content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * Licensed 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 com.alibaba.druid.sql.dialect.hive.visitor;
  
  import com.alibaba.druid.DbType;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLName;
  import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
  import com.alibaba.druid.sql.ast.statement.SQLAssignItem;
  import com.alibaba.druid.sql.ast.statement.SQLExprTableSource;
  import com.alibaba.druid.sql.ast.statement.SQLWithSubqueryClause;
  import com.alibaba.druid.sql.dialect.hive.ast.HiveInsert;
  import com.alibaba.druid.sql.dialect.hive.ast.HiveInsertStatement;
  import com.alibaba.druid.sql.dialect.hive.ast.HiveMultiInsertStatement;
  import com.alibaba.druid.sql.dialect.hive.stmt.HiveCreateFunctionStatement;
  import com.alibaba.druid.sql.dialect.hive.stmt.HiveLoadDataStatement;
  import com.alibaba.druid.sql.dialect.hive.stmt.HiveMsckRepairStatement;
  import com.alibaba.druid.sql.repository.SchemaRepository;
  import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
  import com.alibaba.druid.stat.TableStat;
  
  import java.util.List;
  
  public class HiveSchemaStatVisitor extends SchemaStatVisitor implements HiveASTVisitor {
      public HiveSchemaStatVisitor() {
          super(DbType.hive);
      }
  
      public HiveSchemaStatVisitor(DbType dbType) {
          super(dbType);
      }
  
      public HiveSchemaStatVisitor(SchemaRepository repository) {
          super(repository);
      }
  
      @Override
      public boolean visit(HiveInsert x) {
          setMode(x, TableStat.Mode.Insert);
  
          SQLExprTableSource tableSource = x.getTableSource();
          SQLExpr tableName = tableSource != null ? tableSource.getExpr() : null;
  
          if (tableName instanceof SQLName) {
              TableStat stat = getTableStat((SQLName) tableName);
              stat.incrementInsertCount();
  
          }
  
          for (SQLAssignItem partition : x.getPartitions()) {
              partition.accept(this);
          }
  
          accept(x.getQuery());
  
          return false;
      }
  
      @Override
      public boolean visit(HiveMultiInsertStatement x) {
          if (repository != null
                  && x.getParent() == null) {
              repository.resolve(x);
          }
          return true;
      }
  
      @Override
      public boolean visit(HiveInsertStatement x) {
          if (repository != null
                  && x.getParent() == null) {
              repository.resolve(x);
          }
  
          SQLWithSubqueryClause with = x.getWith();
          if (with != null) {
              with.accept(this);
          }
  
          setMode(x, TableStat.Mode.Insert);
  
          SQLExprTableSource tableSource = x.getTableSource();
          SQLExpr tableName = tableSource.getExpr();
  
          if (tableName instanceof SQLName) {
              TableStat stat = getTableStat((SQLName) tableName);
              stat.incrementInsertCount();
  
              List<SQLExpr> columns = x.getColumns();
              for (SQLExpr column : columns) {
                  if (column instanceof SQLIdentifierExpr) {
                      addColumn((SQLName) tableName, ((SQLIdentifierExpr) column).normalizedName());
                  }
              }
          }
  
          for (SQLAssignItem partition : x.getPartitions()) {
              partition.accept(this);
          }
  
          accept(x.getQuery());
  
          return false;
      }
  
      @Override
      public boolean visit(HiveCreateFunctionStatement x) {
          return false;
      }
  
      @Override
      public boolean visit(HiveLoadDataStatement x) {
          TableStat tableStat = getTableStat(x.getInto());
          if (tableStat != null) {
              tableStat.incrementInsertCount();
          }
          return false;
      }
  
      @Override
      public boolean visit(HiveMsckRepairStatement x) {
          return false;
      }
  
  }
  