Class: Google::Cloud::Bigquery::CopyJob

Inherits:
Job
  • Object
show all
Defined in:
lib/google/cloud/bigquery/copy_job.rb

Overview

CopyJob

A Job subclass representing a copy operation that may be performed on a Table. A CopyJob instance is created when you call Table#copy_job.

Examples:

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.table "my_table"
destination_table = dataset.table "my_destination_table"

copy_job = table.copy_job destination_table

copy_job.wait_until_done!
copy_job.done? #=> true

See Also:

Instance Method Summary collapse

Methods inherited from Job

#cancel, #configuration, #created_at, #done?, #ended_at, #error, #errors, #failed?, #job_id, #labels, #pending?, #project_id, #reload!, #rerun!, #running?, #started_at, #state, #statistics, #status, #user_email, #wait_until_done!

Instance Method Details

#create_if_needed? ⇒ Boolean

Checks if the create disposition for the job is CREATE_IF_NEEDED, which provides the following behavior: If the table does not exist, the copy operation creates the table. This is the default create disposition for copy jobs.

Returns:

  • (Boolean) —

    true when CREATE_IF_NEEDED, false otherwise.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 79

def create_if_needed?
  disp = @gapi.configuration.copy.create_disposition
  disp == "CREATE_IF_NEEDED"
end

#create_never? ⇒ Boolean

Checks if the create disposition for the job is CREATE_NEVER, which provides the following behavior: The table must already exist; if it does not, an error is returned in the job result.

Returns:

  • (Boolean) —

    true when CREATE_NEVER, false otherwise.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 91

def create_never?
  disp = @gapi.configuration.copy.create_disposition
  disp == "CREATE_NEVER"
end

#destination ⇒ Table

The table to which data is copied.

Returns:

  • (Table) —

    A table instance.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 63

def destination
  table = @gapi.configuration.copy.destination_table
  return nil unless table
  retrieve_table table.project_id,
                 table.dataset_id,
                 table.table_id
end

#source ⇒ Table

The table from which data is copied. This is the table on which Table#copy_job was called.

Returns:

  • (Table) —

    A table instance.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 50

def source
  table = @gapi.configuration.copy.source_table
  return nil unless table
  retrieve_table table.project_id,
                 table.dataset_id,
                 table.table_id
end

#write_append? ⇒ Boolean

Checks if the write disposition for the job is WRITE_APPEND, which provides the following behavior: If the table already exists, the copy operation appends the data to the table.

Returns:

  • (Boolean) —

    true when WRITE_APPEND, false otherwise.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 115

def write_append?
  disp = @gapi.configuration.copy.write_disposition
  disp == "WRITE_APPEND"
end

#write_empty? ⇒ Boolean

Checks if the write disposition for the job is WRITE_EMPTY, which provides the following behavior: If the table already exists and contains data, the job will have an error. This is the default write disposition for copy jobs.

Returns:

  • (Boolean) —

    true when WRITE_EMPTY, false otherwise.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 128

def write_empty?
  disp = @gapi.configuration.copy.write_disposition
  disp == "WRITE_EMPTY"
end

#write_truncate? ⇒ Boolean

Checks if the write disposition for the job is WRITE_TRUNCATE, which provides the following behavior: If the table already exists, the copy operation overwrites the table data.

Returns:

  • (Boolean) —

    true when WRITE_TRUNCATE, false otherwise.



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# File 'lib/google/cloud/bigquery/copy_job.rb', line 103

def write_truncate?
  disp = @gapi.configuration.copy.write_disposition
  disp == "WRITE_TRUNCATE"
end