop_val_completer(ctxt, cass):
exist_opts = ctxt.get_binding('propname')
this_opt = exist_opts[-1]
if this_opt == 'compression':
return ["{'class': '"]
if this_opt == 'compaction':
return ["{'class': '"]
if this_opt == 'caching':
return ["{'keys': '"]
if any(this_opt == opt[0] for opt in CqlRuleSet.obsolete_cf_options):
return ["'<obsolete_option>'"]
if this_opt == 'bloom_filter_fp_chance':
return [Hint('<float_between_0_and_1>')]
if this_opt in ('min_compaction_threshold', 'max_compaction_threshold',
'gc_grace_seconds', 'min_index_interval', 'max_index_interval'):
return [Hint('<integer>')]
if this_opt in ('cdc'):
return [Hint('<true|false>')]
if this_opt in ('read_repair'):
return [Hint('<\'none\'|\'blocking\'>')]
if this_opt == 'allow_auto_snapshot':
return [Hint('<boolean>')]
if this_opt == 'incremental_backups':
return [Hint('<boolean>')]
return [Hint('<option_value>')]
def cf_prop_val_mapkey_completer(ctxt, cass):
optname = ctxt.get_binding('propname')[-1]
for cql3option, _, subopts in CqlRuleSet.columnfamily_layout_map_options:
if optname == cql3option:
break
else:
return ()
keysseen = list(map(dequote_value, ctxt.get_binding('propmapkey', ())))
valsseen = list(map(dequote_value, ctxt.get_binding('propmapval', ())))
pairsseen = dict(list(zip(keysseen, valsseen)))
if optname == 'compression':
return list(map(escape_value, set(subopts).difference(keysseen)))
if optname == 'caching':
return list(map(escape_value, set(subopts).difference(keysseen)))
if optname == 'compaction':
opts = set(subopts)
try:
csc = pairsseen['class']
except KeyError:
return ["'class'"]
csc = csc.split('.')[-1]
if csc == 'SizeTieredCompactionStrategy':
opts = opts.union(set(CqlRuleSet.size_tiered_compaction_strategy_options))
elif csc == 'LeveledCompactionStrategy':
opts = opts.union(set(CqlRuleSet.leveled_compaction_strategy_options))
elif csc == 'TimeWindowCompactionStrategy':
opts = opts.union(set(CqlRuleSet.time_window_compaction_strategy_options))
elif csc == 'UnifiedCompactionStrategy':
opts = opts.union(set(CqlRuleSet.unified_compaction_strategy_options))
return list(map(escape_value, opts))
return ()
def cf_prop_val_mapval_completer(ctxt, cass):
opt = ctxt.get_binding('propname')[-1]
key = dequote_value(ctxt.get_binding('propmapkey')[-1])
if opt == 'compaction':
if key == 'class':
return list(map(escape_value, CqlRuleSet.available_compaction_classes))
if key == 'provide_overlapping_tombstones':
return [Hint('<NONE|ROW|CELL>')]
return [Hint('<option_value>')]
elif opt == 'compression':
if key == 'class':
return list(map(escape_value, CqlRuleSet.available_compression_classes))
return [Hint('<option_value>')]
elif opt == 'caching':
if key == 'rows_per_partition':
return ["'ALL'", "'NONE'", Hint('#rows_per_partition')]
elif key == 'keys':
return ["'ALL'", "'NONE'"]
return ()
def cf_prop_val_mapender_completer(ctxt, cass):
return [',', '}']
@completer_for('tokenDefinition', 'token')
def token_word_completer(ctxt, cass):
return ['token(']
@completer_for('simpleStorageType', 'typename')
def storagetype_completer(ctxt, cass):
return simple_cql_types
@completer_for('keyspaceName', 'ksname')
def ks_name_completer(ctxt, cass):
return list(map(maybe_escape_name, cass.get_keyspace_names()))
@completer_for('nonSystemKeyspaceName', 'ksname')
def non_system_ks_name_completer(ctxt, cass):
ksnames = [n for n in cass.get_keyspace_names() if n not in SYSTEM_KEYSPACES]
return list(map(maybe_escape_name, ksnames))
@completer_for('alterableKeyspaceName', 'ksname')
def alterable_ks_name_completer(ctxt, cass):
ksnames = [n for n in cass.get_keyspace_names() if n not in NONALTERBALE_KEYSPACES]
return list(map(maybe_escape_name, ksnames))
def cf_ks_name_completer(ctxt, cass):
return [maybe_escape_name(ks) + '.' for ks in cass.get_keyspace_names()]
completer_for('columnFamilyName', 'ksname')(cf_ks_name_completer)
completer_for('materializedViewName', 'ksname')(cf_ks_name_completer)
def cf_ks_dot_completer(ctxt, cass):
name = dequote_name(ctxt.get_binding('ksname'))
if name in cass.get_keyspace_names():
return ['.']
