table_session_connect.h File Reference

TABLE SESSION_CONNECT (abstract) More...

#include <sys/types.h>
#include "storage/perfschema/cursor_by_thread_connect_attr.h"
#include "storage/perfschema/pfs_column_types.h"
#include "storage/perfschema/table_helper.h"

Go to the source code of this file.

Classes
struct	row_session_connect_attrs
	A row of PERFORMANCE_SCHEMA.SESSION_CONNECT_ATTRS and PERFORMANCE_SCHEMA.SESSION_ACCOUNT_CONNECT_ATTRS. More...
class	PFS_index_session_connect
class	table_session_connect
	Abstract table PERFORMANCE_SCHEMA.SESSION_CONNECT_ATTRS. More...

Macros
#define	MAX_ATTR_NAME_CHARS   32
#define	MAX_ATTR_VALUE_CHARS   1024
#define	MAX_UTF8MB4_BYTES   4

Enumerations
enum	field_offsets { FO_PROCESS_ID , FO_ATTR_NAME , FO_ATTR_VALUE , FO_ORDINAL_POSITION }
	symbolic names for field offsets, keep in sync with field_types More...

Functions
bool	read_nth_attr (const char *connect_attrs, uint connect_attrs_length, const CHARSET_INFO *connect_attrs_cs, uint ordinal, char *attr_name, uint max_attr_name, uint *attr_name_length, char *attr_value, uint max_attr_value, uint *attr_value_length)
	Take the nth attribute name/value pair. More...

Detailed Description

TABLE SESSION_CONNECT (abstract)

Macro Definition Documentation

MAX_ATTR_NAME_CHARS

#define MAX_ATTR_NAME_CHARS   32

MAX_ATTR_VALUE_CHARS

#define MAX_ATTR_VALUE_CHARS   1024

MAX_UTF8MB4_BYTES

#define MAX_UTF8MB4_BYTES   4

Enumeration Type Documentation

field_offsets

enum field_offsets

symbolic names for field offsets, keep in sync with field_types

Enumerator
FO_PROCESS_ID
FO_ATTR_NAME
FO_ATTR_VALUE
FO_ORDINAL_POSITION

Function Documentation

read_nth_attr()

bool read_nth_attr	(	const char *	connect_attrs,
		uint	connect_attrs_length,
		const CHARSET_INFO *	connect_attrs_cs,
		uint	ordinal,
		char *	attr_name,
		uint	max_attr_name,
		uint *	attr_name_length,
		char *	attr_value,
		uint	max_attr_value,
		uint *	attr_value_length
	)

Take the nth attribute name/value pair.

Parse the attributes blob form the beginning, skipping the attributes whose number is lower than the one we seek. When we reach the attribute at an index we're looking for the values are copied to the output parameters. If parsing fails or no more attributes are found the function stops and returns an error code.

Parameters

	connect_attrs	pointer to the connect attributes blob
	connect_attrs_length	length of connect_attrs
	connect_attrs_cs	character set used to encode connect_attrs
	ordinal	index of the attribute we need
[out]	attr_name	buffer to receive the attribute name
	max_attr_name	max size of attr_name in bytes
[out]	attr_name_length	number of bytes written in attr_name
[out]	attr_value	buffer to receive the attribute name
	max_attr_value	max size of attr_value in bytes
[out]	attr_value_length	number of bytes written in attr_value

Returns

status

Return values

true	requested attribute pair is found and copied
false	error. Either because of parsing or too few attributes.