Question

In SQLite database how does one define a column default to be the current user?

Answer 1

Are you talking about the default value for the column? The only valid default values for SQLite are as follows:

The DEFAULT constraint specifies a default value to use when doing an INSERT. The value may be NULL, a string constant or a number. The default value may also be one of the special case-independant keywords CURRENT_TIME, CURRENT_DATE or CURRENT_TIMESTAMP.