class SiriGrammar(Grammar):
'''
SiriDB grammar.
Note: choices can be optimized using most_greedy=False when there
is a preferable order in choices.
This only should be used when there's no conflict in making a
decision by the parser. (e.g. two choices should start with the
same keyword because in that case we should usually take the most
greedy one)
'''
RE_KEYWORDS = re.compile('[a-z_]+')
# Regular expressions
r_float = Regex('[-+]?[0-9]*\.?[0-9]+')
r_integer = Regex('[-+]?[0-9]+')
r_uinteger = Regex('[0-9]+')
r_time_str = Regex('[0-9]+[smhdw]')
r_singleq_str = Regex('(?:\'(?:[^\']*)\')+')
r_doubleq_str = Regex('(?:"(?:[^"]*)")+')
r_grave_str = Regex('(?:`(?:[^`]*)`)+')
r_uuid_str = Regex(
'[0-9a-f]{8}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{12}')
# we only allow an optional 'i' for case-insensitive regex
r_regex = Regex('(/[^/\\\\]*(?:\\\\.[^/\\\\]*)*/i?)')
r_comment = Regex('#.*')
# Keywords
k_access = Keyword('access')
k_active_handles = Keyword('active_handles')
k_address = Keyword('address')
k_after = Keyword('after')
k_all = Keyword('all')
k_alter = Keyword('alter')
k_and = Keyword('and')
k_as = Keyword('as')
k_backup_mode = Keyword('backup_mode')
k_before = Keyword('before')
k_buffer_size = Keyword('buffer_size')
k_buffer_path = Keyword('buffer_path')
k_between = Keyword('between')
k_count = Keyword('count')
k_create = Keyword('create')
k_critical = Keyword('critical')
k_database = Keyword('database')
k_dbname = Keyword('dbname')
k_dbpath = Keyword('dbpath')
k_debug = Keyword('debug')
k_derivative = Keyword('derivative')
k_difference = Keyword('difference')
k_drop = Keyword('drop')
k_drop_threshold = Keyword('drop_threshold')
k_duration_log = Keyword('duration_log')
k_duration_num = Keyword('duration_num')
k_end = Keyword('end')
k_error = Keyword('error')
k_expression = Keyword('expression')
k_false = Keyword('false')
k_fifo_files = Keyword('fifo_files')
k_filter = Keyword('filter')
k_first = Keyword('first')
k_float = Keyword('float')
k_for = Keyword('for')
k_from = Keyword('from')
k_full = Keyword('full')
k_grant = Keyword('grant')
k_group = Keyword('group')
k_groups = Keyword('groups')
k_help = Choice(Keyword('help'), Token('?'))
k_info = Keyword('info')
k_ignore_threshold = Keyword('ignore_threshold')
k_insert = Keyword('insert')
k_integer = Keyword('integer')
k_intersection = Choice(
Token('&'),
Keyword('intersection'),
most_greedy=False)
k_ip_support = Keyword('ip_support')
k_last = Keyword('last')
k_length = Keyword('length')
k_libuv = Keyword('libuv')
k_limit = Keyword('limit')
k_list = Keyword('list')
k_list_limit = Keyword('list_limit')
k_log = Keyword('log')
k_log_level = Keyword('log_level')
k_max = Keyword('max')
k_max_open_files = Keyword('max_open_files')
k_mean = Keyword('mean')
k_median = Keyword('median')
k_median_low = Keyword('median_low')
k_median_high = Keyword('median_high')
k_mem_usage = Keyword('mem_usage')
k_merge = Keyword('merge')
k_min = Keyword('min')
k_modify = Keyword('modify')
k_name = Keyword('name')
k_now = Keyword('now')
k_number = Keyword('number')
k_online = Keyword('online')
k_open_files = Keyword('open_files')
k_or = Keyword('or')
k_password = Keyword('password')
k_points = Keyword('points')
