MDEV-11952 Oracle-style packages: stage#5

- CREATE PACKAGE [BODY] statements are now
  entirely written to mysql.proc with type='PACKAGE' and type='PACKAGE BODY'.
- CREATE PACKAGE BODY now supports IF NOT EXISTS
- DROP PACKAGE BODY now supports IF EXISTS
- CREATE OR REPLACE PACKAGE [BODY] is now supported
- CREATE PACKAGE [BODY] now support the DEFINER clause:

    CREATE DEFINER user@host PACKAGE pkg ... END;
    CREATE DEFINER user@host PACKAGE BODY pkg ... END;

- CREATE PACKAGE [BODY] now supports SQL SECURITY and COMMENT clauses, e.g.:

    CREATE PACKAGE p1 SQL SECURITY INVOKER COMMENT "comment" AS ... END;

- Package routines are now created from the package CREATE PACKAGE BODY
  statement and don't produce individual records in mysql.proc.

- CREATE PACKAGE BODY now supports package-wide variables.
  Package variables can be read and set inside package routines.
  Package variables are stored in a separate sp_rcontext,
  which is cached in THD on the first packate routine call.

- CREATE PACKAGE BODY now supports the initialization section.

- All public routines (i.e. declared in CREATE PACKAGE)
  must have implementations in CREATE PACKAGE BODY

- Only public package routines are available outside of the package

- {CREATE|DROP} PACKAGE [BODY] now respects CREATE ROUTINE and ALTER ROUTINE
  privileges

- "GRANT EXECUTE ON PACKAGE BODY pkg" is now supported

- SHOW CREATE PACKAGE [BODY] is now supported

- SHOW PACKAGE [BODY] STATUS is now supported

- CREATE and DROP for PACKAGE [BODY] now works for non-current databases

- mysqldump now supports packages

- "SHOW {PROCEDURE|FUNCTION) CODE pkg.routine" now works for package routines

- "SHOW PACKAGE BODY CODE pkg" now works (the package initialization section)

- A new package body level MDL was added

- Recursive calls for package procedures are now possible

- Routine forward declarations in CREATE PACKATE BODY are now supported.

