/ ./kysely-db.d.ts import type { ColumnType } from 'kysely';export type Generated = T extends ColumnType ? ColumnType : ColumnType ;export interface Users { country: string | null; email: string; first_name: string; id: Generated ; last_name: string;}export interface DB { ...
ERROR: cannot alter type of a column used by a view or rule DETAIL: rule _RETURN on view vw_t depends on column "t" > ALTER TABLE t ALTER COLUMN pk TYPE bigint; ERROR: cannot alter type of a column used by a view or rule DETAIL: rule _RETURN on view vw_t depends on column ...
hrdb=# COMMENTONCOLUMNtab_num.v5IS'大整型最小范围'; COMMENT hrdb=# COMMENTONCOLUMNtab_num.v6IS'大整型最大范围'; COMMENT hrdb=#--描述数据类型 hrdb=# \d+ tab_num Table"public.tab_num" Column| Type | Collation | Nullable |Default| Storage | Stats target | Description ---+---+---+...
postgres=# select datname,datdba,enconding,datlastsysoid,datfrozenxid,datminmxid,dattablespace from pg_database; ERROR: column "enconding" does not exist LINE 1: select datname,datdba,enconding,datlastsysoid,datfrozenxid,d... ^ HINT: Perhaps you meant to reference the column "pg_data...
Column | Type | Modifiers ---+---+--- col | text | col_asc | integer | col_desc | integer | col_rand | integer | data | text | Indexes: "tbl_corr_asc_idx" btree (col_asc) "tbl_corr_desc_idx" btree (col_desc) "tbl_corr_rand_idx" btree (col...
CREATE[ORREPLACE]FUNCTIONname([[argmode][argname]argtype[{DEFAULT|=}default_expr][,...]])[RETURNSrettype|RETURNSTABLE(column_name column_type[,...])]{LANGUAGElang_name|TRANSFORM{FORTYPEtype_name}[,...]|WINDOW|IMMUTABLE|STABLE|VOLATILE|[NOT]LEAKPROOF|CALLEDONNULLINPUT|RETURNSNULLONNULLINPUT|...
column_type- RETURNS TABLE 語法中輸出資料行的資料類型。 lang_name- 用來寫入程序的語言。 如果已指定 sql_body,則預設值為 sql。 可以是 sql、c、internal 或使用者定義程序性語言的名稱,例如 plpgsql。 使用關鍵字 IMMUTABLE、STABLE 或 VOLATILE 作為關於函式之查詢最佳化工具的提示。 VO...
test=# \d+ student; Table "public.student" Column | Type | Collation | Nullable | Default | Storage | Stats target | Description ---+---+---+---+---+---+---+--- id | integer | | not null | nextval('student_id_seq'::regclass) | plain | | name | character varying(10...
也可以随时更高列的存储策略,尽管可能会影响查询的性能和表的大小。因此,强烈建议在确定最佳策略之前测试不同的策略。 原文 https://www.percona.com/blog/unlocking-the-secrets-of-toast-how-to-optimize-large-column-storage-in-postgresql-for-top-performance-and-scalability/...
This document discusses PostgreSQL Data Types. While creating table, for each column, you specify a data type, i.e. what kind of data you want to store.