PT_border Class Reference

Parse tree node for a single of a window extent's borders, cf. More...

#include <parse_tree_nodes.h>

Inheritance diagram for PT_border:

Public Member Functions
	PT_border (enum_window_border_type type)
	For bounded non-temporal border, e.g. 2 PRECEDING: 'value' is 2. More...
	PT_border (enum_window_border_type type, Item *value)
	For bounded INTERVAL 2 DAYS, 'value' is 2, int_type is DAYS. More...
	PT_border (enum_window_border_type type, Item *value, interval_type int_type)
Item *	border () const
Item **	border_ptr ()
	Need such low-level access so that fix_fields updates the right pointer. More...
Item *	build_addop (Item_cache *order_expr, bool prec, bool asc, const Window *window)
Public Member Functions inherited from Parse_tree_node_tmpl< Context >
virtual	~Parse_tree_node_tmpl ()=default
bool	is_contextualized () const
virtual bool	contextualize (Context *pc)
	Do all context-sensitive things and mark the node as contextualized. More...
void	error (Context *pc, const POS &pos) const
	syntax_error() function replacement for deferred reporting of syntax errors More...
void	error (Context *pc, const POS &pos, const char *msg) const
	syntax_error() function replacement for deferred reporting of syntax errors More...
void	errorf (Context *pc, const POS &pos, const char *format,...) const
	syntax_error() function replacement for deferred reporting of syntax errors More...

Public Attributes
enum_window_border_type	m_border_type
const bool	m_date_time
interval_type	m_int_type
	For unbounded border. More...

Private Attributes
Item *	m_value {nullptr}
	only relevant iff m_border_type == WBT_VALUE_* More...

Friends
class	Window

Additional Inherited Members
Public Types inherited from Parse_tree_node_tmpl< Context >
typedef Context	context_t
Static Public Member Functions inherited from Parse_tree_node_tmpl< Context >
static void *	operator new (size_t size, MEM_ROOT *mem_root, const std::nothrow_t &arg=std::nothrow) noexcept
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void *, MEM_ROOT *, const std::nothrow_t &) noexcept
Protected Member Functions inherited from Parse_tree_node_tmpl< Context >
	Parse_tree_node_tmpl ()

Detailed Description

Parse tree node for a single of a window extent's borders, cf.

<window frame extent> in SQL 2003.

Constructor & Destructor Documentation

PT_border() [1/3]

PT_border::PT_border ( enum_window_border_type  type )

inline

For bounded non-temporal border, e.g. 2 PRECEDING: 'value' is 2.

PT_border() [2/3]

PT_border::PT_border ( enum_window_border_type  type, Item *  value  )

inline

For bounded INTERVAL 2 DAYS, 'value' is 2, int_type is DAYS.

PT_border() [3/3]

PT_border::PT_border ( enum_window_border_type  type, Item *  value, interval_type  int_type  )

inline

Returns

the '2' in '2 PRECEDING' or 'INTERVAL 2 DAYS PRECEDING'

Member Function Documentation

border()

Item * PT_border::border ( ) const

inline

border_ptr()

Item ** PT_border::border_ptr ( )

inline

Need such low-level access so that fix_fields updates the right pointer.

build_addop()

Item * PT_border::build_addop	(	Item_cache *	order_expr,
		bool	prec,
		bool	asc,
		const Window *	window
	)

Returns

Addition operator for computation of frames, nullptr if error.

Parameters

order_expr	Expression to add to/subtract from
prec	true if PRECEDING
asc	true if ASC
window	only used for error generation

Friends And Related Function Documentation

Window

friend class Window

friend

Member Data Documentation

m_border_type

enum_window_border_type PT_border::m_border_type

m_date_time

const bool PT_border::m_date_time

m_int_type

interval_type PT_border::m_int_type

For unbounded border.

m_value

Item* PT_border::m_value {nullptr}

private

only relevant iff m_border_type == WBT_VALUE_*

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

• sql/parse_tree_nodes.h
• sql/parse_tree_nodes.cc