| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| |
| #ifndef IMPALA_EXPRS_CASE_EXPR_H_ |
| #define IMPALA_EXPRS_CASE_EXPR_H_ |
| |
| #include <string> |
| #include "scalar-expr.h" |
| |
| namespace impala { |
| |
| using impala_udf::FunctionContext; |
| using impala_udf::AnyVal; |
| using impala_udf::BooleanVal; |
| using impala_udf::TinyIntVal; |
| using impala_udf::SmallIntVal; |
| using impala_udf::IntVal; |
| using impala_udf::BigIntVal; |
| using impala_udf::FloatVal; |
| using impala_udf::DoubleVal; |
| using impala_udf::TimestampVal; |
| using impala_udf::StringVal; |
| using impala_udf::DecimalVal; |
| using impala_udf::DateVal; |
| |
| class ScalarExprEvaluator; |
| class TExprNode; |
| |
| class CaseExpr: public ScalarExpr { |
| public: |
| virtual Status GetCodegendComputeFnImpl(LlvmCodeGen* codegen, llvm::Function** fn) |
| override WARN_UNUSED_RESULT; |
| virtual std::string DebugString() const override; |
| |
| protected: |
| friend class ScalarExpr; |
| friend class ConditionalFunctions; |
| |
| virtual bool HasFnCtx() const override { return true; } |
| |
| CaseExpr(const TExprNode& node); |
| virtual Status OpenEvaluator(FunctionContext::FunctionStateScope scope, |
| RuntimeState* state, ScalarExprEvaluator* eval) |
| const override WARN_UNUSED_RESULT; |
| virtual void CloseEvaluator(FunctionContext::FunctionStateScope scope, |
| RuntimeState* state, ScalarExprEvaluator* eval) |
| const override; |
| |
| GENERATE_GET_VAL_INTERPRETED_OVERRIDES_FOR_ALL_SCALAR_TYPES |
| |
| bool has_case_expr() const { return has_case_expr_; } |
| bool has_else_expr() const { return has_else_expr_; } |
| |
| private: |
| const bool has_case_expr_; |
| const bool has_else_expr_; |
| |
| /// Populates 'dst' with the result of calling the appropriate Get*Val() function on the |
| /// specified child expr. |
| void GetChildVal(int child_idx, ScalarExprEvaluator* eval, |
| const TupleRow* row, AnyVal* dst) const; |
| |
| /// Return true iff *v1 == *v2. v1 and v2 should both be of the specified type. |
| bool AnyValEq(const ColumnType& type, const AnyVal* v1, const AnyVal* v2) const; |
| }; |
| |
| } |
| |
| #endif |