return []
completer_for('columnFamilyName', 'dot')(cf_ks_dot_completer)
completer_for('materializedViewName', 'dot')(cf_ks_dot_completer)
@completer_for('columnFamilyName', 'cfname')
def cf_name_completer(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
try:
cfnames = cass.get_columnfamily_names(ks)
except Exception:
if ks is None:
return ()
raise
return list(map(maybe_escape_name, cfnames))
@completer_for('materializedViewName', 'mvname')
def mv_name_completer(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
try:
mvnames = cass.get_materialized_view_names(ks)
except Exception:
if ks is None:
return ()
raise
return list(map(maybe_escape_name, mvnames))
completer_for('userTypeName', 'ksname')(cf_ks_name_completer)
completer_for('userTypeName', 'dot')(cf_ks_dot_completer)
def ut_name_completer(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
try:
utnames = cass.get_usertype_names(ks)
except Exception:
if ks is None:
return ()
raise
return list(map(maybe_escape_name, utnames))
completer_for('userTypeName', 'utname')(ut_name_completer)
completer_for('userType', 'utname')(ut_name_completer)
@completer_for('unreservedKeyword', 'nocomplete')
def unreserved_keyword_completer(ctxt, cass):
# we never want to provide completions through this production;
# this is always just to allow use of some keywords as column
# names, CF names, property values, etc.
return ()
def get_table_meta(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
cf = dequote_name(ctxt.get_binding('cfname'))
return cass.get_table_meta(ks, cf)
def get_ut_layout(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
ut = dequote_name(ctxt.get_binding('utname'))
return cass.get_usertype_layout(ks, ut)
def working_on_keyspace(ctxt):
wat = ctxt.get_binding('wat', '').upper()
if wat in ('KEYSPACE', 'SCHEMA'):
return True
return False
syntax_rules += r'''
<useStatement> ::= "USE" <keyspaceName>
;
<selectStatement> ::= "SELECT" ( "JSON" )? <selectClause>
"FROM" (cf=<columnFamilyName> | mv=<materializedViewName>)
( "WHERE" <whereClause> )?
( "GROUP" "BY" <groupByClause> ( "," <groupByClause> )* )?
( "ORDER" "BY" <orderByClause> ( "," <orderByClause> )* )?
( "PER" "PARTITION" "LIMIT" perPartitionLimit=<wholenumber> )?
( "LIMIT" limit=<wholenumber> )?
( "ALLOW" "FILTERING" )?
;
<whereClause> ::= <relation> ( "AND" <relation> )*
;
<relation> ::= [rel_lhs]=<cident> ( "[" <term> "]" )? ( "=" | "<" | ">" | "<=" | ">=" | "CONTAINS" ( "KEY" )? ) <term>
| token="TOKEN" "(" [rel_tokname]=<cident>
( "," [rel_tokname]=<cident> )*
")" ("=" | "<" | ">" | "<=" | ">=") <tokenDefinition>
| [rel_lhs]=<cident> "IN" "(" <term> ( "," <term> )* ")"
;
<selectClause> ::= "DISTINCT"? <selector> ("AS" <cident>)? ("," <selector> ("AS" <cident>)?)*
| "*"
;
<udtSubfieldSelection> ::= <identifier> "." <identifier>
;
<selector> ::= [colname]=<cident> ( "[" ( <term> ( ".." <term> "]" )? | <term> ".." ) )?
| <udtSubfieldSelection>
| "WRITETIME" "(" [colname]=<cident> ")"
| "MAXWRITETIME" "(" [colname]=<cident> ")"
| "TTL" "(" [colname]=<cident> ")"
| "COUNT" "(" star=( "*" | "1" ) ")"
| "CAST" "(" <selector> "AS" <storageType> ")"
| <functionName> <selectionFunctionArguments>
| <term>
;
<selectionFunctionArguments> ::= "(" ( <selector> ( "," <selector> )* )? ")"
;
<orderByClause> ::= [ordercol]=<cident> ( "ASC" | "DESC" )?
