Update copyright for 2021

Backpatch-through: 9.5

src/backend/parser/analyze.c

@@ -14,7 +14,7 @@
  * contain optimizable statements, which we should transform.
  *
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *	src/backend/parser/analyze.c

src/backend/parser/check_keywords.pl

@@ -4,7 +4,7 @@
 # Usage: check_keywords.pl gram.y kwlist.h
 
 # src/backend/parser/check_keywords.pl
-# Copyright (c) 2009-2020, PostgreSQL Global Development Group
+# Copyright (c) 2009-2021, PostgreSQL Global Development Group
 
 use strict;
 use warnings;

src/backend/parser/gram.y

@@ -6,7 +6,7 @@
  * gram.y
  *	  POSTGRESQL BISON rules/actions
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_agg.c

@@ -3,7 +3,7 @@
  * parse_agg.c
  *	  handle aggregates and window functions in parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_clause.c

@@ -3,7 +3,7 @@
  * parse_clause.c
  *	  handle clauses in parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_coerce.c

@@ -3,7 +3,7 @@
  * parse_coerce.c
  *		handle type coercions/conversions for parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_collate.c

@@ -29,7 +29,7 @@
  * at runtime.  If we knew exactly which functions require collation
  * information, we could throw those errors at parse time instead.
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_cte.c

@@ -3,7 +3,7 @@
  * parse_cte.c
  *	  handle CTEs (common table expressions) in parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_enr.c

@@ -3,7 +3,7 @@
  * parse_enr.c
  *	  parser support routines dealing with ephemeral named relations
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_expr.c

@@ -3,7 +3,7 @@
  * parse_expr.c
  *	  handle expressions in parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_func.c

@@ -3,7 +3,7 @@
  * parse_func.c
  *		handle function calls in parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_node.c

@@ -3,7 +3,7 @@
  * parse_node.c
  *	  various routines that make nodes for querytrees
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_oper.c

@@ -3,7 +3,7 @@
  * parse_oper.c
  *		handle operator things for parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_param.c

@@ -12,7 +12,7 @@
  * Note that other approaches to parameters are possible using the parser
  * hooks defined in ParseState.
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_relation.c

@@ -3,7 +3,7 @@
  * parse_relation.c
  *	  parser support routines dealing with relations
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_target.c

@@ -3,7 +3,7 @@
  * parse_target.c
  *	  handle target lists
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_type.c

@@ -3,7 +3,7 @@
  * parse_type.c
  *		handle type operations for parser
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/parser/parse_utilcmd.c

@@ -16,7 +16,7 @@
  * a quick copyObject() call before manipulating the query tree.
  *
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *	src/backend/parser/parse_utilcmd.c

src/backend/parser/parser.c

@@ -10,7 +10,7 @@
  * analyze.c and related files.
  *
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/parser/scan.l

@@ -22,7 +22,7 @@
  * Postgres 9.2, this check is made automatically by the Makefile.)
  *
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/parser/scansup.c

@@ -3,7 +3,7 @@
  * scansup.c
  *	  scanner support routines used by the core lexer
  *
- * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *