Array functions
array_dims
Returns the dimensions of array as a string. array must be one dimensional.
array_dims ( array ) → string
array_dims ( array[2,3,4] ) → [1:3]
array_distinct
Returns an array of the same type as the input array with all duplicate values removed.
array_distinct(array) → array
array_distinct(array[1,2,1,1]) → {1,2}
array_length
Returns the length of array.
array_length(array) → int
array_length(array[1,2,3,4,1]) → 5
array_length
Returns the length of the requested array dimension in array. int must be 1.
array_length ( array, int ) → int
array_length ( array[2, 3, 4], 1 ) → 3
array_lower
Returns the lower bound of the requested array dimension in array. (This is always 1 or null.)
array_lower ( array, int ) → int
array_lower ( array[2, 3, 4], 1 ) → 1
array_ndims
Returns the number of dimensions of array.
array_ndims ( array ) → int
array_ndims ( array[array[2,3], array[4,5]] ) → 2
array_position
Returns the subscript of the first occurrence of any_compatible element in array.
array_position(array, any_compatible) → int
array_position(array[1,2,3,4,5,6,1,2,3,4,5,6], 4) → 4
array_positions
Returns an array of the subscripts of all occurrences of any_compatible element in array.
array_positions(array, any_compatible) → array
array_positions(array[1,2,3,4,5,6,1,2,3,4,5,6], 4) → {4, 10}
array_remove
Returns an array with all occurrences of any_compatible element removed. Multidimensional arrays are also supported.
array_remove(*array, any_compatible) → array
array_remove(array[array[1],array[2],array[3],array[2]], array[2]) → {{1},{3}}
array_replace
Returns an array with all occurrences of current_element replaced with new_element. Multidimensional arrays are also supported. When the array is multidimensional, the element must be an array of one less dimension. Recursively replacing the base element of a multidimensional array is not supported.
array_replace(array, current_element, new_element) → array
array_replace(array[7, null, 8, null], null, 0.5) → {7,0.5,8,0.5}
array_to_string and array_join
Converts an array to a string. The optional delimiter_string separates the array's elements in the resulting string, and the optional null_string represents NULL elements in the array. array_join can also be used instead of array_to_string.
array_to_string(array, delimiter_string, null_string) → string
array_join(array, delimiter_string, null_string) → string
array_to_string(array[1, 2, 3, NULL, 5], ',', '*') → 1,2,3,*,5
array_join(array[1, 2, 3, NULL, 5], ',', '*') → 1,2,3,*,5
array_upper
Returns the upper bound of the requested array dimension in array. int must be 1. (This will return the same value as array_length.)
array_upper ( array, int ) → int
array_upper ( array[array[2, 3, 4], array[3, 4, 5]], 1 ) → 2
cardinality
Returns the total number of elements in array or 0 if the array is empty.
cardinality(array) → int
cardinality(array[array[array[3,4,5],array[2,2,2]],array[array[6,7,8],array[0,0,0]]]) → 12
string_to_array
Converts a string to an array. The optional delimiter_string separates the string's elements to create the resulting array, and the optional null_string represents NULL elements in the array.
string_to_array(string, delimiter_string, null_string) → array
string_to_array('a b c', ' ', 'a') → {NULL,b,c}
trim_array
Trims an array by removing the last n elements. If the array is multidimensional, only the first dimension is trimmed.
trim_array(array, num_of_elements_to_trim) → array
trim_array(array[1,2,3,4,5,NULL], 4) → {1,2}
unnest
Expands an array, or combination of arrays, into a set of rows. The array's elements are output in the order they are stored.
unnest(array) → set_of_any_element
unnest(Array[Array[1,3,4,5],Array[2,3]]) →
1
3
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5
2
3
