Module utils

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

Modules

• datafusion_strsim
  Adopted from strsim-rs for string similarity metrics
• expr
  Expression utilities
• memory
  This module provides a function to estimate the memory size of a HashTable prior to allocation
• proxy
  VecAllocExt and RawTableAllocExt to help tracking of memory allocations
• string_utils
  Utilities for working with strings

Structs

• SingleRowListArrayBuilder
  Creates single element ListArray, LargeListArray and FixedSizeListArray from other arrays

Functions

• array_into_fixed_size_list_arrayDeprecated
• array_into_fixed_size_list_array_with_field_nameDeprecated
• array_into_large_list_arrayDeprecated
  Wrap an array into a single element LargeListArray. For example [1, 2, 3] would be converted into [[1, 2, 3]]
• array_into_large_list_array_with_field_nameDeprecated
• array_into_list_arrayDeprecated
  Wrap an array into a single element ListArray. For example [1, 2, 3] would be converted into [[1, 2, 3]]
• array_into_list_array_nullableDeprecated
  Wrap an array into a single element ListArray. For example [1, 2, 3] would be converted into [[1, 2, 3]] The field in the list array is nullable.
• array_into_list_array_with_field_nameDeprecated
• arrays_into_list_array
  Wrap arrays into a single element ListArray.
• base_type
  Get the base type of a data type.
• 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.
• coerced_fixed_size_list_to_list
  Recursively coerce and FixedSizeList elements to List
• coerced_type_with_base_type_only
  A helper function to coerce base type in List.
• combine_limit
  Computes the skip and fetch parameters of a single limit that would be equivalent to two consecutive limits with the given skip/fetch parameters.
• 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.
• find_indices
  Find indices of each element in targets inside items. If one of the elements is absent in items, returns an error.
• fixed_size_list_to_arrays
  Helper function to convert a FixedSizeListArray into a vector of ArrayRefs.
• get_at_indices
  This function “takes” the elements at indices from the slice items.
• get_available_parallelism
  Returns the estimated number of threads available for parallel execution.
• get_row_at_idx
  Given column vectors, returns row at idx.
• is_sorted
  Checks whether the given index sequence is monotonically non-decreasing.
• 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.
• list_ndims
  Compute the number of dimensions in a list data type.
• list_to_arrays
  Helper function to convert a ListArray into a vector of ArrayRefs.
• longest_consecutive_prefix
  This function finds the longest prefix of the form 0, 1, 2, … within the collection sequence. Examples:
• merge_and_order_indices
  Merges collections first and second, removes duplicates and sorts the result, returning it as a Vec.
• 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.
• set_difference
  Calculates the set difference between sequences first and second, returning the result as a Vec. Preserves the ordering of first.
• transpose
  Transposes the given vector of vectors.