ST_AsGeobuf
语法 bytea ST_AsGeobuf(anyelement set row);bytea ST_AsGeobuf(anyelement row,text geomName);参数 参数名称 描述 row 具有至少一个Geometry列的行数据。geomName geom_name是行数据中Geometry列的列名。如果为NULL，则默认为找到的第一...
冷热分离
Shell/不带HotOnly Hint的查询，一定会查询到冷数据 hbase(main):017:0>scan 'chsTable'，{STARTROW=>'row1',STOPROW=>'row9'}/带HotOnly Hint的查询，只会查询热数据部分 hbase(main):018:0>scan 'chsTable'，{STARTROW=>'row1',STOPROW=>...
查询索引描述信息
System.out.println(row.getString("Table")+","+row.getLong("Non_unique")+","+row.getString("Key_name")+","+row.getLong("Seq_in_index")+","+row.getString("Column_name")+","+row.getString("Index_type"));} } 返回结果示例如下：...
查询索引描述信息
fmt.Println("response resultset:")resultSet:=response.ResultSet for resultSet.HasNext(){ row:=resultSet.Next()tableName,_:=row.GetStringByName("Table")fmt.Printf("%v,",tableName)nonUnique,_:=row.GetInt64ByName("Non_unique...
LOCK
语法 LOCK TABLE name[,.]IN lockmode MODE[NOWAIT]其中，lockmode 是以下项之一：ROW SHARE|ROW EXCLUSIVE|SHARE|SHARE ROW EXCLUSIVE|EXCLUSIVE 说明 LOCK TABLE 可获得表级别的锁定，必要时等待释放所有冲突的锁定。如果指定 NOWAIT，则...
pg_sphere
显示结果如下：spoint-(4.71238898038469,-0.523598775598299)(1 row)操作符 pg_sphere插件支持以下操作符：Casting：投影 Equality：相等 Contain and overlap：包含和重叠 Crossing of lines：线条相交 Distance：距离 Length and ...
pgtap
materialized_view-ok 4-Materialized view materialized_tap_view should exist(1 row)has_index-ok 5-Index tap_table_index should exist(1 row)has_relation-ok 6-Relation tap_table should exist(1 row)finish-(0 rows)RLS策略测试 ...
pgtap
materialized_view-ok 4-Materialized view materialized_tap_view should exist(1 row)has_index-ok 5-Index tap_table_index should exist(1 row)has_relation-ok 6-Relation tap_table should exist(1 row)finish-(0 rows)RLS策略测试 ...
pgtap
materialized_view-ok 4-Materialized view materialized_tap_view should exist(1 row)has_index-ok 5-Index tap_table_index should exist(1 row)has_relation-ok 6-Relation tap_table should exist(1 row)finish-(0 rows)RLS策略测试 ...
pg_sphere
显示结果如下：spoint-(4.71238898038469,-0.523598775598299)(1 row)操作符 pg_sphere插件支持以下操作符：Casting：投影 Equality：相等 Contain and overlap：包含和重叠 Crossing of lines：线条相交 Distance：距离 Length and ...
pg_sphere
显示结果如下：spoint-(4.71238898038469,-0.523598775598299)(1 row)操作符 pg_sphere插件支持以下操作符：Casting：投影 Equality：相等 Contain and overlap：包含和重叠 Crossing of lines：线条相交 Distance：距离 Length and ...
ST_attrIntFilter
st_attrintfilter-{6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading','>=',5)from traj where id=1;st_attrintfilter-{5,6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading',',5)from ...
pgtap
materialized_view-ok 4-Materialized view materialized_tap_view should exist(1 row)has_index-ok 5-Index tap_table_index should exist(1 row)has_relation-ok 6-Relation tap_table should exist(1 row)finish-(0 rows)RLS策略测试 ...
原子计数器
update_of_attribute_columns={ 'INCREMENT':[('price',6)]} row=Row(primary_key,update_of_attribute_columns)consumed,return_row=client.update_row(table_name,row,None)print('Update succeed,consume%s write cu.'%consumed.write)
ST_attrIntFilter
st_attrintfilter-{6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading','>=',5)from traj where id=1;st_attrintfilter-{5,6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading',',5)from ...
