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DeepCopyVisitor.h
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1 /*
2  * Copyright 2017 MapD Technologies, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "ScalarExprVisitor.h"
18 
19 class DeepCopyVisitor : public ScalarExprVisitor<std::shared_ptr<Analyzer::Expr>> {
20  protected:
21  using RetType = std::shared_ptr<Analyzer::Expr>;
22  RetType visitColumnVar(const Analyzer::ColumnVar* col_var) const override {
23  return col_var->deep_copy();
24  }
25 
27  const Analyzer::ExpressionTuple* col_var_tuple) const override {
28  return col_var_tuple->deep_copy();
29  }
30 
31  RetType visitVar(const Analyzer::Var* var) const override { return var->deep_copy(); }
32 
33  RetType visitConstant(const Analyzer::Constant* constant) const override {
34  return constant->deep_copy();
35  }
36 
37  RetType visitUOper(const Analyzer::UOper* uoper) const override {
38  return makeExpr<Analyzer::UOper>(uoper->get_type_info(),
39  uoper->get_contains_agg(),
40  uoper->get_optype(),
41  visit(uoper->get_operand()));
42  }
43 
44  RetType visitBinOper(const Analyzer::BinOper* bin_oper) const override {
45  return makeExpr<Analyzer::BinOper>(bin_oper->get_type_info(),
46  bin_oper->get_contains_agg(),
47  bin_oper->get_optype(),
48  bin_oper->get_qualifier(),
49  visit(bin_oper->get_left_operand()),
50  visit(bin_oper->get_right_operand()));
51  }
52 
53  RetType visitGeoExpr(const Analyzer::GeoExpr* geo_expr) const override {
54  return geo_expr->deep_copy();
55  }
56 
57  RetType visitInValues(const Analyzer::InValues* in_values) const override {
58  const auto& value_list = in_values->get_value_list();
59  std::list<RetType> new_list;
60  for (const auto& in_value : value_list) {
61  new_list.push_back(visit(in_value.get()));
62  }
63  return makeExpr<Analyzer::InValues>(visit(in_values->get_arg()), new_list);
64  }
65 
66  RetType visitInIntegerSet(const Analyzer::InIntegerSet* in_integer_set) const override {
67  return makeExpr<Analyzer::InIntegerSet>(
68  visit(in_integer_set->get_arg()),
69  in_integer_set->get_value_list(),
70  in_integer_set->get_type_info().get_notnull());
71  }
72 
74  return makeExpr<Analyzer::CharLengthExpr>(visit(char_length->get_arg()),
75  char_length->get_calc_encoded_length());
76  }
77 
79  return makeExpr<Analyzer::KeyForStringExpr>(visit(expr->get_arg()));
80  }
81 
82  RetType visitSampleRatio(const Analyzer::SampleRatioExpr* expr) const override {
83  return makeExpr<Analyzer::SampleRatioExpr>(visit(expr->get_arg()));
84  }
85 
86  RetType visitLower(const Analyzer::LowerExpr* expr) const override {
87  return makeExpr<Analyzer::LowerExpr>(visit(expr->get_arg()));
88  }
89 
90  RetType visitCardinality(const Analyzer::CardinalityExpr* cardinality) const override {
91  return makeExpr<Analyzer::CardinalityExpr>(visit(cardinality->get_arg()));
92  }
93 
94  RetType visitLikeExpr(const Analyzer::LikeExpr* like) const override {
95  auto escape_expr = like->get_escape_expr();
96  return makeExpr<Analyzer::LikeExpr>(visit(like->get_arg()),
97  visit(like->get_like_expr()),
98  escape_expr ? visit(escape_expr) : nullptr,
99  like->get_is_ilike(),
100  like->get_is_simple());
101  }
102 
103  RetType visitRegexpExpr(const Analyzer::RegexpExpr* regexp) const override {
104  auto escape_expr = regexp->get_escape_expr();
105  return makeExpr<Analyzer::RegexpExpr>(visit(regexp->get_arg()),
106  visit(regexp->get_pattern_expr()),
107  escape_expr ? visit(escape_expr) : nullptr);
108  }
109 
111  const Analyzer::WidthBucketExpr* width_bucket_expr) const override {
