Update copyrights for 2020

Backpatch-through: update all files in master, backpatch legal files through 9.4

src/backend/commands/aggregatecmds.c

@@ -4,7 +4,7 @@
  *
  *	  Routines for aggregate-manipulation commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/alter.c

@@ -3,7 +3,7 @@
  * alter.c
  *	  Drivers for generic alter commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/amcmds.c

@@ -3,7 +3,7 @@
  * amcmds.c
  *	  Routines for SQL commands that manipulate access methods.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/analyze.c

@@ -3,7 +3,7 @@
  * analyze.c
  *	  the Postgres statistics generator
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/async.c

@@ -3,7 +3,7 @@
  * async.c
  *	  Asynchronous notification: NOTIFY, LISTEN, UNLISTEN
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/cluster.c

@@ -6,7 +6,7 @@
  * There is hardly anything left of Paul Brown's original implementation...
  *
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994-5, Regents of the University of California
  *
  *

src/backend/commands/collationcmds.c

@@ -3,7 +3,7 @@
  * collationcmds.c
  *	  collation-related commands support code
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/comment.c

@@ -4,7 +4,7 @@
  *
  * PostgreSQL object comments utility code.
  *
- * Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Copyright (c) 1996-2020, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
  *	  src/backend/commands/comment.c

src/backend/commands/constraint.c

@@ -3,7 +3,7 @@
  * constraint.c
  *	  PostgreSQL CONSTRAINT support code.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/conversioncmds.c

@@ -3,7 +3,7 @@
  * conversioncmds.c
  *	  conversion creation command support code
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/copy.c

@@ -3,7 +3,7 @@
  * copy.c
  *		Implements the COPY utility command
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/createas.c

@@ -13,7 +13,7 @@
  * we must return a tuples-processed count in the completionTag.  (We no
  * longer do that for CTAS ... WITH NO DATA, however.)
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/dbcommands.c

@@ -8,7 +8,7 @@
  * stepping on each others' toes.  Formerly we used table-level locks
  * on pg_database, but that's too coarse-grained.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/define.c

@@ -4,7 +4,7 @@
  *	  Support routines for various kinds of object creation.
  *
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/discard.c

@@ -3,7 +3,7 @@
  * discard.c
  *	  The implementation of the DISCARD command
  *
- * Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Copyright (c) 1996-2020, PostgreSQL Global Development Group
  *
  *
  * IDENTIFICATION

src/backend/commands/dropcmds.c

@@ -3,7 +3,7 @@
  * dropcmds.c
  *	  handle various "DROP" operations
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/event_trigger.c

@@ -3,7 +3,7 @@
  * event_trigger.c
  *	  PostgreSQL EVENT TRIGGER support code.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/explain.c

@@ -3,7 +3,7 @@
  * explain.c
  *	  Explain query execution plans
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994-5, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/extension.c

@@ -12,7 +12,7 @@
  * postgresql.conf.  An extension also has an installation script file,
  * containing SQL commands to create the extension's objects.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/foreigncmds.c

@@ -3,7 +3,7 @@
  * foreigncmds.c
  *	  foreign-data wrapper/server creation/manipulation commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  *
  *
  * IDENTIFICATION

src/backend/commands/functioncmds.c

@@ -5,7 +5,7 @@
  *	  Routines for CREATE and DROP FUNCTION commands and CREATE and DROP
  *	  CAST commands.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/indexcmds.c

@@ -3,7 +3,7 @@
  * indexcmds.c
  *	  POSTGRES define and remove index code.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/lockcmds.c

@@ -3,7 +3,7 @@
  * lockcmds.c
  *	  LOCK command support code
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/matview.c

@@ -3,7 +3,7 @@
  * matview.c
  *	  materialized view support
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/opclasscmds.c

@@ -4,7 +4,7 @@
  *
  *	  Routines for opclass (and opfamily) manipulation commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/operatorcmds.c

@@ -4,7 +4,7 @@
  *
  *	  Routines for operator manipulation commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/policy.c

@@ -3,7 +3,7 @@
  * policy.c
  *	  Commands for manipulating policies.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * src/backend/commands/policy.c

src/backend/commands/portalcmds.c

@@ -9,7 +9,7 @@
  * storage management for portals (but doesn't run any queries in them).
  *
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/prepare.c

@@ -7,7 +7,7 @@
  * accessed via the extended FE/BE query protocol.
  *
  *
- * Copyright (c) 2002-2019, PostgreSQL Global Development Group
+ * Copyright (c) 2002-2020, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
  *	  src/backend/commands/prepare.c

src/backend/commands/proclang.c

@@ -3,7 +3,7 @@
  * proclang.c
  *	  PostgreSQL LANGUAGE support code.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/publicationcmds.c

@@ -3,7 +3,7 @@
  * publicationcmds.c
  *		publication manipulation
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/schemacmds.c

@@ -3,7 +3,7 @@
  * schemacmds.c
  *	  schema creation/manipulation commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/seclabel.c

@@ -3,7 +3,7 @@
  * seclabel.c
  *	  routines to support security label feature.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * -------------------------------------------------------------------------

src/backend/commands/sequence.c

@@ -3,7 +3,7 @@
  * sequence.c
  *	  PostgreSQL sequences support code.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/statscmds.c

@@ -3,7 +3,7 @@
  * statscmds.c
  *	  Commands for creating and altering extended statistics objects
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/subscriptioncmds.c

@@ -3,7 +3,7 @@
  * subscriptioncmds.c
  *		subscription catalog manipulation functions
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/tablecmds.c

@@ -3,7 +3,7 @@
  * tablecmds.c
  *	  Commands for creating and altering table structures and settings
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/tablespace.c

@@ -35,7 +35,7 @@
  * and munge the system catalogs of the new database.
  *
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/trigger.c

@@ -3,7 +3,7 @@
  * trigger.c
  *	  PostgreSQL TRIGGERs support code.
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/commands/tsearchcmds.c

@@ -4,7 +4,7 @@
  *
  *	  Routines for tsearch manipulation commands
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/typecmds.c

@@ -3,7 +3,7 @@
  * typecmds.c
  *	  Routines for SQL commands that manipulate types (and domains).
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/user.c

@@ -3,7 +3,7 @@
  * user.c
  *	  Commands for manipulating roles (formerly called users).
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * src/backend/commands/user.c

src/backend/commands/vacuum.c

@@ -9,7 +9,7 @@
  * in cluster.c.
  *
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/variable.c

@@ -4,7 +4,7 @@
  *		Routines for handling specialized SET variables.
  *
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/commands/view.c

@@ -3,7 +3,7 @@
  * view.c
  *	  use rewrite rules to construct views
  *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *