content: /*
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   ~ The MIT License (MIT)                                                         ~
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   ~ Copyright (c) 2015-2025 miaixz.org and other contributors.                    ~
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   ~ copies of the Software, and to permit persons to whom the Software is         ~
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  */
  package org.miaixz.bus.shade.screw.dialect.sqlserver;
  
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import javax.sql.DataSource;
  
  import org.miaixz.bus.core.lang.Assert;
  import org.miaixz.bus.core.lang.exception.InternalException;
  import org.miaixz.bus.core.xyz.CollKit;
  import org.miaixz.bus.shade.screw.Builder;
  import org.miaixz.bus.shade.screw.dialect.AbstractDatabaseQuery;
  import org.miaixz.bus.shade.screw.mapping.Mapping;
  import org.miaixz.bus.shade.screw.metadata.Column;
  import org.miaixz.bus.shade.screw.metadata.Database;
  import org.miaixz.bus.shade.screw.metadata.PrimaryKey;
  
  /**
   * sql server 查询
   * <p>
   * 获取列文档
   * ：https://docs.microsoft.com/zh-cn/sql/connect/jdbc/reference/getcolumns-method-sqlserverdatabasemetadata?view=sql-server-ver15
   * </p>
   * <p>
   * 获取表文档
   * ：https://docs.microsoft.com/zh-cn/sql/connect/jdbc/reference/gettables-method-sqlserverdatabasemetadata?view=sql-server-ver15
   * </p>
   * 通过文档发现，查询列和查询表的 REMARKS 字段SQL Server 不会为此列返回值。所以对于SQL server 自己写SQL语句了,差缺补全
   *
   * @author Kimi Liu
   * @since Java 17+
   */
  public class SqlServerDataBaseQuery extends AbstractDatabaseQuery {
  
      /**
       * 构造函数
       *
       * @param dataSource {@link DataSource}
       */
      public SqlServerDataBaseQuery(DataSource dataSource) {
          super(dataSource);
      }
  
      /**
       * 获取数据库
       *
       * @return {@link Database} 数据库信息
       */
      @Override
      public Database getDataBase() throws InternalException {
          SqlServerDatabase model = new SqlServerDatabase();
          // 当前数据库名称
          model.setDatabase(getCatalog());
          return model;
      }
  
      /**
       * 获取表信息
       *
       * @return {@link List} 所有表信息
       */
      @Override
      public List<SqlServerTable> getTables() {
          ResultSet resultSet = null;
          try {
              // 查询
              resultSet = getMetaData()
                      .getTables(getCatalog(), getSchema(), Builder.PERCENT_SIGN, new String[] { "TABLE" });
              // 映射
              List<SqlServerTable> list = Mapping.convertList(resultSet, SqlServerTable.class);
              // 由于驱动无法查询出 REMARKS 内容，所以通过自定义SQL查询
              String sql = "select cast(so.name as varchar(500)) as TABLE_NAME, cast(sep.value as varchar(500)) as REMARKS from sysobjects so left JOIN sys.extended_properties sep on sep.major_id = so.id and sep.minor_id = 0 where (xtype = 'U' or xtype = 'v')";
              resultSet = prepareStatement(String.format(sql, getCatalog())).executeQuery();
              List<SqlServerTable> inquires = Mapping.convertList(resultSet, SqlServerTable.class);
              // 处理备注信息
              for (SqlServerTable model : list) {
                  for (SqlServerTable inquire : inquires) {
                      if (model.getTableName().equals(inquire.getTableName())) {
                          // 备注
                          model.setRemarks(inquire.getRemarks());
                      }
                  }
              }
              return list;
          } catch (SQLException e) {
              throw new InternalException(e);
          } finally {
              close(resultSet, this.connection);
          }
      }
  
