1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
|
module Groonga
module Sharding
class DynamicColumns
include Enumerable
class << self
def parse(tag, input)
initial_contexts = {}
filtered_contexts = {}
output_contexts = {}
labeled_arguments = LabeledArguments.new(input, /columns?/)
labeled_arguments.each do |label, arguments|
contexts = nil
case arguments["stage"]
when "initial"
contexts = initial_contexts
when "filtered"
contexts = filtered_contexts
when "output"
contexts = output_contexts
else
next
end
contexts[label] = DynamicColumnExecuteContext.new(tag,
label,
arguments)
end
new(DynamicColumnExecuteContexts.new(initial_contexts),
DynamicColumnExecuteContexts.new(filtered_contexts),
DynamicColumnExecuteContexts.new(output_contexts))
end
end
def initialize(initial_contexts,
filtered_contexts,
output_contexts)
@initial_contexts = initial_contexts
@filtered_contexts = filtered_contexts
@output_contexts = output_contexts
end
def have_initial?
not @initial_contexts.empty?
end
def have_filtered?
not @filtered_contexts.empty?
end
def have_output?
not @output_contexts.empty?
end
def have_window_function?
any? do |context|
context.window_function?
end
end
def each_initial(&block)
@initial_contexts.tsort_each(&block)
end
def each_filtered(&block)
@filtered_contexts.tsort_each(&block)
end
def each_output(&block)
@output_contexts.tsort_each(&block)
end
def each(&block)
each_initial(&block)
each_filtered(&block)
each_output(&block)
end
def apply_initial(targets, options={})
apply(@initial_contexts, targets, options)
end
def apply_filtered(targets, options={})
apply(@filtered_contexts, targets, options)
end
def apply_output(targets, options={})
apply(@output_contexts, targets, options)
end
def empty?
@initial_contexts.empty? and
@filtered_contexts.empty? and
@output_contexts.empty?
end
def cache_key
key = ""
[
@initial_contexts,
@filtered_contexts,
@output_contexts,
].each do |contexts|
contexts.sort_by(&:label).each do |context|
key << "#{context.label}\0"
key << "#{context.stage}\0"
key << "#{context.type.name}\0"
key << "#{context.flags}\0"
key << "#{context.value}\0"
key << "#{context.window_sort_keys.join(',')}\0"
key << "#{context.window_group_keys.join(',')}\0"
end
end
key
end
private
def apply(contexts, targets, options)
window_function_contexts = []
normal_contexts = []
contexts.tsort_each do |context|
if context.window_function?
window_function_contexts << context
else
normal_contexts << context
end
end
if options.fetch(:normal, true)
targets.each do |result_set, target_options|
normal_contexts.each do |context|
global_options = nil
if options and options[:query_log_prefix]
global_options = {
query_log_prefix: options[:query_log_prefix],
}
end
if target_options and global_options
target_options = global_options.merge(target_options)
elsif global_options
target_options = global_options
end
context.apply(result_set, target_options)
end
end
end
if options.fetch(:window_function, true)
window_function_contexts.each do |context|
context.apply_window_function(targets, options)
end
end
end
end
class DynamicColumnExecuteContexts
include Enumerable
include TSort
def initialize(contexts)
@contexts = contexts
@dependencies = {}
@contexts.each do |label, context|
dependencies = []
# TODO: Too rough.
context.value.split(/[ \(\),]+/).each do |component|
depended_context = @contexts[component]
dependencies << depended_context if depended_context
end
context.window_sort_keys.each do |key|
depended_context = @contexts[key.gsub(/\A-/, "")]
dependencies << depended_context if depended_context
end
context.window_group_keys.each do |key|
depended_context = @contexts[key]
dependencies << depended_context if depended_context
end
@dependencies[label] = dependencies
end
end
def empty?
@contexts.empty?
end
def each(&block)
@contexts.each_value(&block)
end
def tsort_each_node(&block)
@contexts.each_value(&block)
end
def tsort_each_child(context, &block)
@dependencies[context.label].each(&block)
end
end
class DynamicColumnExecuteContext
include QueryLoggable
include KeysParsable
attr_reader :label
attr_reader :stage
attr_reader :type
attr_reader :flags
attr_reader :value
attr_reader :window_sort_keys
attr_reader :window_group_keys
def initialize(tag, label, arguments)
@tag = tag
@label = label
@stage = arguments["stage"]
@type = parse_type(arguments["type"])
@flags = parse_flags(arguments["flags"] || "COLUMN_SCALAR")
@value = arguments["value"]
@window_sort_keys = parse_keys(arguments["window.sort_keys"])
@window_group_keys = parse_keys(arguments["window.group_keys"])
end
def window_function?
(not @window_sort_keys.empty?) or
(not @window_group_keys.empty?)
end
def apply(table, options=nil)
return if table.find_column(@label)
column = table.create_column(@label, @flags, @type)
query_log_prefix = nil
query_log_prefix = options[:query_log_prefix] if options
unless table.empty?
condition = nil
condition = options[:condition] if options
expression = Expression.create(table)
begin
expression.parse(@value)
expression.condition = condition if condition
table.apply_expression(column, expression)
ensure
expression.close
end
end
query_logger.log(:size, ":",
"#{query_log_prefix}columns[#{@label}](#{table.size})")
end
def apply_window_function(targets, options=nil)
executor = WindowFunctionExecutor.new
n_records = 0
begin
executor.source = @value
executor.sort_keys = @window_sort_keys.join(", ")
executor.group_keys = @window_group_keys.join(", ")
executor.output_column_name = @label
targets.each do |table, target_options|
is_context_table = context_target?(target_options)
column = table.find_column(@label)
column ||= table.create_column(@label, @flags, @type)
next if table.empty?
if is_context_table
executor.add_context_table(table)
else
executor.add_table(table)
n_records += table.size
end
end
executor.execute
ensure
executor.close
end
query_log_prefix = nil
query_log_prefix = options[:query_log_prefix] if options
query_logger.log(:size, ":",
"#{query_log_prefix}columns[#{@label}](#{n_records})")
end
private
def parse_type(type_raw)
return nil if type_raw.nil?
type = Context.instance[type_raw]
if type.nil?
message = "#{error_message_tag} unknown type: <#{type_raw}>"
raise InvalidArgument, message
end
case type
when Type, Table
type
else
message = "#{error_message_tag} invalid type: #{type.grn_inspect}"
raise InvalidArgument, message
end
end
def parse_flags(flags_raw)
Column.parse_flags(error_message_tag, flags_raw)
end
def context_target?(options)
options and options[:context]
end
def error_message_tag
"#{@tag}[columns][#{@stage}][#{@label}]"
end
end
end
end
|