k_pool = Keyword('pool')
k_pools = Keyword('pools')
k_port = Keyword('port')
k_prefix = Keyword('prefix')
k_pvariance = Keyword('pvariance')
k_read = Keyword('read')
k_received_points = Keyword('received_points')
k_reindex_progress = Keyword('reindex_progress')
k_revoke = Keyword('revoke')
k_select = Keyword('select')
k_select_points_limit = Keyword('select_points_limit')
k_selected_points = Keyword('selected_points')
k_series = Keyword('series')
k_server = Keyword('server')
k_servers = Keyword('servers')
k_set = Keyword('set')
k_sid = Keyword('sid')
k_shards = Keyword('shards')
k_show = Keyword('show')
k_size = Keyword('size')
k_start = Keyword('start')
k_startup_time = Keyword('startup_time')
k_status = Keyword('status')
k_stddev = Keyword('stddev')
k_string = Keyword('string')
k_suffix = Keyword('suffix')
k_sum = Keyword('sum')
k_symmetric_difference = Choice(
Token('^'),
Keyword('symmetric_difference'),
most_greedy=False)
k_sync_progress = Keyword('sync_progress')
k_timeit = Keyword('timeit')
k_timezone = Keyword('timezone')
k_time_precision = Keyword('time_precision')
k_to = Keyword('to')
k_true = Keyword('true')
k_type = Keyword('type')
k_union = Choice(
Tokens(', |'),
Keyword('union'),
most_greedy=False)
k_uptime = Keyword('uptime')
k_user = Keyword('user')
k_users = Keyword('users')
k_using = Keyword('using')
k_uuid = Keyword('uuid')
k_variance = Keyword('variance')
k_version = Keyword('version')
k_warning = Keyword('warning')
k_where = Keyword('where')
k_who_am_i = Keyword('who_am_i')
k_write = Keyword('write')
c_difference = Choice(
Token('-'),
k_difference,
most_greedy=False)
access_keywords = Choice(
k_read,
k_write,
k_modify,
k_full,
k_select,
k_show,
k_list,
k_count,
k_create,
k_insert,
k_drop,
k_grant,
k_revoke,
k_alter,
most_greedy=False)
_boolean = Choice(k_true, k_false, most_greedy=False)
log_keywords = Choice(
k_debug,
k_info,
k_warning,
k_error,
k_critical,
most_greedy=False)
int_expr = Prio(
r_integer,
Sequence('(', THIS, ')'),
Sequence(THIS, Tokens('+ - * % /'), THIS))
string = Choice(r_singleq_str, r_doubleq_str, most_greedy=False)
time_expr = Prio(
r_time_str,
k_now,
string,
r_integer,
Sequence('(', THIS, ')'),
Sequence(THIS, Tokens('+ - * % /'), THIS))
series_columns = List(Choice(
k_name,
k_type,
k_length,
k_start,
k_end,
k_pool,
most_greedy=False), ',', 1)
shard_columns = List(Choice(
k_sid,
k_pool,
k_server,
k_size,
k_start,
k_end,
k_type,
k_status,
most_greedy=False), ',', 1)
server_columns = List(Choice(
# Local properties
k_address,
k_buffer_path,
k_buffer_size,
k_dbpath,
k_ip_support,
k_libuv,
k_name,
k_port,
k_uuid,
k_pool,
k_version,
k_online,
k_startup_time,
k_status,
# Remote properties
k_active_handles,
k_fifo_files,
k_log_level,
k_max_open_files,
k_mem_usage,
k_open_files,
k_received_points,
k_reindex_progress,
k_selected_points,
k_sync_progress,
k_uptime,
most_greedy=False), ',', 1)
group_columns = List(Choice(
k_expression,
k_name,
k_series,
most_greedy=False), ',', 1)
user_columns = List(Choice(
k_name,
k_access,
most_greedy=False), ',', 1)
pool_props = Choice(
k_pool,
k_servers,
k_series,
most_greedy=False)
pool_columns = List(pool_props, ',', 1)
bool_operator = Tokens('== !=')
int_operator = Tokens('< > == != <= >=')
str_operator = Tokens('< > == != <= >= ~ !~')
# where group
where_group = Sequence(k_where, Prio(
Sequence(k_series, int_operator, int_expr),
Sequence(
Choice(k_expression, k_name, most_greedy=False),
str_operator,
string),
Sequence('(', THIS, ')'),
Sequence(THIS, k_and, THIS),
Sequence(THIS, k_or, THIS)))
# where pool
where_pool = Sequence(k_where, Prio(
Sequence(pool_props, int_operator, int_expr),
Sequence('(', THIS, ')'),
Sequence(THIS, k_and, THIS),
Sequence(THIS, k_or, THIS)))
# where series
where_series = Sequence(k_where, Prio(
Sequence(
Choice(k_length, k_pool, most_greedy=False),
int_operator,
int_expr),
Sequence(k_name, str_operator, string),
Sequence(
Choice(k_start, k_end, most_greedy=False),
int_operator,
time_expr),
Sequence(
k_type,
bool_operator,
Choice(k_string, k_integer, k_float, most_greedy=False)),
Sequence('(', THIS, ')'),
Sequence(THIS, k_and, THIS),
Sequence(THIS, k_or, THIS)))
# where server
where_server = Sequence(k_where, Prio(
Sequence(Choice(
k_active_handles,
k_buffer_size,
k_fifo_files,
k_port,
k_pool,
k_startup_time,
k_max_open_files,
k_mem_usage,
k_open_files,
k_received_points,
k_selected_points,
k_uptime,
most_greedy=False), int_operator, int_expr),
Sequence(Choice(
k_address,
k_buffer_path,
k_dbpath,
k_ip_support,
k_libuv,
k_name,
k_uuid,
k_version,
k_status,
k_reindex_progress,
k_sync_progress,
most_greedy=False), str_operator, string),
Sequence(k_online, bool_operator, _boolean),
Sequence(k_log_level, int_operator, log_keywords),
Sequence('(', THIS, ')'),
Sequence(THIS, k_and, THIS),
Sequence(THIS, k_or, THIS)))
# where shard
where_shard = Sequence(k_where, Prio(
Sequence(
Choice(k_sid, k_pool, k_size, most_greedy=False),
int_operator,
int_expr),
Sequence(Choice(k_server, k_status), str_operator, string),
Sequence(
Choice(k_start, k_end, most_greedy=False),
int_operator,
time_expr),
Sequence(
k_type,
bool_operator,
Choice(k_number, k_log, most_greedy=False)),
Sequence('(', THIS, ')'),
Sequence(THIS, k_and, THIS),
Sequence(THIS, k_or, THIS)))
# where user
where_user = Sequence(k_where, Prio(
Sequence(k_name, str_operator, string),
Sequence(k_access, int_operator, access_keywords),
Sequence('(', THIS, ')'),
Sequence(THIS, k_and, THIS),
Sequence(THIS, k_or, THIS)))
series_sep = Choice(
k_union,
c_difference,
k_intersection,
k_symmetric_difference,
most_greedy=False)
series_all = Choice(Token('*'), k_all, most_greedy=False)
series_name = Repeat(string, 1, 1)
group_name = Repeat(r_grave_str, 1, 1)
series_re = Repeat(r_regex, 1, 1)
uuid = Choice(r_uuid_str, string, most_greedy=False)
group_match = Repeat(r_grave_str, 1, 1)
series_match = List(
Choice(
series_all,
series_name,
group_match,
series_re,
most_greedy=False),
series_sep,
1)
limit_expr = Sequence(k_limit, int_expr)
before_expr = Sequence(k_before, time_expr)
after_expr = Sequence(k_after, time_expr)
between_expr = Sequence(k_between, time_expr, k_and, time_expr)
access_expr = List(access_keywords, ',', 1)
prefix_expr = Sequence(k_prefix, string)
suffix_expr = Sequence(k_suffix, string)
f_all = Choice(Token('*'), k_all, most_greedy=False)
f_points = Repeat(k_points, 1, 1) # DEPRECATED
f_difference = Sequence(
k_difference,
'(',
Optional(time_expr),
')')
