支持的接口与方法
Statement addBatch(String)close()execute(String)executeQuery(String)getMoreResult isClosed()setFetchSize(int)ResultSet addBatch()clearBatch()close()execute()executeBatch()executeQuery()getParameterNumber()setNull(int)...
HiKariCP 连接池配置示例
.executeQuery();while(rs.next()){ System.out.print(rs.getObject(1)+"\t");} System.out.println();System.out.println("-");stmt.executeUpdate("update data_test set test1=100;ResultSet rs1=conn.prepareStatement("select*...
通过JDBC连接Dataphin
ResultSet executeQuery(String sql)throws SQLException;setFetchSize 根据设置的行数分批获取结果数据。若未设置或设置为0，则默认1000。void setFetchSize(int rows)throws SQLException cancel 取消Statement的执行。void cancel()...
JSON数据类型
ResultSet resultSet=stmt.executeQuery(select);resultSet.next();String resultC2=resultSet.getString(c2);resultC2等于c2列 String resultC2k1=resultSet.getString("j");resultC2k1等于c2列中k1键的值，结果为1 写入的JSON列数据为"{\...
Druid
dds.setXxx()try(Connection c=dds.getConnection()){ try(Statement s=c.createStatement()){ try(ResultSet rs=s.executeQuery("select*from your_dla_schema.your_dla_table")){ while(rs.next()){ System.out.println(rs.getObject(1))...
高并发点查
ResultSet resultSet=readStatement.executeQuery();readStatement.setInt(1235);resultSet=readStatement.executeQuery();开启行缓存 SelectDB中有针对Page级别的内存缓存（Page Cache），每个Page中存储的是某一列的数据，这意味着Page ...
JDBC连接表格存储
ResultSet resultSet=stmt.executeQuery("SELECT count(*)FROM t");while(resultSet.next()){ resultSet.getLong(1);支持的类型转换。resultSet.getCharacterStream(1);不支持的类型转换，系统会抛出异常。} 表格存储数据类型和Java类型...
Java JDBC Driver开发手册
Statement addBatch(String)close()execute(String)executeQuery(String)getMoreResult isClosed()setFetchSize(int)ResultSet addBatch()clearBatch()close()execute()executeBatch()executeQuery()getParameterNumber()setNull(int)...
通过SQL连接并使用搜索引擎
查询 ResultSet rs=stmt.executeQuery("select*from test order by c1");System.out.println("#before delete:");while(rs.next()){ System.out.println("c1="+rs.getInt("c1")+",c2="+rs.getString("c2"));}/删除记录 stmt.execute(...
Quick BI创建数据集关联一张表后预览报错：INTERNAL:...
81)com.alibaba.nox.executor.task.jdbc.OdpsJdbcDataQueryTaskImpl.executeQuery(OdpsJdbcDataQueryTaskImpl.java:30)问题原因 用户关联的这张表为分区表，未指定分区导致报错。解决方案 在数据集的过滤条件中，过滤指定该分区表的分区后...
通过HTTPS协议连接ClickHouse
conn.createStatement().executeQuery("select now()");} catch(Throwable e){ e.printStackTrace();} } 说明 如果通过IP地址连接，连接源和 云数据库ClickHouse 集群需属于同一个VPC且 SSL Mode 取值为 none。示例如下。public void run()...
JDBC
resultSet=statement.executeQuery(sql);while(resultSet.next()){ System.out.println("id:"+resultSet.getInt(1));System.out.println("name:"+resultSet.getString(2));} } catch(Exception e){ e.printStackTrace();throw e;} finally ...
BLOB数据类型（邀测中）
获取BLOB列对应的InputStream对象进行读取 ResultSet resultSet=stmt.executeQuery("select*from"+tableName+"where p1=1");Blob blob=resultSet.getBlob(3);InputStream inputStream=blob.getBinaryStream();应用从InputStream对象中获取...
