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.postgresql.visitor;
  
  import com.alibaba.druid.DbType;
  import com.alibaba.druid.sql.ast.SQLName;
  import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
  import com.alibaba.druid.sql.ast.statement.SQLTableSource;
  import com.alibaba.druid.sql.dialect.postgresql.ast.expr.PGTypeCastExpr;
  import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.*;
  import com.alibaba.druid.sql.repository.SchemaRepository;
  import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
  import com.alibaba.druid.stat.TableStat;
  import com.alibaba.druid.stat.TableStat.Mode;
  import com.alibaba.druid.util.PGUtils;
  
  public class PGSchemaStatVisitor extends SchemaStatVisitor implements PGASTVisitor {
      public PGSchemaStatVisitor() {
          super(DbType.postgresql);
      }
  
      public PGSchemaStatVisitor(SchemaRepository repository) {
          super(repository);
      }
  
      @Override
      public DbType getDbType() {
          return DbType.postgresql;
      }
  
      @Override
      public boolean visit(PGDeleteStatement x) {
          if (repository != null
                  && x.getParent() == null) {
              repository.resolve(x);
          }
  
          if (x.getWith() != null) {
              x.getWith().accept(this);
          }
  
          SQLTableSource using = x.getUsing();
          if (using != null) {
              using.accept(this);
          }
  
          x.putAttribute("_original_use_mode", getMode());
          setMode(x, Mode.Delete);
  
          TableStat stat = getTableStat(x.getTableName());
          stat.incrementDeleteCount();
  
          accept(x.getWhere());
  
          return false;
      }
  
      @Override
      public boolean visit(PGInsertStatement x) {
          if (repository != null
                  && x.getParent() == null) {
              repository.resolve(x);
          }
  
          if (x.getWith() != null) {
              x.getWith().accept(this);
          }
  
          x.putAttribute("_original_use_mode", getMode());
          setMode(x, Mode.Insert);
  
          SQLName tableName = x.getTableName();
          {
              TableStat stat = getTableStat(tableName);
              stat.incrementInsertCount();
          }
  
          accept(x.getColumns());
          accept(x.getQuery());
  
          return false;
      }
  
      @Override
      public void endVisit(PGSelectStatement x) {
      }
  
      @Override
      public boolean visit(PGSelectStatement x) {
          return visit((SQLSelectStatement) x);
      }
  
      public boolean isPseudoColumn(long hash) {
          return PGUtils.isPseudoColumn(hash);
      }
  
      @Override
      public boolean visit(PGUpdateStatement x) {
          if (repository != null
                  && x.getParent() == null) {
              repository.resolve(x);
          }
  
          if (x.getWith() != null) {
              x.getWith().accept(this);
          }
  
          TableStat stat = getTableStat(x.getTableName());
          stat.incrementUpdateCount();
  
          accept(x.getFrom());
  
          accept(x.getItems());
          accept(x.getWhere());
  
          return false;
      }
  
      @Override
      public boolean visit(PGTypeCastExpr x) {
          x.getExpr().accept(this);
          return false;
      }
  
      @Override
      public boolean visit(PGShowStatement x) {
          return false;
      }
  
      @Override
      public boolean visit(PGStartTransactionStatement x) {
          return false;
      }
  
      @Override
      public boolean visit(PGEndTransactionStatement x) {
          return false;
      }
      @Override
      public boolean visit(PGConnectToStatement x) {
          return false;
      }
  
      @Override
      public boolean visit(PGCreateSchemaStatement x) {
          return false;
      }
  
      @Override
      public boolean visit(PGDropSchemaStatement x) {
          return false;
      }
  
      @Override
      public boolean visit(PGAlterSchemaStatement x) {
          return false;
      }
  
  }
  