FM / private

/usr/include/mysql/server/private

Name	Size	Mode	Actions
atomic/	-	0755	rm
data/	-	0755	rm
providers/	-	0755	rm
aligned.h	1136	0644	edit dl rm
aria_backup.h	1787	0644	edit dl rm
assume_aligned.h	2350	0644	edit dl rm
authors.h	10141	0644	edit dl rm
backup.h	1703	0644	edit dl rm
bounded_queue.h	6093	0644	edit dl rm
client_settings.h	1935	0644	edit dl rm
compat56.h	2280	0644	edit dl rm
config.h	14543	0644	edit dl rm
contributors.h	4878	0644	edit dl rm
create_options.h	4193	0644	edit dl rm
create_tmp_table.h	2808	0644	edit dl rm
cset_narrowing.h	3968	0644	edit dl rm
custom_conf.h	1082	0644	edit dl rm
datadict.h	1700	0644	edit dl rm
ddl_log.h	12807	0644	edit dl rm
debug.h	1234	0644	edit dl rm
debug_sync.h	2046	0644	edit dl rm
derived_handler.h	2379	0644	edit dl rm
derror.h	980	0644	edit dl rm
des_key_file.h	1236	0644	edit dl rm
discover.h	1570	0644	edit dl rm
dur_prop.h	1082	0644	edit dl rm
embedded_priv.h	1733	0644	edit dl rm
events.h	4704	0644	edit dl rm
event_data_objects.h	4187	0644	edit dl rm
event_db_repository.h	3648	0644	edit dl rm
event_parse_data.h	2899	0644	edit dl rm
event_queue.h	3438	0644	edit dl rm
event_scheduler.h	3290	0644	edit dl rm
field.h	222336	0644	edit dl rm
field_comp.h	1174	0644	edit dl rm
filesort.h	7283	0644	edit dl rm
filesort_utils.h	8195	0644	edit dl rm
ft_global.h	3113	0644	edit dl rm
gcalc_slicescan.h	17272	0644	edit dl rm
gcalc_tools.h	11900	0644	edit dl rm
grant.h	2758	0644	edit dl rm
group_by_handler.h	3534	0644	edit dl rm
gstream.h	2437	0644	edit dl rm
handler.h	199730	0644	edit dl rm
handle_connections_win.h	884	0644	edit dl rm
hash.h	4452	0644	edit dl rm
hash_filo.h	5688	0644	edit dl rm
ha_handler_stats.h	2335	0644	edit dl rm
ha_partition.h	64696	0644	edit dl rm
ha_sequence.h	6245	0644	edit dl rm
heap.h	9480	0644	edit dl rm
hostname.h	5419	0644	edit dl rm
ilist.h	7237	0644	edit dl rm
init.h	852	0644	edit dl rm
innodb_priv.h	1319	0644	edit dl rm
item.h	283188	0644	edit dl rm
item_cmpfunc.h	135071	0644	edit dl rm
item_create.h	11508	0644	edit dl rm
item_func.h	138638	0644	edit dl rm
item_geofunc.h	39612	0644	edit dl rm
item_jsonfunc.h	25264	0644	edit dl rm
item_row.h	5229	0644	edit dl rm
item_strfunc.h	74995	0644	edit dl rm
item_subselect.h	59028	0644	edit dl rm
item_sum.h	72695	0644	edit dl rm
item_timefunc.h	65896	0644	edit dl rm
item_vers.h	4413	0644	edit dl rm
item_windowfunc.h	34556	0644	edit dl rm
item_xmlfunc.h	4650	0644	edit dl rm
json_table.h	9667	0644	edit dl rm
key.h	2132	0644	edit dl rm
keycaches.h	1995	0644	edit dl rm
lex.h	29840	0644	edit dl rm
lex_charset.h	24313	0644	edit dl rm
lex_hash.h	143108	0644	edit dl rm
lex_ident.h	2122	0644	edit dl rm
lex_string.h	4077	0644	edit dl rm
lex_symbol.h	1323	0644	edit dl rm
lex_token.h	42641	0644	edit dl rm
lf.h	6462	0644	edit dl rm
lock.h	2220	0644	edit dl rm
log.h	46370	0644	edit dl rm
log_event.h	189106	0644	edit dl rm
log_event_data_type.h	1890	0644	edit dl rm
log_event_old.h	19830	0644	edit dl rm
log_slow.h	2442	0644	edit dl rm
maria.h	5872	0644	edit dl rm
mariadb.h	1277	0644	edit dl rm
mdl.h	38503	0644	edit dl rm
mem_root_array.h	7106	0644	edit dl rm
message.h	1195	0644	edit dl rm
multi_range_read.h	23179	0644	edit dl rm
myisam.h	17506	0644	edit dl rm
myisamchk.h	4734	0644	edit dl rm
myisammrg.h	4897	0644	edit dl rm
myisampack.h	14929	0644	edit dl rm
mysqld.h	41063	0644	edit dl rm
mysqld_default_groups.h	204	0644	edit dl rm
mysqld_suffix.h	1201	0644	edit dl rm
mysys_err.h	3022	0644	edit dl rm
my_alarm.h	2429	0644	edit dl rm
my_apc.h	4747	0644	edit dl rm
my_atomic.h	7281	0644	edit dl rm
my_atomic_wrapper.h	3051	0644	edit dl rm
my_base.h	27656	0644	edit dl rm
my_bit.h	6196	0644	edit dl rm
my_bitmap.h	5502	0644	edit dl rm
my_check_opt.h	2618	0644	edit dl rm
my_compare.h	11194	0644	edit dl rm
my_counter.h	1721	0644	edit dl rm
my_cpu.h	4855	0644	edit dl rm
my_crypt.h	904	0644	edit dl rm
my_decimal.h	14489	0644	edit dl rm
my_default.h	1880	0644	edit dl rm
my_handler_errors.h	4882	0644	edit dl rm
my_json_writer.h	18573	0644	edit dl rm
my_libwrap.h	1183	0644	edit dl rm
my_md5.h	1486	0644	edit dl rm
my_minidump.h	848	0644	edit dl rm
my_nosys.h	1438	0644	edit dl rm
my_rdtsc.h	10119	0644	edit dl rm
my_rnd.h	1014	0644	edit dl rm
my_service_manager.h	2087	0644	edit dl rm
my_stacktrace.h	3215	0644	edit dl rm
my_stack_alloc.h	6493	0644	edit dl rm
my_time.h	10414	0644	edit dl rm
my_tree.h	3991	0644	edit dl rm
my_uctype.h	69528	0644	edit dl rm
my_user.h	1126	0644	edit dl rm
my_virtual_mem.h	1127	0644	edit dl rm
opt_histogram_json.h	4638	0644	edit dl rm
opt_range.h	65903	0644	edit dl rm
opt_subselect.h	14545	0644	edit dl rm
opt_trace.h	8494	0644	edit dl rm
opt_trace_context.h	3291	0644	edit dl rm
parse_file.h	4387	0644	edit dl rm
partition_element.h	5428	0644	edit dl rm
partition_info.h	19864	0644	edit dl rm
password.h	1170	0644	edit dl rm
pfs_file_provider.h	3153	0644	edit dl rm
pfs_idle_provider.h	1385	0644	edit dl rm
pfs_memory_provider.h	1626	0644	edit dl rm
pfs_metadata_provider.h	1898	0644	edit dl rm
pfs_socket_provider.h	2258	0644	edit dl rm
pfs_stage_provider.h	1556	0644	edit dl rm
pfs_statement_provider.h	4347	0644	edit dl rm
pfs_table_provider.h	2625	0644	edit dl rm
pfs_thread_provider.h	5560	0644	edit dl rm
pfs_transaction_provider.h	2846	0644	edit dl rm
privilege.h	28889	0644	edit dl rm
probes_mysql.h	973	0644	edit dl rm
probes_mysql_nodtrace.h	6087	0644	edit dl rm
procedure.h	6819	0644	edit dl rm
protocol.h	12537	0644	edit dl rm
proxy_protocol.h	548	0644	edit dl rm
queues.h	3477	0644	edit dl rm
records.h	3147	0644	edit dl rm
replication.h	16130	0644	edit dl rm
repl_failsafe.h	1585	0644	edit dl rm
rijndael.h	1711	0644	edit dl rm
rowid_filter.h	15474	0644	edit dl rm
rpl_constants.h	3357	0644	edit dl rm
rpl_filter.h	4774	0644	edit dl rm
rpl_gtid.h	29939	0644	edit dl rm
rpl_injector.h	9621	0644	edit dl rm
rpl_mi.h	16638	0644	edit dl rm
rpl_parallel.h	18228	0644	edit dl rm
rpl_record.h	1585	0644	edit dl rm
rpl_record_old.h	1407	0644	edit dl rm
rpl_reporting.h	3713	0644	edit dl rm
rpl_rli.h	36070	0644	edit dl rm
rpl_tblmap.h	3177	0644	edit dl rm
rpl_utility.h	9630	0644	edit dl rm
scheduler.h	3199	0644	edit dl rm
scope.h	4393	0644	edit dl rm
select_handler.h	2228	0644	edit dl rm
semisync.h	2287	0644	edit dl rm
semisync_master.h	25766	0644	edit dl rm
semisync_master_ack_receiver.h	8709	0644	edit dl rm
semisync_slave.h	3736	0644	edit dl rm
service_versions.h	2285	0644	edit dl rm
session_tracker.h	14275	0644	edit dl rm
set_var.h	16551	0644	edit dl rm
slave.h	12275	0644	edit dl rm
socketpair.h	842	0644	edit dl rm
source_revision.h	67	0644	edit dl rm
sp.h	22588	0644	edit dl rm
span.h	3931	0644	edit dl rm
spatial.h	22698	0644	edit dl rm
sp_cache.h	2037	0644	edit dl rm
sp_head.h	64917	0644	edit dl rm
sp_pcontext.h	24893	0644	edit dl rm
sp_rcontext.h	14441	0644	edit dl rm
sql_acl.h	14167	0644	edit dl rm
sql_admin.h	2915	0644	edit dl rm
sql_alloc.h	1732	0644	edit dl rm
sql_alter.h	15395	0644	edit dl rm
sql_analyse.h	11125	0644	edit dl rm
sql_analyze_stmt.h	12683	0644	edit dl rm
sql_array.h	6858	0644	edit dl rm
sql_audit.h	14162	0644	edit dl rm
sql_base.h	26041	0644	edit dl rm
sql_basic_types.h	9523	0644	edit dl rm
sql_binlog.h	895	0644	edit dl rm
sql_bitmap.h	7842	0644	edit dl rm
sql_bootstrap.h	1812	0644	edit dl rm
sql_cache.h	21676	0644	edit dl rm
sql_callback.h	1542	0644	edit dl rm
sql_class.h	271120	0644	edit dl rm
sql_cmd.h	5962	0644	edit dl rm
sql_command.h	4800	0644	edit dl rm
sql_connect.h	4087	0644	edit dl rm
sql_const.h	11415	0644	edit dl rm
sql_crypt.h	1437	0644	edit dl rm
sql_cte.h	16494	0644	edit dl rm
sql_cursor.h	4239	0644	edit dl rm
sql_db.h	2438	0644	edit dl rm
sql_debug.h	5646	0644	edit dl rm
sql_delete.h	1343	0644	edit dl rm
sql_derived.h	1289	0644	edit dl rm
sql_digest.h	3819	0644	edit dl rm
sql_digest_stream.h	1567	0644	edit dl rm
sql_do.h	954	0644	edit dl rm
sql_error.h	39843	0644	edit dl rm
sql_explain.h	30319	0644	edit dl rm
sql_expression_cache.h	4359	0644	edit dl rm
sql_get_diagnostics.h	7883	0644	edit dl rm
sql_handler.h	2910	0644	edit dl rm
sql_help.h	995	0644	edit dl rm
sql_hset.h	3401	0644	edit dl rm
sql_insert.h	5173	0644	edit dl rm
sql_i_s.h	8487	0644	edit dl rm
sql_join_cache.h	48659	0644	edit dl rm
sql_lex.h	174693	0644	edit dl rm
sql_lifo_buffer.h	9676	0644	edit dl rm
sql_limit.h	3187	0644	edit dl rm
sql_list.h	22391	0644	edit dl rm
sql_load.h	1276	0644	edit dl rm
sql_locale.h	2701	0644	edit dl rm
sql_manager.h	960	0644	edit dl rm
sql_mode.h	6735	0644	edit dl rm
sql_parse.h	8970	0644	edit dl rm
sql_partition.h	12674	0644	edit dl rm
sql_partition_admin.h	5940	0644	edit dl rm
sql_plist.h	7711	0644	edit dl rm
sql_plugin.h	7577	0644	edit dl rm
sql_plugin_compat.h	2237	0644	edit dl rm
sql_prepare.h	11409	0644	edit dl rm
sql_priv.h	18474	0644	edit dl rm
sql_profile.h	7816	0644	edit dl rm
sql_reload.h	1036	0644	edit dl rm
sql_rename.h	982	0644	edit dl rm
sql_repl.h	3045	0644	edit dl rm
sql_schema.h	3303	0644	edit dl rm
sql_select.h	89743	0644	edit dl rm
sql_sequence.h	5177	0644	edit dl rm
sql_servers.h	1777	0644	edit dl rm
sql_show.h	9830	0644	edit dl rm
sql_signal.h	3362	0644	edit dl rm
sql_sort.h	21964	0644	edit dl rm
sql_statistics.h	16494	0644	edit dl rm
sql_string.h	39009	0644	edit dl rm
sql_table.h	9752	0644	edit dl rm
sql_test.h	1589	0644	edit dl rm
sql_time.h	8374	0644	edit dl rm
sql_trigger.h	12332	0644	edit dl rm
sql_truncate.h	2079	0644	edit dl rm
sql_tvc.h	2418	0644	edit dl rm
sql_type.h	296072	0644	edit dl rm
sql_type_fixedbin.h	65578	0644	edit dl rm
sql_type_fixedbin_storage.h	5467	0644	edit dl rm
sql_type_geom.h	19039	0644	edit dl rm
sql_type_int.h	10001	0644	edit dl rm
sql_type_json.h	6155	0644	edit dl rm
sql_type_real.h	1257	0644	edit dl rm
sql_type_string.h	1629	0644	edit dl rm
sql_udf.h	4850	0644	edit dl rm
sql_union.h	1068	0644	edit dl rm
sql_update.h	1923	0644	edit dl rm
sql_view.h	2470	0644	edit dl rm
sql_window.h	6814	0644	edit dl rm
ssl_compat.h	3380	0644	edit dl rm
strfunc.h	2275	0644	edit dl rm
structs.h	29530	0644	edit dl rm
sys_vars_shared.h	2729	0644	edit dl rm
table.h	118414	0644	edit dl rm
table_cache.h	4232	0644	edit dl rm
threadpool.h	4810	0644	edit dl rm
threadpool_generic.h	3969	0644	edit dl rm
threadpool_winsockets.h	2290	0644	edit dl rm
thread_cache.h	5905	0644	edit dl rm
thr_alarm.h	2932	0644	edit dl rm
thr_lock.h	7350	0644	edit dl rm
thr_malloc.h	1202	0644	edit dl rm
thr_timer.h	1563	0644	edit dl rm
transaction.h	1466	0644	edit dl rm
tzfile.h	5014	0644	edit dl rm
tztime.h	3397	0644	edit dl rm
t_ctype.h	5639	0644	edit dl rm
uniques.h	4217	0644	edit dl rm
unireg.h	7722	0644	edit dl rm
vers_string.h	2543	0644	edit dl rm
violite.h	10086	0644	edit dl rm
waiting_threads.h	4532	0644	edit dl rm
welcome_copyright_notice.h	1218	0644	edit dl rm
winservice.h	6019	0644	edit dl rm
win_tzname_data.h	6506	0644	edit dl rm
wqueue.h	1565	0644	edit dl rm
wsrep.h	3308	0644	edit dl rm
wsrep_allowlist_service.h	1035	0644	edit dl rm
wsrep_applier.h	2703	0644	edit dl rm
wsrep_binlog.h	3551	0644	edit dl rm
wsrep_client_service.h	2560	0644	edit dl rm
wsrep_client_state.h	1566	0644	edit dl rm
wsrep_condition_variable.h	1484	0644	edit dl rm
wsrep_high_priority_service.h	4912	0644	edit dl rm
wsrep_mutex.h	1239	0644	edit dl rm
wsrep_mysqld.h	21524	0644	edit dl rm
wsrep_mysqld_c.h	1227	0644	edit dl rm
wsrep_on.h	1718	0644	edit dl rm
wsrep_priv.h	1634	0644	edit dl rm
wsrep_schema.h	5608	0644	edit dl rm
wsrep_server_service.h	3631	0644	edit dl rm
wsrep_server_state.h	2529	0644	edit dl rm
wsrep_sst.h	3951	0644	edit dl rm
wsrep_status.h	1816	0644	edit dl rm
wsrep_storage_service.h	1809	0644	edit dl rm
wsrep_thd.h	11487	0644	edit dl rm
wsrep_trans_observer.h	18174	0644	edit dl rm
wsrep_types.h	1110	0644	edit dl rm
wsrep_utils.h	9807	0644	edit dl rm
wsrep_var.h	4491	0644	edit dl rm
wsrep_xid.h	1549	0644	edit dl rm
xa.h	1845	0644	edit dl rm

