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e6961ea311
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.
178 lines
7.5 KiB
Text
178 lines
7.5 KiB
Text
# restart
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drop table if exists test.marker;
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create table test.marker(a int);
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update performance_schema.setup_consumers set enabled='NO';
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update performance_schema.setup_instruments set enabled='NO';
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update performance_schema.setup_instruments set enabled='YES'
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where name like "wait/io/table/%";
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truncate table performance_schema.events_waits_history_long;
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flush global status;
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flush tables;
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# We are forced to suppress here the server response.
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optimize table mysql.user;
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optimize table mysql.db;
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optimize table mysql.proxies_priv;
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optimize table mysql.roles_mapping;
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optimize table mysql.tables_priv;
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optimize table mysql.procs_priv;
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optimize table mysql.servers;
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optimize table mysql.roles_mapping;
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update performance_schema.setup_consumers set enabled='YES';
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update performance_schema.setup_objects set enabled='YES'
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where object_type='TABLE' and object_schema= 'mysql';
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flush privileges;
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insert into test.marker set a = 1;
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insert into test.marker set a = 1;
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insert into test.marker set a = 1;
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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 5000
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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 10
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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 global status like "performance_schema%";
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Variable_name Value
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Performance_schema_accounts_lost 0
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Performance_schema_cond_classes_lost 0
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Performance_schema_cond_instances_lost 0
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Performance_schema_digest_lost 0
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Performance_schema_file_classes_lost 0
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Performance_schema_file_handles_lost 0
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Performance_schema_file_instances_lost 0
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Performance_schema_hosts_lost 0
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Performance_schema_index_stat_lost 0
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Performance_schema_locker_lost 0
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Performance_schema_memory_classes_lost 0
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Performance_schema_metadata_lock_lost 0
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Performance_schema_mutex_classes_lost 0
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Performance_schema_mutex_instances_lost 0
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Performance_schema_nested_statement_lost 0
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Performance_schema_prepared_statements_lost 0
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Performance_schema_program_lost 0
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Performance_schema_rwlock_classes_lost 0
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Performance_schema_rwlock_instances_lost 0
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Performance_schema_session_connect_attrs_lost 0
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Performance_schema_socket_classes_lost 0
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Performance_schema_socket_instances_lost 0
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Performance_schema_stage_classes_lost 0
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Performance_schema_statement_classes_lost 0
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Performance_schema_table_handles_lost 0
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Performance_schema_table_instances_lost 0
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Performance_schema_table_lock_stat_lost 0
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Performance_schema_thread_classes_lost 0
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Performance_schema_thread_instances_lost 0
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Performance_schema_users_lost 0
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update performance_schema.setup_consumers set enabled='NO';
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select event_name,
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left(source, locate(":", source)) as short_source,
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object_type, object_schema,
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if (locate("#sql-", object_name), "#sql-XXXX", object_name)
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as pretty_name,
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operation, number_of_bytes
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from performance_schema.events_waits_history_long
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where event_name like 'wait/io/table/%'
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and object_schema in ("test", "mysql")
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order by thread_id, event_id;
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event_name short_source object_type object_schema pretty_name operation number_of_bytes
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wait/io/table/sql/handler TABLE mysql global_priv fetch 1
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wait/io/table/sql/handler TABLE mysql global_priv fetch 1
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wait/io/table/sql/handler TABLE mysql global_priv fetch 1
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wait/io/table/sql/handler TABLE mysql global_priv fetch 1
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wait/io/table/sql/handler TABLE mysql global_priv fetch 1
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wait/io/table/sql/handler TABLE mysql global_priv fetch 1
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wait/io/table/sql/handler TABLE mysql db fetch 1
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wait/io/table/sql/handler TABLE mysql proxies_priv fetch 1
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wait/io/table/sql/handler TABLE mysql proxies_priv fetch 1
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wait/io/table/sql/handler TABLE mysql proxies_priv fetch 1
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wait/io/table/sql/handler TABLE mysql proxies_priv fetch 1
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wait/io/table/sql/handler TABLE mysql proxies_priv fetch 1
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wait/io/table/sql/handler TABLE mysql roles_mapping fetch 1
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wait/io/table/sql/handler TABLE mysql tables_priv fetch 1
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wait/io/table/sql/handler TABLE mysql tables_priv fetch 1
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wait/io/table/sql/handler TABLE mysql procs_priv fetch 1
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wait/io/table/sql/handler TABLE mysql servers fetch 1
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wait/io/table/sql/handler TABLE mysql table_stats fetch 1
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wait/io/table/sql/handler TABLE mysql column_stats fetch 1
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wait/io/table/sql/handler TABLE test marker insert 1
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wait/io/table/sql/handler TABLE test marker insert 1
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wait/io/table/sql/handler TABLE test marker insert 1
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show global status like 'performance_schema_%';
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Variable_name Value
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Performance_schema_accounts_lost 0
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Performance_schema_cond_classes_lost 0
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Performance_schema_cond_instances_lost 0
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Performance_schema_digest_lost 0
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Performance_schema_file_classes_lost 0
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Performance_schema_file_handles_lost 0
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Performance_schema_file_instances_lost 0
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Performance_schema_hosts_lost 0
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Performance_schema_index_stat_lost 0
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Performance_schema_locker_lost 0
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Performance_schema_memory_classes_lost 0
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Performance_schema_metadata_lock_lost 0
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Performance_schema_mutex_classes_lost 0
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Performance_schema_mutex_instances_lost 0
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Performance_schema_nested_statement_lost 0
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Performance_schema_prepared_statements_lost 0
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Performance_schema_program_lost 0
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Performance_schema_rwlock_classes_lost 0
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Performance_schema_rwlock_instances_lost 0
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Performance_schema_session_connect_attrs_lost 0
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Performance_schema_socket_classes_lost 0
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Performance_schema_socket_instances_lost 0
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Performance_schema_stage_classes_lost 0
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Performance_schema_statement_classes_lost 0
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Performance_schema_table_handles_lost 0
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Performance_schema_table_instances_lost 0
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Performance_schema_table_lock_stat_lost 0
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Performance_schema_thread_classes_lost 0
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Performance_schema_thread_instances_lost 0
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Performance_schema_users_lost 0
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truncate performance_schema.events_waits_history_long;
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flush global status;
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update performance_schema.setup_consumers set enabled='NO';
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truncate performance_schema.events_waits_history_long;
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drop table test.marker;
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flush global status;
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update performance_schema.setup_instruments set enabled='YES';
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update performance_schema.setup_consumers set enabled='YES';
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update performance_schema.setup_objects set enabled='NO'
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where object_type='TABLE' and object_schema= 'mysql';
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