feat: changed to use transaction instead of managing sessions manually. And only when a transaction is needed #14
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Description of change
Stop opening sessions manually. Based on the spanner code, this should not be done.
https://github.com/googleapis/nodejs-spanner/blob/65f6a838be9f526cb2c1497c66345ef2949e35d4/src/session.ts#L77
Use
database.getTransaction
instead and only when a transaction is needed.We want to do this as we have realised that we are constantly creating and deleting sessions in spanner
We hope that this will improve the performance.