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/* Copyright (c) 2011, 2015, 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_DIGEST_H
#define PFS_DIGEST_H
/**
@file storage/perfschema/pfs_digest.h
Statement Digest data structures (declarations).
*/
#include "pfs_column_types.h"
#include "lf.h"
#include "pfs_stat.h"
#include "sql_digest.h"
extern bool flag_statements_digest;
extern size_t digest_max;
extern ulong digest_lost;
struct PFS_thread;
/**
Structure to store a MD5 hash value (digest) for a statement.
*/
struct PFS_digest_key
{
unsigned char m_md5[MD5_HASH_SIZE];
char m_schema_name[NAME_LEN];
uint m_schema_name_length;
};
/** A statement digest stat record. */
struct PFS_ALIGNED PFS_statements_digest_stat
{
/** Digest Schema + MD5 Hash. */
PFS_digest_key m_digest_key;
/** Digest Storage. */
sql_digest_storage m_digest_storage;
/** Statement stat. */
PFS_statement_stat m_stat;
/** First and last seen timestamps.*/
ulonglong m_first_seen;
ulonglong m_last_seen;
/** Reset data for this record. */
void reset_data(unsigned char* token_array, uint length);
/** Reset data and remove index for this record. */
void reset_index(PFS_thread *thread);
};
int init_digest(const PFS_global_param *param);
void cleanup_digest();
int init_digest_hash(void);
void cleanup_digest_hash(void);
PFS_statement_stat* find_or_create_digest(PFS_thread *thread,
const sql_digest_storage *digest_storage,
const char *schema_name,
uint schema_name_length);
void reset_esms_by_digest();
/* Exposing the data directly, for iterators. */
extern PFS_statements_digest_stat *statements_digest_stat_array;
extern LF_HASH digest_hash;
#endif
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