3.2.1.0 table.addcols

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table.addcols - Function

3.2.1 !!!REQUIRES COLUMN DESCRIPTION FUNCTIONS THAT HAVE NOT BEEN IMPLEMENTED!!! add one or more columns
Description

Columns can be added to a table that was opened nomodify=False. The new columns will be filled with a default value (0 or blank).

!!!THESE COLUMN DESCRIPTION FUNCTIONS HAVE NOT BEEN IMPLEMENTED!!!
For each column to be added a column description has to be setup using function tablecreatescalarcoldesc or tablecreatearraycoldesc. When multiple columns are used, they have to be combined in a single record using tablecreatedesc.
It is possible to specify data manager info in order to define a data manager (storage manager or virtual column engine) for the columns to be added.

Arguments


Inputs
desc	Description of one or more columns
	allowed:	any
	Default:	record
dminfo	Optional description data manager to use
	allowed:	any
	Default:	record

Returns
bool

Example

!!!REQUIRES COLUMN DESCRIPTION FUNCTIONS THAT HAVE NOT BEEN IMPLEMENTED!!!
  tb.open("mytable", nomodify=False)
  dc3=tablecreatescalarcoldesc(’C3’, ’a’)
  dc4=tablecreatescalarcoldesc(’C4’, as_float(0))
  dc5=tablecreatearraycoldesc(’C5’, as_double(0), 2, [10,20])
  tb.addcols(dc3)
# True
  tb.addcols(tablecreatedesc(dc4, dc5))
# True

A single column can be added as such, but multiple columns have to be combined.

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