[GitHub] [incubator-doris] xinghuayu007 commented on a change in pull request #5436: [FEATURE]Check date type to avoid scan all partitions

[GitBox <gi...@apache.org>]

xinghuayu007 commented on a change in pull request #5436:
URL: https://github.com/apache/incubator-doris/pull/5436#discussion_r588985930



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File path: fe/fe-core/src/main/java/org/apache/doris/rewrite/BinaryPredicatesDateRule.java
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@@ -0,0 +1,50 @@
+// 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.doris.rewrite;
+
+import org.apache.doris.analysis.Analyzer;
+import org.apache.doris.analysis.BinaryPredicate;
+import org.apache.doris.analysis.CastExpr;
+import org.apache.doris.analysis.Expr;
+import org.apache.doris.analysis.BoolLiteral;
+import org.apache.doris.common.AnalysisException;
+
+/**
+ * Binary predicate date rule try to convert date expression, if date is invalid, it will be
+ * converted into bool literal to avoid to scan all partitions
+ * Examples:
+ * date = "2020-10-32" => FALSE
+ */
+public class BinaryPredicatesDateRule implements ExprRewriteRule {
+    public static ExprRewriteRule INSTANCE = new BinaryPredicatesDateRule();
+
+    @Override
+    public Expr apply(Expr expr, Analyzer analyzer) throws AnalysisException {
+        if (!(expr instanceof BinaryPredicate)) return expr;
+        Expr lchild = expr.getChild(0);
+        if (!lchild.getType().isDateType()) {
+            return expr;
+        }
+        Expr valueExpr = expr.getChild(1);
+        if(valueExpr.getType().isDateType() && valueExpr.isConstant()
+                && valueExpr instanceof CastExpr) {
+            return new BoolLiteral(false);

Review comment:
       In Classs DateLiteral, FE uses joda time library to parse a date value. FE only supports 'yyyy-MM-dd hh:mm:ss' && 'yyyy-MM-dd' format, so if FE unchecked cast fail, it also builds CastExpr for BE. Therefore, if a Expr is CastExpr, it should be invalid date value.




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