[
https://issues.apache.org/jira/browse/SPARK-59342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Johan Lasperas updated SPARK-59342:
-----------------------------------
Description:
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}
was:
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:
```
public interface Table {
...
default SchemaAlignmentConfig schemaAlignmentConfig() {
return SchemaAlignmentConfig.DEFAULT;
}
}
public interface SchemaAlignmentConfig {
default boolean allowLegacyStoreAssignmentPolicy() {
return false;
}
default boolean deferCastValidationToRuntime() {
return false;
}
}
```
> 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
>
> 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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