anonymous_namespace{sql_select.cc} Namespace Reference

Classes
class	store_key_const_item
class	store_key_json_item

Functions
bool	has_secondary_engine_defined (const LEX *lex, const Table_ref **tref)
void	accumulate_statement_cost (const LEX *lex)
	Calculates the cost of executing a statement, including all its subqueries and stores it in thd->m_current_query_cost. More...
bool	SecondaryEngineCallPrePrepareHook (THD *thd, const LEX_CSTRING &secondary_engine)
	Gets the secondary storage engine pre prepare hook function, if any. More...
std::optional< LEX_CSTRING >	retry_with_secondary_engine (THD *thd)
	Checks if the current query is a candidate for being retried in the secondary engine. More...

Function Documentation

accumulate_statement_cost()

void anonymous_namespace{sql_select.cc}::accumulate_statement_cost

(

const LEX *

lex

)

Calculates the cost of executing a statement, including all its subqueries and stores it in thd->m_current_query_cost.

Parameters

lex	the statement

has_secondary_engine_defined()

bool anonymous_namespace{sql_select.cc}::has_secondary_engine_defined	(	const LEX *	lex,
		const Table_ref **	tref
	)

retry_with_secondary_engine()

std::optional< LEX_CSTRING > anonymous_namespace{sql_select.cc}::retry_with_secondary_engine

(

THD *

thd

)

Checks if the current query is a candidate for being retried in the secondary engine.

Parameters

thd	The current session.

Returns

The name of the secondary engine in which the current query can be retried, or an empty value if it should not be retried.

SecondaryEngineCallPrePrepareHook()

bool anonymous_namespace{sql_select.cc}::SecondaryEngineCallPrePrepareHook	(	THD *	thd,
		const LEX_CSTRING &	secondary_engine
	)

Gets the secondary storage engine pre prepare hook function, if any.

If no hook is found, this function returns false. If hook function is found, it returns the return value of the hook. Please refer to secondary_engine_pre_prepare_hook_t definition for description of its return value.