| // 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_SLOTREF_H |
| #define IMPALA_EXPRS_SLOTREF_H |
| |
| #include "exprs/scalar-expr.h" |
| #include "runtime/descriptors.h" |
| |
| namespace impala { |
| |
| 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; |
| |
| /// Reference to a single slot of a tuple. |
| class SlotRef : public ScalarExpr { |
| public: |
| SlotRef(const TExprNode& node); |
| SlotRef(const SlotDescriptor* desc); |
| |
| /// TODO: this is a hack to allow aggregation nodes to work around NULL slot |
| /// descriptors. Ideally the FE would dictate the type of the intermediate SlotRefs. |
| SlotRef(const SlotDescriptor* desc, const ColumnType& type); |
| |
| /// Used for testing. GetValue will return tuple + offset interpreted as 'type' |
| SlotRef(const ColumnType& type, int offset, const bool nullable = false); |
| |
| /// Exposed as public so AGG node can initialize its build expressions. |
| virtual Status Init(const RowDescriptor& row_desc, bool is_entry_point, |
| RuntimeState* state) override WARN_UNUSED_RESULT; |
| virtual std::string DebugString() const override; |
| virtual Status GetCodegendComputeFnImpl( |
| LlvmCodeGen* codegen, llvm::Function** fn) override WARN_UNUSED_RESULT; |
| virtual bool IsSlotRef() const override { return true; } |
| virtual int GetSlotIds(std::vector<SlotId>* slot_ids) const override; |
| const SlotId& slot_id() const { return slot_id_; } |
| static const char* LLVM_CLASS_NAME; |
| |
| protected: |
| friend class ScalarExpr; |
| friend class ScalarExprEvaluator; |
| |
| GENERATE_GET_VAL_INTERPRETED_OVERRIDES_FOR_ALL_SCALAR_TYPES |
| virtual CollectionVal GetCollectionValInterpreted( |
| ScalarExprEvaluator*, const TupleRow*) const override; |
| |
| private: |
| int tuple_idx_; // within row |
| int slot_offset_; // within tuple |
| NullIndicatorOffset null_indicator_offset_; // within tuple |
| const SlotId slot_id_; |
| bool tuple_is_nullable_; // true if the tuple is nullable. |
| }; |
| |
| } |
| |
| #endif |