112  return makeExpr<Analyzer::WidthBucketExpr>(
113  visit(width_bucket_expr->get_target_value()),
114  visit(width_bucket_expr->get_lower_bound()),
115  visit(width_bucket_expr->get_upper_bound()),
116  visit(width_bucket_expr->get_partition_count()));
117  }
118 
119  RetType visitCaseExpr(const Analyzer::CaseExpr* case_expr) const override {
120  std::list<std::pair<RetType, RetType>> new_list;
121  for (auto p : case_expr->get_expr_pair_list()) {
122  new_list.emplace_back(visit(p.first.get()), visit(p.second.get()));
123  }
124  auto else_expr = case_expr->get_else_expr();
125  return makeExpr<Analyzer::CaseExpr>(
126  case_expr->get_type_info(),
127  case_expr->get_contains_agg(),
128  new_list,
129  else_expr == nullptr ? nullptr : visit(else_expr));
130  }
131 
132  RetType visitDatetruncExpr(const Analyzer::DatetruncExpr* datetrunc) const override {
133  return makeExpr<Analyzer::DatetruncExpr>(datetrunc->get_type_info(),
134  datetrunc->get_contains_agg(),
135  datetrunc->get_field(),
136  visit(datetrunc->get_from_expr()));
137  }
138 
139  RetType visitExtractExpr(const Analyzer::ExtractExpr* extract) const override {
140  return makeExpr<Analyzer::ExtractExpr>(extract->get_type_info(),
141  extract->get_contains_agg(),
142  extract->get_field(),
143  visit(extract->get_from_expr()));
144  }
145 
146  RetType visitArrayOper(const Analyzer::ArrayExpr* array_expr) const override {
147  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
148  for (size_t i = 0; i < array_expr->getElementCount(); ++i) {
149  args_copy.push_back(visit(array_expr->getElement(i)));
150  }
151  const auto& type_info = array_expr->get_type_info();
152  return makeExpr<Analyzer::ArrayExpr>(
153  type_info, args_copy, array_expr->isNull(), array_expr->isLocalAlloc());
154  }
155 
156  RetType visitGeoUOper(const Analyzer::GeoUOper* geo_expr) const override {
157  std::vector<std::shared_ptr<Analyzer::Expr>> args0_copy;
158  for (const auto& arg : geo_expr->getArgs0()) {
159  args0_copy.push_back(visit(arg.get()));
160  }
161  const auto& ti0 = geo_expr->getTypeInfo0();
162  const auto& type_info = geo_expr->get_type_info();
163  return makeExpr<Analyzer::GeoUOper>(geo_expr->getOp(), type_info, ti0, args0_copy);
164  }
165 
166  RetType visitGeoBinOper(const Analyzer::GeoBinOper* geo_expr) const override {
167  std::vector<std::shared_ptr<Analyzer::Expr>> args0_copy;
168  for (const auto& arg : geo_expr->getArgs0()) {
169  args0_copy.push_back(visit(arg.get()));
170  }
171  std::vector<std::shared_ptr<Analyzer::Expr>> args1_copy;
172  for (const auto& arg : geo_expr->getArgs1()) {
173  args1_copy.push_back(visit(arg.get()));
174  }
175  const auto& ti0 = geo_expr->getTypeInfo0();
176  const auto& ti1 = geo_expr->getTypeInfo1();
177  const auto& type_info = geo_expr->get_type_info();
178  return makeExpr<Analyzer::GeoBinOper>(
179  geo_expr->getOp(), type_info, ti0, ti1, args0_copy, args1_copy);
180  }
181 
183  const Analyzer::WindowFunction* window_func) const override {
184  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
185  for (const auto& arg : window_func->getArgs()) {
186  args_copy.push_back(visit(arg.get()));
187  }
188  std::vector<std::shared_ptr<Analyzer::Expr>> partition_keys_copy;
189  for (const auto& partition_key : window_func->getPartitionKeys()) {
190  partition_keys_copy.push_back(visit(partition_key.get()));
191  }
192  std::vector<std::shared_ptr<Analyzer::Expr>> order_keys_copy;
193  for (const auto& order_key : window_func->getOrderKeys()) {
194  order_keys_copy.push_back(visit(order_key.get()));
195  }
