spark-instrumented-optimizer/docs/sql-ref-syntax-qry-select-tvf.md

---
layout: global
title: Table-valued Functions (TVF)
displayTitle: Table-valued Functions (TVF)
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  this work for additional information regarding copyright ownership.
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---

### Description

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

### Syntax

```sql
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*, <br/> 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*, <br/> 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*, <br/> 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*, <br/> containing rows in a range from *start* to *end* (exclusive) with *step* value, with partition number *numPartitions* specified.|

### Examples

```sql
-- 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](sql-ref-syntax-qry-select.html)