| /* |
| * 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.store.druid; |
| |
| import org.apache.drill.common.FunctionNames; |
| import org.apache.drill.common.expression.CastExpression; |
| import org.apache.drill.common.expression.ConvertExpression; |
| import org.apache.drill.common.expression.FunctionCall; |
| import org.apache.drill.common.expression.LogicalExpression; |
| import org.apache.drill.common.expression.SchemaPath; |
| import org.apache.drill.common.expression.visitors.AbstractExprVisitor; |
| import org.apache.drill.common.expression.ValueExpressions.BooleanExpression; |
| import org.apache.drill.common.expression.ValueExpressions.DateExpression; |
| import org.apache.drill.common.expression.ValueExpressions.DoubleExpression; |
| import org.apache.drill.common.expression.ValueExpressions.FloatExpression; |
| import org.apache.drill.common.expression.ValueExpressions.IntExpression; |
| import org.apache.drill.common.expression.ValueExpressions.LongExpression; |
| import org.apache.drill.common.expression.ValueExpressions.QuotedString; |
| import org.apache.drill.common.expression.ValueExpressions.TimeExpression; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| |
| public class DruidCompareFunctionProcessor extends |
| AbstractExprVisitor<Boolean, LogicalExpression, RuntimeException> { |
| |
| private Object value; |
| private boolean success; |
| private final boolean isEqualityFn; |
| private SchemaPath path; |
| private String functionName; |
| |
| public static boolean isCompareFunction(String functionName) { |
| return COMPARE_FUNCTIONS_TRANSPOSE_MAP.containsKey(functionName); |
| } |
| |
| public static DruidCompareFunctionProcessor process(FunctionCall call) { |
| String functionName = call.getName(); |
| LogicalExpression nameArg = call.args().get(0); |
| LogicalExpression valueArg = call.args().size() == 2 ? call.args().get(1) |
| : null; |
| DruidCompareFunctionProcessor evaluator = |
| new DruidCompareFunctionProcessor(functionName); |
| |
| if (valueArg != null) { // binary function |
| if (VALUE_EXPRESSION_CLASSES.contains(nameArg.getClass())) { |
| LogicalExpression swapArg = valueArg; |
| valueArg = nameArg; |
| nameArg = swapArg; |
| evaluator.functionName = |
| COMPARE_FUNCTIONS_TRANSPOSE_MAP.get(functionName); |
| } |
| evaluator.success = nameArg.accept(evaluator, valueArg); |
| } else if (call.args().get(0) instanceof SchemaPath) { |
| evaluator.success = true; |
| evaluator.path = (SchemaPath) nameArg; |
| } |
| |
| return evaluator; |
| } |
| |
| public DruidCompareFunctionProcessor(String functionName) { |
| this.success = false; |
| this.functionName = functionName; |
| this.isEqualityFn = COMPARE_FUNCTIONS_TRANSPOSE_MAP |
| .containsKey(functionName) |
| && COMPARE_FUNCTIONS_TRANSPOSE_MAP.get(functionName).equals( |
| functionName); |
| } |
| |
| public Object getValue() { |
| return value; |
| } |
| |
| public boolean isSuccess() { |
| return success; |
| } |
| |
| public SchemaPath getPath() { |
| return path; |
| } |
| |
| public String getFunctionName() { |
| return functionName; |
| } |
| |
| @Override |
| public Boolean visitCastExpression(CastExpression e, |
| LogicalExpression valueArg) throws RuntimeException { |
| if (e.getInput() instanceof CastExpression |
| || e.getInput() instanceof SchemaPath) { |
| return e.getInput().accept(this, valueArg); |
| } |
| return false; |
| } |
| |
| @Override |
| public Boolean visitConvertExpression(ConvertExpression e, |
| LogicalExpression valueArg) throws RuntimeException { |
| if (e.getConvertFunction().equals(ConvertExpression.CONVERT_FROM) |
| && e.getInput() instanceof SchemaPath) { |
| String encodingType = e.getEncodingType(); |
| switch (encodingType) { |
| case "INT_BE": |
| case "INT": |
| case "UINT_BE": |
| case "UINT": |
| case "UINT4_BE": |
| case "UINT4": |
| if (valueArg instanceof IntExpression |
| && (isEqualityFn || encodingType.startsWith("U"))) { |
