[BEAM-3973] Allow to disable batch API in SpannerIO

• Type: Bug
• Status: Resolved
• Priority: P0
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.5.0
• Component/s: io-java-gcp
• Assignee: Mairbek Khadikov
• Reporter: Mairbek Khadikov
• Created: 29/Mar/18 22:00
• Updated: 16/May/20 14:21
• Resolved: 17/May/18 21:21

Description

In 2.4.0, SpannerIO#read has been migrated to use batch API. The batch API provides abstractions to scale out reads from Spanner, but it requires the query to be root-partitionable. The root-partitionable queries cover majority of the use cases, however there are examples when running arbitrary query is useful. For example, reading all the table names from the information_schema.* and reading the content of those tables in the next step. 

Issue Links

• links to: GitHub Pull Request #4946