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

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

• 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](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:

  pqErr := pq.As(err, pqerror.UniqueViolation)
  if pqErr != nil {
      log.Fatalf("email %q already exsts", email)
  }
  

Fixes

• Fix SSL key permission check to allow modes stricter than 0600/0640 (#1265).

• Fix Hstore to work with binary parameters (#1278).

• Clearer error when starting a new query while pq is still processing another query (#1272).

• Send intermediate CAs with client certificates, so they can be signed by an intermediate CA (#1267).

• Use time.UTC for UTC aliases such as Etc/UTC (#1283).

This fixes two regressions:

• Don't send startup parameters if there is no value, improving compatibility with Supavisor (#1260).

• Don't send dbname as a startup parameter if database=[..] is used in the connection string. It's recommended to use dbname=, as database= is not a libpq option, and only worked by accident previously. (#1261)

This fixes two regressions present in the v1.11.0 release:

• Fix build on 32bit systems, Windows, and Plan 9 (#1253).

• Named []byte types and pointers to []byte (e.g. *[]byte, json.RawMessage) would be treated as an array instead of bytea (#1252).

This version of pq requires Go 1.21 or newer.

pq now supports only maintained PostgreSQL releases, which is PostgreSQL 14 and newer. Previously PostgreSQL 8.4 and newer were supported.

Features

• The pq.Error.Error() text includes the position of the error (if reported by PostgreSQL) and SQLSTATE code (#1219, #1224):

  pq: column "columndoesntexist" does not exist at column 8 (42703)
  pq: syntax error at or near ")" at position 2:71 (42601)
  

• The pq.Error.ErrorWithDetail() method prints a more detailed multiline message, with the Detail, Hint, and error position (if any) (#1219):

  ERROR:   syntax error at or near ")" (42601)
  CONTEXT: line 12, column 1:
  
       10 |     name           varchar,
       11 |     version        varchar,
       12 | );
            ^
  

• Add Config, NewConfig(), and NewConnectorConfig() to supply connection details in a more structured way (#1240).

• Support hostaddr and $PGHOSTADDR (#1243).

• Support multiple values in host, port, and hostaddr, which are each tried in order, or randomly if load_balance_hosts=random is set (#1246).

• Support target_session_attrs connection parameter (#1246).

• Support sslnegotiation to use SSL without negotiation (#1180).

• Allow using a custom tls.Config, for example for encrypted keys (#1228).

• Add PQGO_DEBUG=1 print the communication with PostgreSQL to stderr, to aid in debugging, testing, and bug reports (#1223).

• Add support for NamedValueChecker interface (#1125, #1238).

Fixes

• Match HOME directory lookup logic with libpq: prefer $HOME over /etc/passwd, ignore ENOTDIR errors, and use APPDATA on Windows (#1214).

• Fix sslmode=verify-ca verifying the hostname anyway when connecting to a DNS name (rather than IP) (#1226).

• Correctly detect pre-protocol errors such as the server not being able to fork or running out of memory (#1248).

• Fix build with wasm (#1184), appengine (#745), and Plan 9 (#1133).

• Deprecate and type alias pq.NullTime to sql.NullTime (#1211).

• Enforce integer limits of the Postgres wire protocol (#1161).

• Accept the passfile connection parameter to override PGPASSFILE (#1129).

• Fix connecting to socket on Windows systems (#1179).

• Don't perform a permission check on the .pgpass file on Windows (#595).

• Warn about incorrect .pgpass permissions (#595).

• Don't set extra_float_digits (#1212).

• Decode bpchar into a string (#949).

• Fix panic in Ping() by not requiring CommandComplete or EmptyQueryResponse in simpleQuery() (#1234)

• Recognize bit/varbit (#743) and float types (#1166) in ColumnTypeScanType().

• Accept PGGSSLIB and PGKRBSRVNAME environment variables (#1143).

• Handle ErrorResponse in readReadyForQuery and return proper error (#1136).

• CopyIn() and CopyInSchema() now work if the list of columns is empty, in which case it will copy all columns (#1239).

• Treat nil []byte in query parameters as nil/NULL rather than "" (#838).

• Accept multiple authentication methods before checking AuthOk, which improves compatibility with PgPool-II (#1188).

• Fixes backwards incompat bug with 1.13.
• Fixes pgpass issue

• Keep track of (context cancelled) error on connection.
• Fix android build

• implement ConnPrepareContext/StmtQueryContext/StmtExecContext interfaces (context.Cancel() now ends connections)
• Avoid type assertion to the same type
• Fix build for illumos and solaris

• fix TimeTZ with second offsets
• fix GOOS compilation

• fix concurrent map write