196  const auto& type_info = window_func->get_type_info();
197  return makeExpr<Analyzer::WindowFunction>(type_info,
198  window_func->getKind(),
199  args_copy,
200  partition_keys_copy,
201  order_keys_copy,
202  window_func->getCollation());
203  }
204 
205  RetType visitFunctionOper(const Analyzer::FunctionOper* func_oper) const override {
206  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
207  for (size_t i = 0; i < func_oper->getArity(); ++i) {
208  args_copy.push_back(visit(func_oper->getArg(i)));
209  }
210  const auto& type_info = func_oper->get_type_info();
211  return makeExpr<Analyzer::FunctionOper>(type_info, func_oper->getName(), args_copy);
212  }
213 
214  RetType visitDatediffExpr(const Analyzer::DatediffExpr* datediff) const override {
215  return makeExpr<Analyzer::DatediffExpr>(datediff->get_type_info(),
216  datediff->get_field(),
217  visit(datediff->get_start_expr()),
218  visit(datediff->get_end_expr()));
219  }
220 
221  RetType visitDateaddExpr(const Analyzer::DateaddExpr* dateadd) const override {
222  return makeExpr<Analyzer::DateaddExpr>(dateadd->get_type_info(),
223  dateadd->get_field(),
224  visit(dateadd->get_number_expr()),
225  visit(dateadd->get_datetime_expr()));
226  }
227 
229  const Analyzer::FunctionOperWithCustomTypeHandling* func_oper) const override {
230  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
231  for (size_t i = 0; i < func_oper->getArity(); ++i) {
232  args_copy.push_back(visit(func_oper->getArg(i)));
233  }
234  const auto& type_info = func_oper->get_type_info();
235  return makeExpr<Analyzer::FunctionOperWithCustomTypeHandling>(
236  type_info, func_oper->getName(), args_copy);
237  }
238 
239  RetType visitLikelihood(const Analyzer::LikelihoodExpr* likelihood) const override {
240  return makeExpr<Analyzer::LikelihoodExpr>(visit(likelihood->get_arg()),
241  likelihood->get_likelihood());
242  }
243 
244  RetType visitAggExpr(const Analyzer::AggExpr* agg) const override {
245  RetType arg = agg->get_arg() ? visit(agg->get_arg()) : nullptr;
246  return makeExpr<Analyzer::AggExpr>(agg->get_type_info(),
247  agg->get_aggtype(),
248  arg,
249  agg->get_is_distinct(),
250  agg->get_arg1());
251  }
252 
254  return makeExpr<Analyzer::OffsetInFragment>();
255  }
256 };
RetType visitColumnVarTuple(const Analyzer::ExpressionTuple *col_var_tuple) const override
RetType visitInValues(const Analyzer::InValues *in_values) const override
float get_likelihood() const
Definition: Analyzer.h:1189
SqlWindowFunctionKind getKind() const
Definition: Analyzer.h:1607
const Expr * get_from_expr() const
Definition: Analyzer.h:1352
const Expr * get_partition_count() const
Definition: Analyzer.h:1091
const Expr * get_else_expr() const
Definition: Analyzer.h:1307
const SQLTypeInfo getTypeInfo0() const
Definition: Analyzer.h:1716
RetType visitVar(const Analyzer::Var *var) const override
const std::vector< std::shared_ptr< Analyzer::Expr > > & getArgs0() const
Definition: Analyzer.h:1718
const std::vector< int64_t > & get_value_list() const
Definition: Analyzer.h:681
const Expr * get_escape_expr() const
Definition: Analyzer.h:954
size_t getArity() const
Definition: Analyzer.h:1515
const SQLTypeInfo getTypeInfo0() const
Definition: Analyzer.h:1687
RetType visitFunctionOper(const Analyzer::FunctionOper *func_oper) const override
RetType visitConstant(const Analyzer::Constant *constant) const override
ExtractField get_field() const
Definition: Analyzer.h:1351
const Expr * get_escape_expr() const
Definition: Analyzer.h:1026
const Expr * get_right_operand() const
Definition: Analyzer.h:442
