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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 visitInValues(const Analyzer::InValues* in_values) const override {
54  const auto& value_list = in_values->get_value_list();
55  std::list<RetType> new_list;
56  for (const auto in_value : value_list) {
57  new_list.push_back(visit(in_value.get()));
58  }
59  return makeExpr<Analyzer::InValues>(visit(in_values->get_arg()), new_list);
60  }
61 
62  RetType visitInIntegerSet(const Analyzer::InIntegerSet* in_integer_set) const override {
63  return makeExpr<Analyzer::InIntegerSet>(
64  visit(in_integer_set->get_arg()),
65  in_integer_set->get_value_list(),
66  in_integer_set->get_type_info().get_notnull());
67  }
68 
70  return makeExpr<Analyzer::CharLengthExpr>(visit(char_length->get_arg()),
71  char_length->get_calc_encoded_length());
72  }
73 
75  return makeExpr<Analyzer::KeyForStringExpr>(visit(expr->get_arg()));
76  }
77 
78  RetType visitLower(const Analyzer::LowerExpr* expr) const override {
79  return makeExpr<Analyzer::LowerExpr>(visit(expr->get_arg()));
80  }
81 
82  RetType visitCardinality(const Analyzer::CardinalityExpr* cardinality) const override {
83  return makeExpr<Analyzer::CardinalityExpr>(visit(cardinality->get_arg()));
84  }
85 
86  RetType visitLikeExpr(const Analyzer::LikeExpr* like) const override {
87  auto escape_expr = like->get_escape_expr();
88  return makeExpr<Analyzer::LikeExpr>(visit(like->get_arg()),
89  visit(like->get_like_expr()),
90  escape_expr ? visit(escape_expr) : nullptr,
91  like->get_is_ilike(),
92  like->get_is_simple());
93  }
94 
95  RetType visitRegexpExpr(const Analyzer::RegexpExpr* regexp) const override {
96  auto escape_expr = regexp->get_escape_expr();
97  return makeExpr<Analyzer::RegexpExpr>(visit(regexp->get_arg()),
98  visit(regexp->get_pattern_expr()),
99  escape_expr ? visit(escape_expr) : nullptr);
100  }
101 
102  RetType visitCaseExpr(const Analyzer::CaseExpr* case_expr) const override {
103  std::list<std::pair<RetType, RetType>> new_list;
104  for (auto p : case_expr->get_expr_pair_list()) {
105  new_list.emplace_back(visit(p.first.get()), visit(p.second.get()));
106  }
107  auto else_expr = case_expr->get_else_expr();
108  return makeExpr<Analyzer::CaseExpr>(
109  case_expr->get_type_info(),
110  case_expr->get_contains_agg(),
111  new_list,
112  else_expr == nullptr ? nullptr : visit(else_expr));
113  }
114 
115  RetType visitDatetruncExpr(const Analyzer::DatetruncExpr* datetrunc) const override {
116  return makeExpr<Analyzer::DatetruncExpr>(datetrunc->get_type_info(),
117  datetrunc->get_contains_agg(),
118  datetrunc->get_field(),
119  visit(datetrunc->get_from_expr()));
120  }
121 
122  RetType visitExtractExpr(const Analyzer::ExtractExpr* extract) const override {
123  return makeExpr<Analyzer::ExtractExpr>(extract->get_type_info(),
124  extract->get_contains_agg(),
125  extract->get_field(),
126  visit(extract->get_from_expr()));
127  }
128 
129  RetType visitArrayOper(const Analyzer::ArrayExpr* array_expr) const override {
130  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
131  for (size_t i = 0; i < array_expr->getElementCount(); ++i) {
132  args_copy.push_back(visit(array_expr->getElement(i)));
133  }
134  const auto& type_info = array_expr->get_type_info();
135  return makeExpr<Analyzer::ArrayExpr>(
136  type_info, args_copy, array_expr->getExprIndex(), array_expr->isLocalAlloc());
137  }
138 
139  RetType visitGeoExpr(const Analyzer::GeoExpr* geo_expr) const override {
140  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
141  for (const auto& arg : geo_expr->getArgs()) {
142  args_copy.push_back(visit(arg.get()));
143  }
144  const auto& type_info = geo_expr->get_type_info();
145  return makeExpr<Analyzer::GeoExpr>(type_info, args_copy);
146  }
147 
149  const Analyzer::WindowFunction* window_func) const override {
150  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
151  for (const auto& arg : window_func->getArgs()) {
152  args_copy.push_back(visit(arg.get()));
153  }
154  std::vector<std::shared_ptr<Analyzer::Expr>> partition_keys_copy;
155  for (const auto& partition_key : window_func->getPartitionKeys()) {
