conditional-functions.cc

Go to the documentation of this file.

// Copyright 2012 Cloudera Inc.
//
// Licensed 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.

#include "exprs/conditional-functions.h"
#include "runtime/runtime-state.h"
#include "udf/udf.h"

#include "common/names.h"

using namespace impala;
using namespace impala_udf;

#define CONDITIONAL_CODEGEN_FN(expr_class) \
  Status expr_class::GetCodegendComputeFn(RuntimeState* state, llvm::Function** fn) { \
    return GetCodegendComputeFnWrapper(state, fn); \
  }

CONDITIONAL_CODEGEN_FN(IsNullExpr);
CONDITIONAL_CODEGEN_FN(NullIfExpr);
CONDITIONAL_CODEGEN_FN(IfExpr);
CONDITIONAL_CODEGEN_FN(CoalesceExpr);

BooleanVal ConditionalFunctions::IsFalse(FunctionContext* ctx, const BooleanVal& val) {
  if (val.is_null) return BooleanVal(false);
  return BooleanVal(!val.val);
}

BooleanVal ConditionalFunctions::IsNotFalse(FunctionContext* ctx, const BooleanVal& val) {
  if (val.is_null) return BooleanVal(true);
  return BooleanVal(val.val);
}

BooleanVal ConditionalFunctions::IsTrue(FunctionContext* ctx, const BooleanVal& val) {
  if (val.is_null) return BooleanVal(false);
  return BooleanVal(val.val);
}

BooleanVal ConditionalFunctions::IsNotTrue(FunctionContext* ctx, const BooleanVal& val) {
  if (val.is_null) return BooleanVal(true);
  return BooleanVal(!val.val);
}