| this.value = ((IntExpression) valueArg).getInt(); |
| } |
| break; |
| case "BIGINT_BE": |
| case "BIGINT": |
| case "UINT8_BE": |
| case "UINT8": |
| if (valueArg instanceof LongExpression |
| && (isEqualityFn || encodingType.startsWith("U"))) { |
| this.value = ((LongExpression) valueArg).getLong(); |
| } |
| break; |
| case "FLOAT": |
| if (valueArg instanceof FloatExpression && isEqualityFn) { |
| this.value = ((FloatExpression) valueArg).getFloat(); |
| } |
| break; |
| case "DOUBLE": |
| if (valueArg instanceof DoubleExpression && isEqualityFn) { |
| this.value = ((DoubleExpression) valueArg).getDouble(); |
| } |
| break; |
| case "TIME_EPOCH": |
| case "TIME_EPOCH_BE": |
| if (valueArg instanceof TimeExpression) { |
| this.value = ((TimeExpression) valueArg).getTime(); |
| } |
| break; |
| case "DATE_EPOCH": |
| case "DATE_EPOCH_BE": |
| if (valueArg instanceof DateExpression) { |
| this.value = ((DateExpression) valueArg).getDate(); |
| } |
| break; |
| case "BOOLEAN_BYTE": |
| if (valueArg instanceof BooleanExpression) { |
| this.value = ((BooleanExpression) valueArg).getBoolean(); |
| } |
| break; |
| case "UTF8": |
| // let visitSchemaPath() handle this. |
| return e.getInput().accept(this, valueArg); |
| } |
| |
| if (value != null) { |
| this.path = (SchemaPath) e.getInput(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public Boolean visitUnknown(LogicalExpression e, LogicalExpression valueArg) |
| throws RuntimeException { |
| return false; |
| } |
| |
| @Override |
| public Boolean visitSchemaPath(SchemaPath path, LogicalExpression valueArg) |
| throws RuntimeException { |
| if (valueArg instanceof QuotedString) { |
| this.value = ((QuotedString) valueArg).value; |
| this.path = path; |
| return true; |
| } |
| |
| if (valueArg instanceof IntExpression) { |
| this.value = ((IntExpression) valueArg).getInt(); |
| this.path = path; |
| return true; |
| } |
| |
| if (valueArg instanceof LongExpression) { |
| this.value = ((LongExpression) valueArg).getLong(); |
| this.path = path; |
| return true; |
| } |
| |
| if (valueArg instanceof FloatExpression) { |
| this.value = ((FloatExpression) valueArg).getFloat(); |
| this.path = path; |
| return true; |
| } |
| |
| if (valueArg instanceof DoubleExpression) { |
| this.value = ((DoubleExpression) valueArg).getDouble(); |
| this.path = path; |
| return true; |
| } |
| |
| if (valueArg instanceof BooleanExpression) { |
| this.value = ((BooleanExpression) valueArg).getBoolean(); |
| this.path = path; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| private static final ImmutableSet<Class<? extends LogicalExpression>> VALUE_EXPRESSION_CLASSES; |
| static { |
| ImmutableSet.Builder<Class<? extends LogicalExpression>> builder = ImmutableSet.builder(); |
| VALUE_EXPRESSION_CLASSES = builder.add(BooleanExpression.class) |
| .add(DateExpression.class).add(DoubleExpression.class) |
| .add(FloatExpression.class).add(IntExpression.class) |
| .add(LongExpression.class).add(QuotedString.class) |
| .add(TimeExpression.class).build(); |
| } |
| |
| private static final ImmutableMap<String, String> COMPARE_FUNCTIONS_TRANSPOSE_MAP; |
| static { |
| ImmutableMap.Builder<String, String> builder = ImmutableMap.builder(); |
| COMPARE_FUNCTIONS_TRANSPOSE_MAP = builder |
| // unary functions |
| .put(FunctionNames.IS_NOT_NULL, FunctionNames.IS_NOT_NULL) |
| .put("isNotNull", "isNotNull") |
| .put("is not null", "is not null") |
| .put(FunctionNames.IS_NULL, FunctionNames.IS_NULL) |
| .put("isNull", "isNull") |
| .put("is null", "is null") |
| // binary functions |
| .put(FunctionNames.EQ, FunctionNames.EQ) |
| .put(FunctionNames.NE, FunctionNames.NE) |
| .put(FunctionNames.LIKE, FunctionNames.LIKE) |
| .put(FunctionNames.GE, FunctionNames.LE) |
| .put(FunctionNames.GT, FunctionNames.LT) |
| .put(FunctionNames.LE, FunctionNames.GE) |
| .put(FunctionNames.LT, FunctionNames.GT).build(); |
| } |
| } |