ST_CoordDim
st_coorddim-2(1 row)3维对象（3DM和3DZ）：SELECT ST_CoordDim('POINT(1 0 1)');st_coorddim-3(1 row)SELECT ST_CoordDim('POINTM(1 0 1)');st_coorddim-3(1 row)4维对象：SELECT ST_CoordDim('POINT(1 0 1 1)');st_coorddim-4(1 row)
ST_attrIntFilter
st_attrintfilter-{6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading','>=',5)from traj where id=1;st_attrintfilter-{5,6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading',',5)from ...
DataBlockType
表示返回数据的数据块编码类型。枚举取值列表 DBT_PLAIN_BUFFER表示返回的数据块为Plain Buffer...DBT_SIMPLE_ROW_MATRIX表示返回的数据块为Simple Row Matrix编码类型。enum DataBlockType { DBT_PLAIN_BUFFER=0;DBT_SIMPLE_ROW_MATRIX=1;}
ST_attrIntFilter
st_attrintfilter-{6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading','>=',5)from traj where id=1;st_attrintfilter-{5,6,7,8,9,10,11,12,13,14,15}(1 row)select st_attrIntFilter(traj,'heading',',5)from ...
ST_CoordDim
st_coorddim-2(1 row)3维对象（3DM和3DZ）：SELECT ST_CoordDim('POINT(1 0 1)');st_coorddim-3(1 row)SELECT ST_CoordDim('POINTM(1 0 1)');st_coorddim-3(1 row)4维对象：SELECT ST_CoordDim('POINT(1 0 1 1)');st_coorddim-4(1 row)
ST_CoordDim
st_coorddim-2(1 row)3维对象（3DM和3DZ）：SELECT ST_CoordDim('POINT(1 0 1)');st_coorddim-3(1 row)SELECT ST_CoordDim('POINTM(1 0 1)');st_coorddim-3(1 row)4维对象：SELECT ST_CoordDim('POINT(1 0 1 1)');st_coorddim-4(1 row)
pg_sphere
显示结果如下：spoint-(4.71238898038469,-0.523598775598299)(1 row)操作符 pg_sphere插件支持以下操作符：Casting：投影 Equality：相等 Contain and overlap：包含和重叠 Crossing of lines：线条相交 Distance：距离 Length and ...
ST_AsMVT3D
语法 语法一 bytea ST_AsMVT3D(anyelement set row);语法二 bytea ST_AsMVT3D(anyelement row,text name);语法三 bytea ST_AsMVT3D(anyelement row,text name,integer extent);语法四 bytea ST_AsMVT3D(anyelement row,text name,integer ...
ST_AsMVT3D
语法 语法一 bytea ST_AsMVT3D(anyelement set row);语法二 bytea ST_AsMVT3D(anyelement row,text name);语法三 bytea ST_AsMVT3D(anyelement row,text name,integer extent);语法四 bytea ST_AsMVT3D(anyelement row,text name,integer ...
SHOW
语法：SHOW QUERY_TASK[FOR UserName][WHERE expr][ORDER BY {col_name|expr}[ASC|DESC],.][LIMIT {[offset,]row_count|row_count OFFSET offset}]示例：mysql>show query_task where create_time>'2018-04-12' order by create_time desc ...
如何实现对特定列加一操作
row=getRow(primary_key,'col')/先将该列的值读出来 old_value=row['col']/记录该列的旧的值 row['col']=old_value+1/计算新的值 updateRow(row,condition:row['col']=old_value)/写入新的值，写入时必须带条件检查，期望在写入时，当前列...
ST_AsMVT3D
语法 语法一 bytea ST_AsMVT3D(anyelement set row);语法二 bytea ST_AsMVT3D(anyelement row,text name);语法三 bytea ST_AsMVT3D(anyelement row,text name,integer extent);语法四 bytea ST_AsMVT3D(anyelement row,text name,integer ...
