Item_static_float_func Class Reference

Inheritance diagram for Item_static_float_func:

List of all members.

Public Member Functions
	Item_static_float_func (const Name_string &name_arg, double val_arg, uint decimal_par, uint length)
virtual void	print (String *str, enum_query_type query_type)
Item *	safe_charset_converter (const CHARSET_INFO *tocs)

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Member Function Documentation

virtual void Item_static_float_func::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_float.

Item * Item_static_float_func::safe_charset_converter

(

const CHARSET_INFO *

tocs

)

[virtual]

Created mostly for mysql_prepare_table(). Important when a string ENUM/SET column is described with a numeric default value:

CREATE TABLE t1(a SET('a') DEFAULT 1);

We cannot use generic Item::safe_charset_converter(), because the latter returns a non-fixed Item, so val_str() crashes afterwards. Override Item_num method, to return a fixed item.

Reimplemented from Item_num.

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

• item.h
• item.cc