content: package com.alibaba.druid.sql.dialect.clickhouse.visitor;
  
  import com.alibaba.druid.sql.dialect.clickhouse.ast.CKAlterTableUpdateStatement;
  import com.alibaba.druid.sql.dialect.clickhouse.ast.CKCreateTableStatement;
  import com.alibaba.druid.sql.dialect.clickhouse.ast.CKSelectQueryBlock;
  import com.alibaba.druid.sql.dialect.clickhouse.ast.ClickhouseColumnCodec;
  import com.alibaba.druid.sql.dialect.clickhouse.ast.ClickhouseColumnTTL;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  public interface CKASTVisitor extends SQLASTVisitor {
      default boolean visit(CKCreateTableStatement x) {
          return true;
      }
  
      default void endVisit(CKCreateTableStatement x) {
      }
  
      default boolean visit(CKSelectQueryBlock x) {
          return true;
      }
  
      default void endVisit(CKSelectQueryBlock x) {
      }
  
      default boolean visit(CKAlterTableUpdateStatement x) {
          return true;
      }
  
      default void endVisit(CKAlterTableUpdateStatement x) {
      }
  
      default boolean visit(ClickhouseColumnCodec x) {
          return true;
      }
  
      default void endVisit(ClickhouseColumnCodec x) {
      }
  
      default boolean visit(ClickhouseColumnTTL x) {
          return true;
      }
  
      default void endVisit(ClickhouseColumnTTL x) {
      }
  }
  