Helper singleton class used to track information needed to perform the transform of a correlated scalar subquery in a derived table, as performed by decorrelate_derived_scalar_subquery_pre and decorrelate_derived_scalar_subquery_pre. More...

Public Member Functions
	Lifted_expressions_map (MEM_ROOT *root)

Public Attributes
List< Item >	m_inner_fields
	< list of fields in WHERE clauses eligible for lifting More...

List< Item >	m_inner_func_calls

Mem_root_array< uint >	m_field_positions

Mem_root_array< uint >	m_func_call_positions
	The list of outer fields of the WHERE clauses eligible. More...

List< Item >	m_outer_fields

Detailed Description

Helper singleton class used to track information needed to perform the transform of a correlated scalar subquery in a derived table, as performed by decorrelate_derived_scalar_subquery_pre and decorrelate_derived_scalar_subquery_pre.

Constructor & Destructor Documentation

◆ Lifted_expressions_map()

Lifted_expressions_map::Lifted_expressions_map ( MEM_ROOT * root )

inlineexplicit

Member Data Documentation

◆ m_field_positions

Mem_root_array<uint> Lifted_expressions_map::m_field_positions

◆ m_func_call_positions

Mem_root_array<uint> Lifted_expressions_map::m_func_call_positions

The list of outer fields of the WHERE clauses eligible.

◆ m_inner_fields

List<Item> Lifted_expressions_map::m_inner_fields

< list of fields in WHERE clauses eligible for lifting

list of expressions that are not simple fields in WHERE clauses eligible for lifting.

◆ m_inner_func_calls

List<Item> Lifted_expressions_map::m_inner_func_calls

◆ m_outer_fields

List<Item> Lifted_expressions_map::m_outer_fields

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

sql/sql_resolver.cc

Public Member Functions

Public Attributes