[Enhancement] (nereids)implement showDeleteCommand in nereids

fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4

@@ -206,6 +206,7 @@ supportedShowStatement
     | SHOW AUTHORS                                                                  #showAuthors
     | SHOW DYNAMIC PARTITION TABLES ((FROM | IN) database=multipartIdentifier)?     #showDynamicPartition
     | SHOW LAST INSERT                                                              #showLastInsert 
+    | SHOW DELETE ((FROM | IN) database=multipartIdentifier)?                       #showDelete
     | SHOW ALL? GRANTS                                                              #showGrants
     | SHOW GRANTS FOR userIdentify                                                  #showGrantsForUser
     | SHOW VIEW
@@ -295,7 +296,6 @@ unsupportedShowStatement
         sortClause? limitClause?                                                    #showLoad
     | SHOW EXPORT ((FROM | IN) database=multipartIdentifier)? wildWhere?
         sortClause? limitClause?                                                    #showExport
-    | SHOW DELETE ((FROM | IN) database=multipartIdentifier)?                       #showDelete
     | SHOW ALTER TABLE (ROLLUP | (MATERIALIZED VIEW) | COLUMN)
         ((FROM | IN) database=multipartIdentifier)? wildWhere?
         sortClause? limitClause?                                                    #showAlterTable

fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java

@@ -208,6 +208,7 @@
 import org.apache.doris.nereids.DorisParser.ShowCreateMaterializedViewContext;
 import org.apache.doris.nereids.DorisParser.ShowCreateProcedureContext;
 import org.apache.doris.nereids.DorisParser.ShowCreateTableContext;
+import org.apache.doris.nereids.DorisParser.ShowDeleteContext;
 import org.apache.doris.nereids.DorisParser.ShowDynamicPartitionContext;
 import org.apache.doris.nereids.DorisParser.ShowFrontendsContext;
 import org.apache.doris.nereids.DorisParser.ShowGrantsContext;
@@ -472,6 +473,7 @@
 import org.apache.doris.nereids.trees.plans.commands.ShowCreateMaterializedViewCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowCreateProcedureCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowCreateTableCommand;
+import org.apache.doris.nereids.trees.plans.commands.ShowDeleteCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowDynamicPartitionCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowFrontendsCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowGrantsCommand;
@@ -4342,6 +4344,16 @@ public LogicalPlan visitShowTableId(ShowTableIdContext ctx) {
         return new ShowTableIdCommand(tableId);
     }
 
+    @Override
+    public LogicalPlan visitShowDelete(ShowDeleteContext ctx) {
+        String dbName = null;
+        if (ctx.database != null) {
+            List<String> nameParts = visitMultipartIdentifier(ctx.database);
+            dbName = nameParts.get(0); // only one entry possible
+        }
+        return new ShowDeleteCommand(dbName);
+    }
+
     @Override
     public LogicalPlan visitShowPrivileges(ShowPrivilegesContext ctx) {
         return new ShowPrivilegesCommand();

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/PlanType.java

@@ -189,6 +189,7 @@ public enum PlanType {
     SHOW_CREATE_CATALOG_COMMAND,
     SHOW_CREATE_MATERIALIZED_VIEW_COMMAND,
     SHOW_CREATE_TABLE_COMMAND,
+    SHOW_DELETE_COMMAND,
     SHOW_DYNAMIC_PARTITION_COMMAND,
     SHOW_FRONTENDS_COMMAND,
     SHOW_GRANTS_COMMAND,

