anonymous_namespace{sql_rewrite.cc} Namespace Reference

Functions
void	comma_maybe (String *str, bool *comma)
	Append a comma to given string if item wasn't the first to be added. More...
bool	append_int (String *str, bool comma, const char *txt, size_t len, long val, int cond)
	Append a key/value pair to a string, with an optional preceding comma. More...
bool	append_str (String *str, bool comma, const char *key, const char *val)
	Append a key/value pair to a string if the value is non-NULL, with an optional preceding comma. More...
void	append_auth_id (const THD *thd, const LEX_USER *user, bool comma, String *str)
	Append the authorization id for the user. More...
void	append_auth_id_identifier (const THD *thd, const LEX_USER *user, bool comma, String *str)
	Append the authorization id for the user. More...
int	lex_user_comp (LEX_USER *l1, LEX_USER *l2)
	Used with List<>::sort for alphabetic sorting of LEX_USER records using user,host as keys. More...
bool	rewrite_query (THD *thd, Consumer_type type, const Rewrite_params *params, String &rlb)
	Util method which does the real rewrite of the SQL statement. More...

Function Documentation

append_auth_id()

void anonymous_namespace{sql_rewrite.cc}::append_auth_id	(	const THD *	thd,
		const LEX_USER *	user,
		bool	comma,
		String *	str
	)

Append the authorization id for the user.

Parameters

[in]	thd	The THD to find the SQL mode
[in]	user	LEX User to retrieve the plugin string
[in]	comma	Separator to be prefixed before adding user info
[in,out]	str	The string in which authID is suffixed

append_auth_id_identifier()

void anonymous_namespace{sql_rewrite.cc}::append_auth_id_identifier	(	const THD *	thd,
		const LEX_USER *	user,
		bool	comma,
		String *	str
	)

Append the authorization id for the user.

This quotes auth_id with ` or " based on the sql_mode set.

Parameters

[in]	thd	The THD to find the SQL mode
[in]	user	LEX User to retrieve the plugin string
[in]	comma	Separator to be prefixed before adding user info
[in,out]	str	The string in which authID is suffixed

append_int()

bool anonymous_namespace{sql_rewrite.cc}::append_int	(	String *	str,
		bool	comma,
		const char *	txt,
		size_t	len,
		long	val,
		int	cond
	)

Append a key/value pair to a string, with an optional preceding comma.

For numeric values.

Parameters

[in,out]	str	The string to append to
	comma	Prepend a comma?
	txt	C-string, must end in a space
	len	strlen(txt)
	val	numeric value
	cond	only append if this evaluates to true

Return values

false

if any subsequent key/value pair would be the first

append_str()

bool anonymous_namespace{sql_rewrite.cc}::append_str	(	String *	str,
		bool	comma,
		const char *	key,
		const char *	val
	)

Append a key/value pair to a string if the value is non-NULL, with an optional preceding comma.

Parameters

[in,out]	str	The string to append to
	comma	Prepend a comma?
	key	C-string: the key, must be non-NULL
	val	C-string: the value

Return values

false

if any subsequent key/value pair would be the first

comma_maybe()

void anonymous_namespace{sql_rewrite.cc}::comma_maybe	(	String *	str,
		bool *	comma
	)

Append a comma to given string if item wasn't the first to be added.

Parameters

[in,out]	str	The string to (maybe) append to.
[in,out]	comma	If true, there are already items in the list. Always true afterwards.

lex_user_comp()

int anonymous_namespace{sql_rewrite.cc}::lex_user_comp	(	LEX_USER *	l1,
		LEX_USER *	l2
	)

Used with List<>::sort for alphabetic sorting of LEX_USER records using user,host as keys.

Parameters

l1	A LEX_USER element
l2	A LEX_USER element

Return values

1	if n1 > n2
0	if n1 <= n2

rewrite_query()

bool anonymous_namespace{sql_rewrite.cc}::rewrite_query	(	THD *	thd,
		Consumer_type	type,
		const Rewrite_params *	params,
		String &	rlb
	)

Util method which does the real rewrite of the SQL statement.

If a Rewriter is available for the specified SQL command then the rewritten query will be stored in the String rlb; otherwise, the string will just be cleared.

Parameters

	thd	The THD to rewrite for.
	type	Purpose of rewriting the query
	params	Wrapper object of parameters in case needed by a SQL rewriter.
[in,out]	rlb	Buffer to return the rewritten query in. Will be empty if no rewriting happened.

Return values

true	If the Query is re-written.
false	Otherwise