CREATE[UNIQUE]INDEX[CONCURRENTLY][[IFNOTEXISTS]name]ON[ONLY]table_name[USINGmethod]({column_name|(expression)}[COLLATEcollation][opclass[(opclass_parameter=value[,...])]][ASC|DESC][NULLS{FIRST|LAST}][,...])[INCLUDE(column_name[,...])][WITH(storage_parameter[=value][,...])][TABLESP...
4.创建索引 --建普通索引(索引名通常为 idx_表名_字段名)CREATEINDEXIFNOTEXISTSidx_my_table_ageONmy_table USING btree (age);--建唯一索引CREATEUNIQUEINDEXCONCURRENTLYIFNOTEXISTSidx_unique_my_table_idONmy_table (id);--组合索引CREATEINDEXIFNOTEXISTSindex_nameONtable_name (column1_name, column2_nam...
CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ [ IF NOT EXISTS ] name ] ON [ ONLY ] table_name [ USING method ] ( { column_name | ( expression ) } [ COLLATE collation ] [ opclass [ ( opclass_parameter = value [, ... ] ) ] ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ...
CREATE UNIQUE INDEX ind_t_id_1 on t (id); 2. 关键字【CONCURRENTLY】 # 这是并发创建索引。跟oracle的online创建索引作用是一样的。创建索引过程中;不会阻塞表更新,插入,删除操作。当然创建的时间就会很漫长。 CREATE INDEX CONCURRENTLY ind_t_id_2 on t (id); 3. 关键字【IF NOT EXISTS】 #用该...
("CreateTime"); CREATE UNIQUE INDEX IF NOT EXISTS u_idx_AdsARH_CT_N ON "o"."A"("CreateTime","Number"); CREATE INDEX if not exists idx_AdsARH_AdsCId_AdsAId ON "orders"."A" USING btree ("CId","AId"); --add partition DO $do$ DECLARE r_year record; r_month record; v_...
CREATE UNIQUE INDEX uk_emp_stat_mv ON emp_stat_mv(department_name, job_title); 刷新物化视图 PostgreSQL 物化视图不会自动刷新数据,需要手动执行 REFRESH MATERIALIZED VIEW 语句: REFRESH MATERIALIZED VIEW [ CONCURRENTLY ] name [ WITH [ NO ] DATA ]; 其中,CONCURRENTLY 可以支持刷新物化视图时其他连接的...
When I create this table, the primary key (variable_id, timestamp) creates a unique constraint with a unique index. My problem is that the default index is ordered ASC. I need to add another index like this CREATE UNIQUE INDEX IF NOT EXISTS _index_measure_timestamp_variable ON measures ...
-- 创建索引 CREATE INDEX IF NOT EXISTS {index_name} ON {table_name} USING btree ({column_name}); -- Query the indexes of a table -- table_name,表名 SELECT * FROM pg_indexes WHERE tablename IN ('{table_name}'); -- 查询所有索引 SELECT i.relname AS indname , i.relowner AS in...
CREATE EXTENSION IF NOT EXISTS btree_gin; CREATE EXTENSION IF NOT EXISTS pg_trgm; CREATE INDEX index_users_on_email_gin ON users USING gin (email gin_trgm_ops); 让我们重新运行我们的查询: EXPLAIN ANALYZE SELECT * FROM users WHERE email LIKE '%@example.com'; 代码语言:javascript 代码运行次数...
CREATE UNIQUE INDEX CONCURRENTLY vvvv ON vvv(aid) 再次查询可以看到物化视图与基表同步了: 四, 物化视图的自动刷新 物化视图的自动更新需要安装一些特殊的插件例如Apache iceberg(冰山)或者是自己手动创建触发器函数+触发器这样的形式,本例中是触发器函数+触发器 ...