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Posted to dev@drill.apache.org by GitBox <gi...@apache.org> on 2020/04/26 18:38:00 UTC
[GitHub] [drill] akkapur commented on a change in pull request #1888: DRILL-5956: Add Storage Plugin for Apache Druid
akkapur commented on a change in pull request #1888:
URL: https://github.com/apache/drill/pull/1888#discussion_r415372488
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File path: contrib/storage-druid/src/main/java/org/apache/drill/exec/store/druid/DruidCompareFunctionProcessor.java
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@@ -0,0 +1,256 @@
+/*
+ * 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.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 org.apache.drill.shaded.guava.com.google.common.collect.ImmutableMap;
+import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableSet;
+
+public class DruidCompareFunctionProcessor extends
+ AbstractExprVisitor<Boolean, LogicalExpression, RuntimeException> {
+
+ private Object value;
+ private boolean success;
+ private boolean isEqualityFn;
+ private SchemaPath path;
+ private String functionName;
+
+ public static boolean isCompareFunction(String functionName) {
+ return COMPARE_FUNCTIONS_TRANSPOSE_MAP.keySet().contains(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() == 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("isnotnull", "isnotnull")
+ .put("isNotNull", "isNotNull")
+ .put("is not null", "is not null")
+ .put("isnull", "isnull")
+ .put("isNull", "isNull")
+ .put("is null", "is null")
+ // binary functions
+ .put("equal", "equal").put("not_equal", "not_equal")
+ .put("greater_than_or_equal_to", "less_than_or_equal_to")
+ .put("greater_than", "less_than")
+ .put("less_than_or_equal_to", "greater_than_or_equal_to")
+ .put("less_than", "greater_than")
+ .put("like", "like")
+ .put("LIKE", "like").build();
Review comment:
Fixed
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