# Working with Columns

## addColumn(*$table*, *$column*, *$attributes*)

Add to the work queue instruction needed to add a column, named *$column*, with specified *$attributes* to *$table*.

The attributes as specified as a string, i.e. "VARCHAR(32) NOT NULL DEFAULT ''".

Returns *true* on success, or *false* on error. Additional information may be available using getLastError() and getLastErrNo().

## alterColumn(*$table*, *$column*, *$attributes*, *$newName*)

Add to the work queue instruction needed to alter an existing column, named *$column*, on *$table* with specified *$attributes*. If *$newName* is supplied, the column will be renamed as specified in *$newName*.

The attributes as specified as a string, i.e. "VARCHAR(32) NOT NULL DEFAULT ''".

Returns *true* on success, or *false* on error. Additional information may be available using getLastError() and getLastErrNo().

## getColumnAttributes(*$table*, *$column*)

Get the current attributes an existing column, named *$column*, on *$table*.

Returns an attribute string on success, or *false* on error. Additional information may be available using getLastError() and getLastErrNo().

## dropColumn(*$table*, *$column*)

Add to the work queue instruction needed to drop an existing column, named *$column*, on *$table*.

Returns *true* on success, or *false* on error. Additional information may be available using getLastError() and getLastErrNo().


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