pfs_digest.h File Reference

#include "pfs_column_types.h"
#include "lf.h"
#include "pfs_stat.h"

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Classes
struct	PFS_digest_key
struct	PFS_statements_digest_stat

Macros
#define	PFS_SIZE_OF_A_TOKEN   2
#define	PFS_MD5_SIZE   16

Functions
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, PSI_digest_storage *digest_storage, const char *schema_name, uint schema_name_length)
void	get_digest_text (char *digest_text, PSI_digest_storage *digest_storage)
void	reset_esms_by_digest ()
struct PSI_digest_locker *	pfs_digest_start_v1 (PSI_statement_locker *locker)
PSI_digest_locker *	pfs_digest_add_token_v1 (PSI_digest_locker *locker, uint token, OPAQUE_LEX_YYSTYPE *yylval)
int	read_token (PSI_digest_storage *digest_storage, int index, uint *tok)
void	store_token (PSI_digest_storage *digest_storage, uint token)
int	read_identifier (PSI_digest_storage *digest_storage, int index, char **id_string, int *id_length)
void	store_token_identifier (PSI_digest_storage *digest_storage, uint token, uint id_length, const char *id_name)

Variables
bool	flag_statements_digest
ulong	digest_max
ulong	digest_lost
PFS_statements_digest_stat *	statements_digest_stat_array
LF_HASH	digest_hash

Detailed Description

Statement Digest data structures (implementation).

Statement Digest data structures (declarations).

Definition in file pfs_digest.h.

Function Documentation

void cleanup_digest

(

void

)

Cleanup table EVENTS_STATEMENTS_SUMMARY_BY_DIGEST.

Definition at line 109 of file pfs_digest.cc.

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int init_digest

(

const PFS_global_param *

param

)

Initialize table EVENTS_STATEMENTS_SUMMARY_BY_DIGEST.

Parameters

digest_sizing

Definition at line 80 of file pfs_digest.cc.

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int init_digest_hash

(

void

)

Initialize the digest hash.

Returns

0 on success

Definition at line 138 of file pfs_digest.cc.

int read_identifier ( PSI_digest_storage *  digest_storage, int  index, char **  id_string, int *  id_length  )

inline

Read an identifier from token array.

Definition at line 165 of file pfs_digest.h.

int read_token ( PSI_digest_storage *  digest_storage, int  index, uint *  tok  )

inline

Read a single token from token array.

Definition at line 123 of file pfs_digest.h.

void store_token ( PSI_digest_storage *  digest_storage, uint  token  )

inline

Store a single token in token array.

Definition at line 144 of file pfs_digest.h.

void store_token_identifier ( PSI_digest_storage *  digest_storage, uint  token, uint  id_length, const char *  id_name  )

inline

Store an identifier in token array.

Definition at line 189 of file pfs_digest.h.

Variable Documentation

ulong digest_max

Token array : Token array is an array of bytes to store tokens recieved during parsing. Following is the way token array is formed.

...<non-id-token><non-id-token><id-token><id_len><id_text>...

For Ex: SELECT * FROM T1; <SELECT_TOKEN><*><FROM_TOKEN><ID_TOKEN><2><T1>

Definition at line 60 of file pfs_digest.cc.

bool flag_statements_digest

Consumer flag for table EVENTS_STATEMENTS_SUMMARY_BY_DIGEST.

Definition at line 66 of file pfs_digest.cc.

PFS_statements_digest_stat* statements_digest_stat_array

EVENTS_STATEMENTS_HISTORY_LONG circular buffer.

Definition at line 64 of file pfs_digest.cc.