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f11504af51
This patch adds support for SYS_REFCURSOR (a weakly typed cursor)
for both sql_mode=ORACLE and sql_mode=DEFAULT.
Works as a regular stored routine variable, parameter and return value:
- can be passed as an IN parameter to stored functions and procedures
- can be passed as an INOUT and OUT parameter to stored procedures
- can be returned from a stored function
Note, strongly typed REF CURSOR will be added separately.
Note, to maintain dependencies easier, some parts of sql_class.h
and item.h were moved to new header files:
- select_results.h:
class select_result_sink
class select_result
class select_result_interceptor
- sp_cursor.h:
class sp_cursor_statistics
class sp_cursor
- sp_rcontext_handler.h
class Sp_rcontext_handler and its descendants
The implementation consists of the following parts:
- A new class sp_cursor_array deriving from Dynamic_array
- A new class Statement_rcontext which contains data shared
between sub-statements of a compound statement.
It has a member m_statement_cursors of the sp_cursor_array data type,
as well as open cursor counter. THD inherits from Statement_rcontext.
- A new data type handler Type_handler_sys_refcursor in plugins/type_cursor/
It is designed to store uint16 references -
positions of the cursor in THD::m_statement_cursors.
- Type_handler_sys_refcursor suppresses some derived numeric features.
When a SYS_REFCURSOR variable is used as an integer an error is raised.
- A new abstract class sp_instr_fetch_cursor. It's needed to share
the common code between "OPEN cur" (for static cursors) and
"OPER cur FOR stmt" (for SYS_REFCURSORs).
- New sp_instr classes:
* sp_instr_copen_by_ref - OPEN sys_ref_curor FOR stmt;
* sp_instr_cfetch_by_ref - FETCH sys_ref_cursor INTO targets;
* sp_instr_cclose_by_ref - CLOSE sys_ref_cursor;
* sp_instr_destruct_variable - to destruct SYS_REFCURSOR variables when
the execution goes out of the BEGIN..END block
where SYS_REFCURSOR variables are declared.
- New methods in LEX:
* sp_open_cursor_for_stmt - handles "OPEN sys_ref_cursor FOR stmt".
* sp_add_instr_fetch_cursor - "FETCH cur INTO targets" for both
static cursors and SYS_REFCURSORs.
* sp_close - handles "CLOSE cur" both for static cursors and SYS_REFCURSORs.
- Changes in cursor functions to handle both static cursors and SYS_REFCURSORs:
* Item_func_cursor_isopen
* Item_func_cursor_found
* Item_func_cursor_notfound
* Item_func_cursor_rowcount
- A new system variable @@max_open_cursors - to limit the number
of cursors (static and SYS_REFCURSORs) opened at the same time.
Its allowed range is [0-65536], with 50 by default.
- A new virtual method Type_handler::can_return_bool() telling
if calling item->val_bool() is allowed for Items of this data type,
or if otherwise the "Illegal parameter for operation" error should be raised
at fix_fields() time.
- New methods in Sp_rcontext_handler:
* get_cursor()
* get_cursor_by_ref()
- A new class Sp_rcontext_handler_statement to handle top level statement
wide cursors which are shared by all substatements.
- A new virtual method expr_event_handler() in classes Item and Field.
It's needed to close (and make available for a new OPEN)
unused THD::m_statement_cursors elements which do not have any references
any more. It can happen in various moments in time, e.g.
* after evaluation parameters of an SQL routine
* after assigning a cursor expression into a SYS_REFCURSOR variable
* when leaving a BEGIN..END block with SYS_REFCURSOR variables
* after setting OUT/INOUT routine actual parameters from formal
parameters.
