| /* |
| * 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. |
| */ |
| package org.apache.drill.exec.expr.fn.impl; |
| |
| import java.text.DecimalFormat; |
| |
| import org.apache.drill.exec.expr.DrillSimpleFunc; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate.FunctionScope; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling; |
| import org.apache.drill.exec.expr.annotations.Output; |
| import org.apache.drill.exec.expr.annotations.Param; |
| import org.apache.drill.exec.expr.annotations.Workspace; |
| import org.apache.drill.exec.expr.holders.BigIntHolder; |
| import org.apache.drill.exec.expr.holders.Float8Holder; |
| import org.apache.drill.exec.expr.holders.NullableFloat8Holder; |
| import org.apache.drill.exec.expr.holders.NullableVarCharHolder; |
| import org.apache.drill.exec.expr.holders.VarCharHolder; |
| |
| public class MathFunctions { |
| |
| @FunctionTemplate(name = "power", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL) |
| public static class Power implements DrillSimpleFunc{ |
| |
| @Param Float8Holder a; |
| @Param Float8Holder b; |
| @Output Float8Holder out; |
| |
| public void setup(){} |
| |
| public void eval(){ |
| out.value = java.lang.Math.pow(a.value, b.value); |
| } |
| |
| } |
| |
| @FunctionTemplate(name = "random", isRandom = true, |
| scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL) |
| public static class Random implements DrillSimpleFunc{ |
| @Output Float8Holder out; |
| |
| public void setup(){} |
| |
| public void eval(){ |
| out.value = java.lang.Math.random(); |
| } |
| } |
| |
| @FunctionTemplate(name = "rand", isRandom = true, |
| scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL) |
| public static class RandomWithoutSeed implements DrillSimpleFunc{ |
| @Output Float8Holder out; |
| |
| public void setup(){} |
| |
| public void eval(){ |
| out.value = java.lang.Math.random(); |
| } |
| } |
| |
| @FunctionTemplate(name = "rand", isRandom = true, |
| scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL) |
| public static class RandomWithSeed implements DrillSimpleFunc{ |
| @Param BigIntHolder seed; |
| @Workspace java.util.Random rand; |
| @Output Float8Holder out; |
| |
| public void setup(){ |
| rand = new java.util.Random(seed.value); |
| } |
| |
| public void eval(){ |
| out.value = rand.nextDouble(); |
| } |
| } |
| |
| @FunctionTemplate(name = "to_number", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL) |
| public static class ToNumber implements DrillSimpleFunc { |
| @Param VarCharHolder left; |
| @Param VarCharHolder right; |
| @Workspace java.text.DecimalFormat inputFormat; |
| @Workspace int decimalDigits; |
| @Output Float8Holder out; |
| |
| @Override |
| public void setup() { |
| byte[] buf = new byte[right.end - right.start]; |
| right.buffer.getBytes(right.start, buf, 0, right.end - right.start); |
| inputFormat = new DecimalFormat(new String(buf)); |
| decimalDigits = inputFormat.getMaximumFractionDigits(); |
| } |
| |
| @Override |
| public void eval() { |
| byte[] buf1 = new byte[left.end - left.start]; |
| left.buffer.getBytes(left.start, buf1, 0, left.end - left.start); |
| String input = new String(buf1); |
| try { |
| out.value = inputFormat.parse(input).doubleValue(); |
| } catch (java.text.ParseException e) { |
| throw new UnsupportedOperationException("Cannot parse input: " + input + " with pattern : " + inputFormat.toPattern()); |
| } |
| |
| // Round the value |
| java.math.BigDecimal roundedValue = new java.math.BigDecimal(out.value); |
| out.value = (roundedValue.setScale(decimalDigits, java.math.BigDecimal.ROUND_HALF_UP)).doubleValue(); |
| } |
| } |
| |
| @FunctionTemplate(name = "convertVarCharToNumber", scope = FunctionScope.SIMPLE, isInternal = true) |
| public static class ToNullableNumber implements DrillSimpleFunc { |
| @Param |
| VarCharHolder left; |
| @Param |
| VarCharHolder right; |
| @Workspace |
| java.text.DecimalFormat inputFormat; |
| @Workspace |
| int decimalDigits; |
| @Output |
| NullableFloat8Holder out; |
| |
| @Override |
| public void setup() { |
| byte[] buf = new byte[right.end - right.start]; |
| right.buffer.getBytes(right.start, buf, 0, right.end - right.start); |
| inputFormat = new DecimalFormat(new String(buf)); |
| decimalDigits = inputFormat.getMaximumFractionDigits(); |
| } |
| |
| @Override |
| public void eval() { |
| if (left.start == left.end) { |
| out.isSet = 0; |
| return; |
| } |
| out.isSet = 1; |
| |
| byte[] buf1 = new byte[left.end - left.start]; |
| left.buffer.getBytes(left.start, buf1, 0, left.end - left.start); |
| String input = new String(buf1); |
| try { |
| out.value = inputFormat.parse(input).doubleValue(); |
| } catch (java.text.ParseException e) { |
| throw new UnsupportedOperationException("Cannot parse input: " + input + " with pattern : " + inputFormat.toPattern()); |
| } |
| |
| // Round the value |
| java.math.BigDecimal roundedValue = new java.math.BigDecimal(out.value); |
| out.value = (roundedValue.setScale(decimalDigits, java.math.BigDecimal.ROUND_HALF_UP)).doubleValue(); |
| } |
| } |
| |
| @FunctionTemplate(name = "convertNullableVarCharToNumber", scope = FunctionScope.SIMPLE, isInternal = true) |
| public static class ToNullableNumberNullableInput implements DrillSimpleFunc { |
| @Param |
| NullableVarCharHolder left; |
| @Param |
| VarCharHolder right; |
| @Workspace |
| java.text.DecimalFormat inputFormat; |
| @Workspace |
| int decimalDigits; |
| @Output |
| NullableFloat8Holder out; |
| |
| @Override |
| public void setup() { |
| byte[] buf = new byte[right.end - right.start]; |
| right.buffer.getBytes(right.start, buf, 0, right.end - right.start); |
| inputFormat = new DecimalFormat(new String(buf)); |
| decimalDigits = inputFormat.getMaximumFractionDigits(); |
| } |
| |
| @Override |
| public void eval() { |
| if (left.isSet == 0 || left.start == left.end) { |
| out.isSet = 0; |
| return; |
| } |
| out.isSet = 1; |
| |
| byte[] buf1 = new byte[left.end - left.start]; |
| left.buffer.getBytes(left.start, buf1, 0, left.end - left.start); |
| String input = new String(buf1); |
| try { |
| out.value = inputFormat.parse(input).doubleValue(); |
| } catch (java.text.ParseException e) { |
| throw new UnsupportedOperationException("Cannot parse input: " + input + " with pattern : " + inputFormat.toPattern()); |
| } |
| |
| // Round the value |
| java.math.BigDecimal roundedValue = new java.math.BigDecimal(out.value); |
| out.value = (roundedValue.setScale(decimalDigits, java.math.BigDecimal.ROUND_HALF_UP)).doubleValue(); |
| } |
| } |
| |
| @FunctionTemplate(name = "pi", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL) |
| public static class Pi implements DrillSimpleFunc { |
| |
| @Output Float8Holder out; |
| |
| public void setup() { |
| } |
| |
| public void eval() { |
| out.value = java.lang.Math.PI; |
| } |
| } |
| |
| } |