RetType visitDatetruncExpr(const Analyzer::DatetruncExpr *datetrunc) const override
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:81
RetType visitArrayOper(const Analyzer::ArrayExpr *array_expr) const override
bool get_contains_agg() const
Definition: Analyzer.h:79
RetType visitWidthBucket(const Analyzer::WidthBucketExpr *width_bucket_expr) const override
const SQLTypeInfo getTypeInfo1() const
Definition: Analyzer.h:1717
const Expr * get_arg() const
Definition: Analyzer.h:1023
Expr * get_arg() const
Definition: Analyzer.h:1250
DatetruncField get_field() const
Definition: Analyzer.h:1476
const Expr * get_arg() const
Definition: Analyzer.h:1187
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:60
std::shared_ptr< Analyzer::Expr > visit(const Analyzer::Expr *expr) const
bool isNull() const
Definition: Analyzer.h:1650
const std::vector< std::shared_ptr< Analyzer::Expr > > & getOrderKeys() const
Definition: Analyzer.h:1615
const std::vector< OrderEntry > & getCollation() const
Definition: Analyzer.h:1619
std::shared_ptr< Analyzer::Expr > RetType
const Expr * get_arg() const
Definition: Analyzer.h:951
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:70
bool get_calc_encoded_length() const
Definition: Analyzer.h:704
RetType visitGeoUOper(const Analyzer::GeoUOper *geo_expr) const override
SQLOps get_optype() const
Definition: Analyzer.h:438
RetType visitLikeExpr(const Analyzer::LikeExpr *like) const override
RetType visitOffsetInFragment(const Analyzer::OffsetInFragment *) const override
std::shared_ptr< Analyzer::Constant > get_arg1() const
Definition: Analyzer.h:1253
RetType visitExtractExpr(const Analyzer::ExtractExpr *extract) const override
ALWAYS_INLINE DEVICE int32_t char_length(const char *str, const int32_t str_len)
const std::vector< std::shared_ptr< Analyzer::Expr > > & getArgs() const
Definition: Analyzer.h:1609
RetType visitCardinality(const Analyzer::CardinalityExpr *cardinality) const override
RetType visitLikelihood(const Analyzer::LikelihoodExpr *likelihood) const override
const std::vector< std::shared_ptr< Analyzer::Expr > > & getArgs0() const
Definition: Analyzer.h:1688
RetType visitKeyForString(const Analyzer::KeyForStringExpr *expr) const override
RetType visitAggExpr(const Analyzer::AggExpr *agg) const override
RetType visitFunctionOperWithCustomTypeHandling(const Analyzer::FunctionOperWithCustomTypeHandling *func_oper) const override
bool get_is_simple() const
Definition: Analyzer.h:956
bool get_is_distinct() const
Definition: Analyzer.h:1252
const Expr * get_start_expr() const
Definition: Analyzer.h:1435
const SQLTypeInfo & get_type_info() const
Definition: Analyzer.h:77
size_t getElementCount() const
Definition: Analyzer.h:1648
const Expr * get_pattern_expr() const
Definition: Analyzer.h:1025
const Expr * get_from_expr() const
Definition: Analyzer.h:1477
const Expr * get_datetime_expr() const
Definition: Analyzer.h:1394
bool isLocalAlloc() const
Definition: Analyzer.h:1649
const Expr * get_like_expr() const
Definition: Analyzer.h:953
const Analyzer::Expr * getArg(const size_t i) const
Definition: Analyzer.h:1517
RetType visitUOper(const Analyzer::UOper *uoper) const override
const Expr * get_operand() const
Definition: Analyzer.h:370
const Expr * get_arg() const
Definition: Analyzer.h:796
RetType visitCharLength(const Analyzer::CharLengthExpr *char_length) const override
const Expr * get_arg() const
Definition: Analyzer.h:702
const std::list< std::shared_ptr< Analyzer::Expr > > & get_value_list() const
Definition: Analyzer.h:632
Expression class for the LOWER (lowercase) string function. The &quot;arg&quot; constructor parameter must be a...