336 lines
12 KiB
Text
336 lines
12 KiB
Text
show databases;
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Database
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information_schema
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mtr
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mysql
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performance_schema
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sys
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test
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select count(*) from performance_schema.performance_timers;
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count(*)
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5
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select count(*) from performance_schema.setup_consumers;
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count(*)
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15
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select count(*) > 4 from performance_schema.setup_instruments;
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count(*) > 4
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1
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select count(*) from performance_schema.setup_timers;
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count(*)
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5
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Warnings:
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Warning 1287 'performance_schema.setup_timers' is deprecated and will be removed in a future release
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select * from performance_schema.accounts;
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select * from performance_schema.cond_instances;
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select * from performance_schema.events_stages_current;
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select * from performance_schema.events_stages_history;
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select * from performance_schema.events_stages_history_long;
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select * from performance_schema.events_stages_summary_by_account_by_event_name;
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select * from performance_schema.events_stages_summary_by_host_by_event_name;
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select * from performance_schema.events_stages_summary_by_thread_by_event_name;
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select * from performance_schema.events_stages_summary_by_user_by_event_name;
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select * from performance_schema.events_stages_summary_global_by_event_name;
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select * from performance_schema.events_statements_current;
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select * from performance_schema.events_statements_history;
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select * from performance_schema.events_statements_history_long;
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select * from performance_schema.events_statements_summary_by_account_by_event_name;
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select * from performance_schema.events_statements_summary_by_digest;
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select * from performance_schema.events_statements_summary_by_host_by_event_name;
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select * from performance_schema.events_statements_summary_by_thread_by_event_name;
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select * from performance_schema.events_statements_summary_by_user_by_event_name;
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select * from performance_schema.events_statements_summary_global_by_event_name;
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select * from performance_schema.events_transactions_current;
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select * from performance_schema.events_transactions_history;
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select * from performance_schema.events_transactions_history_long;
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select * from performance_schema.events_transactions_summary_by_account_by_event_name;
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select * from performance_schema.events_transactions_summary_by_host_by_event_name;
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select * from performance_schema.events_transactions_summary_by_thread_by_event_name;
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select * from performance_schema.events_transactions_summary_by_user_by_event_name;
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select * from performance_schema.events_transactions_summary_global_by_event_name;
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select * from performance_schema.events_waits_current;
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select * from performance_schema.events_waits_history;
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select * from performance_schema.events_waits_history_long;
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select * from performance_schema.events_waits_summary_by_account_by_event_name;
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select * from performance_schema.events_waits_summary_by_host_by_event_name;
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select * from performance_schema.events_waits_summary_by_instance;
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select * from performance_schema.events_waits_summary_by_thread_by_event_name;
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select * from performance_schema.events_waits_summary_by_user_by_event_name;
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select * from performance_schema.events_waits_summary_global_by_event_name;
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select * from performance_schema.memory_summary_by_account_by_event_name;
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select * from performance_schema.memory_summary_by_host_by_event_name;
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select * from performance_schema.memory_summary_by_thread_by_event_name;
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select * from performance_schema.memory_summary_by_user_by_event_name;
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select * from performance_schema.memory_summary_global_by_event_name;
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select * from performance_schema.file_instances;
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select * from performance_schema.file_summary_by_event_name;
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select * from performance_schema.file_summary_by_instance;
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select * from performance_schema.host_cache;
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select * from performance_schema.hosts;
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select * from performance_schema.memory_summary_by_account_by_event_name;
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select * from performance_schema.memory_summary_by_host_by_event_name;
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select * from performance_schema.memory_summary_by_thread_by_event_name;
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select * from performance_schema.memory_summary_by_user_by_event_name;
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select * from performance_schema.memory_summary_global_by_event_name;
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select * from performance_schema.metadata_locks;
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select * from performance_schema.mutex_instances;
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select * from performance_schema.objects_summary_global_by_type;
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select * from performance_schema.performance_timers;
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select * from performance_schema.rwlock_instances;
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select * from performance_schema.session_account_connect_attrs;
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select * from performance_schema.session_connect_attrs;
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select * from performance_schema.setup_actors;
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select * from performance_schema.setup_consumers;
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select * from performance_schema.setup_instruments;
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select * from performance_schema.setup_objects;
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select * from performance_schema.setup_timers;
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select * from performance_schema.socket_instances;
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select * from performance_schema.socket_summary_by_instance;
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select * from performance_schema.socket_summary_by_event_name;
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select * from performance_schema.table_handles;
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select * from performance_schema.table_io_waits_summary_by_index_usage;
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select * from performance_schema.table_io_waits_summary_by_table;
