Postgresql-server 可以直接从 9.2 升级到 9.6 吗？
Can you upgrade Postresql-server directly from 9.2 to 9.6?
能否将Postgresql-server从9.2直接升级到9.6？ （运行 在 RHEL 7 上）
是：
https://www.postgresql.org/docs/9.6/static/pgupgrade.html
pg_upgrade supports upgrades from 8.4.X and later to the current major
release of PostgreSQL, including snapshot and alpha releases.
https://www.postgresql.org/docs/9.6/static/app-pgdump.html
Because pg_dump is used to transfer data to newer versions of
PostgreSQL, the output of pg_dump can be expected to load into
PostgreSQL server versions newer than pg_dump's version. pg_dump can
also dump from PostgreSQL servers older than its own version.
(Currently, servers back to version 7.0 are supported.) However,
pg_dump cannot dump from PostgreSQL servers newer than its own major
version; it will refuse to even try, rather than risk making an
invalid dump.
我的重点
能否将Postgresql-server从9.2直接升级到9.6？ （运行 在 RHEL 7 上）
是：
https://www.postgresql.org/docs/9.6/static/pgupgrade.html
pg_upgrade supports upgrades from 8.4.X and later to the current major release of PostgreSQL, including snapshot and alpha releases.
https://www.postgresql.org/docs/9.6/static/app-pgdump.html
Because pg_dump is used to transfer data to newer versions of PostgreSQL, the output of pg_dump can be expected to load into PostgreSQL server versions newer than pg_dump's version. pg_dump can also dump from PostgreSQL servers older than its own version. (Currently, servers back to version 7.0 are supported.) However, pg_dump cannot dump from PostgreSQL servers newer than its own major version; it will refuse to even try, rather than risk making an invalid dump.
我的重点