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https://issues.apache.org/jira/browse/SPARK-57744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-57744:
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Labels: pull-request-available (was: )
> Types Framework - migrate vectorized column population
> (ColumnVectorUtils.appendValue and Columnar row getters)
> ---------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-57744
> URL: https://issues.apache.org/jira/browse/SPARK-57744
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.3.0
> Reporter: Max Gekk
> Priority: Major
> Labels: pull-request-available
>
> h2. What
> Migrate the vectorized-reader column-population code paths to dispatch
> through the Types Framework (TypeOps / PhysicalDataType) instead of
> hand-rolled per-type {{instanceof}} chains, so any framework-registered type
> (TimeType today, future types tomorrow) is handled without per-type edits.
> h2. Where
> * {{sql/core .../execution/vectorized/ColumnVectorUtils.java}} --
> {{appendValue(WritableColumnVector, DataType, Object)}} (the {{toBatch}}
> path): route the external -> internal conversion through
> {{TypeOps.toCatalyst}} and append according to {{getPhysicalType}}, replacing
> the tail of the explicit {{instanceof}} chain.
> * {{sql/catalyst .../vectorized/ColumnarRow.java}} and
> {{ColumnarBatchRow.java}} -- {{get(int, DataType)}}: delegate to
> {{SpecializedGettersReader.read(...)}} (which dispatches on
> {{PhysicalDataType}}), mirroring {{ColumnarArray.get}}, which already does
> this.
> h2. Why
> The populate path and the {{copy()}} methods already dispatch on
> {{PhysicalDataType}} and therefore support framework types for free, and
> {{ColumnarArray.get}} already delegates to {{SpecializedGettersReader}}.
> {{appendValue}} and the two row getters are the only remaining
> hand-maintained {{instanceof}} chains in this layer. Bringing them onto the
> framework removes duplicated dispatch and means new framework types need no
> edits here.
> h2. Relationship
> * Parent: SPARK-53504 (Types Framework umbrella).
> * Related: SPARK-56076 (Phase 1b - Generic Row Access) overlaps with the
> {{get(int, DataType)}} delegation.
> * Follows: SPARK-57570, which added an explicit TimeType case to
> {{appendValue}} as a focused fix; this task generalizes that case through the
> framework.
> h2. Acceptance criteria
> * {{appendValue}} and the columnar row getters no longer special-case
> individual framework types; TIME (and other framework types) flow through
> automatically via {{PhysicalDataType}} / {{TypeOps}}.
> * Behavior preserved for existing types. Call out in review: delegating the
> getters changes the unsupported-type error code ({{_LEGACY_ERROR_TEMP_3152}}
> / {{_LEGACY_ERROR_TEMP_3155}} -> {{_LEGACY_ERROR_TEMP_3131}}), and
> {{ColumnarRow.get}} gains {{CalendarIntervalType}} support it currently lacks.
> * {{ColumnVectorUtilsSuite}} / {{ColumnarBatchSuite}} continue to pass; the
> per-precision TIME {{testVector}} in {{ColumnarBatchSuite}} can then assert
> via {{batchRow.get(0, dt)}}.
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