;
<groupByClause> ::= [groupcol]=<cident>
| <functionName><groupByFunctionArguments>
;
<groupByFunctionArguments> ::= "(" ( <groupByFunctionArgument> ( "," <groupByFunctionArgument> )* )? ")"
;
<groupByFunctionArgument> ::= [groupcol]=<cident>
| <term>
;
'''
def udf_name_completer(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
try:
udfnames = cass.get_userfunction_names(ks)
except Exception:
if ks is None:
return ()
raise
return list(map(maybe_escape_name, udfnames))
def uda_name_completer(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
try:
udanames = cass.get_useraggregate_names(ks)
except Exception:
if ks is None:
return ()
raise
return list(map(maybe_escape_name, udanames))
def udf_uda_name_completer(ctxt, cass):
ks = ctxt.get_binding('ksname', None)
if ks is not None:
ks = dequote_name(ks)
try:
functionnames = cass.get_userfunction_names(ks) + cass.get_useraggregate_names(ks)
except Exception:
if ks is None:
return ()
raise
return list(map(maybe_escape_name, functionnames))
def ref_udf_name_completer(ctxt, cass):
try:
udanames = cass.get_userfunction_names(None)
except Exception:
return ()
return list(map(maybe_escape_name, udanames))
completer_for('functionAggregateName', 'ksname')(cf_ks_name_completer)
completer_for('functionAggregateName', 'dot')(cf_ks_dot_completer)
completer_for('functionAggregateName', 'functionname')(udf_uda_name_completer)
completer_for('anyFunctionName', 'ksname')(cf_ks_name_completer)
completer_for('anyFunctionName', 'dot')(cf_ks_dot_completer)
completer_for('anyFunctionName', 'udfname')(udf_name_completer)
completer_for('userFunctionName', 'ksname')(cf_ks_name_completer)
completer_for('userFunctionName', 'dot')(cf_ks_dot_completer)
completer_for('userFunctionName', 'udfname')(udf_name_completer)
completer_for('refUserFunctionName', 'udfname')(ref_udf_name_completer)
completer_for('userAggregateName', 'ksname')(cf_ks_name_completer)
completer_for('userAggregateName', 'dot')(cf_ks_dot_completer)
completer_for('userAggregateName', 'udaname')(uda_name_completer)
@completer_for('orderByClause', 'ordercol')
def select_order_column_completer(ctxt, cass):
prev_order_cols = ctxt.get_binding('ordercol', ())
keyname = ctxt.get_binding('keyname')
if keyname is None:
keyname = ctxt.get_binding('rel_lhs', ())
if not keyname:
return [Hint("Can't ORDER BY here: need to specify partition key in WHERE clause")]
layout = get_table_meta(ctxt, cass)
order_by_candidates = [col.name for col in layout.clustering_key]
if len(order_by_candidates) > len(prev_order_cols):
return [maybe_escape_name(order_by_candidates[len(prev_order_cols)])]
return [Hint('No more orderable columns here.')]
@completer_for('groupByClause', 'groupcol')
def select_group_column_completer(ctxt, cass):
prev_group_cols = ctxt.get_binding('groupcol', ())
layout = get_table_meta(ctxt, cass)
group_by_candidates = [col.name for col in layout.primary_key]
if len(group_by_candidates) > len(prev_group_cols):
return [maybe_escape_name(group_by_candidates[len(prev_group_cols)])]
return [Hint('No more columns here.')]
@completer_for('relation', 'token')
def relation_token_word_completer(ctxt, cass):
return ['TOKEN(']
@completer_for('relation', 'rel_tokname')
def relation_token_subject_completer(ctxt, cass):
layout = get_table_meta(ctxt, cass)
return [key.name for key in layout.partition_key]
@completer_for('relation', 'rel_lhs')
def select_relation_lhs_completer(ctxt, cass):
layout = get_table_meta(ctxt, cass)
filterable = set()
already_filtered_on = list(map(dequote_name, ctxt.get_binding('rel_lhs', ())))
for num in range(0, len(layout.partition_key)):
if num == 0 or layout.partition_key[num - 1].name in already_filtered_on:
filterable.add(layout.partition_key[num].name)
else:
break
for num in range(0, len(layout.clustering_key)):
if num == 0 or layout.clustering_key[num - 1].name in already_filtered_on:
filterable.add(layout.clustering_key[num].name)
else:
break
for idx in layout.indexes.values():
filterable.add(idx.index_options["target"])
return list(map(maybe_escape_name, filterable))
explain_completion('selector', 'colname')
syntax_rules += r'''
<insertStatement> ::= "INSERT" "INTO" cf=<columnFamilyName>
( ( "(" [colname]=<cident> ( "," [colname]=<cident> )* ")"
"VALUES" "(" [newval]=<term> ( valcomma="," [newval]=<term> )* valcomma=")")
| ("JSON" <stringLiteral>))
( "IF" "NOT" "EXISTS")?
