drop_type.hlp

来自「关系型数据库 Postgresql 6.5.2」· HLP 代码 · 共 21 行

.pgaw:Help.f.t insert end "DROP TYPE" {bold} " will remove a user type from the system catalogs. 

" {} "Synopsis" {bold} "

DROP TYPE typename

" {} "Usage" {bold} "

To remove the box type: 

DROP TYPE box

" {} "Notes" {bold} "

DROP TYPE statement is a Postgres language extension. 

Refer to CREATE TYPE for inforamation on how to create types. 

It is the user's responsibility to remove any operators, functions, aggregates, access methods, subtypes, and classes that use a deleted type. 
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