Item_num_op Class Reference

Inheritance diagram for Item_num_op:

List of all members.

Public Member Functions
	Item_num_op (Item *a, Item *b)
virtual void	result_precision ()=0
virtual void	print (String *str, enum_query_type query_type)
void	find_num_type ()
String *	str_op (String *str)
	Performs the operation that this functions implements when the result type is a string type.
bool	date_op (MYSQL_TIME *ltime, uint fuzzydate)
	Performs the operation that this functions implements when the result type is MYSQL_TYPE_DATE or MYSQL_TYPE_DATETIME.
bool	time_op (MYSQL_TIME *ltime)

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Member Function Documentation

bool Item_num_op::date_op	(	MYSQL_TIME *	ltime,
		uint	fuzzydate
	)		[inline, virtual]

Performs the operation that this functions implements when the result type is MYSQL_TYPE_DATE or MYSQL_TYPE_DATETIME.

Returns:

The result of the operation.

Implements Item_func_numhybrid.

void Item_num_op::find_num_type

(

void

)

[virtual]

Check arguments here to determine result's type for a numeric function of two arguments.

Implements Item_func_numhybrid.

virtual void Item_num_op::print	(	String *	str,
		enum_query_type	query_type
	)		[inline, 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.

String* Item_num_op::str_op

(

String *

)

[inline, virtual]

Performs the operation that this functions implements when the result type is a string type.

Returns:

The result of the operation.

Implements Item_func_numhybrid.

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

• item_func.h
• item_func.cc