writeDisposition property

String? writeDisposition
getter/setter pair

Determines whether the existing table in the destination is to be overwritten or appended to.

If a write_disposition is specified, the force parameter is ignored. Possible string values are:

  • "WRITE_DISPOSITION_UNSPECIFIED" : Default behavior is the same as WRITE_EMPTY.
  • "WRITE_EMPTY" : Only export data if the destination table is empty.
  • "WRITE_TRUNCATE" : Erase all existing data in the destination table before writing the instances.
  • "WRITE_APPEND" : Append data to the destination table.

Implementation

core.String? writeDisposition;