如何优化数据全量抽取
Get partition id and physical table name of given logical table try(final ResultSet rs=statement.executeQuery(MessageFormat.format(topology,logicalTableName))){ while(rs.next()){ partitionTableMap.computeIfAbsent(rs....
C3P0 连接池配置示例
ResultSet resultSet=ps.executeQuery("select*from t1");while(resultSet.next()){ int count=resultSet.getMetaData().getColumnCount();for(int i=1;i;i+){ System.out.println(resultSet.getMetaData().getColumnName(i)+":"+resultSet...
连接Kyuubi
ResultSet res=st.executeQuery("show databases");while(res.next()){ System.out.println(res.getString(1));} res.close();st.close();conn.close();} } 参考文档 Hive Beeline Getting Started With Hive JDBC Kyuubi Hive JDBC Driver
Java
rs=statement.executeQuery(query);while(rs.next()){ System.out.println(rs.getObject(1));} } catch(ClassNotFoundException e){ e.printStackTrace();} catch(SQLException e){ e.printStackTrace();} catch(Exception e){ e....
通过JDBC方式连接ClickHouse
} } try(ResultSet rs=stmt.executeQuery("select id,dt_str,dt_col from test_dist limit 10");{ while(rs.next()){ int id=rs.getInt(1);String dateStr=rs.getString(2);Timestamp time=rs.getTimestamp(3);String defaultDate=SIMPLE_...
Java访问（2.0版）
rs=statement.executeQuery(query);while(rs.next()){ System.out.println(rs.getObject(1));} } catch(ClassNotFoundException e){ e.printStackTrace();} catch(SQLException e){ e.printStackTrace();} catch(Exception e){ e....
使用Java JDBC接口的应用开发
ResultSet rs=ps.executeQuery();while(rs.next()){ String id=rs.getString(1);String name=rs.getString(2);System.out.println("id="+id);System.out.println("name="+name);} }/删除数据 String deleteSql="delete from"+tableName+...
基于Java JDBC接口的应用开发
ResultSet rs=ps.executeQuery();while(rs.next()){ String id=rs.getString(1);String name=rs.getString(2);System.out.println("id="+id);System.out.println("name="+name);} }/删除数据 String deleteSql="delete from"+tableName+...
使用说明
ResultSet rset=stmt.executeQuery("SELECT foo FROM bar");while(rset.next()){/process the results } rset.close();stmt.close();cnct.close();示例代码 删除表、创建表和获取Metadata 说明 如果项目中使用了JDBC依赖，则不需要指定SDK...
Key/Value查询场景最佳实践
try(ResultSet rs=stmt.executeQuery()){ long cost=System.currentTimeMillis()-begin;while(rs.next()){ System.out.println("data=>"+rs.getObject(1).toString()+""+rs.getObject(2).toString()+"latency=>["+cost+"]ms");} } } } } ...
基于JDBC的负载均衡
ResultSet resultSet=preparedStatement.executeQuery();while(resultSet.next()){ ResultSetMetaData rsmd=resultSet.getMetaData();int columnCount=rsmd.getColumnCount();Map map=new HashMap();for(int i=0;i;i+){ map.put(rsmd....
Phoenix
rset=statement.executeQuery();while(rset.next()){ System.out.println(rset.getString("mycolumn"));} statement.close();con.close();} } 其中，JDBC URL语法为 jdbc:phoenix:[comma-separated ZooKeeper Quorum Hosts[:ZK port[:hbase...
JDBC
ResultSet rs=st.executeQuery("*FROM gp_segment_configuration;while(rs.next()){ System.out.print(rs.getString(1));System.out.print("|");System.out.print(rs.getString(2));System.out.print("|");System.out.print(rs....
使用JDBC提交Presto作业
本文为您介绍如何使用JDBC编程的方式访问Trino On ACK服务并执行查询操作。...ResultSet rs=stmt.executeQuery("show catalogs");while(rs.next()){ System.out.println(rs.getString("Catalog"));} stmt.close();connection.close();} }
错误码
SDK 集成相关 错误码 错误消息 错误说明 解决方案 DTX-000 dtx component scanner init error.SDK 启动失败，分布式事务不可用。DTX-001 Bean[%s]can not have@DtxTransaction and@TccBusinessAction both.同一个 bean 不能既有@...