Edit: /usr/include/mysql/server/private/sp_head.h (64917B)

/* -*- C++ -*- */
/*
   Copyright (c) 2002, 2011, Oracle and/or its affiliates.
   Copyright (c) 2020, 2022, MariaDB

This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */

#ifndef _SP_HEAD_H_
#define _SP_HEAD_H_

#ifdef USE_PRAGMA_INTERFACE
#pragma interface			/* gcc class implementation */
#endif

/*
  It is necessary to include set_var.h instead of item.h because there
  are dependencies on include order for set_var.h and item.h. This
  will be resolved later.
*/
#include "sql_class.h"                          // THD, set_var.h: THD
#include "set_var.h"                            // Item
#include "sp_pcontext.h"                        // sp_pcontext
#include <stddef.h>
#include "sp.h"

/**
  @defgroup Stored_Routines Stored Routines
  @ingroup Runtime_Environment
  @{
*/

uint
sp_get_flags_for_command(LEX *lex);

class sp_instr;
class sp_instr_opt_meta;
class sp_instr_jump_if_not;

/**
  Number of PSI_statement_info instruments
  for internal stored programs statements.
*/
#ifdef HAVE_PSI_INTERFACE
void init_sp_psi_keys(void);
#endif

/*************************************************************************/

/**
  Stored_program_creation_ctx -- base class for creation context of stored
  programs (stored routines, triggers, events).
*/

class Stored_program_creation_ctx :public Default_object_creation_ctx
{
public:
  CHARSET_INFO *get_db_cl()
  {
    return m_db_cl;
  }

public:
  virtual Stored_program_creation_ctx *clone(MEM_ROOT *mem_root) = 0;

protected:
  Stored_program_creation_ctx(THD *thd)
    : Default_object_creation_ctx(thd),
      m_db_cl(thd->variables.collation_database)
  { }

Stored_program_creation_ctx(CHARSET_INFO *client_cs,
                              CHARSET_INFO *connection_cl,
                              CHARSET_INFO *db_cl)
    : Default_object_creation_ctx(client_cs, connection_cl),
      m_db_cl(db_cl)
  { }

protected:
  void change_env(THD *thd) const override
  {
    thd->variables.collation_database= m_db_cl;

Default_object_creation_ctx::change_env(thd);
  }

protected:
  /**
    db_cl stores the value of the database collation. Both character set
    and collation attributes are used.

