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 37.3절)
aggregates (starting in 37.10절)
data types (starting in 37.11절)
operators (starting in 37.12절)
operator classes for indexes (starting in 37.14절)
packages of related objects (starting in 37.15절)