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
|
#include "HierarchyDictionariesUtils.h"
#include <Columns/ColumnNullable.h>
namespace DB
{
namespace ErrorCodes
{
extern const int UNSUPPORTED_METHOD;
}
namespace detail
{
ColumnPtr convertElementsAndOffsetsIntoArray(ElementsAndOffsets && elements_and_offsets)
{
auto elements_column = ColumnVector<UInt64>::create();
elements_column->getData() = std::move(elements_and_offsets.elements);
auto offsets_column = ColumnVector<IColumn::Offset>::create();
offsets_column->getData() = std::move(elements_and_offsets.offsets);
auto column_array = ColumnArray::create(std::move(elements_column), std::move(offsets_column));
return column_array;
}
}
namespace
{
struct ChildToParentHierarchicalContext
{
HashMap<UInt64, UInt64> child_key_to_parent_key;
std::optional<HashSet<UInt64>> child_key_parent_key_is_null;
};
/** In case of cache or direct dictionary we does not have structure with child to parent representation.
* This function build such structure calling getColumn for initial keys to request and for next keys in hierarchy,
* until all keys are requested or result key is null value.
* To distinguish null value key and key that is not present in dictionary, we use special default value column
* with max UInt64 value, if result column key has such value we assume that current key is not presented in dictionary storage.
*/
ChildToParentHierarchicalContext getChildToParentHierarchicalContext(
const IDictionary * dictionary,
const DictionaryAttribute & hierarchical_attribute,
const PaddedPODArray<UInt64> & initial_keys_to_request,
const DataTypePtr & key_type)
{
std::optional<UInt64> null_value;
if (!hierarchical_attribute.null_value.isNull())
null_value = hierarchical_attribute.null_value.get<UInt64>();
ColumnPtr key_to_request_column = ColumnVector<UInt64>::create();
auto * key_to_request_column_typed = static_cast<ColumnVector<UInt64> *>(key_to_request_column->assumeMutable().get());
UInt64 key_not_in_storage_value = std::numeric_limits<UInt64>::max();
ColumnPtr key_not_in_storage_default_value_column = ColumnVector<UInt64>::create(initial_keys_to_request.size(), key_not_in_storage_value);
if (hierarchical_attribute.is_nullable)
key_not_in_storage_default_value_column = makeNullable(key_not_in_storage_default_value_column);
PaddedPODArray<UInt64> & keys_to_request = key_to_request_column_typed->getData();
keys_to_request.assign(initial_keys_to_request);
PaddedPODArray<UInt64> next_keys_to_request;
HashSet<UInt64> already_requested_keys;
ChildToParentHierarchicalContext context;
if (hierarchical_attribute.is_nullable)
context.child_key_parent_key_is_null = HashSet<UInt64>();
HashMap<UInt64, UInt64> & child_key_to_parent_key = context.child_key_to_parent_key;
std::optional<HashSet<UInt64>> & child_key_parent_key_is_null = context.child_key_parent_key_is_null;
while (!keys_to_request.empty())
{
child_key_to_parent_key.reserve(keys_to_request.size());
auto hierarchical_attribute_parent_key_column = dictionary->getColumn(
hierarchical_attribute.name,
hierarchical_attribute.type,
{key_to_request_column},
{key_type},
key_not_in_storage_default_value_column);
const PaddedPODArray<UInt8> * in_key_column_nullable_mask = nullptr;
ColumnPtr parent_key_column_non_null = hierarchical_attribute_parent_key_column;
if (hierarchical_attribute_parent_key_column->isNullable())
{
const auto * parent_key_column_typed = assert_cast<const ColumnNullable *>(hierarchical_attribute_parent_key_column.get());
in_key_column_nullable_mask = &parent_key_column_typed->getNullMapData();
parent_key_column_non_null = parent_key_column_typed->getNestedColumnPtr();
}
const auto * parent_key_column_typed = checkAndGetColumn<ColumnVector<UInt64>>(*parent_key_column_non_null);
if (!parent_key_column_typed)
throw Exception(ErrorCodes::UNSUPPORTED_METHOD,
"Parent key column should be UInt64. Actual {}",
hierarchical_attribute.type->getName());
const auto & parent_keys = parent_key_column_typed->getData();
next_keys_to_request.clear();
size_t keys_to_request_size = keys_to_request.size();
for (size_t i = 0; i < keys_to_request_size; ++i)
{
auto child_key = keys_to_request[i];
auto parent_key = parent_keys[i];
if (unlikely(in_key_column_nullable_mask) && (*in_key_column_nullable_mask)[i])
{
child_key_parent_key_is_null->insert(child_key);
continue;
}
if (parent_key == key_not_in_storage_value)
continue;
child_key_to_parent_key[child_key] = parent_key;
if ((null_value && parent_key == *null_value) ||
already_requested_keys.find(parent_key) != nullptr)
continue;
already_requested_keys.insert(parent_key);
next_keys_to_request.emplace_back(parent_key);
}
keys_to_request.clear();
keys_to_request.assign(next_keys_to_request);
}
return context;
}
}
