Array Functions

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Array Reversal

arrayReverseInt

Description: Reverses the order of elements in an integer array. Syntax: arrayReverseInt(int_array) Example:

SELECT arrayReverseInt(ARRAY[1, 2, 3, 4, 5]);
-- Result: [5, 4, 3, 2, 1]

arrayReverseString

Description: Reverses the order of elements in a string array. Syntax: arrayReverseString(string_array) Example:

SELECT arrayReverseString(ARRAY['apple', 'banana', 'cherry']);
-- Result: ['cherry', 'banana', 'apple']

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Array Sorting

arraySortInt

Description: Sorts an integer array in ascending order. Syntax: arraySortInt(int_array) Example:

SELECT arraySortInt(ARRAY[4, 1, 3, 5, 2]);
-- Result: [1, 2, 3, 4, 5]

arraySortString

Description: Sorts a string array lexicographically. Syntax: arraySortString(string_array) Example:

SELECT arraySortString(ARRAY['banana', 'apple', 'cherry']);
-- Result: ['apple', 'banana', 'cherry']

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Array Index Operations

arrayIndexOfInt

Description: Returns the first 0-based index of an integer value. Syntax: arrayIndexOfInt(int_array, value) Example:

SELECT arrayIndexOfInt(ARRAY[10, 20, 3, 40], 3);
-- Result: 2

arrayIndexOfString

Description: Returns the first 0-based index of a string value. Syntax: arrayIndexOfString(string_array, value) Example:

SELECT arrayIndexOfString(ARRAY['apple', 'banana', 'cherry'], 'cherry');
-- Result: 2

arrayIndexesOfInt

Description: Returns all indices of an integer value. Syntax: arrayIndexesOfInt(int_array, value) Example:

SELECT arrayIndexesOfInt(ARRAY[5, 3, 5, 2, 5], 5);
-- Result: [0, 2, 4]

arrayIndexesOfLong

Description: Returns all indices of a long value. Syntax: arrayIndexesOfLong(long_array, value) Example:

SELECT arrayIndexesOfLong(ARRAY[5000000000, 3000000000, 5000000000], 5000000000);
-- Result: [0, 2]

arrayIndexesOfFloat

Description: Returns all indices of a float value. Syntax: arrayIndexesOfFloat(float_array, value) Example:

SELECT arrayIndexesOfFloat(ARRAY[1.5, 3.0, 1.5], 1.5);
-- Result: [0, 2]

arrayIndexesOfDouble

Description: Returns all indices of a double value. Syntax: arrayIndexesOfDouble(double_array, value) Example:

SELECT arrayIndexesOfDouble(ARRAY[123.456, 789.012, 123.456], 123.456);
-- Result: [0, 2]

arrayIndexesOfString

Description: Returns all indices of a string value. Syntax: arrayIndexesOfString(string_array, value) Example:

SELECT arrayIndexesOfString(ARRAY['a', 'b', 'a'], 'a');
-- Result: [0, 2]

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Array Intersection

intersectIndices

Description: Returns common indices between two sorted integer arrays. Syntax: intersectIndices(array1, array2) Example:

SELECT intersectIndices(ARRAY[1, 3, 5], ARRAY[3, 5]);
-- Result: [3, 5]

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Array Contains

arrayContainsInt

Description: Checks if an integer array contains a value. Syntax: arrayContainsInt(int_array, value) Example:

SELECT arrayContainsInt(ARRAY[3, 7, 9], 7);
-- Result: true

arrayContainsString

Description: Checks if a string array contains a value. Syntax: arrayContainsString(string_array, value) Example:

SELECT arrayContainsString(ARRAY['apple', 'banana'], 'apple');
-- Result: true

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Array Slicing

arraySliceInt

Description: Extracts a subarray (start inclusive, end exclusive). Syntax: arraySliceInt(int_array, start, end) Example:

SELECT arraySliceInt(ARRAY[10, 20, 30, 40], 1, 3);
-- Result: [20, 30]

arraySliceString

Description: Extracts a string subarray. Syntax: arraySliceString(string_array, start, end) Example:

SELECT arraySliceString(ARRAY['a', 'b', 'c', 'd'], 0, 2);
-- Result: ['a', 'b']

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Array Distinct

arrayDistinctInt

Description: Removes duplicate integers. Syntax: arrayDistinctInt(int_array) Example:

SELECT arrayDistinctInt(ARRAY[1, 2, 2, 3, 1]);
-- Result: [1, 2, 3]

arrayDistinctString

Description: Removes duplicate strings. Syntax: arrayDistinctString(string_array) Example:

SELECT arrayDistinctString(ARRAY['apple', 'banana', 'apple']);
-- Result: ['apple', 'banana']

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Array Remove

arrayRemoveInt

Description: Removes the first occurrence of an integer. Syntax: arrayRemoveInt(int_array, value) Example:

SELECT arrayRemoveInt(ARRAY[2, 4, 2, 6], 2);
-- Result: [4, 2, 6]

arrayRemoveString

Description: Removes the first occurrence of a string. Syntax: arrayRemoveString(string_array, value) Example:

SELECT arrayRemoveString(ARRAY['apple', 'banana', 'cherry'], 'banana');
-- Result: ['apple', 'cherry']