Database collation is included into the context because it defines the
    default collation for stored-program variables.
  */
  CHARSET_INFO *m_db_cl;
};

/*************************************************************************/

class sp_name : public Sql_alloc,
                public Database_qualified_name
{
public:
  bool       m_explicit_name;                   /**< Prepend the db name? */

sp_name(const LEX_CSTRING *db, const LEX_CSTRING *name,
          bool use_explicit_name)
    : Database_qualified_name(db, name), m_explicit_name(use_explicit_name)
  {
    if (lower_case_table_names && m_db.length)
      m_db.length= my_casedn_str(files_charset_info, (char*) m_db.str);
  }

/** Create temporary sp_name object from MDL key. Store in qname_buff */
  sp_name(const MDL_key *key, char *qname_buff);

~sp_name() = default;
};

bool
check_routine_name(const LEX_CSTRING *ident);

class sp_head :private Query_arena,
               public Database_qualified_name,
               public Sql_alloc
{
  sp_head(const sp_head &)= delete;
  void operator=(sp_head &)= delete;

protected:
  MEM_ROOT main_mem_root;
#ifdef PROTECT_STATEMENT_MEMROOT
  /*
    The following data member is wholly for debugging purpose.
    It can be used for possible crash analysis to determine how many times
    the stored routine was executed before the mem_root marked read_only
    was requested for a memory chunk. Additionally, a value of this data
    member is output to the log with DBUG_PRINT.
  */
  ulong executed_counter;
#endif
public:
  /** Possible values of m_flags */
  enum {
    HAS_RETURN= 1,              // For FUNCTIONs only: is set if has RETURN
    MULTI_RESULTS= 8,           // Is set if a procedure with SELECT(s)
    CONTAINS_DYNAMIC_SQL= 16,   // Is set if a procedure with PREPARE/EXECUTE
    IS_INVOKED= 32,             // Is set if this sp_head is being used
    HAS_SET_AUTOCOMMIT_STMT= 64,// Is set if a procedure with 'set autocommit'
    /* Is set if a procedure with COMMIT (implicit or explicit) | ROLLBACK */
    HAS_COMMIT_OR_ROLLBACK= 128,
    LOG_SLOW_STATEMENTS= 256,   // Used by events
    LOG_GENERAL_LOG= 512,        // Used by events
    HAS_SQLCOM_RESET= 1024,
    HAS_SQLCOM_FLUSH= 2048,

/**
      Marks routines that directly (i.e. not by calling other routines)
      change tables. Note that this flag is set automatically based on
      type of statements used in the stored routine and is different
      from routine characteristic provided by user in a form of CONTAINS
      SQL, READS SQL DATA, MODIFIES SQL DATA clauses. The latter are
      accepted by parser but pretty much ignored after that.
      We don't rely on them:
      a) for compatibility reasons.
      b) because in CONTAINS SQL case they don't provide enough
      information anyway.
     */
    MODIFIES_DATA= 4096,
    /*
      Marks routines that have column type references: DECLARE a t1.a%TYPE;
    */
    HAS_COLUMN_TYPE_REFS= 8192,
    /* Set if has FETCH GROUP NEXT ROW instr. Used to ensure that only
       functions with AGGREGATE keyword use the instr. */
    HAS_AGGREGATE_INSTR= 16384
  };

sp_package *m_parent;
  const Sp_handler *m_handler;
  uint m_flags;                 // Boolean attributes of a stored routine

/**
    Instrumentation interface for SP.
  */
  PSI_sp_share *m_sp_share;

Column_definition m_return_field_def; /**< This is used for FUNCTIONs only. */

const char *m_tmp_query;	///< Temporary pointer to sub query string
private:
  /*
    Private to guarantee that m_chistics.comment is properly set to:
    - a string which is alloced on this->mem_root
    - or (NULL,0)
    set_chistics() makes sure this.
  */
  Sp_chistics m_chistics;
  void set_chistics(const st_sp_chistics &chistics);
  inline void set_chistics_agg_type(enum enum_sp_aggregate_type type)
  {
    m_chistics.agg_type= type;
  }
public:
  sql_mode_t m_sql_mode;		///< For SHOW CREATE and execution
  bool       m_explicit_name;                   /**< Prepend the db name? */
  LEX_CSTRING m_qname;		///< db.name
  LEX_CSTRING m_params;
  LEX_CSTRING m_body;
  LEX_CSTRING m_body_utf8;
  LEX_CSTRING m_defstr;
  AUTHID      m_definer;

const st_sp_chistics &chistics() const { return m_chistics; }
  const LEX_CSTRING &comment() const { return m_chistics.comment; }
  void set_suid(enum_sp_suid_behaviour suid) { m_chistics.suid= suid; }
  enum_sp_suid_behaviour suid() const { return m_chistics.suid; }
  bool detistic() const { return m_chistics.detistic; }
  enum_sp_data_access daccess() const { return m_chistics.daccess; }
  enum_sp_aggregate_type agg_type() const { return m_chistics.agg_type; }
  /**
    Is this routine being executed?
  */
  virtual bool is_invoked() const { return m_flags & IS_INVOKED; }

/**
    Get the value of the SP cache version, as remembered
    when the routine was inserted into the cache.
  */
  ulong sp_cache_version() const;

/** Set the value of the SP cache version.  */
  void set_sp_cache_version(ulong version_arg) const
  {
    m_sp_cache_version= version_arg;
  }

sp_rcontext *rcontext_create(THD *thd, Field *retval, List<Item> *args);
  sp_rcontext *rcontext_create(THD *thd, Field *retval,
                               Item **args, uint arg_count);
  sp_rcontext *rcontext_create(THD *thd, Field *retval,
                               Row_definition_list *list,
                               bool switch_security_ctx);
  bool eq_routine_spec(const sp_head *) const;
private:
  /**
    Version of the stored routine cache at the moment when the
    routine was added to it. Is used only for functions and
    procedures, not used for triggers or events.  When sp_head is
    created, its version is 0. When it's added to the cache, the
    version is assigned the global value 'Cversion'.
    If later on Cversion is incremented, we know that the routine
    is obsolete and should not be used --
    sp_cache_flush_obsolete() will purge it.
  */
  mutable ulong m_sp_cache_version;
  Stored_program_creation_ctx *m_creation_ctx;
  /**
    Boolean combination of (1<<flag), where flag is a member of
    LEX::enum_binlog_stmt_unsafe.
  */
  uint32 unsafe_flags;

public:
  inline Stored_program_creation_ctx *get_creation_ctx()
  {
    return m_creation_ctx;
  }

inline void set_creation_ctx(Stored_program_creation_ctx *creation_ctx)
  {
    m_creation_ctx= creation_ctx->clone(mem_root);
  }

longlong m_created;
  longlong m_modified;
  /** Recursion level of the current SP instance. The levels are numbered from 0 */
  ulong m_recursion_level;
  /**
    A list of diferent recursion level instances for the same procedure.
    For every recursion level we have a sp_head instance. This instances
    connected in the list. The list ordered by increasing recursion level
    (m_recursion_level).
  */
  sp_head *m_next_cached_sp;
  /**
    Pointer to the first element of the above list
  */
  sp_head *m_first_instance;
  /**
    Pointer to the first free (non-INVOKED) routine in the list of
    cached instances for this SP. This pointer is set only for the first
    SP in the list of instences (see above m_first_cached_sp pointer).
    The pointer equal to 0 if we have no free instances.
    For non-first instance value of this pointer meanless (point to itself);
  */
  sp_head *m_first_free_instance;
  /**
    Pointer to the last element in the list of instances of the SP.
    For non-first instance value of this pointer meanless (point to itself);
  */
  sp_head *m_last_cached_sp;
  /**
    Set containing names of stored routines used by this routine.
    Note that unlike elements of similar set for statement elements of this
    set are not linked in one list. Because of this we are able save memory
    by using for this set same objects that are used in 'sroutines' sets
    for statements of which this stored routine consists.
  */
  HASH m_sroutines;
  // Pointers set during parsing
  const char *m_param_begin;
  const char *m_param_end;

private:
  /*
    A pointer to the body start inside the cpp buffer.
    Used only during parsing. Should be removed eventually.
    The affected functions/methods should be fixed to get the cpp body start
    as a parameter, rather than through this member.
  */
  const char *m_cpp_body_begin;

public:
  /*
    Security context for stored routine which should be run under
    definer privileges.
  */
  Security_context m_security_ctx;

/**
    List of all items (Item_trigger_field objects) representing fields in
    old/new version of row in trigger. We use this list for checking whenever
    all such fields are valid at trigger creation time and for binding these
    fields to TABLE object at table open (although for latter pointer to table
    being opened is probably enough).
  */
  SQL_I_List<Item_trigger_field> m_trg_table_fields;

protected:
  sp_head(MEM_ROOT *mem_root, sp_package *parent, const Sp_handler *handler,
          enum_sp_aggregate_type agg_type);
  virtual ~sp_head();
public:
  static void destroy(sp_head *sp);
  static sp_head *create(sp_package *parent, const Sp_handler *handler,
                         enum_sp_aggregate_type agg_type);

/// Initialize after we have reset mem_root
  void
  init(LEX *lex);

/** Copy sp name from parser. */
  void
  init_sp_name(const sp_name *spname);

/** Set the body-definition start position. */
  void
  set_body_start(THD *thd, const char *cpp_body_start);

/** Set the statement-definition (body-definition) end position. */
  void
  set_stmt_end(THD *thd, const char *cpp_body_end);

bool
  execute_trigger(THD *thd,
                  const LEX_CSTRING *db_name,
                  const LEX_CSTRING *table_name,
                  GRANT_INFO *grant_info);

bool
  execute_function(THD *thd, Item **args, uint argcount, Field *return_fld,
                   sp_rcontext **nctx, Query_arena *call_arena);

bool
  execute_procedure(THD *thd, List<Item> *args);

static void
  show_create_routine_get_fields(THD *thd, const Sp_handler *sph,
                                 List<Item> *fields);

bool
  show_create_routine(THD *thd, const Sp_handler *sph);