- Package body variables now work as SP OUT parameters

- Package body variables now work as SELECT INTO targets

- Package body variables now support ROW, %ROWTYPE, %TYPE

mysql-test/suite/funcs_1/r/is_columns_mysql.result

@@ -154,13 +154,13 @@ def	mysql	proc	security_type	8	'DEFINER'	NO	enum	7	21	NULL	NULL	NULL	utf8	utf8_g
 def	mysql	proc	specific_name	4	''	NO	char	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	char(64)			select,insert,update,references		NEVER	NULL
 def	mysql	proc	sql_data_access	6	'CONTAINS_SQL'	NO	enum	17	51	NULL	NULL	NULL	utf8	utf8_general_ci	enum('CONTAINS_SQL','NO_SQL','READS_SQL_DATA','MODIFIES_SQL_DATA')			select,insert,update,references		NEVER	NULL
 def	mysql	proc	sql_mode	15	''	NO	set	539	1617	NULL	NULL	NULL	utf8	utf8_general_ci	set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','IGNORE_BAD_TABLE_OPTIONS','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB','NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40','ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE','NO_ENGINE_SUBSTITUTION','PAD_CHAR_TO_FULL_LENGTH','EMPTY_STRING_IS_NULL','SIMULTANEOUS_ASSIGNMENT')			select,insert,update,references		NEVER	NULL
-def	mysql	proc	type	3	NULL	NO	enum	9	27	NULL	NULL	NULL	utf8	utf8_general_ci	enum('FUNCTION','PROCEDURE')	PRI		select,insert,update,references		NEVER	NULL
+def	mysql	proc	type	3	NULL	NO	enum	12	36	NULL	NULL	NULL	utf8	utf8_general_ci	enum('FUNCTION','PROCEDURE','PACKAGE','PACKAGE BODY')	PRI		select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	Db	2	''	NO	char	64	192	NULL	NULL	NULL	utf8	utf8_bin	char(64)	PRI		select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	Grantor	6	''	NO	char	141	423	NULL	NULL	NULL	utf8	utf8_bin	char(141)	MUL		select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	Host	1	''	NO	char	60	180	NULL	NULL	NULL	utf8	utf8_bin	char(60)	PRI		select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	Proc_priv	7	''	NO	set	27	81	NULL	NULL	NULL	utf8	utf8_general_ci	set('Execute','Alter Routine','Grant')			select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	Routine_name	4	''	NO	char	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	char(64)	PRI		select,insert,update,references		NEVER	NULL
-def	mysql	procs_priv	Routine_type	5	NULL	NO	enum	9	27	NULL	NULL	NULL	utf8	utf8_bin	enum('FUNCTION','PROCEDURE')	PRI		select,insert,update,references		NEVER	NULL
+def	mysql	procs_priv	Routine_type	5	NULL	NO	enum	12	36	NULL	NULL	NULL	utf8	utf8_bin	enum('FUNCTION','PROCEDURE','PACKAGE','PACKAGE BODY')	PRI		select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	Timestamp	8	current_timestamp()	NO	timestamp	NULL	NULL	NULL	NULL	0	NULL	NULL	timestamp		on update current_timestamp()	select,insert,update,references		NEVER	NULL
 def	mysql	procs_priv	User	3	''	NO	char	80	240	NULL	NULL	NULL	utf8	utf8_bin	char(80)	PRI		select,insert,update,references		NEVER	NULL
 def	mysql	proxies_priv	Grantor	6	''	NO	char	141	423	NULL	NULL	NULL	utf8	utf8_bin	char(141)	MUL		select,insert,update,references		NEVER	NULL
@@ -479,7 +479,7 @@ NULL	mysql	innodb_table_stats	sum_of_other_index_sizes	bigint	NULL	NULL	NULL	NUL
 3.0000	mysql	plugin	dl	varchar	128	384	utf8	utf8_general_ci	varchar(128)
 3.0000	mysql	proc	db	char	64	192	utf8	utf8_bin	char(64)
 3.0000	mysql	proc	name	char	64	192	utf8	utf8_general_ci	char(64)
-3.0000	mysql	proc	type	enum	9	27	utf8	utf8_general_ci	enum('FUNCTION','PROCEDURE')
+3.0000	mysql	proc	type	enum	12	36	utf8	utf8_general_ci	enum('FUNCTION','PROCEDURE','PACKAGE','PACKAGE BODY')
 3.0000	mysql	proc	specific_name	char	64	192	utf8	utf8_general_ci	char(64)
 3.0000	mysql	proc	language	enum	3	9	utf8	utf8_general_ci	enum('SQL')
 3.0000	mysql	proc	sql_data_access	enum	17	51	utf8	utf8_general_ci	enum('CONTAINS_SQL','NO_SQL','READS_SQL_DATA','MODIFIES_SQL_DATA')
@@ -502,7 +502,7 @@ NULL	mysql	proc	modified	timestamp	NULL	NULL	NULL	NULL	timestamp
 3.0000	mysql	procs_priv	Db	char	64	192	utf8	utf8_bin	char(64)
 3.0000	mysql	procs_priv	User	char	80	240	utf8	utf8_bin	char(80)
 3.0000	mysql	procs_priv	Routine_name	char	64	192	utf8	utf8_general_ci	char(64)
-3.0000	mysql	procs_priv	Routine_type	enum	9	27	utf8	utf8_bin	enum('FUNCTION','PROCEDURE')
+3.0000	mysql	procs_priv	Routine_type	enum	12	36	utf8	utf8_bin	enum('FUNCTION','PROCEDURE','PACKAGE','PACKAGE BODY')
 3.0000	mysql	procs_priv	Grantor	char	141	423	utf8	utf8_bin	char(141)
 3.0000	mysql	procs_priv	Proc_priv	set	27	81	utf8	utf8_general_ci	set('Execute','Alter Routine','Grant')
 NULL	mysql	procs_priv	Timestamp	timestamp	NULL	NULL	NULL	NULL	timestamp