Environment details

• OS: linux
• Node.js version: v8.12.0
• npm version: 6.4.1
• google-cloud-node version: 2.1.0

Steps to reproduce

1. require google-cloud
2. Create a spanner table in a database with a FLOAT64 data type.
3. try to insert/update with 1.00 or 1 through nodejs.

Use-case: User sends us data to insert as a JSON message, we do not have any knowledge of the table schema, we try to insert the same data as-it-is, so we are facing this error when the user is trying to insert/update the FLOAT64 cloumn with either an integer or value ends with .00 spanner is throwing following error:
Error: 9 FAILED_PRECONDITION: Invalid value for column score in table test1: Expected FLOAT64.

I have gone through the suggestion here: #2307

But our problem is that we have no context of table schema, there is no Spanner API available to check the column types (as of my knowledge), I have created a FR: googleapis/nodejs-spanner#368, but it was closed due to insufficient info.

Please suggest a way to over come this. As you are accepting JSON data please fix this accordingly.

Making sure to follow these steps will guarantee the quickest resolution possible.

Thanks!