test=# \dfList of functionsSchema | Name | Result data type | Argument data types| Type---+---+---+---+---public | __tmp_create_user | void || funcpublic | auditlogfunc | trigger || funcpublic | copytable |
查看触发器函数定义,可以看到2023年分区已添加 postgres=# \df+ log_history_insert_triggerList offunctions-[ RECORD 1 ]---+--- Schema | public Name | log_history_insert_trigger Result datatype| trigger Argument data types | Type | func Volatility | volatile Parallel | unsafe Owner | postgres1...
postgres=# \df List of functionsSchema | Name | Result data type | Argument data types | Type---+---+---+---
(1 row) 与pg_get_viewdef类似的函数还有如下,其原理都是差不多的,将数据字典的重写规则翻译为sql: aligputf8=# \df pg_get_*def Listof functions Schema |Name | Result data type | Argument data types ---+---+---+--- pg_catalog | pg_get_constraintdef | text | oid pg_catalog | pg...
ListoffunctionsSchema|Name| Result datatype| Argument datatypes|Type---+---+---+---+---pg_catalog | hash_aclitem |integer| aclitem | func pg_catalog | hash_aclitem_extended |bigint| aclitem,bigint| func pg_catalog | hash_array |integer|any...
*/6263#ifdefCATALOG_VARLEN64Oid proallargtypes[1];/* all param types (NULL if IN only) */65char proargmodes[1];/* parameter modes (NULL if IN only) */66text proargnames[1];/* parameter names (NULL if no names) */67pg_node_tree proargdefaults;/* list of expression trees for...
(rlocator.relNumber));if(SMgrRelationHash==NULL){/* First time through: initialize the hash table */HASHCTLctl;ctl.keysize=sizeof(RelFileLocatorBackend);ctl.entrysize=sizeof(SMgrRelationData);SMgrRelationHash=hash_create("smgr relation table",400,&ctl,HASH_ELEM|HASH_BLOBS);dlist_init(&un...
# 模糊查询,extra_info ->> 'blacklistName'表示从json中取出key为blacklistName的元素 SELECT * FROM alarm WHERE is_deleted = 0 AND extra_info ->> 'blacklistName' like '%张三%' # 另一种写法,字符串精确查询 SELECT * FROM alarm WHERE is_deleted = 0 AND (extra_info @@ '$.blacklistId ...
基因倒排索引(Generalized Inverted Index) 存储了一个Key/posting list 的结构,Key是唯一键。posting list里面存储了Key出现的行。 GIN索引的创建方式如下: CREATE INDEX GIN_idx1 ON student USING GIN (to_tsvector('english', stud_name)); GIN 索引显然是给搜索优化做准备的,GIN 索引是反转索引,它可以处理...
Removes all rows fromcitus_stat_statements. This function works independently frompg_stat_statements_reset(). To reset all stats, call both functions. Arguments N/A Return value None citus_get_active_worker_nodes The citus_get_active_worker_nodes() function returns a list of active worker host...