Definition: Analyzer.h:837
virtual std::shared_ptr< Analyzer::Expr > deep_copy() const =0
DateaddField get_field() const
Definition: Analyzer.h:1392
SQLAgg get_aggtype() const
Definition: Analyzer.h:1249
const Expr * get_target_value() const
Definition: Analyzer.h:1088
const Expr * get_arg() const
Definition: Analyzer.h:751
const Expr * get_end_expr() const
Definition: Analyzer.h:1436
Geospatial::GeoBase::GeoOp getOp() const
Definition: Analyzer.h:1686
RetType visitCaseExpr(const Analyzer::CaseExpr *case_expr) const override
const Expr * get_left_operand() const
Definition: Analyzer.h:441
RetType visitInIntegerSet(const Analyzer::InIntegerSet *in_integer_set) const override
RetType visitSampleRatio(const Analyzer::SampleRatioExpr *expr) const override
RetType visitBinOper(const Analyzer::BinOper *bin_oper) const override
RetType visitGeoExpr(const Analyzer::GeoExpr *geo_expr) const override
RetType visitRegexpExpr(const Analyzer::RegexpExpr *regexp) const override
const Expr * get_lower_bound() const
Definition: Analyzer.h:1089
std::string getName() const
Definition: Analyzer.h:1513
RetType visitDatediffExpr(const Analyzer::DatediffExpr *datediff) const override
const Expr * get_arg() const
Definition: Analyzer.h:679
HOST DEVICE bool get_notnull() const
Definition: sqltypes.h:336
const Expr * get_upper_bound() const
Definition: Analyzer.h:1090
const std::vector< std::shared_ptr< Analyzer::Expr > > & getPartitionKeys() const
Definition: Analyzer.h:1611
const Expr * get_arg() const
Definition: Analyzer.h:897
RetType visitGeoBinOper(const Analyzer::GeoBinOper *geo_expr) const override
DatetruncField get_field() const
Definition: Analyzer.h:1434
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:85
Geospatial::GeoBase::GeoOp getOp() const
Definition: Analyzer.h:1715
const Expr * get_arg() const
Definition: Analyzer.h:630
RetType visitDateaddExpr(const Analyzer::DateaddExpr *dateadd) const override
SQLOps get_optype() const
Definition: Analyzer.h:369
const std::vector< std::shared_ptr< Analyzer::Expr > > & getArgs1() const
Definition: Analyzer.h:1719
ALWAYS_INLINE DEVICE double width_bucket_expr(const double target_value, const bool reversed, const double lower_bound, const double upper_bound, const int32_t partition_count)
const std::list< std::pair< std::shared_ptr< Analyzer::Expr >, std::shared_ptr< Analyzer::Expr > > > & get_expr_pair_list() const
Definition: Analyzer.h:1304
const Expr * get_arg() const
Definition: Analyzer.h:841
RetType visitWindowFunction(const Analyzer::WindowFunction *window_func) const override
const Expr * get_number_expr() const
Definition: Analyzer.h:1393
bool get_is_ilike() const
Definition: Analyzer.h:955
RetType visitLower(const Analyzer::LowerExpr *expr) const override
const Analyzer::Expr * getElement(const size_t i) const
Definition: Analyzer.h:1652
SQLQualifier get_qualifier() const
Definition: Analyzer.h:440
RetType visitColumnVar(const Analyzer::ColumnVar *col_var) const override