WL#6454: Deprecate SHOW AUTHORS and SHOW CONTRIBUTORS

Added deprecation warning for SHOW AUTHORS and
SHOW CONTRIBUTORS.

This is the 5.5 version of the patch.

mysql-test/r/contributors.result

@@ -3,3 +3,5 @@ Name	Location	Comment
 Ronald Bradford	Brisbane, Australia	EFF contribution for UC2006 Auction
 Sheeri Kritzer	Boston, Mass. USA	EFF contribution for UC2006 Auction
 Mark Shuttleworth	London, UK.	EFF contribution for UC2006 Auction
+Warnings:
+Warning	1681	'SHOW CONTRIBUTORS' is deprecated and will be removed in a future release.

mysql-test/r/show_check.result

@@ -1552,3 +1552,14 @@ RELEASE_LOCK('t')
 óóóó
 1
 SET NAMES latin1;
+#
+# WL#6454: Deprecate SHOW AUTHORS and SHOW CONTRIBUTORS
+#
+SHOW AUTHORS;
+SHOW WARNINGS;
+Level	Code	Message
+Warning	1681	'SHOW AUTHORS' is deprecated and will be removed in a future release.
+SHOW CONTRIBUTORS;
+SHOW WARNINGS;
+Level	Code	Message
+Warning	1681	'SHOW CONTRIBUTORS' is deprecated and will be removed in a future release.

mysql-test/t/show_check.test

@@ -1371,3 +1371,17 @@ SELECT RELEASE_LOCK('t');
 --connection default
 SET NAMES latin1;
 
+
+--echo #
+--echo # WL#6454: Deprecate SHOW AUTHORS and SHOW CONTRIBUTORS
+--echo #
+
+--disable_result_log
+SHOW AUTHORS;
+--enable_result_log
+SHOW WARNINGS;
+
+--disable_result_log
+SHOW CONTRIBUTORS;
+--enable_result_log
+SHOW WARNINGS;

sql/sql_yacc.yy

@@ -11010,11 +11010,19 @@ show_param:
           {
             LEX *lex=Lex;
             lex->sql_command= SQLCOM_SHOW_AUTHORS;
+            push_warning_printf(YYTHD, MYSQL_ERROR::WARN_LEVEL_WARN,
+                                ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT,
+                                ER(ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT),
+                                "SHOW AUTHORS");
           }
         | CONTRIBUTORS_SYM
           {
             LEX *lex=Lex;
             lex->sql_command= SQLCOM_SHOW_CONTRIBUTORS;
+            push_warning_printf(YYTHD, MYSQL_ERROR::WARN_LEVEL_WARN,
+                                ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT,
+                                ER(ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT),
+                                "SHOW CONTRIBUTORS");
           }
         | PRIVILEGES
           {