MEM_ROOT *get_main_mem_root() { return &main_mem_root; }

int
  add_instr(sp_instr *instr);

bool
  add_instr_jump(THD *thd, sp_pcontext *spcont);

bool
  add_instr_jump(THD *thd, sp_pcontext *spcont, uint dest);

bool
  add_instr_jump_forward_with_backpatch(THD *thd, sp_pcontext *spcont,
                                        sp_label *lab);
  bool
  add_instr_jump_forward_with_backpatch(THD *thd, sp_pcontext *spcont)
  {
    return add_instr_jump_forward_with_backpatch(thd, spcont,
                                                 spcont->last_label());
  }

bool
  add_instr_freturn(THD *thd, sp_pcontext *spcont, Item *item, LEX *lex);

bool
  add_instr_preturn(THD *thd, sp_pcontext *spcont);

Item *adjust_assignment_source(THD *thd, Item *val, Item *val2);
  /**
    @param thd                     - the current thd
    @param spcont                  - the current parse context
    @param spv                     - the SP variable
    @param val                     - the value to be assigned to the variable
    @param lex                     - the LEX that was used to create "val"
    @param responsible_to_free_lex - if the generated sp_instr_set should
                                     free "lex".
    @retval true                   - on error
    @retval false                  - on success
  */
  bool set_local_variable(THD *thd, sp_pcontext *spcont,
                          const Sp_rcontext_handler *rh,
                          sp_variable *spv, Item *val, LEX *lex,
                          bool responsible_to_free_lex);
  bool set_local_variable_row_field(THD *thd, sp_pcontext *spcont,
                                    const Sp_rcontext_handler *rh,
                                    sp_variable *spv, uint field_idx,
                                    Item *val, LEX *lex);
  bool set_local_variable_row_field_by_name(THD *thd, sp_pcontext *spcont,
                                            const Sp_rcontext_handler *rh,
                                            sp_variable *spv,
                                            const LEX_CSTRING *field_name,
                                            Item *val, LEX *lex);
  bool check_package_routine_end_name(const LEX_CSTRING &end_name) const;
  bool check_standalone_routine_end_name(const sp_name *end_name) const;
  bool check_group_aggregate_instructions_function() const;
  bool check_group_aggregate_instructions_forbid() const;
  bool check_group_aggregate_instructions_require() const;
private:
  /**
    Generate a code to set a single cursor parameter variable.
    @param thd          - current thd, for mem_root allocations.
    @param param_spcont - the context of the parameter block
    @param idx          - the index of the parameter
    @param prm          - the actual parameter (contains information about
                          the assignment source expression Item,
                          its free list, and its LEX)
  */
  bool add_set_cursor_param_variable(THD *thd,
                                     sp_pcontext *param_spcont, uint idx,
                                     sp_assignment_lex *prm)
  {
    DBUG_ASSERT(idx < param_spcont->context_var_count());
    sp_variable *spvar= param_spcont->get_context_variable(idx);
    /*
      add_instr() gets free_list from m_thd->free_list.
      Initialize it before the set_local_variable() call.
    */
    DBUG_ASSERT(m_thd->free_list == NULL);
    m_thd->free_list= prm->get_free_list();
    if (set_local_variable(thd, param_spcont,
                           &sp_rcontext_handler_local,
                           spvar, prm->get_item(), prm, true))
      return true;
    /*
      Safety:
      The item and its free_list are now fully owned by the sp_instr_set
      instance, created by set_local_variable(). The sp_instr_set instance
      is now responsible for freeing the item and the free_list.
      Reset the "item" and the "free_list" members of "prm",
      to avoid double pointers to the same objects from "prm" and
      from the sp_instr_set instance.
    */
    prm->set_item_and_free_list(NULL, NULL);
    return false;
  }

/**
    Generate a code to set all cursor parameter variables.
    This method is called only when parameters exists,
    and the number of formal parameters matches the number of actual
    parameters. See also comments to add_open_cursor().
  */
  bool add_set_cursor_param_variables(THD *thd, sp_pcontext *param_spcont,
                                      List<sp_assignment_lex> *parameters)
  {
    DBUG_ASSERT(param_spcont->context_var_count() == parameters->elements);
    sp_assignment_lex *prm;
    List_iterator<sp_assignment_lex> li(*parameters);
    for (uint idx= 0; (prm= li++); idx++)
    {
      if (add_set_cursor_param_variable(thd, param_spcont, idx, prm))
        return true;
    }
    return false;
  }

/**
    Generate a code to set all cursor parameter variables for a FOR LOOP, e.g.:
      FOR index IN cursor(1,2,3)
    @param
  */
  bool add_set_for_loop_cursor_param_variables(THD *thd,
                                               sp_pcontext *param_spcont,
                                               sp_assignment_lex *param_lex,
                                               Item_args *parameters);

bool bind_input_param(THD *thd,
                        Item *arg_item,
                        uint arg_no,
                        sp_rcontext *nctx,
                        bool is_function);

bool bind_output_param(THD *thd,
                         Item *arg_item,
                         uint arg_no,
                         sp_rcontext *octx,
                         sp_rcontext *nctx);

public:
  /**
    Generate a code for an "OPEN cursor" statement.
    @param thd          - current thd, for mem_root allocations
    @param spcont       - the context of the cursor
    @param offset       - the offset of the cursor
    @param param_spcont - the context of the cursor parameter block
    @param parameters   - the list of the OPEN actual parameters

The caller must make sure that the number of local variables
    in "param_spcont" (formal parameters) matches the number of list elements
    in "parameters" (actual parameters).
    NULL in either of them means 0 parameters.
  */
  bool add_open_cursor(THD *thd, sp_pcontext *spcont,
                       uint offset,
                       sp_pcontext *param_spcont,
                       List<sp_assignment_lex> *parameters);

/**
    Generate an initiation code for a CURSOR FOR LOOP, e.g.:
      FOR index IN cursor         -- cursor without parameters
      FOR index IN cursor(1,2,3)  -- cursor with parameters

The code generated by this method does the following during SP run-time:
    - Sets all cursor parameter vartiables from "parameters"
    - Initializes the index ROW-type variable from the cursor
      (the structure is copied from the cursor to the index variable)
    - The cursor gets opened
    - The first records is fetched from the cursor to the variable "index".

@param thd        - the current thread (for mem_root and error reporting)
    @param spcont     - the current parse context
    @param index      - the loop "index" ROW-type variable
    @param pcursor    - the cursor
    @param coffset    - the cursor offset
    @param param_lex  - the LEX that owns Items in "parameters"
    @param parameters - the cursor parameters Item array
    @retval true      - on error (EOM)
    @retval false     - on success
  */
  bool add_for_loop_open_cursor(THD *thd, sp_pcontext *spcont,
                                sp_variable *index,
                                const sp_pcursor *pcursor, uint coffset,
                                sp_assignment_lex *param_lex,
                                Item_args *parameters);
  /**
    Returns true if any substatement in the routine directly
    (not through another routine) modifies data/changes table.

@sa Comment for MODIFIES_DATA flag.
  */
  bool modifies_data() const
  { return m_flags & MODIFIES_DATA; }

inline uint instructions()
  { return (uint)m_instr.elements; }

inline sp_instr *
  last_instruction()
  {
    sp_instr *i;

get_dynamic(&m_instr, (uchar*)&i, m_instr.elements-1);
    return i;
  }

bool replace_instr_to_nop(THD *thd, uint ip);

/*
    Resets lex in 'thd' and keeps a copy of the old one.

@todo Conflicting comment in sp_head.cc
  */
  bool
  reset_lex(THD *thd);

bool
  reset_lex(THD *thd, sp_lex_local *sublex);

/**
    Merge two LEX instances.
    @param oldlex - the upper level LEX we're going to restore to.
    @param sublex - the local lex that have just parsed some substatement.
    @returns      - false on success, true on error (e.g. failed to
                    merge the routine list or the table list).
    This method is shared by:
    - restore_lex(), when the old LEX is popped by sp_head::m_lex.pop()
    - THD::restore_from_local_lex_to_old_lex(), when the old LEX
      is stored in the caller's local variable.
  */
  bool
  merge_lex(THD *thd, LEX *oldlex, LEX *sublex);

/**
    Restores lex in 'thd' from our copy, but keeps some status from the
    one in 'thd', like ptr, tables, fields, etc.

@todo Conflicting comment in sp_head.cc
  */
  bool
  restore_lex(THD *thd)
  {
    DBUG_ENTER("sp_head::restore_lex");
    /*
      There is no a need to free the current thd->lex here.
      - In the majority of the cases restore_lex() is called
        on success and thd->lex does not need to be deleted.
      - In cases when restore_lex() is called on error,
        e.g. from sp_create_assignment_instr(), thd->lex is
        already linked to some sp_instr_xxx (using sp_lex_keeper).

Note, we don't get to here in case of a syntax error
      when the current thd->lex is not yet completely
      initialized and linked. It gets automatically deleted
      by the Bison %destructor in sql_yacc.yy.
    */
    LEX *oldlex= (LEX *) m_lex.pop();
    if (!oldlex)
      DBUG_RETURN(false); // Nothing to restore
    // This restores thd->lex and thd->stmt_lex
    DBUG_RETURN(thd->restore_from_local_lex_to_old_lex(oldlex));
  }

/**
    Iterate through the LEX stack from the top (the newest) to the bottom
    (the oldest) and find the one that contains a non-zero spname.
    @returns - the address of spname, or NULL of no spname found.
  */
  const sp_name *find_spname_recursive()
  {
    uint count= m_lex.elements;
    for (uint i= 0; i < count; i++)
    {
      const LEX *tmp= m_lex.elem(count - i - 1);
      if (tmp->spname)
        return tmp->spname;
    }
    return NULL;
  }

/// Put the instruction on the backpatch list, associated with the label.
  int
  push_backpatch(THD *thd, sp_instr *, sp_label *);
  int
  push_backpatch_goto(THD *thd, sp_pcontext *ctx, sp_label *lab);

/// Update all instruction with this label in the backpatch list to
  /// the current position.
  void
  backpatch(sp_label *);
  void
  backpatch_goto(THD *thd, sp_label *, sp_label *);

/// Check for unresolved goto label
  bool
  check_unresolved_goto();

/// Start a new cont. backpatch level. If 'i' is NULL, the level is just incr.
  int
  new_cont_backpatch(sp_instr_opt_meta *i);

/// Add an instruction to the current level
  int
  add_cont_backpatch(sp_instr_opt_meta *i);

/// Backpatch (and pop) the current level to the current position.
  void
  do_cont_backpatch();

/// Add cpush instructions for all cursors declared in the current frame
  bool sp_add_instr_cpush_for_cursors(THD *thd, sp_pcontext *pcontext);

const LEX_CSTRING *name() const
  { return &m_name; }

char *create_string(THD *thd, ulong *lenp);

Field *create_result_field(uint field_max_length, const LEX_CSTRING *field_name,
                             TABLE *table) const;

/**
    Check and prepare an instance of Column_definition for field creation
    (fill all necessary attributes), for variables, parameters and
    function return values.