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Array Union

arrayUnionInt

Description: Combines two integer arrays with unique values. Syntax: arrayUnionInt(array1, array2) Example:

SELECT arrayUnionInt(ARRAY[1, 2], ARRAY[2, 3]);
-- Result: [1, 2, 3]

arrayUnionString

Description: Combines two string arrays with unique values. Syntax: arrayUnionString(array1, array2) Example:

SELECT arrayUnionString(ARRAY['a', 'b'], ARRAY['b', 'c']);
-- Result: ['a', 'b', 'c']

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Array Concatenation

arrayConcatInt

Description: Concatenates two integer arrays. Syntax: arrayConcatInt(array1, array2) Example:

SELECT arrayConcatInt(ARRAY[1, 2], ARRAY[3, 4]);
-- Result: [1, 2, 3, 4]

arrayConcatLong

Description: Concatenates two long arrays. Syntax: arrayConcatLong(array1, array2) Example:

SELECT arrayConcatLong(ARRAY[1000000000, 2000000000], ARRAY[3000000000]);
-- Result: [1000000000, 2000000000, 3000000000]

arrayConcatFloat

Description: Concatenates two float arrays. Syntax: arrayConcatFloat(array1, array2) Example:

SELECT arrayConcatFloat(ARRAY[1.5, 2.0], ARRAY[3.5]);
-- Result: [1.5, 2.0, 3.5]

arrayConcatDouble

Description: Concatenates two double arrays. Syntax: arrayConcatDouble(array1, array2) Example:

SELECT arrayConcatDouble(ARRAY[123.456], ARRAY[789.012]);
-- Result: [123.456, 789.012]

arrayConcatString

Description: Concatenates two string arrays. Syntax: arrayConcatString(array1, array2) Example:

SELECT arrayConcatString(ARRAY['a', 'b'], ARRAY['c']);
-- Result: ['a', 'b', 'c']

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Array Element Access

arrayElementAtInt

Description: Returns the 1-indexed integer element. Syntax: arrayElementAtInt(array, index) Example:

SELECT arrayElementAtInt(ARRAY[10, 20, 30], 2);
-- Result: 20

arrayElementAtLong

Description: Returns the 1-indexed long element. Syntax: arrayElementAtLong(array, index) Example:

SELECT arrayElementAtLong(ARRAY[1000000000, 2000000000], 1);
-- Result: 1000000000

arrayElementAtFloat

Description: Returns the 1-indexed float element. Syntax: arrayElementAtFloat(array, index) Example:

SELECT arrayElementAtFloat(ARRAY[1.5, 2.0], 2);
-- Result: 2.0

arrayElementAtDouble

Description: Returns the 1-indexed double element. Syntax: arrayElementAtDouble(array, index) Example:

SELECT arrayElementAtDouble(ARRAY[123.456, 789.012], 1);
-- Result: 123.456

arrayElementAtString

Description: Returns the 1-indexed string element. Syntax: arrayElementAtString(array, index) Example:

SELECT arrayElementAtString(ARRAY['alpha', 'beta', 'gamma'], 1);
-- Result: 'alpha'

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Array Summation

arraySumInt

Description: Sums all integers in an array. Syntax: arraySumInt(int_array) Example:

SELECT arraySumInt(ARRAY[1, 2, 3, 4]);
-- Result: 10

arraySumLong

Description: Sums all longs in an array. Syntax: arraySumLong(long_array) Example:

SELECT arraySumLong(ARRAY[1000000000, 2000000000]);
-- Result: 3000000000

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Array Construction

arrayValueConstructor

Description: Constructs an array from elements. Syntax: array(element1, element2, ...) Example:

SELECT array(1, 2, 3) AS int_array, array('a', 'b') AS str_array;
-- Result: 
-- int_array = [1, 2, 3]
-- str_array = ['a', 'b']

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Array Generation

generateIntArray

Description: Generates an integer sequence. Syntax: generateIntArray(start, end, increment) Example:

SELECT generateIntArray(1, 5, 2);
-- Result: [1, 3, 5]

generateLongArray

Description: Generates a long sequence. Syntax: generateLongArray(start, end, increment) Example:

SELECT generateLongArray(100, 300, 100);
-- Result: [100, 200, 300]

generateFloatArray

Description: Generates a float sequence. Syntax: generateFloatArray(start, end, increment) Example:

SELECT generateFloatArray(0.5, 2.0, 0.5);
-- Result: [0.5, 1.0, 1.5, 2.0]

generateDoubleArray

Description: Generates a double sequence. Syntax: generateDoubleArray(start, end, increment) Example:

SELECT generateDoubleArray(1.0, 2.5, 0.5);
-- Result: [1.0, 1.5, 2.0, 2.5]

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String Conversion

arrayToString (2-argument)

Description: Joins elements with a delimiter. Syntax: arrayToString(string_array, delimiter) Example:

SELECT arrayToString(ARRAY['red', 'green', 'blue'], ',');
-- Result: 'red,green,blue'

arrayToString (3-argument)

Description: Joins elements with null replacement. Syntax: arrayToString(string_array, delimiter, nullString) Example:

SELECT arrayToString(ARRAY['foo', NULL, 'bar'], '|', 'NA');
-- Result: 'foo|NA|bar'