const{Spanner}=require('@google-cloud/spanner');constspanner=newSpanner();constinstance=spanner.instance('my-instance');constdatabase=instance.database('my-database');//-// To create a session manually, don't provide a name.//-constsession=database.session();session.create(function(err){if(err){// Error handling omitted.}// Session created successfully.// `session.id` = The name of the session.});//-// To access a previously-created session, provide a name.//-constsession=database.session('session-name');

session.delete(function(err,apiResponse){if(err){// Error handling omitted.}// Session deleted successfully.});//-//Returns a Promise if the callback is omitted.//-session.delete().then(function(data){constapiResponse=data[0];});

Session.formatName_('my-database','my-session');// 'projects/grape-spaceship-123/instances/my-instance/' +// 'databases/my-database/sessions/my-session'

session.getMetadata(function(err,metadata,apiResponse){});//-//Returns a Promise if the callback is omitted.//-session.getMetadata().then(function(data){constmetadata=data[0];constapiResponse=data[1];});

session.keepAlive(function(err){if(err){// An error occurred while trying to keep this session alive.}});

consttransaction=session.partitionedDml();

constsnapshot=session.snapshot({strong:false});

consttransaction=session.transaction();