Java
查询数据，并输出结果 ResultSet rs=sm.executeQuery("select*from t_meta_form");while(rs.next()){ String name=rs.getString("name");String id=rs.getString("id");System.out.println(name+','+id);}/删除表 sm.executeUpdate("drop ...
Java 驱动连接 OceanBase 数据库
查询数据，并输出结果 ResultSet rs=sm.executeQuery("select*from t_meta_form");while(rs.next()){ String name=rs.getString("name");String id=rs.getString("id");System.out.println(name+','+id);}/删除表 sm.executeUpdate("drop ...
proxool 连接池配置示例
ResultSet resultSet=ps.executeQuery("select*from t1");while(resultSet.next()){ int count=resultSet.getMetaData().getColumnCount();for(int i=1;i;i+){ System.out.println(resultSet.getMetaData().getColumnName(i)+":"+resultSet...
Dataphin 通过SDK代码调用“服务”模块发布的...
该行代码 ResultSet rs=stmt.executeQuery("select*from ld_eyc.fct_engagement_unit_info_di where ds='20230129'"查询时候返回的rs已经调过rs.next了，再while(rs.next)判断就取不到数据了。解决方案 取消while(rs.next)循环判断的时候...
推荐连接池配合
rs=stmt.executeQuery(sql);your logic.executeSuccess=true;} catch(){ log.retryTime+;} finally { try { if(rs!null){ rs.close();} if(stmt!null){ stmt.close();} if(conn!null){ conn.close();} } catch(Throwable t){ logging.} } }...
Java程序如何连接RDS MySQL
ResultSet rs=stmt.executeQuery(sql);System.out.println("学号\t姓名");while(rs.next()){ System.out.println(rs.getString(1)+"\t"+rs.getString(2));} }/捕捉异常。} catch(SQLException e){ System.out.println("MySQL操作错误");e....
JDBC开发实践
ResultSet res=stmt.executeQuery(sql);while(res.next()){ System.out.println(res.getString(1));} } } 可选：如果您需要配置更多的作业参数可以在JDBC连接地址中指定，示例如下：String endpoint="jdbc:hive2:/123.234.XX.XX:10009/;...
Oracle2PolarDB：Polardb-O兼容性之fetchsize
ResultSet rs=st.executeQuery("SELECT*FROM mytable");while(rs.next()){ System.out.print("a row was returned.");} rs.close();Turn the cursor off.st.setFetchSize(0);rs=st.executeQuery("SELECT*FROM mytable");while(rs.next()){ ...
SpringBatch 连接 OceanBase 数据库
ResultSet resultSet=preparedStatement.executeQuery();List list=new ArrayList();基于添加 desc 属性的处理器对结果集进行加工，并封装成一个 List<PeopleDESC>while(resultSet.next()){ People people=peopleRowMapper.mapRow...
通过应用程序访问数据库
resultSet=statement.executeQuery(selectSql);while(resultSet.next()){ System.out.println(resultSet.getString("name"));} } catch(SQLException e){ e.printStackTrace();} } } Python import pymysql connection=pymysql.connect...
SpringBatch 连接 OceanBase 数据库
ResultSet resultSet=preparedStatement.executeQuery();List list=new ArrayList();基于添加 desc 属性的处理器对结果集进行加工，并封装成一个 List<PeopleDESC>while(resultSet.next()){ People people=peopleRowMapper.mapRow...
OCS与数据库结合使用示例
ResultSet result=ps.executeQuery(sql);result.next();value=result.getString(1);System.out.println(“从MySQL中查询数据.Key=“+key+”Value=”+value);step 2：把数据库返回的数据作为value存放到OCS缓存中去 cache.set(key,EXPIRE_...
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