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select * from performance_schema.table_lock_waits_summary_by_table;
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select * from performance_schema.threads;
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select * from performance_schema.users;
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select * from performance_schema.replication_connection_configuration;
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select * from performance_schema.replication_applier_configuration;
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select * from performance_schema.replication_applier_status;
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select * from performance_schema.replication_applier_status_by_coordinator;
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select * from performance_schema.global_status;
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select * from performance_schema.status_by_thread;
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select * from performance_schema.status_by_user;
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select * from performance_schema.status_by_host;
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select * from performance_schema.status_by_account;
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select * from performance_schema.session_status;
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show global variables like "performance_schema%";
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Variable_name Value
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performance_schema ON
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performance_schema_accounts_size 100
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performance_schema_digests_size 200
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performance_schema_events_stages_history_long_size 1000
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performance_schema_events_stages_history_size 10
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performance_schema_events_statements_history_long_size 1000
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performance_schema_events_statements_history_size 10
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performance_schema_events_transactions_history_long_size 1000
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performance_schema_events_transactions_history_size 10
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performance_schema_events_waits_history_long_size 10000
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performance_schema_events_waits_history_size 10
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performance_schema_hosts_size 100
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performance_schema_max_cond_classes 90
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performance_schema_max_cond_instances 1500
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performance_schema_max_digest_length 1024
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performance_schema_max_file_classes 80
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performance_schema_max_file_handles 32768
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performance_schema_max_file_instances 10000
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performance_schema_max_index_stat 5000
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performance_schema_max_memory_classes 320
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performance_schema_max_metadata_locks 10000
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performance_schema_max_mutex_classes 210
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performance_schema_max_mutex_instances 5000
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performance_schema_max_prepared_statements_instances 100
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performance_schema_max_program_instances 7
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performance_schema_max_rwlock_classes 50
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performance_schema_max_rwlock_instances 5000
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performance_schema_max_socket_classes 10
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performance_schema_max_socket_instances 1000
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performance_schema_max_sql_text_length 1024
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performance_schema_max_stage_classes 160
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performance_schema_max_statement_classes 227
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performance_schema_max_statement_stack 2
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performance_schema_max_table_handles 1000
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performance_schema_max_table_instances 500
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performance_schema_max_table_lock_stat 500
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performance_schema_max_thread_classes 50
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performance_schema_max_thread_instances 400
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performance_schema_session_connect_attrs_size 2048
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performance_schema_setup_actors_size 100
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performance_schema_setup_objects_size 100
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performance_schema_users_size 100
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show engine PERFORMANCE_SCHEMA status;
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show global status like "performance_schema%";
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show global variables like "performance_schema_max_program_instances";
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Variable_name Value
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performance_schema_max_program_instances 7
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show global variables like "performance_schema_max_statement_stack";
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Variable_name Value
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performance_schema_max_statement_stack 2
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#####################
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# Setup
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#####################
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# SET-UP
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CREATE DATABASE nested_sp;
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USE nested_sp;
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CREATE TABLE t1(
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id CHAR(16) NOT NULL DEFAULT '',
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data INT NOT NULL
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);
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CREATE TABLE t2(
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n INT UNSIGNED NOT NULL,
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f BIGINT UNSIGNED
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);
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############################
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# Creating Stored Programs #
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############################
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CREATE PROCEDURE c1(x INT)
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CALL c2("c", x)|
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CREATE PROCEDURE c2(s CHAR(16), x INT)
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CALL c3(x, s)|
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CREATE PROCEDURE c3(x INT, s CHAR(16))
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CALL c4("level", x, s)|
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CREATE PROCEDURE c4(l CHAR(8), x INT, s CHAR(16))
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INSERT INTO t1 VALUES (concat(l,s), x)|
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CREATE PROCEDURE iotest(x1 CHAR(16), x2 CHAR(16), y INT)
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BEGIN
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CALL inc2(x2, y);
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INSERT INTO t1 VALUES (x1, y);
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END|
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CREATE PROCEDURE inc2(x CHAR(16), y INT)
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BEGIN
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CALL inc(y);
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INSERT INTO t1 VALUES (x, y);
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END|
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CREATE PROCEDURE inc(inout io INT)
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SET io = io + 1|
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CREATE FUNCTION mul(x INT, y INT) RETURNS INT
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RETURN x*y|
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CREATE FUNCTION inc(i INT) RETURNS INT
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RETURN i+1|
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CREATE FUNCTION fac(n INT UNSIGNED) RETURNS BIGINT UNSIGNED
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BEGIN
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DECLARE f BIGINT UNSIGNED DEFAULT 1;
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WHILE n > 1 DO
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SET f = f * n;
