/mysql-5.5.25a/storage/perfschema/pfs_engine_table.h
C Header | 316 lines | 176 code | 56 blank | 84 comment | 0 complexity | f1e76cf867688a68de06c94d2b396c42 MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause
- /* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- 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,
- 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
- #ifndef PFS_ENGINE_TABLE_H
- #define PFS_ENGINE_TABLE_H
- #include "sql_acl.h" /* struct ACL_* */
- /**
- @file storage/perfschema/pfs_engine_table.h
- Performance schema tables (declarations).
- */
- class Field;
- struct PFS_engine_table_share;
- /**
- @addtogroup Performance_schema_engine
- @{
- */
- /**
- An abstract PERFORMANCE_SCHEMA table.
- Every table implemented in the performance schema schema and storage engine
- derives from this class.
- */
- class PFS_engine_table
- {
- public:
- static const PFS_engine_table_share*
- find_engine_table_share(const char *name);
- int read_row(TABLE *table, unsigned char *buf, Field **fields);
- int update_row(TABLE *table, const unsigned char *old_buf,
- unsigned char *new_buf, Field **fields);
- /** Fetch the next row in this cursor. */
- virtual int rnd_next(void)= 0;
- /**
- Fetch a row by position.
- @param pos position to fetch
- */
- virtual int rnd_pos(const void *pos)= 0;
- void get_position(void *ref);
- void set_position(const void *ref);
- virtual void reset_position(void)= 0;
- /** Destructor. */
- virtual ~PFS_engine_table()
- {}
- protected:
- /**
- Read the current row values.
- @param table Table handle
- @param buf row buffer
- @param fields Table fields
- @param read_all true if all columns are read.
- */
- virtual int read_row_values(TABLE *table, unsigned char *buf,
- Field **fields, bool read_all)= 0;
- /**
- Update the current row values.
- @param table Table handle
- @param old_buf old row buffer
- @param new_buf new row buffer
- @param fields Table fields
- */
- virtual int update_row_values(TABLE *table, const unsigned char *old_buf,
- unsigned char *new_buf, Field **fields);
- /**
- Constructor.
- @param share table share
- @param pos address of the m_pos position member
- */
- PFS_engine_table(const PFS_engine_table_share *share, void *pos)
- : m_share_ptr(share), m_pos_ptr(pos)
- {}
- void set_field_ulong(Field *f, ulong value);
- void set_field_ulonglong(Field *f, ulonglong value);
- void set_field_varchar_utf8(Field *f, const char* str, uint len);
- void set_field_enum(Field *f, ulonglong value);
- ulonglong get_field_enum(Field *f);
- /** Table share. */
- const PFS_engine_table_share *m_share_ptr;
- /** Opaque pointer to the m_pos position of this cursor. */
- void *m_pos_ptr;
- };
- /** Callback to open a table. */
- typedef PFS_engine_table* (*pfs_open_table_t)(void);
- /** Callback to write a row. */
- typedef int (*pfs_write_row_t)(TABLE *table,
- unsigned char *buf, Field **fields);
- /** Callback to delete all rows. */
- typedef int (*pfs_delete_all_rows_t)(void);
- /**
- A PERFORMANCE_SCHEMA table share.
- This data is shared by all the table handles opened on the same table.
- */
- struct PFS_engine_table_share
- {
- static void check_all_tables(THD *thd);
- void check_one_table(THD *thd);
- static void init_all_locks(void);
- static void delete_all_locks(void);
- /** Table name. */
- LEX_STRING m_name;
- /** Table ACL. */
- const ACL_internal_table_access *m_acl;
- /** Open table function. */
- pfs_open_table_t m_open_table;
- /** Write row function. */
- pfs_write_row_t m_write_row;
- /** Delete all rows function. */
- pfs_delete_all_rows_t m_delete_all_rows;
- /**
- Number or records.
- This number does not need to be precise,
- it is used by the optimizer to decide if the table
- has 0, 1, or many records.