f_derivative = Sequence(
k_derivative,
'(',
List(time_expr, ',', 0, 2),
')')
f_mean = Sequence(
k_mean,
'(', Optional(time_expr), ')')
f_median = Sequence(
k_median,
'(', Optional(time_expr), ')')
f_median_low = Sequence(
k_median_low,
'(', Optional(time_expr), ')')
f_median_high = Sequence(
k_median_high,
'(', Optional(time_expr), ')')
f_sum = Sequence(
k_sum,
'(', Optional(time_expr), ')')
f_min = Sequence(
k_min,
'(', Optional(time_expr), ')')
f_max = Sequence(
k_max,
'(', Optional(time_expr), ')')
f_count = Sequence(
k_count,
'(', Optional(time_expr), ')')
f_variance = Sequence(
k_variance,
'(', Optional(time_expr), ')')
f_pvariance = Sequence(
k_pvariance,
'(', Optional(time_expr), ')')
f_stddev = Sequence(
k_stddev,
'(', Optional(time_expr), ')')
f_first = Sequence(
k_first,
'(', Optional(time_expr), ')')
f_last = Sequence(
k_last,
'(', Optional(time_expr), ')')
f_filter = Sequence(
k_filter,
'(',
Optional(str_operator),
Choice(
string,
r_integer,
r_float,
most_greedy=True),
')')
f_limit = Sequence(
k_limit,
'(',
int_expr,
',',
Choice(
k_mean,
k_median,
k_median_high,
k_median_low,
k_sum,
k_min,
k_max,
k_count,
k_variance,
k_pvariance,
k_stddev,
k_first,
k_last,
most_greedy=False),
')')
aggregate_functions = List(Choice(
f_all,
f_limit,
f_mean,
f_sum,
f_median,
f_median_low,
f_median_high,
f_min,
f_max,
f_count,
f_variance,
f_pvariance,
f_stddev,
f_first,
f_last,
f_difference,
f_derivative,
f_filter,
f_points,
most_greedy=False), '=>', 1)
select_aggregate = Sequence(
aggregate_functions,
Optional(prefix_expr),
Optional(suffix_expr))
select_aggregates = List(select_aggregate, ',', 1)
merge_as = Sequence(
k_merge,
k_as,
string,
Optional(Sequence(k_using, aggregate_functions)))
set_address = Sequence(k_set, k_address, string)
set_backup_mode = Sequence(k_set, k_backup_mode, _boolean)
set_drop_threshold = Sequence(k_set, k_drop_threshold, r_float)
set_expression = Sequence(k_set, k_expression, r_regex)
set_ignore_threshold = Sequence(k_set, k_ignore_threshold, _boolean)
set_list_limit = Sequence(k_set, k_list_limit, r_uinteger)
set_log_level = Sequence(k_set, k_log_level, log_keywords)
set_name = Sequence(k_set, k_name, string)
set_password = Sequence(k_set, k_password, string)
set_port = Sequence(k_set, k_port, r_uinteger)
set_select_points_limit = Sequence(
k_set, k_select_points_limit, r_uinteger)
set_timezone = Sequence(k_set, k_timezone, string)
alter_database = Sequence(k_database, Choice(
set_drop_threshold,
set_list_limit,
set_select_points_limit,
set_timezone,
most_greedy=False))
alter_group = Sequence(k_group, group_name, Choice(
set_expression,
set_name,
most_greedy=False))
alter_server = Sequence(k_server, uuid, Choice(
set_log_level,
set_backup_mode,
set_address,
set_port,
most_greedy=False))
alter_servers = Sequence(k_servers, Optional(where_server), set_log_level)
alter_user = Sequence(k_user, string, Choice(
set_password,
set_name,
most_greedy=False))
count_groups = Sequence(
k_groups, Optional(where_group))
count_pools = Sequence(
k_pools, Optional(where_pool))
count_series = Sequence(
k_series, Optional(series_match), Optional(where_series))
count_servers = Sequence(
k_servers, Optional(where_server))
count_servers_received = Sequence(