@param[in]  thd          Thread handle
    @param[in]  lex          Yacc parsing context
    @param[out] field_def    An instance of create_field to be filled

@retval false on success
    @retval true  on error
  */
  bool fill_field_definition(THD *thd, Column_definition *field_def)
  {
    const Type_handler *h= field_def->type_handler();
    return h->Column_definition_fix_attributes(field_def) ||
           field_def->sp_prepare_create_field(thd, mem_root);
  }
  bool row_fill_field_definitions(THD *thd, Row_definition_list *row)
  {
    /*
      Prepare all row fields. This will (among other things)
      - convert VARCHAR lengths from character length to octet length
      - calculate interval lengths for SET and ENUM
    */
    List_iterator<Spvar_definition> it(*row);
    for (Spvar_definition *def= it++; def; def= it++)
    {
      if (fill_spvar_definition(thd, def))
        return true;
    }
    return false;
  }
  /**
    Check and prepare a Column_definition for a variable or a parameter.
  */
  bool fill_spvar_definition(THD *thd, Column_definition *def)
  {
    if (fill_field_definition(thd, def))
      return true;
    def->pack_flag|= FIELDFLAG_MAYBE_NULL;
    return false;
  }
  bool fill_spvar_definition(THD *thd, Column_definition *def,
                             LEX_CSTRING *name)
  {
    def->field_name= *name;
    return fill_spvar_definition(thd, def);
  }

private:
  /**
    Set a column type reference for a parameter definition
  */
  void fill_spvar_using_type_reference(sp_variable *spvar,
                                       Qualified_column_ident *ref)
  {
    spvar->field_def.set_column_type_ref(ref);
    spvar->field_def.field_name= spvar->name;
    m_flags|= sp_head::HAS_COLUMN_TYPE_REFS;
  }

void fill_spvar_using_table_rowtype_reference(THD *thd,
                                                sp_variable *spvar,
                                                Table_ident *ref)
  {
    spvar->field_def.set_table_rowtype_ref(ref);
    spvar->field_def.field_name= spvar->name;
    fill_spvar_definition(thd, &spvar->field_def);
    m_flags|= sp_head::HAS_COLUMN_TYPE_REFS;
  }

public:
  bool spvar_fill_row(THD *thd, sp_variable *spvar, Row_definition_list *def);
  bool spvar_fill_type_reference(THD *thd, sp_variable *spvar,
                                 const LEX_CSTRING &table,
                                 const LEX_CSTRING &column);
  bool spvar_fill_type_reference(THD *thd, sp_variable *spvar,
                                 const LEX_CSTRING &db,
                                 const LEX_CSTRING &table,
                                 const LEX_CSTRING &column);
  bool spvar_fill_table_rowtype_reference(THD *thd, sp_variable *spvar,
                                          const LEX_CSTRING &table);
  bool spvar_fill_table_rowtype_reference(THD *thd, sp_variable *spvar,
                                          const LEX_CSTRING &db,
                                          const LEX_CSTRING &table);

void set_c_chistics(const st_sp_chistics &chistics);
  void set_info(longlong created, longlong modified,
		const st_sp_chistics &chistics, sql_mode_t sql_mode);

void set_definer(const char *definer, size_t definerlen)
  {
    AUTHID tmp;
    tmp.parse(definer, definerlen);
    m_definer.copy(mem_root, &tmp.user, &tmp.host);
  }
  void set_definer(const LEX_CSTRING *user_name, const LEX_CSTRING *host_name)
  {
    m_definer.copy(mem_root, user_name, host_name);
  }

void reset_thd_mem_root(THD *thd);

void restore_thd_mem_root(THD *thd);

/**
    Optimize the code.
  */
  void optimize();

/**
    Helper used during flow analysis during code optimization.
    See the implementation of <code>opt_mark()</code>.
    @param ip the instruction to add to the leads list
    @param leads the list of remaining paths to explore in the graph that
    represents the code, during flow analysis.
  */
  void add_mark_lead(uint ip, List<sp_instr> *leads);

inline sp_instr *
  get_instr(uint i)
  {
    sp_instr *ip;

if (i < m_instr.elements)
      get_dynamic(&m_instr, (uchar*)&ip, i);
    else
      ip= NULL;
    return ip;
  }

#ifdef PROTECT_STATEMENT_MEMROOT
  int has_all_instrs_executed();
  void reset_instrs_executed_counter();
#endif

/* Add tables used by routine to the table list. */
  bool add_used_tables_to_table_list(THD *thd,
                                     TABLE_LIST ***query_tables_last_ptr,
                                     TABLE_LIST *belong_to_view);

/**
    Check if this stored routine contains statements disallowed
    in a stored function or trigger, and set an appropriate error message
    if this is the case.
  */
  bool is_not_allowed_in_function(const char *where)
  {
    if (m_flags & CONTAINS_DYNAMIC_SQL)
      my_error(ER_STMT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0), "Dynamic SQL");
    else if (m_flags & MULTI_RESULTS)
      my_error(ER_SP_NO_RETSET, MYF(0), where);
    else if (m_flags & HAS_SET_AUTOCOMMIT_STMT)
      my_error(ER_SP_CANT_SET_AUTOCOMMIT, MYF(0));
    else if (m_flags & HAS_COMMIT_OR_ROLLBACK)
      my_error(ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0));
    else if (m_flags & HAS_SQLCOM_RESET)
      my_error(ER_STMT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0), "RESET");
    else if (m_flags & HAS_SQLCOM_FLUSH)
      my_error(ER_STMT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0), "FLUSH");

return MY_TEST(m_flags &
                  (CONTAINS_DYNAMIC_SQL | MULTI_RESULTS |
                   HAS_SET_AUTOCOMMIT_STMT | HAS_COMMIT_OR_ROLLBACK |
                   HAS_SQLCOM_RESET | HAS_SQLCOM_FLUSH));
  }

#ifndef DBUG_OFF
  int show_routine_code(THD *thd);
#endif

/*
    This method is intended for attributes of a routine which need
    to propagate upwards to the Query_tables_list of the caller (when
    a property of a sp_head needs to "taint" the calling statement).
  */
  void propagate_attributes(Query_tables_list *prelocking_ctx)
  {
    DBUG_ENTER("sp_head::propagate_attributes");
    /*
      If this routine needs row-based binary logging, the entire top statement
      too (we cannot switch from statement-based to row-based only for this
      routine, as in statement-based the top-statement may be binlogged and
      the substatements not).
    */
    DBUG_PRINT("info", ("lex->get_stmt_unsafe_flags(): 0x%x",
                        prelocking_ctx->get_stmt_unsafe_flags()));
    DBUG_PRINT("info", ("sp_head(%p=%s)->unsafe_flags: 0x%x",
                        this, name()->str, unsafe_flags));
    prelocking_ctx->set_stmt_unsafe_flags(unsafe_flags);
    DBUG_VOID_RETURN;
  }

sp_pcontext *get_parse_context() { return m_pcont; }

/*
    Check EXECUTE access:
    - in case of a standalone rotuine, for the routine itself
    - in case of a package routine, for the owner package body
  */
  bool check_execute_access(THD *thd) const;

virtual sp_package *get_package()
  {
    return NULL;
  }

virtual void init_psi_share();

protected:

MEM_ROOT *m_thd_root;		///< Temp. store for thd's mem_root
  THD *m_thd;			///< Set if we have reset mem_root

sp_pcontext *m_pcont;		///< Parse context
  List<LEX> m_lex;		///< Temp. store for the other lex
  DYNAMIC_ARRAY m_instr;	///< The "instructions"

enum backpatch_instr_type { GOTO, CPOP, HPOP };
  typedef struct
  {
    sp_label *lab;
    sp_instr *instr;
    backpatch_instr_type instr_type;
  } bp_t;
  List<bp_t> m_backpatch;	///< Instructions needing backpatching
  List<bp_t> m_backpatch_goto; // Instructions needing backpatching (for goto)

/**
    We need a special list for backpatching of instructions with a continue
    destination (in the case of a continue handler catching an error in
    the test), since it would otherwise interfere with the normal backpatch
    mechanism - e.g. jump_if_not instructions have two different destinations
    which are to be patched differently.
    Since these occur in a more restricted way (always the same "level" in
    the code), we don't need the label.
  */
  List<sp_instr_opt_meta> m_cont_backpatch;
  uint m_cont_level;            // The current cont. backpatch level

/**
    Multi-set representing optimized list of tables to be locked by this
    routine. Does not include tables which are used by invoked routines.

