FreetdsSqlUtil::FreetdsColumn Class Reference

represents a FreeTDS-specific column More...

Inheritance diagram for FreetdsSqlUtil::FreetdsColumn:

Public Member Methods
	constructor (string n, string nt, *string qt, int sz, bool nul, *string dv, *string cm, softint bs, *int scale)
	creates the column from the supplied arguments
softlist	getAddColumnSql (AbstractTable t)
	returns a list of sql strings that can be used to add the column to an existing table More...
string	getDdlName (string name)
	returns the column name with quoting in case the column name is a reserved word More...
list	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 FreeTDS-specific column

Member Function Documentation

getAddColumnSql()

softlist FreetdsSqlUtil::FreetdsColumn::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 SqlUtil::AbstractTable object to modify

getDdlName()

string FreetdsSqlUtil::FreetdsColumn::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()

list FreetdsSqlUtil::FreetdsColumn::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 SqlUtil::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 FreetdsSqlUtil::FreetdsColumn::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 SqlUtil::AbstractTable object to modify
new_name	the new name for the column

Returns

a string that can be used to rename the column