Module writer

Contains column writer API.

Modules

• encoder 🔒

Macros

• downcast_writer 🔒

Structs

• ColumnCloseResult
  Metadata returned by GenericColumnWriter::close
• ColumnMetrics 🔒
• GenericColumnWriter
  Generic column writer for a primitive column.
• PageMetrics 🔒

Enums

• ColumnWriter
  Column writer for a Parquet type.
• LevelDeprecated

Functions

• compare_greater 🔒
  Evaluate a > b according to underlying logical type.
• compare_greater_byte_array_decimals 🔒
  Signed comparison of bytes arrays
• fallback_encoding 🔒
  Returns encoding for a column when no other encoding is provided in writer properties.
• get_column_writer
  Gets 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.