Item_num Class Reference

Inheritance diagram for Item_num:

List of all members.

Public Member Functions
virtual Item_num *	neg ()=0
Item *	safe_charset_converter (const CHARSET_INFO *tocs)
bool	check_partition_func_processor (uchar *int_arg)

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Member Function Documentation

Item * Item_num::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.

Reimplemented in Item_static_float_func.

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

• item.h
• item.cc