[SPARK-54240] Translate get array item catalyst expression to connector expression #52940
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urosstan-db
commented
Nov 10, 2025
| case _: StringRPad => generateExpressionWithName("RPAD", expr, isPredicate) | ||
| case GetArrayItem(_, _, failOnError) if failOnError => | ||
| // Pushdown only if ANSI is enabled (fail on error) to be compatible with remote systems. | ||
| generateExpressionWithName("GET_ARRAY_ITEM", expr, isPredicate) |
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We can make new v2 expression as well to be able to pass failOnError argument, since get method in spark returns 0-indexed element of array, but it does not fail for index out of bounds, so it would be beneficial to pass failOnError to be able to support get method pushdown beside bracket access. WDYT @srielau @cloud-fan ?
urosstan-db
commented
Nov 10, 2025
| "Failed to encode a value of the expressions: <expressions> to a row." | ||
| ], | ||
| "sqlState" : "42846" | ||
| }, |
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I did not find we have similar non legacy error. Legacy errors are usually too specific, e.g. unsupported function.
cloud-fan
reviewed
Nov 11, 2025
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| public Expression getChildArray() { return this.childArray; } | ||
| public Expression getOrdinal() { return this.ordinal; } | ||
| public boolean getFailOnError() { return this.failOnError; } |
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I don't see the get prefix in other v2 expressions such as Cast. Can we be consistent here?
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Yes, makes sense 😄
cloud-fan
approved these changes
Nov 11, 2025
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What changes were proposed in this pull request?
Why are the changes needed?
Does this PR introduce any user-facing change?
No
How was this patch tested?
No testing needed, since we did not implement pushdowns yet
Was this patch authored or co-authored using generative AI tooling?
No