( "USING" [insertopt]=<usingOption>
( "AND" [insertopt]=<usingOption> )* )?
;
<usingOption> ::= "TIMESTAMP" <wholenumber>
| "TTL" <wholenumber>
;
'''
def regular_column_names(table_meta):
if not table_meta or not table_meta.columns:
return []
regular_columns = list(set(table_meta.columns.keys())
- set([key.name for key in table_meta.partition_key])
- set([key.name for key in table_meta.clustering_key]))
return regular_columns
@completer_for('insertStatement', 'colname')
def insert_colname_completer(ctxt, cass):
layout = get_table_meta(ctxt, cass)
colnames = set(map(dequote_name, ctxt.get_binding('colname', ())))
keycols = layout.primary_key
for k in keycols:
if k.name not in colnames:
return [maybe_escape_name(k.name)]
normalcols = set(regular_column_names(layout)) - colnames
return list(map(maybe_escape_name, normalcols))
@completer_for('insertStatement', 'newval')
def insert_newval_completer(ctxt, cass):
layout = get_table_meta(ctxt, cass)
insertcols = list(map(dequote_name, ctxt.get_binding('colname')))
valuesdone = ctxt.get_binding('newval', ())
if len(valuesdone) >= len(insertcols):
return []
curcol = insertcols[len(valuesdone)]
coltype = layout.columns[curcol].cql_type
if coltype.startswith('map<') or coltype.startswith('set<'):
return ['{']
if coltype.startswith('list<') or coltype.startswith('vector<'):
return ['[']
if coltype == 'boolean':
return ['true', 'false']
return [Hint('<value for %s (%s)>' % (maybe_escape_name(curcol),
coltype))]
@completer_for('insertStatement', 'valcomma')
def insert_valcomma_completer(ctxt, cass):
numcols = len(ctxt.get_binding('colname', ()))
numvals = len(ctxt.get_binding('newval', ()))
if numcols > numvals:
return [',']
return [')']
@completer_for('insertStatement', 'insertopt')
def insert_option_completer(ctxt, cass):
opts = set('TIMESTAMP TTL'.split())
for opt in ctxt.get_binding('insertopt', ()):
opts.discard(opt.split()[0])
return opts
syntax_rules += r'''
<updateStatement> ::= "UPDATE" cf=<columnFamilyName>
( "USING" [updateopt]=<usingOption>
( "AND" [updateopt]=<usingOption> )* )?
"SET" <assignment> ( "," <assignment> )*
"WHERE" <whereClause>
( "IF" ( "EXISTS" | <conditions> ))?
;
<assignment> ::= updatecol=<cident>
(( "=" update_rhs=( <term> | <cident> )
( counterop=( "+" | "-" ) inc=<wholenumber>
| listadder="+" listcol=<cident> )? )
| ( indexbracket="[" <term> "]" "=" <term> )
| ( udt_field_dot="." udt_field=<identifier> "=" <term> ))
;
<conditions> ::= <condition> ( "AND" <condition> )*
;
<condition_op_and_rhs> ::= (("=" | "<" | ">" | "<=" | ">=" | "!=" | "CONTAINS" ( "KEY" )? ) <term>)
| ("IN" "(" <term> ( "," <term> )* ")" )
;
<condition> ::= conditioncol=<cident>
( (( indexbracket="[" <term> "]" )
|( udt_field_dot="." udt_field=<identifier> )) )?
<condition_op_and_rhs>
;
'''
@completer_for('updateStatement', 'updateopt')
def update_option_completer(ctxt, cass):
opts = set('TIMESTAMP TTL'.split())
for opt in ctxt.get_binding('updateopt', ()):