table_session_connect.cc File Reference

TABLE SESSION_CONNECT (abstract). More...

#include "storage/perfschema/table_session_connect.h"
#include <assert.h>
#include "my_compiler.h"
#include "my_inttypes.h"
#include "sql/field.h"
#include "sql/table.h"
#include "storage/perfschema/pfs_buffer_container.h"

Functions
static bool	parse_length_encoded_string (const char **ptr, char *dest, uint dest_size, uint *copied_len, const char *start_ptr, uint input_length, const CHARSET_INFO *from_cs, uint nchars_max)
	Take a length encoded string. More...
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).

Function Documentation

parse_length_encoded_string()

static bool parse_length_encoded_string ( const char **  ptr, char *  dest, uint  dest_size, uint *  copied_len, const char *  start_ptr, uint  input_length, const CHARSET_INFO *  from_cs, uint  nchars_max  )

static

Take a length encoded string.

• ptr inout the input string array
• dest where to store the result
• dest_size max size of dest
• copied_len the actual length of the data copied
• start_ptr pointer to the start of input
• input_length the length of the incoming data
• from_cs character set in which ptr is encoded
• nchars_max maximum number of characters to read

  Returns

  status

  Return values

  true	parsing failed
  false	parsing succeeded

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.