@note
    For prelocking-free SPs this multiset is constructed too.
    We do so because the same instance of sp_head may be called both
    in prelocked mode and in non-prelocked mode.
  */
  HASH m_sptabs;

bool
  execute(THD *thd, bool merge_da_on_success);

/**
    Perform a forward flow analysis in the generated code.
    Mark reachable instructions, for the optimizer.
  */
  void opt_mark();

/**
    Merge the list of tables used by query into the multi-set of tables used
    by routine.
  */
  bool merge_table_list(THD *thd, TABLE_LIST *table, LEX *lex_for_tmp_check);

/// Put the instruction on the a backpatch list, associated with the label.
  int
  push_backpatch(THD *thd, sp_instr *, sp_label *, List<bp_t> *list,
                 backpatch_instr_type itype);

}; // class sp_head : public Sql_alloc

class sp_package: public sp_head
{
  bool validate_public_routines(THD *thd, sp_package *spec);
  bool validate_private_routines(THD *thd);
public:
  class LexList: public List<LEX>
  {
  public:
    LexList() { elements= 0; }
    // Find a package routine by a non qualified name
    LEX *find(const LEX_CSTRING &name, enum_sp_type type);
    // Find a package routine by a package-qualified name, e.g. 'pkg.proc'
    LEX *find_qualified(const LEX_CSTRING &name, enum_sp_type type);
    // Check if a routine with the given qualified name already exists
    bool check_dup_qualified(const LEX_CSTRING &name, const Sp_handler *sph)
    {
      if (!find_qualified(name, sph->type()))
        return false;
      my_error(ER_SP_ALREADY_EXISTS, MYF(0), sph->type_str(), name.str);
      return true;
    }
    bool check_dup_qualified(const sp_head *sp)
    {
      return check_dup_qualified(sp->m_name, sp->m_handler);
    }
    void cleanup();
  };
  /*
    The LEX for a new package subroutine is initially assigned to
    m_current_routine. After scanning parameters, return type and chistics,
    the parser detects if we have a declaration or a definition, e.g.:
         PROCEDURE p1(a INT);
      vs
         PROCEDURE p1(a INT) AS BEGIN NULL; END;
    (i.e. either semicolon or the "AS" keyword)
    m_current_routine is then added either to m_routine_implementations,
    or m_routine_declarations, and then m_current_routine is set to NULL.
  */
  LEX *m_current_routine;
  LexList m_routine_implementations;
  LexList m_routine_declarations;

LEX *m_top_level_lex;
  sp_rcontext *m_rcontext;
  uint m_invoked_subroutine_count;
  bool m_is_instantiated;
  bool m_is_cloning_routine;

private:
  sp_package(MEM_ROOT *mem_root,
             LEX *top_level_lex,
             const sp_name *name,
             const Sp_handler *sph);
  ~sp_package();
public:
  static sp_package *create(LEX *top_level_lex, const sp_name *name,
                            const Sp_handler *sph);

bool add_routine_declaration(LEX *lex)
  {
    return m_routine_declarations.check_dup_qualified(lex->sphead) ||
           m_routine_declarations.push_back(lex, &main_mem_root);
  }
  bool add_routine_implementation(LEX *lex)
  {
    return m_routine_implementations.check_dup_qualified(lex->sphead) ||
           m_routine_implementations.push_back(lex, &main_mem_root);
  }
  sp_package *get_package() override { return this; }
  void init_psi_share() override;
  bool is_invoked() const override
  {
    /*
      Cannot flush a package out of the SP cache when:
      - its initialization block is running
      - one of its subroutine is running
    */
    return sp_head::is_invoked() || m_invoked_subroutine_count > 0;
  }
  sp_variable *find_package_variable(const LEX_CSTRING *name) const
  {
    /*
      sp_head::m_pcont is a special level for routine parameters.
      Variables declared inside CREATE PACKAGE BODY reside in m_children.at(0).
    */
    sp_pcontext *ctx= m_pcont->child_context(0);
    return ctx ? ctx->find_variable(name, true) : NULL;
  }
  bool validate_after_parser(THD *thd);
  bool instantiate_if_needed(THD *thd);
};

class sp_lex_cursor: public sp_lex_local, public Query_arena
{
public:
  sp_lex_cursor(THD *thd, const LEX *oldlex, MEM_ROOT *mem_root_arg)
   :sp_lex_local(thd, oldlex),
    Query_arena(mem_root_arg, STMT_INITIALIZED_FOR_SP)
  { }
  sp_lex_cursor(THD *thd, const LEX *oldlex)
   :sp_lex_local(thd, oldlex),
    Query_arena(thd->lex->sphead->get_main_mem_root(), STMT_INITIALIZED_FOR_SP)
  { }
  ~sp_lex_cursor() { free_items(); }
  bool cleanup_stmt(bool /*restore_set_statement_vars*/) override
  { return false; }
  Query_arena *query_arena() override { return this; }
  bool validate()
  {
    DBUG_ASSERT(sql_command == SQLCOM_SELECT);
    if (result)
    {
      my_error(ER_SP_BAD_CURSOR_SELECT, MYF(0));
      return true;
    }
    return false;
  }
  bool stmt_finalize(THD *thd)
  {
    if (validate())
      return true;
    sp_lex_in_use= true;
    free_list= thd->free_list;
    thd->free_list= NULL;
    return false;
  }
};

//
// "Instructions"...
//

class sp_instr :public Query_arena, public Sql_alloc
{
  sp_instr(const sp_instr &);	/**< Prevent use of these */
  void operator=(sp_instr &);

public:

uint marked;
  uint m_ip;			///< My index
  sp_pcontext *m_ctx;		///< My parse context
  uint m_lineno;

/// Should give each a name or type code for debugging purposes?
  sp_instr(uint ip, sp_pcontext *ctx)
    :Query_arena(0, STMT_INITIALIZED_FOR_SP), marked(0), m_ip(ip), m_ctx(ctx)
#ifdef PROTECT_STATEMENT_MEMROOT
  , m_has_been_run(NON_RUN)
#endif
  {}

virtual ~sp_instr()
  { free_items(); }

/**
    Execute this instruction

@param thd         Thread handle
    @param[out] nextp  index of the next instruction to execute. (For most
                       instructions this will be the instruction following this
                       one). Note that this parameter is undefined in case of
                       errors, use get_cont_dest() to find the continuation
                       instruction for CONTINUE error handlers.
   
    @retval 0      on success, 
    @retval other  if some error occurred
  */

virtual int execute(THD *thd, uint *nextp) = 0;

/**
    Execute <code>open_and_lock_tables()</code> for this statement.
    Open and lock the tables used by this statement, as a pre-requisite
    to execute the core logic of this instruction with
    <code>exec_core()</code>.
    @param thd the current thread
    @param tables the list of tables to open and lock
    @return zero on success, non zero on failure.
  */
  int exec_open_and_lock_tables(THD *thd, TABLE_LIST *tables);

/**
    Get the continuation destination of this instruction.
    @return the continuation destination
  */
  virtual uint get_cont_dest() const;

/*
    Execute core function of instruction after all preparations (e.g.
    setting of proper LEX, saving part of the thread context have been
    done).

Should be implemented for instructions using expressions or whole
    statements (thus having to have own LEX). Used in concert with
    sp_lex_keeper class and its descendants (there are none currently).
  */
  virtual int exec_core(THD *thd, uint *nextp);

virtual void print(String *str) = 0;

virtual void backpatch(uint dest, sp_pcontext *dst_ctx)
  {}

/**
    Mark this instruction as reachable during optimization and return the
    index to the next instruction. Jump instruction will add their
    destination to the leads list.
  */
  virtual uint opt_mark(sp_head *sp, List<sp_instr> *leads)
  {
    marked= 1;
    return m_ip+1;
  }

/**
    Short-cut jumps to jumps during optimization. This is used by the
    jump instructions' opt_mark() methods. 'start' is the starting point,
    used to prevent the mark sweep from looping for ever. Return the
    end destination.
  */
  virtual uint opt_shortcut_jump(sp_head *sp, sp_instr *start)
  {
    return m_ip;
  }

/**
    Inform the instruction that it has been moved during optimization.
    Most instructions will simply update its index, but jump instructions
    must also take care of their destination pointers. Forward jumps get
    pushed to the backpatch list 'ibp'.
  */
  virtual void opt_move(uint dst, List<sp_instr> *ibp)
  {
    m_ip= dst;
  }
  virtual PSI_statement_info* get_psi_info() = 0;

#ifdef PROTECT_STATEMENT_MEMROOT
  bool has_been_run() const
  {
    return m_has_been_run == RUN;
  }

void mark_as_qc_used()
  {
    m_has_been_run= QC;
  }

void mark_as_run()
  {
    if (m_has_been_run == QC)
      m_has_been_run= NON_RUN; // answer was from WC => not really executed
    else
      m_has_been_run= RUN;
  }

void mark_as_not_run()
  {
    m_has_been_run= NON_RUN;
  }

private:
  enum {NON_RUN, QC, RUN} m_has_been_run;
#endif
}; // class sp_instr : public Sql_alloc

/**
  Auxilary class to which instructions delegate responsibility
  for handling LEX and preparations before executing statement
  or calculating complex expression.

Exist mainly to avoid having double hierarchy between instruction
  classes.

@todo
    Add ability to not store LEX and do any preparations if
    expression used is simple.
*/

class sp_lex_keeper
{
  /** Prevent use of these */
  sp_lex_keeper(const sp_lex_keeper &);
  void operator=(sp_lex_keeper &);
public:

sp_lex_keeper(LEX *lex, bool lex_resp)
    : m_lex(lex), m_lex_resp(lex_resp), 
      lex_query_tables_own_last(NULL)
  {
    lex->sp_lex_in_use= TRUE;
  }
  virtual ~sp_lex_keeper();

/**
    Prepare execution of instruction using LEX, if requested check whenever
    we have read access to tables used and open/lock them, call instruction's
    exec_core() method, perform cleanup afterwards.
   
