Struct parquet::file::metadata::ColumnChunkMetaData

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pub struct ColumnChunkMetaData { /* private fields */ }
Expand description

Metadata for a column chunk.

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impl ColumnChunkMetaData

Represents common operations for a column chunk.

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pub fn builder(column_descr: ColumnDescPtr) -> ColumnChunkMetaDataBuilder

Returns builder for column chunk metadata.

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pub fn file_path(&self) -> Option<&str>

File where the column chunk is stored.

If not set, assumed to belong to the same file as the metadata. This path is relative to the current file.

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pub fn file_offset(&self) -> i64

Byte offset in file_path().

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pub fn column_type(&self) -> Type

Type of this column. Must be primitive.

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pub fn column_path(&self) -> &ColumnPath

Path (or identifier) of this column.

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pub fn column_descr(&self) -> &ColumnDescriptor

Descriptor for this column.

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pub fn column_descr_ptr(&self) -> ColumnDescPtr

Reference counted clone of descriptor for this column.

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pub fn encodings(&self) -> &Vec<Encoding>

All encodings used for this column.

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pub fn num_values(&self) -> i64

Total number of values in this column chunk.

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pub fn compression(&self) -> Compression

Compression for this column.

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pub fn compressed_size(&self) -> i64

Returns the total compressed data size of this column chunk.

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pub fn uncompressed_size(&self) -> i64

Returns the total uncompressed data size of this column chunk.

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pub fn data_page_offset(&self) -> i64

Returns the offset for the column data.

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pub fn index_page_offset(&self) -> Option<i64>

Returns the offset for the index page.

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pub fn dictionary_page_offset(&self) -> Option<i64>

Returns the offset for the dictionary page, if any.

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pub fn byte_range(&self) -> (u64, u64)

Returns the offset and length in bytes of the column chunk within the file

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pub fn statistics(&self) -> Option<&Statistics>

Returns statistics that are set for this column chunk, or None if no statistics are available.

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pub fn page_encoding_stats(&self) -> Option<&Vec<PageEncodingStats>>

Returns the offset for the page encoding stats, or None if no page encoding stats are available.

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pub fn bloom_filter_offset(&self) -> Option<i64>

Returns the offset for the bloom filter.

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pub fn bloom_filter_length(&self) -> Option<i32>

Returns the offset for the bloom filter.

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pub fn column_index_offset(&self) -> Option<i64>

Returns the offset for the column index.

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pub fn column_index_length(&self) -> Option<i32>

Returns the offset for the column index length.

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pub fn offset_index_offset(&self) -> Option<i64>

Returns the offset for the offset index.

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pub fn offset_index_length(&self) -> Option<i32>

Returns the offset for the offset index length.

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pub fn from_thrift(column_descr: ColumnDescPtr, cc: ColumnChunk) -> Result<Self>

Method to convert from Thrift.

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pub fn to_thrift(&self) -> ColumnChunk

Method to convert to Thrift.

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pub fn to_column_metadata_thrift(&self) -> ColumnMetaData

Method to convert to Thrift ColumnMetaData

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pub fn into_builder(self) -> ColumnChunkMetaDataBuilder

Trait Implementations§

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impl Clone for ColumnChunkMetaData

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fn clone(&self) -> ColumnChunkMetaData

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ColumnChunkMetaData

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for ColumnChunkMetaData

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fn eq(&self, other: &ColumnChunkMetaData) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for ColumnChunkMetaData

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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Calls U::from(self).

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type Error = Infallible

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Performs the conversion.
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where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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Performs the conversion.
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