Item_datetime_literal Class Reference

#include <item_timefunc.h>

Inheritance diagram for Item_datetime_literal:

List of all members.

Public Member Functions
	Item_datetime_literal (MYSQL_TIME *ltime, uint dec_arg)
const char *	func_name () const
void	print (String *str, enum_query_type query_type)
longlong	val_date_temporal ()
bool	get_date (MYSQL_TIME *ltime, uint fuzzy_date)
String *	val_str (String *str)
void	fix_length_and_dec ()
bool	check_partition_func_processor (uchar *int_arg)
bool	basic_const_item () const
bool	const_item () const
table_map	used_tables () const
table_map	not_null_tables () const
void	cleanup ()
bool	eq (const Item *item, bool binary_cmp) const

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Detailed Description

TIMESTAMP'2001-01-01 10:20:30'

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Constructor & Destructor Documentation

Item_datetime_literal::Item_datetime_literal	(	MYSQL_TIME *	ltime,
		uint	dec_arg
	)		[inline]

Constructor for Item_datetime_literal.

Parameters:

ltime	DATETIME value.
dec_arg	number of fractional digits in ltime.

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Member Function Documentation

bool Item_datetime_literal::eq	(	const Item *	item,
		bool	binary_cmp
	)		const [virtual]

This function is called when:

• Comparing items in the WHERE clause (when doing where optimization)
• When trying to find an ORDER BY/GROUP BY item in the SELECT part
• When matching fields in multiple equality objects (Item_equal)

Reimplemented from Item_func.

void Item_datetime_literal::print	(	String *	str,
		enum_query_type	query_type
	)		[virtual]

This method is used for to:

• to generate a view definition query (SELECT-statement);
• to generate a SQL-query for EXPLAIN EXTENDED;
• to generate a SQL-query to be shown in INFORMATION_SCHEMA;
• debug.

For more information about view definition query, INFORMATION_SCHEMA query and why they should be generated from the Item-tree,

See also:

mysql_register_view().

Reimplemented from Item_func.

longlong Item_datetime_literal::val_date_temporal

(

)

[inline, virtual]

Return date value of item in packed longlong format.

Reimplemented from Item_datetime_func.

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

• item_timefunc.h
• item_timefunc.cc