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SET n = n - 1;
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END WHILE;
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RETURN f;
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END|
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CREATE FUNCTION fun(i INT, u INT UNSIGNED) RETURNS DOUBLE
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RETURN mul(inc(i), fac(u))|
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CREATE PROCEDURE ifac(n INT UNSIGNED)
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BEGIN
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DECLARE i BIGINT UNSIGNED DEFAULT 1;
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IF n > 20 THEN
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SET n = 20; # bigint overflow otherwise
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END IF;
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WHILE i <= n DO
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BEGIN
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INSERT INTO t2 VALUES (i, fac(i));
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SET i = i + 1;
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END;
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END WHILE;
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END|
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CREATE TRIGGER trg AFTER INSERT ON t1 FOR EACH ROW
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CALL ifac(10)|
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TRUNCATE performance_schema.events_statements_summary_by_program;
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SELECT OBJECT_TYPE, OBJECT_NAME, OBJECT_SCHEMA FROM
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performance_schema.events_statements_summary_by_program
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WHERE OBJECT_SCHEMA='nested_sp' ORDER BY OBJECT_NAME;
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OBJECT_TYPE OBJECT_NAME OBJECT_SCHEMA
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Flush status;
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show global status like "%performance_schema_program_lost%";
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Variable_name Value
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Performance_schema_program_lost 0
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show global status like "%performance_schema_nested_statement_lost%";
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Variable_name Value
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Performance_schema_nested_statement_lost 0
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#####################
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# Executing Queries
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#####################
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#####################
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# Executing queries #
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#####################
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CALL c1(42);
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SELECT * FROM t1;
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id data
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levelc 42
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DELETE FROM t1;
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CALL iotest("io1", "io2", 1);
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SELECT * FROM t1 ORDER BY data DESC;
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id data
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io2 2
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io1 1
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DELETE FROM t1;
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SELECT fun(6,10);
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fun(6,10)
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25401600
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INSERT INTO t1 VALUES (20,13);
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SELECT * FROM t2;
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n f
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1 1
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2 2
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3 6
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4 24
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5 120
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6 720
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7 5040
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8 40320
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9 362880
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10 3628800
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1 1
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2 2
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3 6
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4 24
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5 120
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6 720
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7 5040
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8 40320
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9 362880
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10 3628800
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1 1
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2 2
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3 6
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4 24
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5 120
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6 720
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7 5040
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8 40320
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9 362880
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10 3628800
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1 1
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2 2
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3 6
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4 24
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5 120
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6 720
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7 5040
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8 40320
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9 362880
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10 3628800
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###########################################
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# Quering PS statement summary table #
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###########################################
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SELECT OBJECT_TYPE, OBJECT_NAME, OBJECT_SCHEMA
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FROM performance_schema.events_statements_summary_by_program
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WHERE OBJECT_SCHEMA='nested_sp' ORDER BY OBJECT_NAME;
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OBJECT_TYPE OBJECT_NAME OBJECT_SCHEMA
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PROCEDURE c1 nested_sp
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PROCEDURE c2 nested_sp
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PROCEDURE c3 nested_sp
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PROCEDURE c4 nested_sp
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FUNCTION fac nested_sp
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PROCEDURE ifac nested_sp
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TRIGGER trg nested_sp
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show global status like "%performance_schema_program_lost%";
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Variable_name Value
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Performance_schema_program_lost 6
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show global status like "%performance_schema_nested_statement_lost%";
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Variable_name Value
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Performance_schema_nested_statement_lost 1062
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#####################
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# Cleanup
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#####################
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DROP PROCEDURE c4;
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DROP PROCEDURE c3;
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DROP PROCEDURE c2;
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DROP PROCEDURE c1;
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DROP PROCEDURE inc;
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DROP PROCEDURE inc2;
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DROP PROCEDURE iotest;
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DROP FUNCTION mul;
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DROP FUNCTION inc;
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DROP FUNCTION fac;
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DROP FUNCTION fun;
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DROP PROCEDURE ifac;
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DROP TRIGGER trg;
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DROP TABLE t1,t2;
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DROP DATABASE nested_sp;
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