k_servers,
k_received_points,
Optional(where_server))
count_servers_selected = Sequence(
k_servers,
k_selected_points,
Optional(where_server))
count_shards = Sequence(
k_shards, Optional(where_shard))
count_shards_size = Sequence(
k_shards, k_size, Optional(where_shard))
count_users = Sequence(
k_users, Optional(where_user))
count_series_length = Sequence(
k_series,
k_length,
Optional(series_match),
Optional(where_series))
create_group = Sequence(
k_group, group_name, k_for, r_regex)
create_user = Sequence(
k_user, string, set_password)
drop_group = Sequence(k_group, group_name)
# Drop statement needs at least a series_math or where STMT or both
drop_series = Sequence(
k_series,
Optional(series_match),
Optional(where_series),
Optional(set_ignore_threshold))
drop_shards = Sequence(
k_shards,
Optional(where_shard),
Optional(set_ignore_threshold))
drop_server = Sequence(k_server, uuid)
drop_user = Sequence(k_user, string)
grant_user = Sequence(
k_user, string, Optional(set_password))
list_groups = Sequence(
k_groups, Optional(group_columns), Optional(where_group))
list_pools = Sequence(
k_pools, Optional(pool_columns), Optional(where_pool))
list_series = Sequence(
k_series,
Optional(series_columns),
Optional(series_match),
Optional(where_series))
list_servers = Sequence(
k_servers, Optional(server_columns), Optional(where_server))
list_shards = Sequence(
k_shards, Optional(shard_columns), Optional(where_shard))
list_users = Sequence(
k_users, Optional(user_columns), Optional(where_user))
revoke_user = Sequence(k_user, string)
alter_stmt = Sequence(k_alter, Choice(
alter_user,
alter_group,
alter_server,
alter_servers,
alter_database,
most_greedy=False))
calc_stmt = Repeat(time_expr, 1, 1)
count_stmt = Sequence(k_count, Choice(
count_groups,
count_pools,
count_series,
count_servers,
count_servers_received,
count_servers_selected,
count_shards,
count_shards_size,
count_users,
count_series_length,
most_greedy=True))
create_stmt = Sequence(k_create, Choice(
create_group,
create_user))
drop_stmt = Sequence(k_drop, Choice(
drop_group,
drop_series,
drop_shards,
drop_server,
drop_user,
most_greedy=False))
grant_stmt = Sequence(k_grant, access_expr, k_to, Choice(
grant_user,
most_greedy=False))
list_stmt = Sequence(k_list, Choice(
list_series,
list_users,
list_shards,
list_groups,
list_servers,
list_pools,
most_greedy=False
), Optional(limit_expr))
revoke_stmt = Sequence(k_revoke, access_expr, k_from, Choice(
revoke_user,
most_greedy=False))
select_stmt = Sequence(
k_select,
select_aggregates,
k_from,
series_match,
Optional(where_series),
Optional(Choice(
after_expr,
between_expr,
before_expr,
most_greedy=False)),
Optional(merge_as))
show_stmt = Sequence(k_show, List(Choice(
k_active_handles,
k_buffer_path,
k_buffer_size,
k_dbname,
k_dbpath,
k_drop_threshold,
k_duration_log,
k_duration_num,
k_fifo_files,
k_ip_support,
k_libuv,
k_list_limit,
k_log_level,
k_max_open_files,
k_mem_usage,
k_open_files,
k_pool,
k_received_points,
k_reindex_progress,
k_selected_points,
k_select_points_limit,
k_server,
k_startup_time,
k_status,
k_sync_progress,
k_time_precision,
k_timezone,
k_uptime,
k_uuid,
k_version,
k_who_am_i,
most_greedy=False), ',', 0))
timeit_stmt = Repeat(k_timeit, 1, 1)
