[Feat] (Nereids)support showTrash Command

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

@@ -222,6 +222,7 @@
 import org.apache.doris.nereids.DorisParser.ShowStorageEnginesContext;
 import org.apache.doris.nereids.DorisParser.ShowTableIdContext;
 import org.apache.doris.nereids.DorisParser.ShowTabletsBelongContext;
+import org.apache.doris.nereids.DorisParser.ShowTrashContext;
 import org.apache.doris.nereids.DorisParser.ShowVariablesContext;
 import org.apache.doris.nereids.DorisParser.ShowViewContext;
 import org.apache.doris.nereids.DorisParser.ShowWhitelistContext;
@@ -478,6 +479,7 @@
 import org.apache.doris.nereids.trees.plans.commands.ShowStorageEnginesCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowTableIdCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowTabletsBelongCommand;
+import org.apache.doris.nereids.trees.plans.commands.ShowTrashCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowVariablesCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowViewCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowWhiteListCommand;
@@ -4070,6 +4072,11 @@ public SetDefaultStorageVaultCommand visitSetDefaultStorageVault(SetDefaultStora
         return new SetDefaultStorageVaultCommand(stripQuotes(ctx.identifier().getText()));
     }
 
+    @Override
+    public LogicalPlan visitShowTrash(ShowTrashContext ctx) {
+        return new ShowTrashCommand();
+    }
+
     @Override
     public Object visitRefreshCatalog(RefreshCatalogContext ctx) {
         if (ctx.name != null) {

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

@@ -195,6 +195,7 @@ public enum PlanType {
     SHOW_ROLE_COMMAND,
     SHOW_STORAGE_ENGINES_COMMAND,
     SHOW_TABLE_ID_COMMAND,
+    SHOW_TRASH_COMMAND,
     SHOW_VARIABLES_COMMAND,
     SHOW_AUTHORS_COMMAND,
     SHOW_VIEW_COMMAND,

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

@@ -0,0 +1,78 @@
+// 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.catalog.Column;
+import org.apache.doris.catalog.Env;
+import org.apache.doris.catalog.ScalarType;
+import org.apache.doris.common.proc.TrashProcDir;
+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 org.apache.doris.system.Backend;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+
+import java.util.List;
+
+/**
+ * show trash command
+ */
+public class ShowTrashCommand extends ShowCommand {
+    private List<Backend> backends = Lists.newArrayList();
+
+    public ShowTrashCommand() {
+        super(PlanType.SHOW_TRASH_COMMAND);
+    }
+
+    public List<Backend> getBackends() {
+        return backends;
+    }
+
+    public ShowResultSetMetaData getMetaData() {
+        ShowResultSetMetaData.Builder builder = ShowResultSetMetaData.builder();
+        for (String title : TrashProcDir.TITLE_NAMES) {
+            builder.addColumn(new Column(title, ScalarType.createVarchar(30)));
+        }
+        return builder.build();
+    }
+
+    private ShowResultSet handleShowTrash() throws Exception {
+        ImmutableMap<Long, Backend> backendsInfo = Env.getCurrentSystemInfo().getAllBackendsByAllCluster();
+        for (Backend backend : backendsInfo.values()) {
+            this.backends.add(backend);
+        }
+        List<List<String>> infos = Lists.newArrayList();
+        TrashProcDir.getTrashInfo(backends, infos);
+        return new ShowResultSet(getMetaData(), infos);
+    }
+
+    @Override
+    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
+        return visitor.visitShowTrashCommand(this, context);
+    }
+
+    @Override
+    public ShowResultSet doRun(ConnectContext ctx, StmtExecutor executor) throws Exception {
+        return handleShowTrash();
+    }
+}

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

@@ -76,6 +76,7 @@
 import org.apache.doris.nereids.trees.plans.commands.ShowStorageEnginesCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowTableIdCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowTabletsBelongCommand;
+import org.apache.doris.nereids.trees.plans.commands.ShowTrashCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowVariablesCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowViewCommand;
 import org.apache.doris.nereids.trees.plans.commands.ShowWhiteListCommand;
@@ -366,6 +367,10 @@ default R visitShowTableIdCommand(ShowTableIdCommand showTableIdCommand, C conte
         return visitCommand(showTableIdCommand, context);
     }
 
+    default R visitShowTrashCommand(ShowTrashCommand showTrashCommand, C context) {
+        return visitCommand(showTrashCommand, context);
+    }
+
     default R visitShowPrivilegesCommand(ShowPrivilegesCommand showPrivilegesCommand, C context) {
         return visitCommand(showPrivilegesCommand, context);
     }

regression-test/suites/nereids_p0/ddl/show_trash/test_nereids_trash.groovy

@@ -0,0 +1,22 @@
+// 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.
+
+suite("show_trash_nereids") {
+    // can not use qt command since the output change based on cluster and backend ip
+    checkNereidsExecute("""show trash;""")
+    checkNereidsExecute("""show trash on "127.0.0.1:9050";""")
+}