pfs_example_country.cc File Reference

#include <assert.h>
#include <cstring>
#include "pfs_example_country.h"

Functions
bool	is_duplicate (Country_record *record, int skip_index)
	Check for duplicate value of Primary/Unique Key column(s). More...
PSI_table_handle *	country_open_table (PSI_pos **pos)
	Instantiate Country_Table_Handle at plugin code when corresponding table in performance schema is opened. More...
void	country_close_table (PSI_table_handle *handle)
	Destroy the Country_Table_Handle at plugin code when corresponding table in performance schema is closed. More...
static void	copy_record (Country_record *dest, Country_record *source)
int	country_rnd_next (PSI_table_handle *handle)
int	country_rnd_init (PSI_table_handle *, bool)
int	country_rnd_pos (PSI_table_handle *handle)
int	country_index_init (PSI_table_handle *handle, unsigned int idx, bool, PSI_index_handle **index)
int	country_index_read (PSI_index_handle *index, PSI_key_reader *reader, unsigned int idx, int find_flag)
int	country_index_next (PSI_table_handle *handle)
void	country_reset_position (PSI_table_handle *handle)
int	country_read_column_value (PSI_table_handle *handle, PSI_field *field, unsigned int index)
int	country_write_row_values (PSI_table_handle *handle)
int	country_write_column_value (PSI_table_handle *handle, PSI_field *field, unsigned int index)
int	country_update_row_values (PSI_table_handle *handle)
int	country_update_column_value (PSI_table_handle *handle, PSI_field *field, unsigned int index)
int	country_delete_row_values (PSI_table_handle *handle)
int	country_delete_all_rows (void)
unsigned long long	country_get_row_count (void)
void	init_country_share (PFS_engine_table_share_proxy *share)

Variables
PFS_engine_table_share_proxy	country_st_share
native_mutex_t	LOCK_country_records_array
unsigned int	country_rows_in_table = 0
unsigned int	country_next_available_index = 0
Country_record	country_records_array [COUNTRY_MAX_ROWS]
	An array to keep rows of the tables. More...

Function Documentation

copy_record()

static void copy_record ( Country_record *  dest, Country_record *  source  )

static

country_close_table()

void country_close_table

(

PSI_table_handle *

handle

)

Destroy the Country_Table_Handle at plugin code when corresponding table in performance schema is closed.

country_delete_all_rows()

int country_delete_all_rows

(

void

)

country_delete_row_values()

int country_delete_row_values

(

PSI_table_handle *

handle

)

country_get_row_count()

unsigned long long country_get_row_count

(

void

)

country_index_init()

int country_index_init	(	PSI_table_handle *	handle,
		unsigned int	idx,
		bool	sorted,
		PSI_index_handle **	index
	)

country_index_next()

int country_index_next

(

PSI_table_handle *

handle

)

country_index_read()

int country_index_read	(	PSI_index_handle *	index,
		PSI_key_reader *	reader,
		unsigned int	idx,
		int	find_flag
	)

country_open_table()

PSI_table_handle * country_open_table

(

PSI_pos **

pos

)

Instantiate Country_Table_Handle at plugin code when corresponding table in performance schema is opened.

country_read_column_value()

int country_read_column_value	(	PSI_table_handle *	handle,
		PSI_field *	field,
		unsigned int	index
	)

country_reset_position()

void country_reset_position

(

PSI_table_handle *

handle

)

country_rnd_init()

int country_rnd_init	(	PSI_table_handle *	h,
		bool	scan
	)

country_rnd_next()

int country_rnd_next

(

PSI_table_handle *

handle

)

country_rnd_pos()

int country_rnd_pos

(

PSI_table_handle *

handle

)

country_update_column_value()

int country_update_column_value	(	PSI_table_handle *	handle,
		PSI_field *	field,
		unsigned int	index
	)

country_update_row_values()

int country_update_row_values

(

PSI_table_handle *

handle

)

country_write_column_value()

int country_write_column_value	(	PSI_table_handle *	handle,
		PSI_field *	field,
		unsigned int	index
	)

country_write_row_values()

int country_write_row_values

(

PSI_table_handle *

handle

)

init_country_share()

void init_country_share

(

PFS_engine_table_share_proxy *

share

)

is_duplicate()

bool is_duplicate	(	Country_record *	record,
		int	skip_index
	)

Check for duplicate value of Primary/Unique Key column(s).

A sequential search is being used here, but it is up to the plugin writer to implement his/her own search to make sure duplicate values are not inserted/updated for Primary/Unique Key Column(s).

Parameters

record	record to be checked for duplicate
skip_index	element at this index not to be considered for comparison

Returns

true if duplicate found, false otherwise

Variable Documentation

country_next_available_index

unsigned int country_next_available_index = 0

country_records_array

Country_record country_records_array[COUNTRY_MAX_ROWS]

Initial value:

= {
    {"", 0, "", 0, "", 0, {0, true}, {0, true}, {0, true}, false}}

An array to keep rows of the tables.

When a row is inserted in plugin table, it will be stored here. When a row is queried from plugin table, it will be fetched from here.

country_rows_in_table

unsigned int country_rows_in_table = 0

country_st_share

PFS_engine_table_share_proxy country_st_share

LOCK_country_records_array

native_mutex_t LOCK_country_records_array