차례
테이블
COMMUTATOR
NEGATOR
RESTRICT
JOIN
HASHES
MERGES
In the sections that follow, we will discuss how you can extend the PostgreSQL SQL query language by adding:
functions (starting in 38.3절)
aggregates (starting in 38.11절)
data types (starting in 38.12절)
operators (starting in 38.13절)
operator classes for indexes (starting in 38.15절)
packages of related objects (starting in 38.16절)