获取时间类型数据
nil { println("[INFO:]get column error,name:",name,",error:",err.Error())} println(time.Local().String())time,err=row.GetDateTimeByName("datetime_value")if err!nil { println("[INFO:]get column error,name:",name,",error:",...
使用EXPLAIN查看并行计划
`description` TEXT NOT NULL,`example` TEXT NOT NULL,`url` TEXT NOT NULL,PRIMARY KEY(`id`))ENGINE=InnoDB AUTO_INCREMENT=21495809 DEFAULT CHARSET=utf8 1 row in set(0.00 sec)表大小如下：SHOW TABLE STATUS\G*1.row*Name:pq_test ...
并发导出数据
while(iterator.hasNext()){ Row row=iterator.next();处理row，内存足够大时可直接放到list中。result.add(row);} } } catch(Exception ex){/重试。{ result.clear();RowIterator iterator=client.createParallelScanIterator...
Condition
在 PutRow、UpdateRow 和 DeleteRow 中使用的行判断条件，目前含有 row_existence 和 column_condition 两项。数据结构 message Condition { required RowExistenceExpectation row_existence=1;optional bytes column_condition=2;} row_...
获取时间类型数据
System.out.println(row.getDateTime(0).withZoneSameInstant(ZoneId.systemDefault())+","+row.getDateTime("datetime_value").withZoneSameInstant(ZoneId.systemDefault())+","+row.getTime(1)+","+row.getTime("time_value")+","+row....
查询节点实例SQL结果
7A1018ADE917*&RegionId=cn-hangzhou &<公共请求参数>正常返回示例 XML 格式<RowList><Row><RowItemList><rowItem>1</rowItem><rowItem>1</rowItem><rowItem>1</rowItem></RowItemList><RowIndex>0</RowIndex></Row><Row><RowItemList>...
行和数组比较
row_constructor IS NOT DISTINCT FROM row_constructor 这个结构与=行比较相似，但是它对于空值输入不会得到空值。任何空值被认为和任何非空值不相等（有区别），并且任意两个空值被认为相等（无区别）。因此结果将总是为真或为假，永远...
GroupBySorter
三种不同排序中选择一种即可，默认是按照row_count_sort排序。数据结构 message GroupBySorter { optional GroupKeySort group_key_sort=1;optional RowCountSort row_count_sort=2;optional SubAggSort sub_agg_sort=3;} 名称 类型 是否必...
MONTHS_BETWEEN
months_between-2(1 row)SELECT MONTHS_BETWEEN('15-OCT-06','15-DEC-06')FROM DUAL;months_between-2(1 row)SELECT MONTHS_BETWEEN('31-JUL-00','01-JUL-00')FROM DUAL;months_between-0.967741935(1 row)SELECT MONTHS_BETWEEN('01-JAN-...
INSERT INTO
语法 INSERT INTO[catalog_name.][db_name.]stream_name VALUES values_row[,values_row.]values_row:(val1[,val2,.])参数说明 参数 是否必选 说明 catalog_name 否 目标流表的Catalog。db_name 否 目标流表所属的数据库名称。stream_name ...
FMT 模式参与者
OceanBase v1.0 记录锁表：CREATE TABLE `dtx_row_lock`(`action_id` varchar(128)NOT NULL COMMENT '分支事务号',`tx_id` varchar(128)NOT NULL COMMENT '主事务号',`table_name` varchar(64)DEFAULT NULL COMMENT '表名称',`row_key` ...
如何设置MySQL数据库备份的binlog_format
使用说明 binlog_format 需要设置为row，而row模式binlog会包含DML完整的前镜像和后镜像数据，便于数据恢复。binlog_format 不推荐设置为statement、mixed模式，相比row模式，没有更好收益。将 binlog_format 设置为row，只会改变binlog...
局部事务
primary_key=[('PK0',1),('PK1','transaction')]attribute_columns=[('value','origion value')]row=Row(primary_key,attribute_columns)condition=Condition(RowExistenceExpectation.IGNORE)consumed,return_row=client.put_row(table_...
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