EmmyMiao87 commented on a change in pull request #6219:
URL: https://github.com/apache/incubator-doris/pull/6219#discussion_r669347621
##########
File path:
docs/zh-CN/sql-reference/sql-statements/Administration/ADMIN-SHOW-DATA-SKEW.md
##########
@@ -0,0 +1,50 @@
+---
+{
+ "title": "ADMIN SHOW DATA SKEW",
+ "language": "zh-CN"
+}
+---
+
+<!--
+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.
+-->
+
+# ADMIN SHOW DATA SKEW
+## description
+
+ 该语句用于查看表或某个分区的数据倾斜情况。
+
+ 语法：
+
+ ADMIN SHOW DATA SKEW FROM [db_name.]tbl_name [PARTITION (p1)];
Review comment:
如果 partition 是必填项，那么不用加 []
##########
File path:
docs/zh-CN/sql-reference/sql-statements/Administration/ADMIN-SHOW-DATA-SKEW.md
##########
@@ -0,0 +1,50 @@
+---
+{
+ "title": "ADMIN SHOW DATA SKEW",
+ "language": "zh-CN"
+}
+---
+
+<!--
+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.
+-->
+
+# ADMIN SHOW DATA SKEW
+## description
+
+ 该语句用于查看表或某个分区的数据倾斜情况。
+
+ 语法：
+
+ ADMIN SHOW DATA SKEW FROM [db_name.]tbl_name [PARTITION (p1)];
+
+ 说明：
+
+ 1. 必须指定且仅指定一个分区。对于非分区表，分区名称同表名。
+ 2. 结果将展示指定分区下，各个分桶的数据量，以及每个分桶数据量在总数据量中的占比。
Review comment:
注意格式
##########
File path: fe/fe-core/src/main/cup/sql_parser.cup
##########
@@ -262,6 +262,7 @@ terminal String KW_ADD, KW_ADMIN, KW_AFTER, KW_AGGREGATE,
KW_ALL, KW_ALTER, KW_A
KW_REPAIR, KW_REPEATABLE, KW_REPOSITORY, KW_REPOSITORIES, KW_REPLACE,
KW_REPLACE_IF_NOT_NULL, KW_REPLICA, KW_RESOURCE, KW_RESOURCES, KW_RESTORE,
KW_RETURNS, KW_RESUME, KW_REVOKE,
KW_RIGHT, KW_ROLE, KW_ROLES, KW_ROLLBACK, KW_ROLLUP, KW_ROUTINE, KW_ROW,
KW_ROWS,
KW_S3, KW_SCHEMA, KW_SCHEMAS, KW_SECOND, KW_SELECT, KW_SEMI,
KW_SERIALIZABLE, KW_SESSION, KW_SET, KW_SETS, KW_SET_VAR, KW_SHOW, KW_SIGNED,
+ KW_SKEW,
Review comment:
Pay attention to the format
##########
File path:
fe/fe-core/src/main/java/org/apache/doris/analysis/AdminShowDataSkewStmt.java
##########
@@ -0,0 +1,99 @@
+// 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.analysis;
+
+import org.apache.doris.catalog.Catalog;
+import org.apache.doris.catalog.Column;
+import org.apache.doris.catalog.ScalarType;
+import org.apache.doris.cluster.ClusterNamespace;
+import org.apache.doris.common.AnalysisException;
+import org.apache.doris.common.ErrorCode;
+import org.apache.doris.common.ErrorReport;
+import org.apache.doris.common.UserException;
+import org.apache.doris.mysql.privilege.PrivPredicate;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.qe.ShowResultSetMetaData;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableList;
+
+// admin show data skew from tbl [partition(p1, p2, ...)]
+public class AdminShowDataSkewStmt extends ShowStmt {
+ public static final ImmutableList<String> TITLE_NAMES = new
ImmutableList.Builder<String>()
+ .add("BucketIdx").add("AvgDataSize")
+ .add("Graph").add("Percent")
+ .build();
+
+ private TableRef tblRef;
+
+ public AdminShowDataSkewStmt(TableRef tblRef) {
+ this.tblRef = tblRef;
+ }
+
+ @Override
+ public void analyze(Analyzer analyzer) throws UserException {
+ super.analyze(analyzer);
+
+ // check auth
+ if
(!Catalog.getCurrentCatalog().getAuth().checkGlobalPriv(ConnectContext.get(),
PrivPredicate.ADMIN)) {
+
ErrorReport.reportAnalysisException(ErrorCode.ERR_SPECIFIC_ACCESS_DENIED_ERROR,
"ADMIN");
+ }
+
+ String dbName = null;
+ if (Strings.isNullOrEmpty(tblRef.getName().getDb())) {
+ dbName = analyzer.getDefaultDb();
+ if (Strings.isNullOrEmpty(dbName)) {
+ ErrorReport.reportAnalysisException(ErrorCode.ERR_NO_DB_ERROR);
+ }
+ } else {
+ dbName = ClusterNamespace.getFullName(getClusterName(),
tblRef.getName().getDb());
+ }
+
+ tblRef.getName().setDb(dbName);
Review comment:
analyze tblRef before check partition
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