Sourced from github.com/lib/pq's releases.

v1.12.3

• Send datestyle startup parameter, improving compatbility with database engines that use a different default datestyle such as EnterpriseDB (#1312).

#1312: lib/pq#1312

v1.12.2

• Treat io.ErrUnexpectedEOF as driver.ErrBadConn so database/sql discards the connection. Since v1.12.0 this could result in permanently broken connections, especially with CockroachDB which frequently sends partial messages (#1299).

#1299: lib/pq#1299

v1.12.1

• Look for pgpass file in ~/.pgpass instead of ~/.postgresql/pgpass (#1300).

• Don't clear password if directly set on pq.Config (#1302).

#1300: lib/pq#1300 #1302: lib/pq#1302

v1.12.0

• The next release may change the default sslmode from require to prefer. See #1271 for details.

• CopyIn() and CopyInToSchema() have been marked as deprecated. These are simple query builders and not needed for COPY [..] FROM STDIN support (which is not deprecated). (#1279)

  // Old
  tx.Prepare(CopyIn("temp", "num", "text", "blob", "nothing"))
  // Replacement
  tx.Prepare(copy temp (num, text, blob, nothing) from stdin)
  

Features

• Support protocol 3.2, and the min_protocol_version and max_protocol_version DSN parameters (#1258).

• Support sslmode=prefer and sslmode=allow (#1270).

• Support ssl_min_protocol_version and ssl_max_protocol_version (#1277).

• Support connection service file to load connection details (#1285).

• Support sslrootcert=system and use ~/.postgresql/root.crt as the default value of sslrootcert (#1280, #1281).

• Add a new pqerror package with PostgreSQL error codes (#1275).

  For example, to test if an error is a UNIQUE constraint violation:

  if pqErr, ok := errors.AsType[*pq.Error](https://github.com/lib/pq/blob/HEAD/err); ok && pqErr.Code == pqerror.UniqueViolation {
      log.Fatalf("email %q already exsts", email)
  }
  

  To make this a bit more convenient, it also adds a pq.As() function:

... (truncated)

Sourced from github.com/lib/pq's changelog.

v1.12.3 (2026-04-03)

• Send datestyle startup parameter, improving compatbility with database engines that use a different default datestyle such as EnterpriseDB (#1312).

#1312: lib/pq#1312

v1.12.2 (2026-04-02)

• Treat io.ErrUnexpectedEOF as driver.ErrBadConn so database/sql discards the connection. Since v1.12.0 this could result in permanently broken connections, especially with CockroachDB which frequently sends partial messages (#1299).

#1299: lib/pq#1299

v1.12.1 (2026-03-30)

• Look for pgpass file in ~/.pgpass instead of ~/.postgresql/pgpass (#1300).

• Don't clear password if directly set on pq.Config (#1302).

#1300: lib/pq#1300 #1302: lib/pq#1302

v1.12.0 (2026-03-18)

• The next release may change the default sslmode from require to prefer. See #1271 for details.

• CopyIn() and CopyInToSchema() have been marked as deprecated. These are simple query builders and not needed for COPY [..] FROM STDIN support (which is not deprecated). (#1279)

  // Old
  tx.Prepare(CopyIn("temp", "num", "text", "blob", "nothing"))
  // Replacement
  tx.Prepare(copy temp (num, text, blob, nothing) from stdin)
  

Features

• Support protocol 3.2, and the min_protocol_version and max_protocol_version DSN parameters (#1258).

• Support sslmode=prefer and sslmode=allow (#1270).

• Support ssl_min_protocol_version and ssl_max_protocol_version (#1277).

... (truncated)

• 1f3e3d9 Send datestyle as a startup parameter (#1312)
• 32ba56b Expand tests for multiple result sets
• c2cfac1 Release v1.12.2
• 859f104 Test CockroachDB
• 12e464c Allow multiple matches and regexps in pqtest.ErrorContains()
• 6d77ced Treat io.ErrUnexpectedEOF as driver.ErrBadConn in handleError
• 71daecb Ensure transactions are closed in pqtest
• 8f44823 Set PGAPPNAME for tests
• 4af2196 Fix healthcheck
• 38a54e4 Split out testdata/init a bit
• Additional commits viewable in compare view