CREATE TABLE astore_table ( id character varying(2) NOT NULL, name character varying(50), saler numeric(10,2), dept_no character varying(2) ) WITH (STORAGE_TYPE=USTORE); 复制 创建列存表 CREATE TABLE column_table ( id character varying(2) NOT NULL, name character varying(50), saler ...
Indexes: "ubt_idx" ubtree (age) WITH (storage_type=USTORE) TBALESPACE pg_default Has OIDs: no Options: orientation=row, storage_type=ustore, compression=no 创建方式2:创建索引时使用using关键字指定索引类型为“ubtree” openGauss=# create index ubt_idx on test using ubtree(age); openGauss=...
1. openGauss=# \d+ testTable"public.test"Column|Type|Modifiers|Storage|Stats target|Description---+---+---+---+---+---id|integer||plain||age|integer||plain||name|charactervarying(10)||extended||Indexes:"ubt_idx"ubtree(age)WITH(storage_type=USTORE)TBALESPACE pg_default Has OIDs:no...
Table "public.bug" Column | Type | Modifiers | Storage | Stats target | Description ---+---+---+---+---+--- id | integer | | plain | | description | text | | extended | | status | bug_status | | plain | | Has OIDs: no Options: orientation=row, compression=no 可以看到 ...
x: Value can be stored compressed inline or stored in “secondary” storage. 对齐(起始地址需要是某个长度的整数倍) 参考pg_type.typalign c = char alignment, i.e., no alignment needed. s = short alignment (2 bytes on most machines). ...
create tabletest(idint,namevarchar(10))with(storage_type=ustore); * **创建方式2:GUC参数配置指定USTORE存储引擎** 数据库启动之前,在postgresql.conf中设置“enable_default_ustore_table=on”,默认指定用户创建表时使用USTORE存储引擎。 [postgresql.conf配置] ...
STORAGE_TYPE:指定存储引擎类型,该参数设置成功后就不再支持修改。不拉不拉 ,不指定表时,默认是Append-Only存储。因此,由于openGauss建表默认为astore模式,是不支持闪回的。所以,现在需要修改建表脚本为ustore模式。 代码语言:javascript 复制 DROPTABLEIFEXISTStpcds.reason_t2;CREATETABLEtpcds.reason_t2(r_reason_sk...
mydb=#altertablecolumn_taddPARTIAL CLUSTER KEY(id);ALTERTABLEmydb=# \d+column_tTable"public.column_t"Column|Type|Modifiers|Storage|Stats target|Description---+---+---+---+---+---id|integer|notnulldefaultnextval('column_t_id_seq'::regclass)|plain||col1|charactervarying(8)||extended...
然后根据这些信息通过调用RelalionCreateStorage函数创建物理文件。heap_create_with_catalog主要完成表物理文件的创建和表元信息注册到系统表中,涉及系统包包括pg_class,pg_attribute,pg_depend,pg_object,pg_type,pg_index和pg_partition。 附:创建表create table的函数调用栈...
Schema | Name | Type | Owner | Storage ---±---±---±---±--- public | t | table | omm | {orientatinotallow=row,compressinotallow=no} public | tr | table | omm | {orientatinotallow=row,compressinotallow=no} (2 rows) –Session B: openGauss=# \d List of relations Schema...