Argument for walk method replace_scalar_subquery. More...

#include <item_subselect.h>

Public Member Functions
	Scalar_subquery_replacement (Item_singlerow_subselect target, TABLE derived, Field field, Query_block select, bool add_coalesce, bool add_having_compensation, uint having_idx)

Public Attributes
Item_singlerow_subselect *	m_target
	< subquery to be replaced with ␓field from derived table More...

TABLE *	m_derived
	the replacement field More...

Field *	m_field
	The transformed query block. More...

Query_block *	m_outer_query_block
	The immediately surrounding query block. More...

Query_block *	m_inner_query_block
	True if subquery's selected item contains a COUNT aggregate. More...

bool	m_add_coalesce {false}
	Presence of HAVING clause in subquery: Only relevant if `m_add_coalesce` is true. More...

bool	m_add_having_compensation {false}
	Index of field holding value of having clause in derived table's list of fields. More...

uint	m_having_idx {0}

Detailed Description

Argument for walk method replace_scalar_subquery.

Constructor & Destructor Documentation

◆ Scalar_subquery_replacement()

Item_singlerow_subselect::Scalar_subquery_replacement::Scalar_subquery_replacement	(	Item_singlerow_subselect *	target,
		TABLE *	derived,
		Field *	field,
		Query_block *	select,
		bool	add_coalesce,
		bool	add_having_compensation,
		uint	having_idx
	)

inline

Member Data Documentation

◆ m_add_coalesce

bool Item_singlerow_subselect::Scalar_subquery_replacement::m_add_coalesce {false}

Presence of HAVING clause in subquery: Only relevant if m_add_coalesce is true.

◆ m_add_having_compensation

bool Item_singlerow_subselect::Scalar_subquery_replacement::m_add_having_compensation {false}

Index of field holding value of having clause in derived table's list of fields.

Only relevant if m_add_coalesce is true

◆ m_derived

TABLE* Item_singlerow_subselect::Scalar_subquery_replacement::m_derived

the replacement field

◆ m_field

Field* Item_singlerow_subselect::Scalar_subquery_replacement::m_field

The transformed query block.

◆ m_having_idx

uint Item_singlerow_subselect::Scalar_subquery_replacement::m_having_idx {0}

◆ m_inner_query_block

Query_block* Item_singlerow_subselect::Scalar_subquery_replacement::m_inner_query_block

True if subquery's selected item contains a COUNT aggregate.

◆ m_outer_query_block

Query_block* Item_singlerow_subselect::Scalar_subquery_replacement::m_outer_query_block

The immediately surrounding query block.

This will be the transformed block or a subquery of it

◆ m_target

Item_singlerow_subselect* Item_singlerow_subselect::Scalar_subquery_replacement::m_target

< subquery to be replaced with ␓field from derived table

The derived table of the transform

The documentation for this struct was generated from the following file:

sql/item_subselect.h

Public Member Functions

Public Attributes