postgres=#begin;BEGINpostgres=*#createtemptableaaa(c1int)oncommitpreserverows;CREATETABLEpostgres=*#insertintoaaavalues(1),(2);INSERT02postgres=*#commit;COMMITpostgres=#select*fromaaa;c1---12(2rows) 实现 接下来进入到比较有趣的数据库内核环节,关于temp table的实现链路 基本是和普通表的实现接近,包括...
CREATE[TEMPORARY|TEMP]TABLEtable(columntype [NULL|NOTNULL] [UNIQUE] [DEFAULTvalue ] [column_constraint_clause |PRIMARYKEY} [ ... ] ] [, ... ] [,PRIMARYKEY(column[, ...] ) ] [,CHECK( condition ) ] [, table_constraint_clause ] ) [ INHERITS ( inherited_table [, ...] ) ]TEMPOR...
How to Create a TEMPORARY Table Via the CREATE TABLE AS SELECT Command in Postgres? Use theTEMPkeyword along with theCREATE TABLE AScommand to create a temporary table in Postgres: CREATETEMPTABLEtab_nameASSELECTcol_list | expressionFROMexisting_tab_name [WHEREcriteria]; Note:A temporary table i...
复制 postgres=*# explainselectcount(*)frombmscantestwherea>1;QUERY PLAN---Finalize Aggregate(cost=1968.35..1968.36rows=1width=8)->Gather(cost=1568.33..1968.34rows=4width=8)Workers Planned:4->Partial Aggregate(cost=1568.33..1568.34rows=1width=8)->Parallel Seq Scanonbmscantest(cost=0.00..1547....
1 postgres postgres 30 Jan 13 00:00 current_logfiles drwx---. 2 postgres postgres 4096 Jan 12 16:28 global drwx---. 2 postgres postgres 188 Jan 10 00:00 log drwx---. 2 postgres postgres 6 Jan 4 16:56 pg_commit_ts drwx---. 2 postgres postgres 6 Jan 4 16:56 pg_dynshmem -...
query_string=0x2adbf08"create or replace function func_test(pi_v1 in int,pi_v2 varchar,pio_v3 inout varchar,po_v4 out int,po_v5 out varchar)\nreturns record\nas\n$$\ndeclare\nbegin\nraise notice 'pi_v1 := %,pi_v2 := %,pi_v3 :="...) at postgres.c:1215#80x00000000008f0...
在当前数据库中创建一个新的空白表,该表由命令执行者所有。列存表支持的数据类型请参考列存表支持的数据类型。列存表不支持数组。列存表不支持生成列。列存表不支持创建全局临时表。创建列存表的数量建议不超过1000个。如果在建表过程中数据库系统发生故障,系统恢复后可能
gaussdb=# create temp table tmp1(a int,b int); NOTICE: The 'DISTRIBUTE BY' clause is not specified. Using round-robin as the distribution mode by default. HINT: Please use 'DISTRIBUTE BY' clause to specify suitable data distribution column. CREATE TABLE gaussdb=# insert into tmp1 values(...
create table t2 (like t1); mydb=# create table t2 (like t1); CREATE TABLE mydb=# \dt List of relations Schema | Name | Type | Owner ---+---+---+--- postgres | t | table | postgres postgres | t1 | table | postgres postgres | t2 | table | postgres...
postgres=# \d tab Table "public.tab" Column | Type | Collation | Nullable | Default ---+---+---+---+--- col | integer | | | Indexes: "idx" btree (col) INVALID 这种情况下推荐的恢复方法是删除该索引并且尝试再次执行 CREATE INDEX CONCURRENTLY(另一种可能性是用 REINDEX重建该索引。不过...