https://greatsql.cn/docs/8.0.32-26/5-enhance/5-1-highperf-parallel-load.html greatsql>LOAD/*+ SET_VAR(gdb_parallel_load = ON) SET_VAR(gdb_parallel_load_chunk_size = 65536) SET_VAR(gdb_parallel_load_workers = 16)
-- 1、现有函数逻辑 -- 判断存在表的话(to_regclass (tb_name_partiton_val)),删除两月前的当日分区 drop table if exists ap.fact_ship_20220910; select to_regclass('fact_ship') ; --是否存在此表,不存在返回null,存在返回表名 -- 2、日期 select to_char(date_trunc('day',now())+'-1 day'...
-- get distribution column name for products table SELECT column_to_column_name(logicalrelid, partkey) AS dist_col_name FROM pg_dist_partition WHERE logicalrelid='products'::regclass; 輸出: 複製 ┌───────────────┐│ dist_col_name │├───────────────...
You can also use the pg_attribute table in the system catalog to check which strategy a column uses. Shell 1 2 3 4 5 6 7 8 SELECT attname, attstorage FROM pg_attribute WHERE attrelid = 'tablename'::regclass AND attnum > 0; postgres=# SELECT attname, attstorage FROM pg_attribute ...
---+---+---+--- name | character varying(255) | | not null | id | integer | | not null | nextval('baskets_id_seq'::regclass) Indexes: "baskets_pkey" PRIMARY KEY, btree (id) Summary Use the PostgreSQL pseudo-type SERIAL to create an auto-increment column for a table.Previous...
PostgreSQL中提供了三种实现模式匹配的方法:SQL LIKE操作符,更近一些的SIMILAR TO操作符,和POSIX-风格正则表达式。 1. LIKE: stringLIKEpattern [ESCAPEescape-character ] stringNOT LIKEpattern [ESCAPEescape-character ] 每个pattern定义一个字串的集合。如果该string包含在pattern代表的字串集合里,那么LIKE表达式返回...
ERROR: invalid input syntaxfortype oid:"test_json1"LINE1:selectattname from pg_attribute where attrelid='test_json1'...^postgres=#selectattname from pg_attribute where attrelid='test_json1'::regclass and attnum>0; attname---idname (2rows) ...
问PostgreSQL -使用to_tsvector和SELECTEN我一直在阅读PSQL文档，也困扰着Google --尽管我不知道该寻找...
返回传递给它的值的排序规则的名称to_regclass将文本关系名称转换为其 OIDto_regcollation将文本排序规则...
equip_id | integer | not null default nextval('pg_equipment_equip_id_seq'::regclass) type | character varying(50) | not null color | character varying(25) | not null location | character varying(25) | install_date | date | functioning | boolean | ...