#include <opt_trace.h>

Public Member Functions
	Opt_trace_start (THD thd_arg, Table_ref tbl, enum enum_sql_command sql_command, List< set_var_base > set_vars, const char query, size_t query_length, sp_printable instr, const CHARSET_INFO query_charset)
	Instantiate this class to start tracing a THD's actions (generally at a statement's start), and to set the "original" query (not transformed, as sent by client) for the new trace. More...

	~Opt_trace_start ()

Private Attributes
Opt_trace_context *const	ctx

bool	error
	whether trace start() had an error More...

Constructor & Destructor Documentation

◆ Opt_trace_start()

Opt_trace_start::Opt_trace_start	(	THD *	thd_arg,
		Table_ref *	tbl,
		enum enum_sql_command	sql_command,
		List< set_var_base > *	set_vars,
		const char *	query,
		size_t	query_length,
		sp_printable *	instr,
		const CHARSET_INFO *	query_charset
	)

Instantiate this class to start tracing a THD's actions (generally at a statement's start), and to set the "original" query (not transformed, as sent by client) for the new trace.

Destructor will end the trace.

If in a routine's instruction, there is no "query". To be helpful to the user, we craft a query using the instruction's print(). We don't leave this to the caller, because it would be inefficient if tracing is off.

Parameters

thd_arg	the THD
tbl	list of tables read/written by the statement.
sql_command	SQL command being prepared or executed
set_vars	what variables are set by this command (only used if sql_command is SQLCOM_SET_OPTION)
query	query
query_length	query's length
instr	routine's instruction, if applicable; if so, 'query' and 'query_length' above are ignored
query_charset	charset which was used to encode this query

Note: Each sub-statement is responsible for ending the trace which it has started; this class achieves this by keeping some memory inside.

◆ ~Opt_trace_start()

Opt_trace_start::~Opt_trace_start ( )

Member Data Documentation

◆ ctx

Opt_trace_context* const Opt_trace_start::ctx

private

◆ error

bool Opt_trace_start::error

private

whether trace start() had an error

The documentation for this class was generated from the following files:

sql/opt_trace.h
sql/opt_trace2server.cc