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feat: add schema evolution to merge statement #3136

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Feb 3, 2025
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feat: add schema evolution to merge statement #3136

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2 changes: 1 addition & 1 deletion crates/core/src/operations/cast/merge_schema.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -292,7 +292,7 @@ pub(crate) fn merge_arrow_field(
/// Merges Arrow Table schema and Arrow Batch Schema, by allowing Large/View Types to passthrough.
// Sometimes fields can't be merged because they are not the same types. So table has int32,
// but batch int64. We want the preserve the table type. At later stage we will call cast_record_batch
// which will cast the batch int64->int32. This is desired behaviour so we can have flexibility
// which will cast the batch int64->int32. This is desired behavior so we can have flexibility
// in the batch data types. But preserve the correct table and parquet types.
//
// Preserve_new_fields can also be disabled if you just want to only use the passthrough functionality
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