[GitHub] [druid] abhishekagarwal87 commented on a diff in pull request #12905: Convert the Druid planner to use statement handlers

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

abhishekagarwal87 commented on code in PR #12905:
URL: https://github.com/apache/druid/pull/12905#discussion_r968579033


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sql/src/main/java/org/apache/druid/sql/calcite/planner/IngestHandler.java:
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@@ -0,0 +1,346 @@
+/*
+ * 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.druid.sql.calcite.planner;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.Iterables;
+import org.apache.calcite.jdbc.CalciteSchema;
+import org.apache.calcite.rel.RelRoot;
+import org.apache.calcite.rel.type.RelDataType;
+import org.apache.calcite.rel.type.RelDataTypeFactory;
+import org.apache.calcite.sql.SqlExplain;
+import org.apache.calcite.sql.SqlIdentifier;
+import org.apache.calcite.sql.SqlInsert;
+import org.apache.calcite.sql.SqlKind;
+import org.apache.calcite.sql.SqlNode;
+import org.apache.calcite.sql.SqlNodeList;
+import org.apache.calcite.sql.SqlOrderBy;
+import org.apache.calcite.tools.ValidationException;
+import org.apache.calcite.util.Pair;
+import org.apache.druid.common.utils.IdUtils;
+import org.apache.druid.java.util.common.StringUtils;
+import org.apache.druid.java.util.common.granularity.Granularity;
+import org.apache.druid.server.security.Action;
+import org.apache.druid.server.security.Resource;
+import org.apache.druid.server.security.ResourceAction;
+import org.apache.druid.server.security.ResourceType;
+import org.apache.druid.sql.calcite.parser.DruidSqlIngest;
+import org.apache.druid.sql.calcite.parser.DruidSqlInsert;
+import org.apache.druid.sql.calcite.parser.DruidSqlParserUtils;
+import org.apache.druid.sql.calcite.parser.DruidSqlReplace;
+import org.apache.druid.sql.calcite.run.EngineFeature;
+import org.apache.druid.sql.calcite.run.QueryMaker;
+
+import java.util.List;
+import java.util.regex.Pattern;
+
+public abstract class IngestHandler extends QueryHandler
+{
+  private static final Pattern UNNAMED_COLUMN_PATTERN = Pattern.compile("^EXPR\\$\\d+$", Pattern.CASE_INSENSITIVE);
+  @VisibleForTesting
+  public static final String UNNAMED_INGESTION_COLUMN_ERROR =
+      "Cannot ingest expressions that do not have an alias "
+          + "or columns with names like EXPR$[digit].\n"
+          + "E.g. if you are ingesting \"func(X)\", then you can rewrite it as "
+          + "\"func(X) as myColumn\"";
+
+  protected final Granularity ingestionGranularity;
+  protected String targetDatasource;
+
+  IngestHandler(
+      HandlerContext handlerContext,
+      DruidSqlIngest insertNode,
+      SqlNode queryNode,
+      SqlExplain explain
+  )
+  {
+    super(handlerContext, queryNode, explain);
+    this.ingestionGranularity = insertNode.getPartitionedBy();
+  }
+
+  protected static SqlNode convertQuery(DruidSqlIngest sqlNode) throws ValidationException

Review Comment:
   Thanks for the explanation. btw I meant that the interval implementation of INSERT vs REPLACE can diverge (e.g. validation logic is a bit different, error messages thrown could be different, etc.) But I agree that code reuse is significant. 



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