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https://issues.apache.org/jira/browse/SPARK-59342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-59342:
-----------------------------------
Labels: pull-request-available (was: )
> Allow configuring schema alignment behavior for DSv2 writes
> -----------------------------------------------------------
>
> Key: SPARK-59342
> URL: https://issues.apache.org/jira/browse/SPARK-59342
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.3.0
> Reporter: Johan Lasperas
> Priority: Major
> Labels: pull-request-available
>
> Delta is migrating to DSv2, and historically has always allowed:
> * writes under spark.sql.storeAssignmentPolicy=LEGACY
> * Many implicit casts at analysis, relying instead on execution time checks
> to catch malformed values or overflows.
> Without a way to configure this. behavior, this effectively blocks migrating
> Delta to DSv2.
>
> The proposal is to extend the DSv2 interface to allow configuring this
> behavior per table:
>
> {code:java}
> public interface Table {
> ...
> default SchemaAlignmentConfig schemaAlignmentConfig() {
> return SchemaAlignmentConfig.DEFAULT; }
> }
> public interface SchemaAlignmentConfig {
> default boolean allowLegacyStoreAssignmentPolicy() {
> return false;
> }
> default boolean deferCastValidationToRuntime() {
> return false;
> }
> }
> {code}
>
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