- */
- ha_rows m_records;
- /** Length of the m_pos position structure. */
- uint m_ref_length;
- /** The lock, stored on behalf of the SQL layer. */
- THR_LOCK *m_thr_lock_ptr;
- /** Table fields definition. */
- TABLE_FIELD_DEF *m_field_def;
- /** Schema integrity flag. */
- bool m_checked;
- };
- class PFS_readonly_acl : public ACL_internal_table_access
- {
- public:
- PFS_readonly_acl()
- {}
- ~PFS_readonly_acl()
- {}
- ACL_internal_access_result check(ulong want_access, ulong *save_priv) const;
- };
- extern PFS_readonly_acl pfs_readonly_acl;
- class PFS_truncatable_acl : public ACL_internal_table_access
- {
- public:
- PFS_truncatable_acl()
- {}
- ~PFS_truncatable_acl()
- {}
- ACL_internal_access_result check(ulong want_access, ulong *save_priv) const;
- };
- extern PFS_truncatable_acl pfs_truncatable_acl;
- class PFS_updatable_acl : public ACL_internal_table_access
- {
- public:
- PFS_updatable_acl()
- {}
- ~PFS_updatable_acl()
- {}
- ACL_internal_access_result check(ulong want_access, ulong *save_priv) const;
- };
- extern PFS_updatable_acl pfs_updatable_acl;
- class PFS_editable_acl : public ACL_internal_table_access
- {
- public:
- PFS_editable_acl()
- {}
- ~PFS_editable_acl()
- {}
- ACL_internal_access_result check(ulong want_access, ulong *save_priv) const;
- };
- extern PFS_editable_acl pfs_editable_acl;
- class PFS_unknown_acl : public ACL_internal_table_access
- {
- public:
- PFS_unknown_acl()
- {}
- ~PFS_unknown_acl()
- {}
- ACL_internal_access_result check(ulong want_access, ulong *save_priv) const;
- };
- extern PFS_unknown_acl pfs_unknown_acl;
- /** Position of a cursor, for simple iterations. */
- struct PFS_simple_index
- {
- /** Current row index. */
- uint m_index;
- PFS_simple_index(uint index)
- : m_index(index)
- {}
- void set_at(const struct PFS_simple_index *other)
- { m_index= other->m_index; }
- void set_after(const struct PFS_simple_index *other)
- { m_index= other->m_index + 1; }
- void next(void)
- { m_index++; }
- };
- struct PFS_double_index
- {
- /** Outer index. */
- uint m_index_1;
- /** Current index within index_1. */
- uint m_index_2;
- PFS_double_index(uint index_1, uint index_2)
- : m_index_1(index_1), m_index_2(index_2)
- {}
- void set_at(const struct PFS_double_index *other)
- {
- m_index_1= other->m_index_1;
- m_index_2= other->m_index_2;
- }
- void set_after(const struct PFS_double_index *other)
- {
- m_index_1= other->m_index_1;
- m_index_2= other->m_index_2 + 1;
- }
- };
- struct PFS_triple_index
- {
- /** Outer index. */
- uint m_index_1;
- /** Current index within index_1. */
- uint m_index_2;
- /** Current index within index_2. */
- uint m_index_3;
- PFS_triple_index(uint index_1, uint index_2, uint index_3)
- : m_index_1(index_1), m_index_2(index_2), m_index_3(index_3)
- {}
- void set_at(const struct PFS_triple_index *other)
- {
- m_index_1= other->m_index_1;
- m_index_2= other->m_index_2;
- m_index_3= other->m_index_3;
- }
- void set_after(const struct PFS_triple_index *other)
- {
- m_index_1= other->m_index_1;
- m_index_2= other->m_index_2;
- m_index_3= other->m_index_3 + 1;
- }
- };
- struct PFS_instrument_view_constants
- {
- static const uint VIEW_MUTEX= 1;
- static const uint VIEW_RWLOCK= 2;
- static const uint VIEW_COND= 3;
- static const uint VIEW_FILE= 4;
- };
- struct PFS_object_view_constants
- {
- static const uint VIEW_TABLE= 1;
- static const uint VIEW_EVENT= 2;
- static const uint VIEW_PROCEDURE= 3;
- static const uint VIEW_FUNCTION= 4;
- };
- bool pfs_show_status(handlerton *hton, THD *thd,
- stat_print_fn *print, enum ha_stat_type stat);
- /** @} */
- #endif