It is very common to hear the term major or minor version upgrade in Postgres.
Up to the major PostgreSQL version 9.6, the first two digits of the version number are considered the major version. Starting from PostgreSQL 10, the first digit of the version number is termed as the major version. Similarly, the third digit of the version number is considered as the minor version until 9.6, while the second digit is considered as the minor version starting from PostgreSQL 10.
For example, if the PostgreSQL version is 9.6.5, 9.6 is the major version and 5 is the minor version number. If the version of PostgreSQL is 13.2, 13 is the major version and 2 is the minor version of major version 13. Thus, PostgreSQL 10.x, 11.x, 12.x, and 13.x are considered to be the major versions of PostgreSQL.
A minor release (or version) in PostgreSQL usually includes patches for bugs, fixes to security vulnerabilities, or improvements to...
