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94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/* Copyright (c) 2011, 2023, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifndef PFS_DIGEST_H
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#define PFS_DIGEST_H
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/**
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@file storage/perfschema/pfs_digest.h
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Statement Digest data structures (declarations).
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*/
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#include "pfs_column_types.h"
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#include "lf.h"
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#include "pfs_stat.h"
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#include "sql_digest.h"
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extern bool flag_statements_digest;
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extern size_t digest_max;
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extern ulong digest_lost;
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struct PFS_thread;
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/**
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Structure to store a MD5 hash value (digest) for a statement.
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*/
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struct PFS_digest_key
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{
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unsigned char m_md5[MD5_HASH_SIZE];
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char m_schema_name[NAME_LEN];
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uint m_schema_name_length;
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};
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/** A statement digest stat record. */
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struct PFS_ALIGNED PFS_statements_digest_stat
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{
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/** Internal lock. */
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pfs_lock m_lock;
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/** Digest Schema + MD5 Hash. */
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PFS_digest_key m_digest_key;
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/** Digest Storage. */
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sql_digest_storage m_digest_storage;
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/** Statement stat. */
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PFS_statement_stat m_stat;
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/** First and last seen timestamps.*/
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ulonglong m_first_seen;
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ulonglong m_last_seen;
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/** Reset data for this record. */
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void reset_data(unsigned char* token_array, size_t length);
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/** Reset data and remove index for this record. */
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void reset_index(PFS_thread *thread);
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};
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int init_digest(const PFS_global_param *param);
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void cleanup_digest();
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int init_digest_hash(const PFS_global_param *param);
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void cleanup_digest_hash(void);
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PFS_statement_stat* find_or_create_digest(PFS_thread *thread,
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const sql_digest_storage *digest_storage,
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const char *schema_name,
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uint schema_name_length);
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void reset_esms_by_digest();
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/* Exposing the data directly, for iterators. */
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extern PFS_statements_digest_stat *statements_digest_stat_array;
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extern LF_HASH digest_hash;
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#endif
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