parquet::column

Module writer

Source
Expand description

Contains column writer API.

Modules§

Macros§

Structs§

Enums§

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 🔒
    Try and increment the the string’s bytes from right to left, returning when the result is a valid UTF8 string. Returns None when it can’t increment any byte.
  • is_nan 🔒
  • truncate_utf8 🔒
    Truncate a UTF8 slice to the longest prefix that is still a valid UTF8 string, while being less than length bytes and non-empty
  • update_max 🔒
  • update_min 🔒
  • update_stat 🔒
    Perform a conditional update of cur, skipping any NaN values

Type Aliases§