| // 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_VALID_TUPLE_ID_H_ |
| #define IMPALA_EXPRS_VALID_TUPLE_ID_H_ |
| |
| #include "exprs/scalar-expr.h" |
| |
| namespace impala { |
| |
| class TExprNode; |
| |
| /// Returns the tuple id of the single non-NULL tuple in the input row. |
| /// Valid input rows must have exactly one non-NULL tuple. |
| class ValidTupleIdExpr : public ScalarExpr { |
| public: |
| static const char* LLVM_CLASS_NAME; |
| |
| protected: |
| friend class ScalarExpr; |
| |
| explicit ValidTupleIdExpr(const TExprNode& node); |
| |
| virtual Status Init( |
| const RowDescriptor& row_desc, bool is_entry_point, RuntimeState* state) override; |
| virtual Status GetCodegendComputeFnImpl( |
| LlvmCodeGen* codegen, llvm::Function** fn) override WARN_UNUSED_RESULT; |
| virtual std::string DebugString() const override; |
| |
| virtual IntVal GetIntValInterpreted( |
| ScalarExprEvaluator*, const TupleRow*) const override; |
| |
| private: |
| /// Maps from tuple index in the row to its corresponding tuple id. |
| std::vector<TupleId> tuple_ids_; |
| |
| /// Returns the number of tuples in 'row' that are non-null. Used for debugging. |
| static int ComputeNonNullCount(const TupleRow* row, int num_tuples); |
| |
| /// Returns true if the tuple of the row at the specified index is non-null. |
| /// Called by Codegen. |
| static bool IsTupleFromRowNonNull(const TupleRow* row, int index); |
| }; |
| |
| } // namespace impala |
| |
| #endif |