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new cf5dd303275 [Enhancement] (nereids)implement showBackendsCommand in
nereids (#43121)
cf5dd303275 is described below
commit cf5dd303275d212e26721efdb1c77120631fa5ed
Author: Vallish Pai <vallish...@gmail.com>
AuthorDate: Mon Nov 18 14:31:51 2024 +0530
[Enhancement] (nereids)implement showBackendsCommand in nereids (#43121)
Issue Number: close #42762
---
.../antlr4/org/apache/doris/nereids/DorisParser.g4 | 2 +-
.../doris/nereids/parser/LogicalPlanBuilder.java | 7 ++
.../apache/doris/nereids/trees/plans/PlanType.java | 1 +
.../trees/plans/commands/ShowBackendsCommand.java | 94 ++++++++++++++++++++++
.../trees/plans/visitor/CommandVisitor.java | 5 ++
.../show/test_nereids_showbackends.groovy | 22 +++++
6 files changed, 130 insertions(+), 1 deletion(-)
diff --git a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
index c92afb1c6ea..b816b312194 100644
--- a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
+++ b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
@@ -208,6 +208,7 @@ supportedShowStatement
| SHOW STORAGE? ENGINES
#showStorageEngines
| SHOW CREATE MATERIALIZED VIEW mvName=identifier
ON tableName=multipartIdentifier
#showCreateMaterializedView
+ | SHOW BACKENDS
#showBackends
| SHOW FRONTENDS name=identifier?
#showFrontends
;
@@ -304,7 +305,6 @@ unsupportedShowStatement
| SHOW BROKER
#showBroker
| SHOW RESOURCES wildWhere? sortClause? limitClause?
#showResources
| SHOW WORKLOAD GROUPS wildWhere?
#showWorkloadGroups
- | SHOW BACKENDS
#showBackends
| SHOW TRASH (ON backend=STRING_LITERAL)?
#showTrash
| SHOW SNAPSHOT ON repo=identifier wildWhere?
#showSnapshot
| SHOW ALL? GRANTS
#showGrants
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
index 4fe061b5468..59ae207a696 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
@@ -195,6 +195,7 @@ import
org.apache.doris.nereids.DorisParser.SetUserPropertiesContext;
import org.apache.doris.nereids.DorisParser.SetUserVariableContext;
import org.apache.doris.nereids.DorisParser.SetVariableWithTypeContext;
import org.apache.doris.nereids.DorisParser.ShowAuthorsContext;
+import org.apache.doris.nereids.DorisParser.ShowBackendsContext;
import org.apache.doris.nereids.DorisParser.ShowConfigContext;
import org.apache.doris.nereids.DorisParser.ShowConstraintContext;
import org.apache.doris.nereids.DorisParser.ShowCreateMTMVContext;
@@ -437,6 +438,7 @@ import
org.apache.doris.nereids.trees.plans.commands.SetOptionsCommand;
import org.apache.doris.nereids.trees.plans.commands.SetTransactionCommand;
import org.apache.doris.nereids.trees.plans.commands.SetUserPropertiesCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowAuthorsCommand;
+import org.apache.doris.nereids.trees.plans.commands.ShowBackendsCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowConfigCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowConstraintsCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowCreateMTMVCommand;
@@ -4085,6 +4087,11 @@ public class LogicalPlanBuilder extends
DorisParserBaseVisitor<Object> {
return new ShowViewCommand(databaseName, new
TableNameInfo(tableNameParts));
}
+ @Override
+ public LogicalPlan visitShowBackends(ShowBackendsContext ctx) {
+ return new ShowBackendsCommand();
+ }
+
@Override
public LogicalPlan visitShowRepositories(ShowRepositoriesContext ctx) {
return new ShowRepositoriesCommand();
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/PlanType.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/PlanType.java
index 576bd734a04..768ef8ca723 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/PlanType.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/PlanType.java
@@ -176,6 +176,7 @@ public enum PlanType {
SET_DEFAULT_STORAGE_VAULT_COMMAND,
PREPARED_COMMAND,
EXECUTE_COMMAND,
+ SHOW_BACKENDS_COMMAND,
SHOW_CONFIG_COMMAND,
SHOW_CREATE_MATERIALIZED_VIEW_COMMAND,
SHOW_FRONTENDS_COMMAND,
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowBackendsCommand.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowBackendsCommand.java
