Module writer 

Contains column writer API.

Modules

encoder 🔒

Macros

downcast_writer 🔒

Structs

ColumnCloseResult

Metadata for a column chunk of a Parquet file.

ColumnMetrics 🔒

GenericColumnWriter

Generic column writer for a primitive Parquet column

PageMetrics 🔒

Enums

ColumnWriter

Column writer for a Parquet type.

Functions

compare_greater 🔒

Evaluate a > b according to underlying logical type.

compare_greater_byte_array_decimals 🔒

Signed comparison of bytes arrays

compare_greater_f16 🔒

compare_greater_unsigned_int 🔒

fallback_encoding 🔒

Returns encoding for a column when no other encoding is provided in writer properties.

get_column_writer

Create a specific column writer corresponding to column descriptor descr.

get_typed_column_writer

Gets a typed column writer for the specific type T, by “up-casting” col_writer of non-generic type to a generic column writer type ColumnWriterImpl.

get_typed_column_writer_mut

Similar to get_typed_column_writer but returns a reference.

get_typed_column_writer_ref

Similar to get_typed_column_writer but returns a reference.

has_dictionary_support 🔒

Returns true if dictionary is supported for column writer, false otherwise.

increment 🔒

Try and increment the bytes from right to left.

increment_utf8 🔒

Increment the final character in a UTF-8 string in such a way that the returned result is still a valid UTF-8 string. The returned string may be shorter than the input if the last character(s) cannot be incremented (due to overflow or producing invalid code points). Returns None if the string cannot be incremented.

is_nan 🔒

truncate_and_increment_utf8 🔒

Truncate a UTF-8 slice and increment it’s final character. The returned value is the longest such slice that is still a valid UTF-8 string while being less than length bytes and non-empty. Returns None if no such transformation is possible.

truncate_utf8 🔒

Truncate a UTF-8 slice to the longest prefix that is still a valid UTF-8 string, while being less than length bytes and non-empty. Returns None if truncation is not possible within those constraints.

update_max 🔒

update_min 🔒

update_stat 🔒

Perform a conditional update of cur, skipping any NaN values

Type Aliases

ColumnWriterImpl

Typed column writer for a primitive column.