156  partition_keys_copy.push_back(visit(partition_key.get()));
157  }
158  std::vector<std::shared_ptr<Analyzer::Expr>> order_keys_copy;
159  for (const auto& order_key : window_func->getOrderKeys()) {
160  order_keys_copy.push_back(visit(order_key.get()));
161  }
162  const auto& type_info = window_func->get_type_info();
163  return makeExpr<Analyzer::WindowFunction>(type_info,
164  window_func->getKind(),
165  args_copy,
166  partition_keys_copy,
167  order_keys_copy,
168  window_func->getCollation());
169  }
170 
171  RetType visitFunctionOper(const Analyzer::FunctionOper* func_oper) const override {
172  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
173  for (size_t i = 0; i < func_oper->getArity(); ++i) {
174  args_copy.push_back(visit(func_oper->getArg(i)));
175  }
176  const auto& type_info = func_oper->get_type_info();
177  return makeExpr<Analyzer::FunctionOper>(type_info, func_oper->getName(), args_copy);
178  }
179 
180  RetType visitDatediffExpr(const Analyzer::DatediffExpr* datediff) const override {
181  return makeExpr<Analyzer::DatediffExpr>(datediff->get_type_info(),
182  datediff->get_field(),
183  visit(datediff->get_start_expr()),
184  visit(datediff->get_end_expr()));
185  }
186 
187  RetType visitDateaddExpr(const Analyzer::DateaddExpr* dateadd) const override {
188  return makeExpr<Analyzer::DateaddExpr>(dateadd->get_type_info(),
189  dateadd->get_field(),
190  visit(dateadd->get_number_expr()),
191  visit(dateadd->get_datetime_expr()));
192  }
193 
195  const Analyzer::FunctionOperWithCustomTypeHandling* func_oper) const override {
196  std::vector<std::shared_ptr<Analyzer::Expr>> args_copy;
197  for (size_t i = 0; i < func_oper->getArity(); ++i) {
198  args_copy.push_back(visit(func_oper->getArg(i)));
199  }
200  const auto& type_info = func_oper->get_type_info();
201  return makeExpr<Analyzer::FunctionOperWithCustomTypeHandling>(
202  type_info, func_oper->getName(), args_copy);
203  }
204 
205  RetType visitLikelihood(const Analyzer::LikelihoodExpr* likelihood) const override {
206  return makeExpr<Analyzer::LikelihoodExpr>(visit(likelihood->get_arg()),
207  likelihood->get_likelihood());
208  }
209 
210  RetType visitAggExpr(const Analyzer::AggExpr* agg) const override {
211  RetType arg = agg->get_arg() ? visit(agg->get_arg()) : nullptr;
212  return makeExpr<Analyzer::AggExpr>(agg->get_type_info(),
213  agg->get_aggtype(),
214  arg,
215  agg->get_is_distinct(),
216  agg->get_error_rate());
217  }
218 
220  return makeExpr<Analyzer::OffsetInFragment>();
221  }
222 };
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:984
SqlWindowFunctionKind getKind() const
Definition: Analyzer.h:1396
const Expr * get_from_expr() const
Definition: Analyzer.h:1146
const Expr * get_else_expr() const
Definition: Analyzer.h:1101
RetType visitVar(const Analyzer::Var *var) const override
const std::vector< int64_t > & get_value_list() const
Definition: Analyzer.h:629
const Expr * get_escape_expr() const
Definition: Analyzer.h:857
size_t getArity() const
Definition: Analyzer.h:1309
int32_t getExprIndex() const
Definition: Analyzer.h:1438
RetType visitFunctionOper(const Analyzer::FunctionOper *func_oper) const override
RetType visitConstant(const Analyzer::Constant *constant) const override
const std::vector< std::shared_ptr< Analyzer::Expr > > & getArgs() const
Definition: Analyzer.h:1473
std::shared_ptr< Analyzer::Constant > get_error_rate() const
Definition: Analyzer.h:1048
ExtractField get_field() const
Definition: Analyzer.h:1145
const Expr * get_escape_expr() const
Definition: Analyzer.h:929
const Expr * get_right_operand() const
Definition: Analyzer.h:437
RetType visitDatetruncExpr(const Analyzer::DatetruncExpr *datetrunc) const override
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:80
RetType visitArrayOper(const Analyzer::ArrayExpr *array_expr) const override
bool get_contains_agg() const
Definition: Analyzer.h:80
const Expr * get_arg() const
Definition: Analyzer.h:926
Expr * get_arg() const
Definition: Analyzer.h:1045
DatetruncField get_field() const
Definition: Analyzer.h:1270
const Expr * get_arg() const
Definition: Analyzer.h:982