new file mode 100644
index 00000000000..9119e8490f4
--- /dev/null
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowBackendsCommand.java
@@ -0,0 +1,94 @@
+// 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.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.BackendsProcDir;
+import org.apache.doris.mysql.privilege.PrivPredicate;
+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.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * show backends command
+ */
+public class ShowBackendsCommand extends ShowCommand {
+ public static final Logger LOG =
LogManager.getLogger(ShowBackendsCommand.class);
+
+ /**
+ * constructor
+ */
+ public ShowBackendsCommand() {
+ super(PlanType.SHOW_BACKENDS_COMMAND);
+ }
+
+ public ShowResultSetMetaData getMetaData() {
+ ShowResultSetMetaData.Builder builder =
ShowResultSetMetaData.builder();
+ for (String title : BackendsProcDir.TITLE_NAMES) {
+ builder.addColumn(new Column(title, ScalarType.createVarchar(30)));
+ }
+ return builder.build();
+ }
+
+ @Override
+ public ShowResultSet doRun(ConnectContext ctx, StmtExecutor executor)
throws Exception {
+ if
(!Env.getCurrentEnv().getAccessManager().checkGlobalPriv(ConnectContext.get(),
PrivPredicate.ADMIN)
+ &&
!Env.getCurrentEnv().getAccessManager().checkGlobalPriv(ConnectContext.get(),
+
PrivPredicate.OPERATOR)) {
+
ErrorReport.reportAnalysisException(ErrorCode.ERR_SPECIFIC_ACCESS_DENIED_ERROR,
"ADMIN/OPERATOR");
+ }
+
+ List<List<String>> backendInfos = BackendsProcDir.getBackendInfos();
+ backendInfos.sort(new Comparator<List<String>>() {
+ @Override
+ public int compare(List<String> o1, List<String> o2) {
+ return Long.compare(Long.parseLong(o1.get(0)),
Long.parseLong(o2.get(0)));
+ }
+ });
+
+ return new ShowResultSet(getMetaData(), backendInfos);
+ }
+
+ @Override
+ public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
+ return visitor.visitShowBackendsCommand(this, context);
+ }
+
+ @Override
+ public RedirectStatus toRedirectStatus() {
+ if (ConnectContext.get().getSessionVariable().getForwardToMaster()) {
+ return RedirectStatus.FORWARD_NO_SYNC;
+ } else {
+ return RedirectStatus.NO_FORWARD;
+ }
+ }
+}
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/visitor/CommandVisitor.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/visitor/CommandVisitor.java
index 421fdeb4c24..3b5ee877e8b 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/visitor/CommandVisitor.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/visitor/CommandVisitor.java
@@ -51,6 +51,7 @@ import
org.apache.doris.nereids.trees.plans.commands.SetOptionsCommand;
import org.apache.doris.nereids.trees.plans.commands.SetTransactionCommand;
import org.apache.doris.nereids.trees.plans.commands.SetUserPropertiesCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowAuthorsCommand;
+import org.apache.doris.nereids.trees.plans.commands.ShowBackendsCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowConfigCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowConstraintsCommand;
import org.apache.doris.nereids.trees.plans.commands.ShowCreateMTMVCommand;
@@ -262,6 +263,10 @@ public interface CommandVisitor<R, C> {
return visitCommand(showViewCommand, context);
}
+ default R visitShowBackendsCommand(ShowBackendsCommand
showBackendsCommand, C context) {
+ return visitCommand(showBackendsCommand, context);
+ }
+
default R visitShowRepositoriesCommand(ShowRepositoriesCommand
showRepositoriesCommand, C context) {
return visitCommand(showRepositoriesCommand, context);
}
diff --git
a/regression-test/suites/nereids_p0/show/test_nereids_showbackends.groovy
b/regression-test/suites/nereids_p0/show/test_nereids_showbackends.groovy
new file mode 100644
index 00000000000..66980ab0e61
--- /dev/null
+++ b/regression-test/suites/nereids_p0/show/test_nereids_showbackends.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("test_nereids_showbackends") {
+ checkNereidsExecute("""show backends;""")
+}
+
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