    @todo Conflicting comment in sp_head.cc
  */
  int reset_lex_and_exec_core(THD *thd, uint *nextp, bool open_tables,
                              sp_instr* instr);

int cursor_reset_lex_and_exec_core(THD *thd, uint *nextp, bool open_tables,
                                     sp_instr *instr);

inline uint sql_command() const
  {
    return (uint)m_lex->sql_command;
  }

void disable_query_cache()
  {
    m_lex->safe_to_cache_query= 0;
  }

private:

LEX *m_lex;
  /**
    Indicates whenever this sp_lex_keeper instance responsible
    for LEX deletion.
  */
  bool m_lex_resp;

/*
    Support for being able to execute this statement in two modes:
    a) inside prelocked mode set by the calling procedure or its ancestor.
    b) outside of prelocked mode, when this statement enters/leaves
       prelocked mode itself.
  */
  
  /**
    List of additional tables this statement needs to lock when it
    enters/leaves prelocked mode on its own.
  */
  TABLE_LIST *prelocking_tables;

/**
    The value m_lex->query_tables_own_last should be set to this when the
    statement enters/leaves prelocked mode on its own.
  */
  TABLE_LIST **lex_query_tables_own_last;
};

/**
  Call out to some prepared SQL statement.
*/
class sp_instr_stmt : public sp_instr
{
  sp_instr_stmt(const sp_instr_stmt &);	/**< Prevent use of these */
  void operator=(sp_instr_stmt &);

public:

LEX_STRING m_query;		///< For thd->query

sp_instr_stmt(uint ip, sp_pcontext *ctx, LEX *lex)
    : sp_instr(ip, ctx), m_lex_keeper(lex, TRUE)
  {
    m_query.str= 0;
    m_query.length= 0;
  }

virtual ~sp_instr_stmt() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

private:

sp_lex_keeper m_lex_keeper;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;

}; // class sp_instr_stmt : public sp_instr

class sp_instr_set : public sp_instr
{
  sp_instr_set(const sp_instr_set &);	/**< Prevent use of these */
  void operator=(sp_instr_set &);

public:

sp_instr_set(uint ip, sp_pcontext *ctx,
               const Sp_rcontext_handler *rh,
	       uint offset, Item *val,
               LEX *lex, bool lex_resp)
    : sp_instr(ip, ctx),
      m_rcontext_handler(rh), m_offset(offset), m_value(val),
      m_lex_keeper(lex, lex_resp)
  {}

virtual ~sp_instr_set() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

protected:
  sp_rcontext *get_rcontext(THD *thd) const;
  const Sp_rcontext_handler *m_rcontext_handler;
  uint m_offset;		///< Frame offset
  Item *m_value;
  sp_lex_keeper m_lex_keeper;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_set : public sp_instr

/*
  This class handles assignments of a ROW fields:
    DECLARE rec ROW (a INT,b INT);
    SET rec.a= 10;
*/
class sp_instr_set_row_field : public sp_instr_set
{
  sp_instr_set_row_field(const sp_instr_set_row_field &); // Prevent use of this
  void operator=(sp_instr_set_row_field &);
  uint m_field_offset;

public:

sp_instr_set_row_field(uint ip, sp_pcontext *ctx,
                         const Sp_rcontext_handler *rh,
                         uint offset, uint field_offset,
                         Item *val,
                         LEX *lex, bool lex_resp)
    : sp_instr_set(ip, ctx, rh, offset, val, lex, lex_resp),
      m_field_offset(field_offset)
  {}

virtual ~sp_instr_set_row_field() = default;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;
}; // class sp_instr_set_field : public sp_instr_set

/**
  This class handles assignment instructions like this:
  DECLARE
    CURSOR cur IS SELECT * FROM t1;
    rec cur%ROWTYPE;
  BEGIN
    rec.column1:= 10; -- This instruction
  END;

The idea is that during sp_rcontext::create() we do not know the extact
  structure of "rec". It gets resolved at run time, during the corresponding
  sp_instr_cursor_copy_struct::exec_core().

So sp_instr_set_row_field_by_name searches for ROW fields by name,
  while sp_instr_set_row_field (see above) searches for ROW fields by index.
*/
class sp_instr_set_row_field_by_name : public sp_instr_set
{
  // Prevent use of this
  sp_instr_set_row_field_by_name(const sp_instr_set_row_field &);
  void operator=(sp_instr_set_row_field_by_name &);
  const LEX_CSTRING m_field_name;

public:

sp_instr_set_row_field_by_name(uint ip, sp_pcontext *ctx,
                                 const Sp_rcontext_handler *rh,
                                 uint offset, const LEX_CSTRING &field_name,
                                 Item *val,
                                 LEX *lex, bool lex_resp)
    : sp_instr_set(ip, ctx, rh, offset, val, lex, lex_resp),
      m_field_name(field_name)
  {}

virtual ~sp_instr_set_row_field_by_name() = default;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;
}; // class sp_instr_set_field_by_name : public sp_instr_set

/**
  Set NEW/OLD row field value instruction. Used in triggers.
*/
class sp_instr_set_trigger_field : public sp_instr
{
  sp_instr_set_trigger_field(const sp_instr_set_trigger_field &);
  void operator=(sp_instr_set_trigger_field &);

public:

sp_instr_set_trigger_field(uint ip, sp_pcontext *ctx,
                             Item_trigger_field *trg_fld,
                             Item *val, LEX *lex)
    : sp_instr(ip, ctx),
      trigger_field(trg_fld),
      value(val), m_lex_keeper(lex, TRUE)
  {}

virtual ~sp_instr_set_trigger_field() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

private:
  Item_trigger_field *trigger_field;
  Item *value;
  sp_lex_keeper m_lex_keeper;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_trigger_field : public sp_instr

/**
  An abstract class for all instructions with destinations that
  needs to be updated by the optimizer.

Even if not all subclasses will use both the normal destination and
  the continuation destination, we put them both here for simplicity.
*/
class sp_instr_opt_meta : public sp_instr
{
public:

uint m_dest;			///< Where we will go
  uint m_cont_dest;             ///< Where continue handlers will go

sp_instr_opt_meta(uint ip, sp_pcontext *ctx)
    : sp_instr(ip, ctx),
      m_dest(0), m_cont_dest(0), m_optdest(0), m_cont_optdest(0)
  {}

sp_instr_opt_meta(uint ip, sp_pcontext *ctx, uint dest)
    : sp_instr(ip, ctx),
      m_dest(dest), m_cont_dest(0), m_optdest(0), m_cont_optdest(0)
  {}

virtual ~sp_instr_opt_meta() = default;

virtual void set_destination(uint old_dest, uint new_dest)
    = 0;

uint get_cont_dest() const override;

protected:

sp_instr *m_optdest;		///< Used during optimization
  sp_instr *m_cont_optdest;     ///< Used during optimization

}; // class sp_instr_opt_meta : public sp_instr

class sp_instr_jump : public sp_instr_opt_meta
{
  sp_instr_jump(const sp_instr_jump &);	/**< Prevent use of these */
  void operator=(sp_instr_jump &);

public:

sp_instr_jump(uint ip, sp_pcontext *ctx)
    : sp_instr_opt_meta(ip, ctx)
  {}

sp_instr_jump(uint ip, sp_pcontext *ctx, uint dest)
    : sp_instr_opt_meta(ip, ctx, dest)
  {}

virtual ~sp_instr_jump() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override;

uint opt_shortcut_jump(sp_head *sp, sp_instr *start) override;

void opt_move(uint dst, List<sp_instr> *ibp) override;

void backpatch(uint dest, sp_pcontext *dst_ctx) override
  {
    /* Calling backpatch twice is a logic flaw in jump resolution. */
    DBUG_ASSERT(m_dest == 0);
    m_dest= dest;
  }

/**
    Update the destination; used by the optimizer.
  */
  void set_destination(uint old_dest, uint new_dest) override
  {
    if (m_dest == old_dest)
      m_dest= new_dest;
  }

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_jump : public sp_instr_opt_meta

class sp_instr_jump_if_not : public sp_instr_jump
{
  sp_instr_jump_if_not(const sp_instr_jump_if_not &); /**< Prevent use of these */
  void operator=(sp_instr_jump_if_not &);

public:

sp_instr_jump_if_not(uint ip, sp_pcontext *ctx, Item *i, LEX *lex)
    : sp_instr_jump(ip, ctx), m_expr(i),
      m_lex_keeper(lex, TRUE)
  {}

sp_instr_jump_if_not(uint ip, sp_pcontext *ctx, Item *i, uint dest, LEX *lex)
    : sp_instr_jump(ip, ctx, dest), m_expr(i),
      m_lex_keeper(lex, TRUE)
  {}

virtual ~sp_instr_jump_if_not() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override;

/** Override sp_instr_jump's shortcut; we stop here */
  uint opt_shortcut_jump(sp_head *sp, sp_instr *start) override
  {
    return m_ip;
  }

void opt_move(uint dst, List<sp_instr> *ibp) override;

void set_destination(uint old_dest, uint new_dest) override
  {
    sp_instr_jump::set_destination(old_dest, new_dest);
    if (m_cont_dest == old_dest)
      m_cont_dest= new_dest;
  }

private:

Item *m_expr;			///< The condition
  sp_lex_keeper m_lex_keeper;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_jump_if_not : public sp_instr_jump

class sp_instr_preturn : public sp_instr
{
  sp_instr_preturn(const sp_instr_preturn &);	/**< Prevent use of these */
  void operator=(sp_instr_preturn &);

public:

sp_instr_preturn(uint ip, sp_pcontext *ctx)
    : sp_instr(ip, ctx)
  {}

virtual ~sp_instr_preturn() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override
  {
    marked= 1;
    return UINT_MAX;
  }

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_preturn : public sp_instr

class sp_instr_freturn : public sp_instr
{
  sp_instr_freturn(const sp_instr_freturn &);	/**< Prevent use of these */
  void operator=(sp_instr_freturn &);

public:

sp_instr_freturn(uint ip, sp_pcontext *ctx,
		   Item *val, const Type_handler *handler, LEX *lex)
    : sp_instr(ip, ctx), m_value(val), m_type_handler(handler),
      m_lex_keeper(lex, TRUE)
  {}

virtual ~sp_instr_freturn() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override
  {
    marked= 1;
    return UINT_MAX;
  }

protected:

