MysqlSqlUtil::MysqlColumn Class Reference

represents a MySQL-specific column More...

Inheritance diagram for MysqlSqlUtil::MysqlColumn:

Public Member Methods
softlist	getAddColumnSql (AbstractTable t)
	returns a list of sql strings that can be used to add the column to an existing table More...
string	getCreateSql (AbstractTable t)
	returns an sql string that can be used to add the column to a table
string	getDdlName (string name)
	returns the column name with quoting in case the column name is a reserved word More...
softlist	getModifySqlImpl (AbstractTable t, AbstractColumn col, *hash opt)
	returns a list of sql strings that can be used to modify the column to the new definition; if the column definitions are identical then an empty list is returned More...
string	getRenameSql (AbstractTable t, string new_name)
	returns a string that can be used to rename the column More...

Public Attributes
int	byte_size
	byte size of the column

Private Member Methods
	constructor ()
	empty constructor for subclasses
bool	equalImpl (AbstractColumn c)
	returns True if the argument is equal to the current object, False if not

Detailed Description

represents a MySQL-specific column

Member Function Documentation

getAddColumnSql()

softlist MysqlSqlUtil::MysqlColumn::getAddColumnSql

(

AbstractTable

t

)

returns a list of sql strings that can be used to add the column to an existing table

Example:

list l = col.getAddColumnSql(t);

Parameters

t	the AbstractTable object to modify

getDdlName()

string MysqlSqlUtil::MysqlColumn::getDdlName ( string  name )

virtual

returns the column name with quoting in case the column name is a reserved word

the name returned here will be used when executing DDL

Implements SqlUtil::AbstractDdlObject.

getModifySqlImpl()

softlist MysqlSqlUtil::MysqlColumn::getModifySqlImpl	(	AbstractTable	t,
		AbstractColumn	col,
		*hash	opt
	)

returns a list of sql strings that can be used to modify the column to the new definition; if the column definitions are identical then an empty list is returned

Example:

list l = col.getModifySql(t, newcol);

The column names are assumed to be equal.

Parameters

t	the AbstractTable object to modify
col	the new column definition
opt	column modification options (none are supported in this class)

Returns

a list of sql strings that can be used to modify the column to the new definition; if the column definitions are identical then an empty list is returned

getRenameSql()

string MysqlSqlUtil::MysqlColumn::getRenameSql	(	AbstractTable	t,
		string	new_name
	)

returns a string that can be used to rename the column

Example:

string str = col.getRenameSql(t, "new_name");

Parameters

t	the AbstractTable object to modify
new_name	the new name for the column

Returns

a string that can be used to rename the column