I
- debug_io_direct
- ichar()
- icu_unicode_version()
- icu_validation_level
- ident_file
- IDENTIFY_SYSTEM
- idle_in_transaction_session_timeout
- idle_session_timeout
- ignore_checksum_failure
- ignore_invalid_pages
- ignore_system_indexes
- IMPORT FOREIGN SCHEMA
- include
- include_dir
- include_if_exists
- inet_client_addr()
- inet_client_port()
- inet_merge()
- inet_same_family()
- inet_server_addr()
- inet_server_port()
- 信息模式
- in_hot_standby
- initcap()
- initdb
- 初始化分叉
- intagg
- intarray
- integer_datetimes
- IntervalStyle
- io_combine_limit
- isbn_issn
- isempty()
- isn
- 隔离测试器
- is_superuser