docs/sql-ref-syntax-qry-select-tvf.md

layout: global title: Table-valued Functions (TVF) displayTitle: Table-valued Functions (TVF) license: | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

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Description

A table-valued function (TVF) is a function that returns a relation or a set of rows.

Syntax

function_name ( expression [ , ... ] ) [ table_alias ]

Parameters

expression
Specifies a combination of one or more values, operators and SQL functions that results in a value.
table_alias
Specifies a temporary name with an optional column name list.
Syntax: [ AS ] table_name [ ( column_name [ , ... ] ) ]

Supported Table-valued Functions

Function	Argument Type(s)	Description
range ( end )	Long	Creates a table with a single LongType column named id, containing rows in a range from 0 to end (exclusive) with step value 1.
range ( start, end )	Long, Long	Creates a table with a single LongType column named id, containing rows in a range from start to end (exclusive) with step value 1.
range ( start, end, step )	Long, Long, Long	Creates a table with a single LongType column named id, containing rows in a range from start to end (exclusive) with step value.
range ( start, end, step, numPartitions )	Long, Long, Long, Int	Creates a table with a single LongType column named id, containing rows in a range from start to end (exclusive) with step value, with partition number numPartitions specified.

Examples

-- range call with end
SELECT * FROM range(6 + cos(3));
+---+
| id|
+---+
|  0|
|  1|
|  2|
|  3|
|  4|
+---+

-- range call with start and end
SELECT * FROM range(5, 10);
+---+
| id|
+---+
|  5|
|  6|
|  7|
|  8|
|  9|
+---+

-- range call with numPartitions
SELECT * FROM range(0, 10, 2, 200);
+---+
| id|
+---+
|  0|
|  2|
|  4|
|  6|
|  8|
+---+

-- range call with a table alias
SELECT * FROM range(5, 8) AS test;
+---+
| id|
+---+
|  5|
|  6|
|  7|
+---+

Related Statements

SELECT