Struct parquet::format::ColumnMetaData

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pub struct ColumnMetaData {
Show 15 fields pub type_: Type, pub encodings: Vec<Encoding>, pub path_in_schema: Vec<String>, pub codec: CompressionCodec, pub num_values: i64, pub total_uncompressed_size: i64, pub total_compressed_size: i64, pub key_value_metadata: Option<Vec<KeyValue>>, pub data_page_offset: i64, pub index_page_offset: Option<i64>, pub dictionary_page_offset: Option<i64>, pub statistics: Option<Statistics>, pub encoding_stats: Option<Vec<PageEncodingStats>>, pub bloom_filter_offset: Option<i64>, pub bloom_filter_length: Option<i32>,
}
Expand description

Description for column metadata

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§type_: Type

Type of this column *

§encodings: Vec<Encoding>

Set of all encodings used for this column. The purpose is to validate whether we can decode those pages. *

§path_in_schema: Vec<String>

Path in schema *

§codec: CompressionCodec

Compression codec *

§num_values: i64

Number of values in this column *

§total_uncompressed_size: i64

total byte size of all uncompressed pages in this column chunk (including the headers) *

§total_compressed_size: i64

total byte size of all compressed, and potentially encrypted, pages in this column chunk (including the headers) *

§key_value_metadata: Option<Vec<KeyValue>>

Optional key/value metadata *

§data_page_offset: i64

Byte offset from beginning of file to first data page *

§index_page_offset: Option<i64>

Byte offset from beginning of file to root index page *

§dictionary_page_offset: Option<i64>

Byte offset from the beginning of file to first (only) dictionary page *

§statistics: Option<Statistics>

optional statistics for this column chunk

§encoding_stats: Option<Vec<PageEncodingStats>>

Set of all encodings used for pages in this column chunk. This information can be used to determine if all data pages are dictionary encoded for example *

§bloom_filter_offset: Option<i64>

Byte offset from beginning of file to Bloom filter data. *

§bloom_filter_length: Option<i32>

Size of Bloom filter data including the serialized header, in bytes. Added in 2.10 so readers may not read this field from old files and it can be obtained after the BloomFilterHeader has been deserialized. Writers should write this field so readers can read the bloom filter in a single I/O.

Implementations§

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impl ColumnMetaData

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pub fn new<F8, F10, F11, F12, F13, F14, F15>( type_: Type, encodings: Vec<Encoding>, path_in_schema: Vec<String>, codec: CompressionCodec, num_values: i64, total_uncompressed_size: i64, total_compressed_size: i64, key_value_metadata: F8, data_page_offset: i64, index_page_offset: F10, dictionary_page_offset: F11, statistics: F12, encoding_stats: F13, bloom_filter_offset: F14, bloom_filter_length: F15, ) -> ColumnMetaData
where F8: Into<Option<Vec<KeyValue>>>, F10: Into<Option<i64>>, F11: Into<Option<i64>>, F12: Into<Option<Statistics>>, F13: Into<Option<Vec<PageEncodingStats>>>, F14: Into<Option<i64>>, F15: Into<Option<i32>>,

Trait Implementations§

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impl Clone for ColumnMetaData

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fn clone(&self) -> ColumnMetaData

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 ColumnMetaData

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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 Hash for ColumnMetaData

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for ColumnMetaData

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fn cmp(&self, other: &ColumnMetaData) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for ColumnMetaData

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fn eq(&self, other: &ColumnMetaData) -> 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 PartialOrd for ColumnMetaData

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fn partial_cmp(&self, other: &ColumnMetaData) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl TSerializable for ColumnMetaData

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impl Eq for ColumnMetaData

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impl StructuralPartialEq for ColumnMetaData

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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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Immutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
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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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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

The type returned in the event of a conversion error.
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Performs the conversion.
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