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowDeleteCommand.java

@@ -0,0 +1,98 @@
+// 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.nereids.trees.plans.commands;
+
+import org.apache.doris.analysis.RedirectStatus;
+import org.apache.doris.catalog.Column;
+import org.apache.doris.catalog.Database;
+import org.apache.doris.catalog.Env;
+import org.apache.doris.catalog.ScalarType;
+import org.apache.doris.common.ErrorCode;
+import org.apache.doris.common.ErrorReport;
+import org.apache.doris.common.proc.DeleteInfoProcDir;
+import org.apache.doris.load.DeleteHandler;
+import org.apache.doris.nereids.trees.plans.PlanType;
+import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.qe.ShowResultSet;
+import org.apache.doris.qe.ShowResultSetMetaData;
+import org.apache.doris.qe.StmtExecutor;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.Lists;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * show delete command
+ */
+public class ShowDeleteCommand extends ShowCommand {
+    private String dbName; // if not given use current.
+
+    /**
+     * constructor
+     */
+    public ShowDeleteCommand(String dbName) {
+        super(PlanType.SHOW_DELETE_COMMAND);
+        this.dbName = dbName;
+    }
+
+    @Override
+    public ShowResultSet doRun(ConnectContext ctx, StmtExecutor executor) throws Exception {
+        if (Strings.isNullOrEmpty(dbName)) {
+            dbName = ctx.getDatabase();
+            if (Strings.isNullOrEmpty(dbName)) {
+                ErrorReport.reportAnalysisException(ErrorCode.ERR_NO_DB_ERROR);
+            }
+        }
+        Env env = Env.getCurrentEnv();
+        Database db = env.getInternalCatalog().getDbOrAnalysisException(dbName);
+        long dbId = db.getId();
+
+        DeleteHandler deleteHandler = env.getDeleteHandler();
+        List<List<Comparable>> deleteInfos = deleteHandler.getDeleteInfosByDb(dbId);
+        List<List<String>> rows = Lists.newArrayList();
+        for (List<Comparable> deleteInfo : deleteInfos) {
+            List<String> oneInfo = new ArrayList<String>(deleteInfo.size());
+            for (Comparable element : deleteInfo) {
+                oneInfo.add(element.toString());
+            }
+            rows.add(oneInfo);
+        }
+        return new ShowResultSet(getMetaData(), rows);
+    }
+
+    @Override
+    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
+        return visitor.visitShowDeleteCommand(this, context);
+    }
+
+    public ShowResultSetMetaData getMetaData() {
+        ShowResultSetMetaData.Builder builder = ShowResultSetMetaData.builder();
+        for (String title : DeleteInfoProcDir.TITLE_NAMES) {
+            builder.addColumn(new Column(title, ScalarType.createVarchar(30)));
+        }
+        return builder.build();
+    }
+
+    @Override
+    public RedirectStatus toRedirectStatus() {
+        return RedirectStatus.FORWARD_NO_SYNC;
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/visitor/CommandVisitor.java

@@ -68,6 +68,7 @@
 import org.apache.doris.nereids.trees.plans.commands.ShowCreateMaterializedViewCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowCreateProcedureCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowCreateTableCommand;
+import org.apache.doris.nereids.trees.plans.commands.ShowDeleteCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowDynamicPartitionCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowFrontendsCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowGrantsCommand;
@@ -406,6 +407,10 @@ default R visitShowTrashCommand(ShowTrashCommand showTrashCommand, C context) {
         return visitCommand(showTrashCommand, context);
     }
 
+    default R visitShowDeleteCommand(ShowDeleteCommand showDeleteCommand, C context) {
+        return visitCommand(showDeleteCommand, context);
+    }
+
     default R visitShowPrivilegesCommand(ShowPrivilegesCommand showPrivilegesCommand, C context) {
         return visitCommand(showPrivilegesCommand, context);
     }

regression-test/suites/auth_call/test_dml_delete_table_auth.groovy

@@ -59,7 +59,7 @@ suite("test_dml_delete_table_auth","p0,auth_call") {
             sql """DELETE FROM ${dbName}.${tableName} WHERE id = 3;"""
             exception "denied"
         }
-
+        checkNereidsExecute("show DELETE from ${dbName}")
         def del_res = sql """show DELETE from ${dbName}"""
         assertTrue(del_res.size() == 0)
     }

regression-test/suites/show_p0/test_show_delete.groovy

@@ -44,6 +44,7 @@ suite("test_show_delete") {
     // don't care nereids planner
     sql """ delete from ${tableName} PARTITION Mar  where type ='2'"""
     sql """ delete from ${tableName}   where type ='1'"""
+    checkNereidsExecute("show DELETE")
     def showDeleteResult = sql """ show delete"""
     //When we test locally, multiple history results will be included, so size will be >= 2
     assert showDeleteResult.size() >= 0