| // 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_IS_NOT_EMPTY_PREDICATE_H_ |
| #define IMPALA_EXPRS_IS_NOT_EMPTY_PREDICATE_H_ |
| |
| #include "exprs/predicate.h" |
| |
| namespace impala { |
| |
| class ScalarExprEvaluator; |
| class TExprNode; |
| |
| /// Predicate that checks whether a collection is empty or not. |
| /// TODO: Implement this predicate via the UDF interface once the |
| /// interface supports CollectionVals. |
| class IsNotEmptyPredicate : public Predicate { |
| public: |
| static const char* LLVM_CLASS_NAME; |
| virtual Status GetCodegendComputeFnImpl( |
| LlvmCodeGen* codegen, llvm::Function** fn) override; |
| virtual BooleanVal GetBooleanValInterpreted( |
| ScalarExprEvaluator*, const TupleRow*) const override; |
| virtual std::string DebugString() const override; |
| |
| protected: |
| friend class ScalarExpr; |
| |
| virtual Status Init( |
| const RowDescriptor& row_desc, bool is_entry_point, RuntimeState* state) override; |
| explicit IsNotEmptyPredicate(const TExprNode& node); |
| }; |
| |
| } // namespace impala |
| |
| #endif |