插入记录时,使用 sde.next_globalid 函数插入下一个全局 ID 值。因为这是一个地理数据库表,所以它还包含 ObjectID。同样,使用 sde.next_rowid 函数将值插入 ObjectID 字段。 INSERTINTOjason.assets(objectid,asset_id,globalid)VALUES(sde.next_rowid('jason','asset...
CREATEORREPLACEFUNCTION"public"."func1"()RETURNSSETOF"public"."a"AS$BODY$BEGINreturnquery select a.id,a.name from a limit2;return;END$BODY$LANGUAGEplpgsqlSTABLECOST100ROWS1000 得到的结果如下图。 期中return query还可以使用return next。具体语法是: 代码语言:javascript 代码运行次数:0 运行 AI代码...
FETCH [ direction { FROM | IN } ] cursor_namedirection 可以是以下选项之一:NEXT PRIOR FIRST LAST ABSOLUTE count RELATIVE count count ALL FORWARD FORWARD count FORWARD ALL BACKWARD BACKWARD count BACKWARD ALLGRANT定义访问权限。GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | ...
blkno | type | live_items | dead_items | avg_item_size | page_size | free_size | btpo_prev | btpo_next | btpo | btpo_flags ---+---+---+---+---+---+---+---+---+---+--- 1 | l | 100 | 0 | 16 | 8192 | 6148 | 0 | 0 | 0 | 3 (1 row) 此时:btpo...
目标数据库的每张表必须具有如下权限:INSERT、SELECT、UPDATE、DELETE、CONNECT、CREATE。 说明: 建议创建单独用于Migration任务连接的数据库账号,避免因为数据库账号密码修改,导致的任务连接失败。 连接源和目标数据库的账号密码修改后,请同步修改管理中心对应的连接信息,避免任务连接失败后自动重试,导致数据库账号被锁定影...
(original) page, and set in the right page, but only if the next page* to its right has a different cycleid.** NOTE: the BTP_LEAF flag bit is redundant since level==0 could be tested* instead.** NOTE: the btpo_level field used to be a union type in order to allow* deleted ...
if (RecoveryInProgress()) elog(ERROR, "cannot assign TransactionIds during recovery"); LWLockAcquire(XidGenLock, LW_EXCLUSIVE); #如果事务在运行的模式,则不能分配事务ID, 否则获取LW锁,准备进行事务ID的分配 xid = ShmemVariableCache->nextXid; ...
{first child = 0x0,next_sibling = 0x0, prev_or_parent = @x0}, whenTaken = 0, lsn = 0} (gdb) p *tuple $4 ={t_choice ={t_heap ={t_xmin =12926,t_xmax = 0,t_field3 = {t_cid = 0,t_xvac = 0}},t_datum = {datum_len =12926,datum_typmod=0,idatum_typeid = 0}...
postgressql中的自增长用serial存储,但是在数据库中是以默认值的形式实现的,用nextvalue函数,可以在pg_attrdef表中查出值 tip 5 postgresql字符串拼接函数,字符串拼接语法 string||stringtextString concatenation'Post' || 'greSQL'PostgreSQL tip 6 对于数组可以用unnest函数化为多行然后left join,例如select * from...
Latest checkpoint's TimeLineID: 1 Latest checkpoint's PrevTimeLineID: 1 Latest checkpoint's full_page_writes: on Latest checkpoint's NextXID: 0:1762 Latest checkpoint's NextOID: 24576 Latest checkpoint's NextMultiXactId: 1 Latest checkpoint's NextMultiOffset: 0 ...