Struct parquet_format_async_temp::DataPageHeaderV2[][src]

pub struct DataPageHeaderV2 {
    pub num_values: i32,
    pub num_nulls: i32,
    pub num_rows: i32,
    pub encoding: Encoding,
    pub definition_levels_byte_length: i32,
    pub repetition_levels_byte_length: i32,
    pub is_compressed: Option<bool>,
    pub statistics: Option<Statistics>,
}
Expand description

New page format allowing reading levels without decompressing the data Repetition and definition levels are uncompressed The remaining section containing the data is compressed if is_compressed is true

Fields

num_values: i32

Number of values, including NULLs, in this data page. *

num_nulls: i32

Number of NULL values, in this data page. Number of non-null = num_values - num_nulls which is also the number of values in the data section *

num_rows: i32

Number of rows in this data page. which means pages change on record boundaries (r = 0) *

encoding: Encoding

Encoding used for data in this page *

definition_levels_byte_length: i32

length of the definition levels

repetition_levels_byte_length: i32

length of the repetition levels

is_compressed: Option<bool>

whether the values are compressed. Which means the section of the page between definition_levels_byte_length + repetition_levels_byte_length + 1 and compressed_page_size (included) is compressed with the compression_codec. If missing it is considered compressed

statistics: Option<Statistics>

optional statistics for the data in this page *

Implementations

Trait Implementations

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