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Support Field ID in ArrowWriter (#4702) #4710

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merged 1 commit into from
Aug 17, 2023
Merged

Support Field ID in ArrowWriter (#4702) #4710

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7 changes: 7 additions & 0 deletions parquet/src/arrow/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,13 @@ pub use self::schema::{
/// Schema metadata key used to store serialized Arrow IPC schema
pub const ARROW_SCHEMA_META_KEY: &str = "ARROW:schema";

/// The value of this metadata key, if present on [`Field::metadata`], will be used
/// to populate [`BasicTypeInfo::id`]
///
/// [`Field::metadata`]: arrow_schema::Field::metadata
/// [`BasicTypeInfo::id`]: crate::schema::types::BasicTypeInfo::id
pub const PARQUET_FIELD_ID_META_KEY: &str = "PARQUET:field_id";

/// A [`ProjectionMask`] identifies a set of columns within a potentially nested schema to project
///
/// In particular, a [`ProjectionMask`] can be constructed from a list of leaf column indices
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