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https://issues.apache.org/jira/browse/BEAM-3973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479727#comment-16479727
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Mairbek Khadikov commented on BEAM-3973:
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Fixed with [https://github.com/apache/beam/pull/4946]
> Allow to disable batch API in SpannerIO
> ---------------------------------------
>
> Key: BEAM-3973
> URL: https://issues.apache.org/jira/browse/BEAM-3973
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.4.0
> Reporter: Mairbek Khadikov
> Assignee: Mairbek Khadikov
> Priority: Blocker
> Fix For: 2.5.0
>
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> 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.
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