ColumnPtr getKeysDescendantsArray(
const PaddedPODArray<UInt64> & requested_keys,
const DictionaryHierarchicalParentToChildIndex & parent_to_child_index,
size_t level,
size_t & valid_keys)
{
if (level == 0)
{
detail::GetAllDescendantsStrategy strategy { .level = level };
auto elements_and_offsets = detail::getDescendants(requested_keys, parent_to_child_index, strategy, valid_keys);
return detail::convertElementsAndOffsetsIntoArray(std::move(elements_and_offsets));
}
else
{
detail::GetDescendantsAtSpecificLevelStrategy strategy { .level = level };
auto elements_and_offsets = detail::getDescendants(requested_keys, parent_to_child_index, strategy, valid_keys);
return detail::convertElementsAndOffsetsIntoArray(std::move(elements_and_offsets));
}
}
ColumnPtr getKeysHierarchyDefaultImplementation(
const IDictionary * dictionary,
ColumnPtr key_column,
const DataTypePtr & key_type,
size_t & valid_keys)
{
valid_keys = 0;
key_column = key_column->convertToFullColumnIfConst();
const auto * key_column_typed = checkAndGetColumn<ColumnVector<UInt64>>(*key_column);
if (!key_column_typed)
throw Exception(ErrorCodes::UNSUPPORTED_METHOD, "Key column should be UInt64");
const auto & dictionary_structure = dictionary->getStructure();
size_t hierarchical_attribute_index = *dictionary_structure.hierarchical_attribute_index;
const auto & hierarchical_attribute = dictionary_structure.attributes[hierarchical_attribute_index];
const PaddedPODArray<UInt64> & requested_keys = key_column_typed->getData();
ChildToParentHierarchicalContext child_to_parent_hierarchical_context
= getChildToParentHierarchicalContext(dictionary, hierarchical_attribute, requested_keys, key_type);
auto is_key_valid_func = [&](auto & key)
{
if (unlikely(child_to_parent_hierarchical_context.child_key_parent_key_is_null)
&& child_to_parent_hierarchical_context.child_key_parent_key_is_null->find(key))
return true;
return child_to_parent_hierarchical_context.child_key_to_parent_key.find(key) != nullptr;
};
std::optional<UInt64> null_value;
if (!hierarchical_attribute.null_value.isNull())
null_value = hierarchical_attribute.null_value.get<UInt64>();
auto get_parent_key_func = [&](auto & key)
{
std::optional<UInt64> result;
auto it = child_to_parent_hierarchical_context.child_key_to_parent_key.find(key);
if (it == nullptr)
return result;
UInt64 parent_key = it->getMapped();
if (null_value && parent_key == *null_value)
return result;
result = parent_key;
valid_keys += 1;
return result;
};
return getKeysHierarchyArray(requested_keys, is_key_valid_func, get_parent_key_func);
}
ColumnUInt8::Ptr getKeysIsInHierarchyDefaultImplementation(
const IDictionary * dictionary,
ColumnPtr key_column,
ColumnPtr in_key_column,
const DataTypePtr & key_type,
size_t & valid_keys)
{
valid_keys = 0;
key_column = key_column->convertToFullColumnIfConst();
in_key_column = in_key_column->convertToFullColumnIfConst();
const auto * key_column_typed = checkAndGetColumn<ColumnVector<UInt64>>(*key_column);
if (!key_column_typed)
throw Exception(ErrorCodes::UNSUPPORTED_METHOD, "Key column should be UInt64");
const auto * in_key_column_typed = checkAndGetColumn<ColumnVector<UInt64>>(*in_key_column);
if (!in_key_column_typed)
throw Exception(ErrorCodes::UNSUPPORTED_METHOD, "Key column should be UInt64");
const auto & dictionary_structure = dictionary->getStructure();
size_t hierarchical_attribute_index = *dictionary_structure.hierarchical_attribute_index;
const auto & hierarchical_attribute = dictionary_structure.attributes[hierarchical_attribute_index];
const PaddedPODArray<UInt64> & requested_keys = key_column_typed->getData();
ChildToParentHierarchicalContext child_to_parent_hierarchical_context
= getChildToParentHierarchicalContext(dictionary, hierarchical_attribute, requested_keys, key_type);
auto is_key_valid_func = [&](auto & key)
{
if (unlikely(child_to_parent_hierarchical_context.child_key_parent_key_is_null)
&& child_to_parent_hierarchical_context.child_key_parent_key_is_null->find(key))
return true;
return child_to_parent_hierarchical_context.child_key_to_parent_key.find(key) != nullptr;
};
std::optional<UInt64> null_value;
if (!hierarchical_attribute.null_value.isNull())
null_value = hierarchical_attribute.null_value.get<UInt64>();
auto get_parent_key_func = [&](auto & key)
{
std::optional<UInt64> result;
auto it = child_to_parent_hierarchical_context.child_key_to_parent_key.find(key);
if (it == nullptr)
return result;
UInt64 parent_key = it->getMapped();
if (null_value && parent_key == *null_value)
return result;
result = parent_key;
valid_keys += 1;
return result;
};
const auto & in_keys = in_key_column_typed->getData();
return getKeysIsInHierarchyColumn(requested_keys, in_keys, is_key_valid_func, get_parent_key_func);
}
}
|