      /**
       * 获取列信息
       *
       * @param table {@link String} 表名
       * @return {@link List} 表字段信息
       */
      @Override
      public List<SqlServerColumn> getTableColumns(String table) throws InternalException {
          Assert.notEmpty(table, "Table name can not be empty!");
          ResultSet resultSet = null;
          try {
              // 查询
              resultSet = getMetaData().getColumns(getCatalog(), getSchema(), table, Builder.PERCENT_SIGN);
              // 映射
              List<SqlServerColumn> list = Mapping.convertList(resultSet, SqlServerColumn.class);
              // 这里处理是为了如果是查询全部列呢？所以处理并获取唯一表名
              List<String> tableNames = list.stream().map(SqlServerColumn::getTableName).collect(Collectors.toList())
                      .stream().distinct().collect(Collectors.toList());
              if (CollKit.isEmpty(columnsCaching)) {
                  // 查询全部
                  if (table.equals(Builder.PERCENT_SIGN)) {
                      // 获取全部表列信息SQL
                      String sql = "SELECT cast(a.name AS VARCHAR(500)) AS TABLE_NAME, cast(b.name AS VARCHAR(500)) AS COLUMN_NAME, cast(c.VALUE AS NVARCHAR(500)) AS REMARKS, cast(sys.types.name AS VARCHAR(500)) + '(' + cast(b.max_length AS NVARCHAR(500)) + ')' AS COLUMN_TYPE, cast(b.max_length AS NVARCHAR(500)) AS COLUMN_LENGTH FROM(SELECT name, object_id FROM sys.tables UNION all SELECT name, object_id FROM sys.views) a INNER JOIN sys.columns b ON b.object_id = a.object_id LEFT JOIN sys.types ON b.user_type_id = sys.types.user_type_id LEFT JOIN sys.extended_properties c ON c.major_id = b.object_id AND c.minor_id = b.column_id";
                      PreparedStatement statement = prepareStatement(sql);
                      resultSet = statement.executeQuery();
                      int fetchSize = 4284;
                      if (resultSet.getFetchSize() < fetchSize) {
                          resultSet.setFetchSize(fetchSize);
                      }
                  }
                  // 单表查询
                  else {
                      // 获取表列信息SQL 查询表名、列名、说明、数据类型
                      String sql = "SELECT cast(a.name AS VARCHAR(500)) AS TABLE_NAME, cast(b.name AS VARCHAR(500)) AS COLUMN_NAME, cast(c.VALUE AS NVARCHAR(500)) AS REMARKS, cast(sys.types.name AS VARCHAR(500)) + '(' + cast(b.max_length AS NVARCHAR(500)) + ')' AS COLUMN_TYPE, cast(b.max_length AS NVARCHAR(500)) AS COLUMN_LENGTH FROM(SELECT name, object_id FROM sys.tables UNION all SELECT name, object_id FROM sys.views) a INNER JOIN sys.columns b ON b.object_id = a.object_id LEFT JOIN sys.types ON b.user_type_id = sys.types.user_type_id LEFT JOIN sys.extended_properties c ON c.major_id = b.object_id AND c.minor_id = b.column_id WHERE a.name = '%s'";
                      resultSet = prepareStatement(String.format(sql, table)).executeQuery();
                  }
                  List<SqlServerColumn> inquires = Mapping.convertList(resultSet, SqlServerColumn.class);
                  // 处理列，表名为key，列名为值
                  tableNames.forEach(
                          name -> columnsCaching.put(
                                  name,
                                  inquires.stream().filter(i -> i.getTableName().equals(name))
                                          .collect(Collectors.toList())));
              }
              // 处理备注信息
              list.forEach(i -> {
                  // 从缓存中根据表名获取列信息
                  List<Column> columns = columnsCaching.get(i.getTableName());
                  columns.forEach(j -> {
                      // 列名表名一致
                      if (i.getColumnName().equals(j.getColumnName()) && i.getTableName().equals(j.getTableName())) {
                          // 放入备注
                          i.setRemarks(j.getRemarks());
                          i.setColumnLength(j.getColumnLength());
                          i.setColumnType(j.getColumnType());
                      }
                  });
              });
              return list;
          } catch (SQLException e) {
              throw new InternalException(e);
          } finally {
              close(resultSet, this.connection);
          }
      }
  
      /**
       * 获取所有列信息
       *
       * @return {@link List} 表字段信息
       * @throws InternalException 异常
       */
      @Override
      public List<? extends Column> getTableColumns() throws InternalException {
          return getTableColumns(Builder.PERCENT_SIGN);
      }
  
      /**
       * 根据表名获取主键
       *
       * @param table {@link String}
       * @return {@link List}
       * @throws InternalException 异常
       */
      @Override
      public List<? extends PrimaryKey> getPrimaryKeys(String table) throws InternalException {
          ResultSet resultSet = null;
          try {
              // 查询
              resultSet = getMetaData().getPrimaryKeys(getCatalog(), getSchema(), table);
              // 映射
              return Mapping.convertList(resultSet, SqlServerPrimaryKey.class);
          } catch (SQLException e) {
              throw new InternalException(e);
          } finally {
              close(resultSet, this.connection);
          }
      }
  
      /**
       * 根据表名获取主键
       *
       * @return {@link List}
       * @throws InternalException 异常
       */
      @Override
      public List<? extends PrimaryKey> getPrimaryKeys() throws InternalException {
          ResultSet resultSet = null;
          try {
              // 由于单条循环查询存在性能问题，所以这里通过自定义SQL查询数据库主键信息
              // sp_pkeys [ @table_name = ] 'name' [ , [ @table_owner = ] 'owner' ] [ , [ @table_qualifier = ] 'qualifier'
              // ]
              String sql = "SELECT TABLE_CATALOG AS 'TABLE_QUALIFIER', TABLE_SCHEMA AS 'TABLE_OWNER', TABLE_NAME AS 'TABLE_NAME', COLUMN_NAME AS 'COLUMN_NAME', ORDINAL_POSITION AS 'KEY_SEQ', CONSTRAINT_NAME AS 'PK_NAME' FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE TABLE_CATALOG = '%s' AND TABLE_SCHEMA = '%s' ORDER BY KEY_SEQ";
              // 拼接参数
              resultSet = prepareStatement(String.format(sql, getCatalog(), getSchema())).executeQuery();
              return Mapping.convertList(resultSet, SqlServerPrimaryKey.class);
          } catch (SQLException e) {
              throw new InternalException(e);
          } finally {
              close(resultSet);
          }
      }
  
  }
  