Item *m_value;
  const Type_handler *m_type_handler;
  sp_lex_keeper m_lex_keeper;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_freturn : public sp_instr

class sp_instr_hpush_jump : public sp_instr_jump
{
  sp_instr_hpush_jump(const sp_instr_hpush_jump &); /**< Prevent use of these */
  void operator=(sp_instr_hpush_jump &);

public:

sp_instr_hpush_jump(uint ip,
                      sp_pcontext *ctx,
                      sp_handler *handler)
   :sp_instr_jump(ip, ctx),
    m_handler(handler),
    m_opt_hpop(0),
    m_frame(ctx->current_var_count())
  {
    DBUG_ASSERT(m_handler->condition_values.elements == 0);
  }

virtual ~sp_instr_hpush_jump()
  {
    m_handler->condition_values.empty();
    m_handler= NULL;
  }

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override;

/** Override sp_instr_jump's shortcut; we stop here. */
  uint opt_shortcut_jump(sp_head *sp, sp_instr *start) override
  {
    return m_ip;
  }

void backpatch(uint dest, sp_pcontext *dst_ctx) override
  {
    DBUG_ASSERT(!m_dest || !m_opt_hpop);
    if (!m_dest)
      m_dest= dest;
    else
      m_opt_hpop= dest;
  }

void add_condition(sp_condition_value *condition_value)
  { m_handler->condition_values.push_back(condition_value); }

sp_handler *get_handler()
  { return m_handler; }

private:
  /// Handler.
  sp_handler *m_handler;

/// hpop marking end of handler scope.
  uint m_opt_hpop;

// This attribute is needed for SHOW PROCEDURE CODE only (i.e. it's needed in
  // debug version only). It's used in print().
  uint m_frame;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_hpush_jump : public sp_instr_jump

class sp_instr_hpop : public sp_instr
{
  sp_instr_hpop(const sp_instr_hpop &);	/**< Prevent use of these */
  void operator=(sp_instr_hpop &);

public:

sp_instr_hpop(uint ip, sp_pcontext *ctx, uint count)
    : sp_instr(ip, ctx), m_count(count)
  {}

virtual ~sp_instr_hpop() = default;

void update_count(uint count)
  {
    m_count= count;
  }

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

private:

uint m_count;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_hpop : public sp_instr

class sp_instr_hreturn : public sp_instr_jump
{
  sp_instr_hreturn(const sp_instr_hreturn &);	/**< Prevent use of these */
  void operator=(sp_instr_hreturn &);

public:

sp_instr_hreturn(uint ip, sp_pcontext *ctx)
   :sp_instr_jump(ip, ctx),
    m_frame(ctx->current_var_count())
  {}

virtual ~sp_instr_hreturn() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

/* This instruction will not be short cut optimized. */
  uint opt_shortcut_jump(sp_head *sp, sp_instr *start) override
  {
    return m_ip;
  }

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override;

private:

uint m_frame;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_hreturn : public sp_instr_jump

/** This is DECLARE CURSOR */
class sp_instr_cpush : public sp_instr, public sp_cursor
{
  sp_instr_cpush(const sp_instr_cpush &); /**< Prevent use of these */
  void operator=(sp_instr_cpush &);

public:

sp_instr_cpush(uint ip, sp_pcontext *ctx, LEX *lex, uint offset)
    : sp_instr(ip, ctx), m_lex_keeper(lex, TRUE), m_cursor(offset)
  {}

virtual ~sp_instr_cpush() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

/**
    This call is used to cleanup the instruction when a sensitive
    cursor is closed. For now stored procedures always use materialized
    cursors and the call is not used.
  */
  bool cleanup_stmt(bool /*restore_set_statement_vars*/) override
  { return false; }
private:

sp_lex_keeper m_lex_keeper;
  uint m_cursor;                /**< Frame offset (for debugging) */

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_cpush : public sp_instr

class sp_instr_cpop : public sp_instr
{
  sp_instr_cpop(const sp_instr_cpop &); /**< Prevent use of these */
  void operator=(sp_instr_cpop &);

public:

sp_instr_cpop(uint ip, sp_pcontext *ctx, uint count)
    : sp_instr(ip, ctx), m_count(count)
  {}

virtual ~sp_instr_cpop() = default;

void update_count(uint count)
  {
    m_count= count;
  }

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

private:

uint m_count;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_cpop : public sp_instr

class sp_instr_copen : public sp_instr
{
  sp_instr_copen(const sp_instr_copen &); /**< Prevent use of these */
  void operator=(sp_instr_copen &);

public:

sp_instr_copen(uint ip, sp_pcontext *ctx, uint c)
    : sp_instr(ip, ctx), m_cursor(c)
  {}

virtual ~sp_instr_copen() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

private:

uint m_cursor;		///< Stack index

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_copen : public sp_instr_stmt

/**
  Initialize the structure of a cursor%ROWTYPE variable
  from the LEX containing the cursor SELECT statement.
*/
class sp_instr_cursor_copy_struct: public sp_instr
{
  /**< Prevent use of these */
  sp_instr_cursor_copy_struct(const sp_instr_cursor_copy_struct &);
  void operator=(sp_instr_cursor_copy_struct &);
  sp_lex_keeper m_lex_keeper;
  uint m_cursor;
  uint m_var;
public:
  sp_instr_cursor_copy_struct(uint ip, sp_pcontext *ctx, uint coffs,
                              sp_lex_cursor *lex, uint voffs)
    : sp_instr(ip, ctx), m_lex_keeper(lex, FALSE),
      m_cursor(coffs),
      m_var(voffs)
  {}
  virtual ~sp_instr_cursor_copy_struct() = default;
  int execute(THD *thd, uint *nextp) override;
  int exec_core(THD *thd, uint *nextp) override;
  void print(String *str) override;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
};

class sp_instr_cclose : public sp_instr
{
  sp_instr_cclose(const sp_instr_cclose &); /**< Prevent use of these */
  void operator=(sp_instr_cclose &);

public:

sp_instr_cclose(uint ip, sp_pcontext *ctx, uint c)
    : sp_instr(ip, ctx), m_cursor(c)
  {}

virtual ~sp_instr_cclose() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

private:

uint m_cursor;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_cclose : public sp_instr

class sp_instr_cfetch : public sp_instr
{
  sp_instr_cfetch(const sp_instr_cfetch &); /**< Prevent use of these */
  void operator=(sp_instr_cfetch &);

public:

sp_instr_cfetch(uint ip, sp_pcontext *ctx, uint c, bool error_on_no_data)
    : sp_instr(ip, ctx), m_cursor(c), m_error_on_no_data(error_on_no_data)
  {
    m_varlist.empty();
  }

virtual ~sp_instr_cfetch() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

void add_to_varlist(sp_variable *var)
  {
    m_varlist.push_back(var);
  }

private:

uint m_cursor;
  List<sp_variable> m_varlist;
  bool m_error_on_no_data;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_cfetch : public sp_instr

/*
This class is created for the special fetch instruction
FETCH GROUP NEXT ROW, used in the user-defined aggregate
functions
*/

class sp_instr_agg_cfetch : public sp_instr
{
  sp_instr_agg_cfetch(const sp_instr_cfetch &); /**< Prevent use of these */
  void operator=(sp_instr_cfetch &);

public:

sp_instr_agg_cfetch(uint ip, sp_pcontext *ctx)
    : sp_instr(ip, ctx){}

virtual ~sp_instr_agg_cfetch() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_agg_cfetch : public sp_instr

class sp_instr_error : public sp_instr
{
  sp_instr_error(const sp_instr_error &); /**< Prevent use of these */
  void operator=(sp_instr_error &);

public:

sp_instr_error(uint ip, sp_pcontext *ctx, int errcode)
    : sp_instr(ip, ctx), m_errcode(errcode)
  {}

virtual ~sp_instr_error() = default;

int execute(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override
  {
    marked= 1;
    return UINT_MAX;
  }

private:

int m_errcode;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_error : public sp_instr

class sp_instr_set_case_expr : public sp_instr_opt_meta
{
public:

sp_instr_set_case_expr(uint ip, sp_pcontext *ctx, uint case_expr_id,
                         Item *case_expr, LEX *lex)
    : sp_instr_opt_meta(ip, ctx),
      m_case_expr_id(case_expr_id), m_case_expr(case_expr),
      m_lex_keeper(lex, TRUE)
  {}

virtual ~sp_instr_set_case_expr() = default;

int execute(THD *thd, uint *nextp) override;

int exec_core(THD *thd, uint *nextp) override;

void print(String *str) override;

uint opt_mark(sp_head *sp, List<sp_instr> *leads) override;

void opt_move(uint dst, List<sp_instr> *ibp) override;

void set_destination(uint old_dest, uint new_dest) override
  {
    if (m_cont_dest == old_dest)
      m_cont_dest= new_dest;
  }

private:

uint m_case_expr_id;
  Item *m_case_expr;
  sp_lex_keeper m_lex_keeper;

public:
  PSI_statement_info* get_psi_info() override { return & psi_info; }
  static PSI_statement_info psi_info;
}; // class sp_instr_set_case_expr : public sp_instr_opt_meta

bool check_show_routine_access(THD *thd, sp_head *sp, bool *full_access);

#ifndef NO_EMBEDDED_ACCESS_CHECKS
bool
sp_change_security_context(THD *thd, sp_head *sp,
                           Security_context **backup);
void
sp_restore_security_context(THD *thd, Security_context *backup);

bool
set_routine_security_ctx(THD *thd, sp_head *sp, Security_context **save_ctx);
#endif /* NO_EMBEDDED_ACCESS_CHECKS */

TABLE_LIST *
sp_add_to_query_tables(THD *thd, LEX *lex,
		       const LEX_CSTRING *db, const LEX_CSTRING *name,
                       thr_lock_type locktype,
                       enum_mdl_type mdl_type);

/**
  @} (end of group Stored_Routines)
*/

#endif /* _SP_HEAD_H_ */

cmd: