GoogleCloudPlatform/spanner-migration-tool

Validate data written to Spanner

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#19 opened on Jan 27, 2020

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 (1 comment) (0 reactions) (0 assignees)PLpgSQL (81 forks)auto 404
good first issuep4

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Description

After data is written to Spanner, read it back and check it matches the data from the pg_dump.

At a minimum, we could check row counts for each table.

We could also: a) check actual data, but just do this for a sampled set of data, or b) check all data (probably requires another pass over the pg_dump for large datasets).

Contributor guide

Research direction
Investigate the existing write path in the migration tool (likely in Go) and understand how data is written to Spanner from pg dump. Then design a validation step that reads back the written data (row counts and optionally sampled data) and compares it to the original pg dump. Look for existing test infrastructure and examples of similar validations in the codebase.
Tech stack
gopostgresql
Domain
databasecloud
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GoSQL
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65