Module datafusion_common::utils

This module provides the bisect function, which implements binary search.

Modules

• datafusion_strsim
  Adopted from strsim-rs for string similarity metrics

Traits

• DataPtr
  An extension trait for smart pointers. Provides an interface to get a raw pointer to the data (with metadata stripped away).

Functions

• bisect
  This function searches for a tuple of given values (target) among the given rows (item_columns) using the bisection algorithm. It assumes that item_columns is sorted according to sort_options and returns the insertion index of target. Template argument SIDE being true/false means left/right insertion.
• compare_rows
  This function compares two tuples depending on the given sort options.
• evaluate_partition_ranges
  Given a list of 0 or more already sorted columns, finds the partition ranges that would partition equally across columns.
• find_bisect_point
  This function searches for a tuple of given values (target) among a slice of the given rows (item_columns) using the bisection algorithm. The slice starts at the index low and ends at the index high. The boolean-valued function compare_fn specifies whether we bisect on the left (by returning false), or on the right (by returning true) when we compare the target value with the current value as we iteratively bisect the input.
• get_arrayref_at_indices
  Construct a new Vec of ArrayRef from the rows of the arrays at the indices.
• get_at_indices
  This function “takes” the elements at indices from the slice items.
• get_record_batch_at_indices
  Construct a new RecordBatch from the rows of the record_batch at the indices.
• get_row_at_idx
  Given column vectors, returns row at idx.
• linear_search
  This function searches for a tuple of given values (target) among the given rows (item_columns) via a linear scan. It assumes that item_columns is sorted according to sort_options and returns the insertion index of target. Template argument SIDE being true/false means left/right insertion.
• longest_consecutive_prefix
  This function finds the longest prefix of the form 0, 1, 2, … within the collection sequence. Examples:
• project_schema
  Applies an optional projection to a [SchemaRef], returning the projected schema
• quote_identifier
  Wraps identifier string in double quotes, escaping any double quotes in the identifier by replacing it with two double quotes
• search_in_slice
  This function searches for a tuple of given values (target) among a slice of the given rows (item_columns) via a linear scan. The slice starts at the index low and ends at the index high. The boolean-valued function compare_fn specifies the stopping criterion.