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:59
std::shared_ptr< Analyzer::Expr > visit(const Analyzer::Expr *expr) const
const std::vector< std::shared_ptr< Analyzer::Expr > > & getOrderKeys() const
Definition: Analyzer.h:1404
const std::vector< OrderEntry > & getCollation() const
Definition: Analyzer.h:1408
std::shared_ptr< Analyzer::Expr > RetType
const Expr * get_arg() const
Definition: Analyzer.h:854
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:69
bool get_calc_encoded_length() const
Definition: Analyzer.h:652
SQLOps get_optype() const
Definition: Analyzer.h:433
RetType visitLikeExpr(const Analyzer::LikeExpr *like) const override
RetType visitOffsetInFragment(const Analyzer::OffsetInFragment *) const override
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:1398
RetType visitCardinality(const Analyzer::CardinalityExpr *cardinality) const override
RetType visitLikelihood(const Analyzer::LikelihoodExpr *likelihood) const override
RetType visitKeyForString(const Analyzer::KeyForStringExpr *expr) const override
HOST DEVICE bool get_notnull() const
Definition: sqltypes.h:333
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:859
bool get_is_distinct() const
Definition: Analyzer.h:1047
const Expr * get_start_expr() const
Definition: Analyzer.h:1229
const SQLTypeInfo & get_type_info() const
Definition: Analyzer.h:78
size_t getElementCount() const
Definition: Analyzer.h:1437
const Expr * get_pattern_expr() const
Definition: Analyzer.h:928
const Expr * get_from_expr() const
Definition: Analyzer.h:1271
const Expr * get_datetime_expr() const
Definition: Analyzer.h:1188
bool isLocalAlloc() const
Definition: Analyzer.h:1439
const Expr * get_like_expr() const
Definition: Analyzer.h:856
const Analyzer::Expr * getArg(const size_t i) const
Definition: Analyzer.h:1311
RetType visitUOper(const Analyzer::UOper *uoper) const override
const Expr * get_operand() const
Definition: Analyzer.h:365
RetType visitCharLength(const Analyzer::CharLengthExpr *char_length) const override
const Expr * get_arg() const
Definition: Analyzer.h:650
const std::list< std::shared_ptr< Analyzer::Expr > > & get_value_list() const
Definition: Analyzer.h:580
Expression class for the LOWER (lowercase) string function. The &quot;arg&quot; constructor parameter must be a...
Definition: Analyzer.h:740
DateaddField get_field() const
Definition: Analyzer.h:1186
SQLAgg get_aggtype() const
Definition: Analyzer.h:1044
const Expr * get_arg() const
Definition: Analyzer.h:699
const Expr * get_end_expr() const
Definition: Analyzer.h:1230
RetType visitCaseExpr(const Analyzer::CaseExpr *case_expr) const override
const Expr * get_left_operand() const
Definition: Analyzer.h:436
RetType visitInIntegerSet(const Analyzer::InIntegerSet *in_integer_set) 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
std::string getName() const
Definition: Analyzer.h:1307
RetType visitDatediffExpr(const Analyzer::DatediffExpr *datediff) const override
const Expr * get_arg() const
Definition: Analyzer.h:627
const std::vector< std::shared_ptr< Analyzer::Expr > > & getPartitionKeys() const
Definition: Analyzer.h:1400
const Expr * get_arg() const
Definition: Analyzer.h:800
DatetruncField get_field() const
Definition: Analyzer.h:1228
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:84
const Expr * get_arg() const
Definition: Analyzer.h:578
RetType visitDateaddExpr(const Analyzer::DateaddExpr *dateadd) const override
SQLOps get_optype() const
Definition: Analyzer.h:364
const std::list< std::pair< std::shared_ptr< Analyzer::Expr >, std::shared_ptr< Analyzer::Expr > > > & get_expr_pair_list() const
Definition: Analyzer.h:1098
const Expr * get_arg() const
Definition: Analyzer.h:744
RetType visitWindowFunction(const Analyzer::WindowFunction *window_func) const override
const Expr * get_number_expr() const
Definition: Analyzer.h:1187
bool get_is_ilike() const
Definition: Analyzer.h:858
RetType visitLower(const Analyzer::LowerExpr *expr) const override
const Analyzer::Expr * getElement(const size_t i) const
Definition: Analyzer.h:1441
SQLQualifier get_qualifier() const
Definition: Analyzer.h:435
RetType visitColumnVar(const Analyzer::ColumnVar *col_var) const override