# isinf — Haybarn WASM 1.5.5-rc3

Returns true if the floating point value is infinite, false otherwise

- Reference: /products/haybarn/functions/releases/haybarn-1.5.5-rc3/isinf/
- JSON: /products/haybarn/functions/api/v1/haybarn-1.5.5-rc3/functions/isinf.json
- Snapshot ID: haybarn-1.5.5-rc3
- Engine: haybarn v1.5.6-dev149
- Source ID: 105edd31b5
- Binary SHA-256: 426638bc374fcc542fea93b251f885bfb7d221c68fcc0a5a81cc565d7e6ca180
- Captured: 2026-09-06T00:23:30.515Z
- Source: https://www.npmjs.com/package/@haybarn/haybarn-wasm/v/1.5.5-rc3
- Loaded extensions: core_functions, icu, json, parquet

## Interpretation

- Choose a snapshot matching the target engine and build. The default is captured from the published Haybarn WASM package used by the browser playground. Historical native snapshots are also available.
- Availability is an observation in the recorded build and extension profile, not a guarantee of support in every installation or in WASM.
- Types and descriptions are declarations from duckdb_functions(). Binding can specialize result types. Null means not supplied by the catalog; do not invent defaults, optionality, argument mode, or table output columns.
- Raw parameter arrays preserve catalog order for scalar/aggregate/macro functions. Raw table arguments are alphabetical. Use callingConvention for engine-confirmed positional order and named arguments; null modes are unrecorded. Named does not mean optional. Macro defaults and special named variadic behavior are not supplied by duckdb_functions().
- Catalog examples are source material and may require data or extensions. runnableExamples contains separately verified SQL for the pinned WASM package; sample-data adaptations and guide examples are labeled separately.
- Guide annotations and recipes are separate editorial content. The browser runner always uses Haybarn WASM 1.5.5-rc3, independently of the documentation snapshot.
- All URLs beginning with / are relative to the origin hosting this document. Exports require no JavaScript, cookies, API key, or browser engine.

## Overloads

### overload-b64fd485b05ab078

Kind: scalar. Parameter order: catalog-order.

```text
isinf(x: DATE) → BOOLEAN
```

Link: /products/haybarn/functions/releases/haybarn-1.5.5-rc3/isinf/#overload-b64fd485b05ab078

| Argument | Catalog type | Calling mode |
| --- | --- | --- |
| x | DATE | not recorded |

Declared return type: BOOLEAN. Variadic argument type: none declared.
Stability: CONSISTENT. Declared side effects: false.

### overload-583595419634aded

Kind: scalar. Parameter order: catalog-order.

```text
isinf(x: DOUBLE) → BOOLEAN
```

Link: /products/haybarn/functions/releases/haybarn-1.5.5-rc3/isinf/#overload-583595419634aded

| Argument | Catalog type | Calling mode |
| --- | --- | --- |
| x | DOUBLE | not recorded |

Declared return type: BOOLEAN. Variadic argument type: none declared.
Stability: CONSISTENT. Declared side effects: false.

### overload-8cb8f75a4dbfcb36

Kind: scalar. Parameter order: catalog-order.

```text
isinf(x: FLOAT) → BOOLEAN
```

Link: /products/haybarn/functions/releases/haybarn-1.5.5-rc3/isinf/#overload-8cb8f75a4dbfcb36

| Argument | Catalog type | Calling mode |
| --- | --- | --- |
| x | FLOAT | not recorded |

Declared return type: BOOLEAN. Variadic argument type: none declared.
Stability: CONSISTENT. Declared side effects: false.

### overload-7268ee5085843e97

Kind: scalar. Parameter order: catalog-order.

```text
isinf(x: TIMESTAMP) → BOOLEAN
```

Link: /products/haybarn/functions/releases/haybarn-1.5.5-rc3/isinf/#overload-7268ee5085843e97

| Argument | Catalog type | Calling mode |
| --- | --- | --- |
| x | TIMESTAMP | not recorded |

Declared return type: BOOLEAN. Variadic argument type: none declared.
Stability: CONSISTENT. Declared side effects: false.

### overload-04cda23e5ab287b9

Kind: scalar. Parameter order: catalog-order.

```text
isinf(x: TIMESTAMP WITH TIME ZONE) → BOOLEAN
```

Link: /products/haybarn/functions/releases/haybarn-1.5.5-rc3/isinf/#overload-04cda23e5ab287b9

| Argument | Catalog type | Calling mode |
| --- | --- | --- |
| x | TIMESTAMP WITH TIME ZONE | not recorded |

Declared return type: BOOLEAN. Variadic argument type: none declared.
Stability: CONSISTENT. Declared side effects: false.


## Guide recipes

No guide recipes.

## Engine catalog examples

Source examples may require additional data or extensions. Expressions are wrapped in SELECT; execution verification is not recorded.

Reported for: overload-b64fd485b05ab078, overload-583595419634aded, overload-8cb8f75a4dbfcb36, overload-7268ee5085843e97, overload-04cda23e5ab287b9

```sql
SELECT isinf('Infinity'::float);
```

## Runnable examples

Executed successfully in Haybarn WASM 1.5.5-rc3. Sample data and guide examples are separate from the original catalog.

```sql
SELECT isinf('Infinity'::float);
```

## Additional DuckDB documentation

- [Date Functions](https://duckdb.org/docs/current/sql/functions/date#isinfdate)
- [Numeric Functions](https://duckdb.org/docs/current/sql/functions/numeric#isinfx)
- [Timestamp Functions](https://duckdb.org/docs/current/sql/functions/timestamp#isinftimestamp)

## In other engines

### BigQuery: is_inf()



BigQuery:

```sql
IS_INF(x)
```

Haybarn / DuckDB:

```sql
ISINF(x)
```

Translation from [SQLGlot](https://github.com/tobymao/sqlglot/blob/3086608e6fd4c41c02dfba47171608d2b193fce2/tests/dialects/test_duckdb.py#L2368).

### Snowflake: to_boolean()

Uses isinf as part of a larger rewrite.

Snowflake:

```sql
SELECT To_BOOLEAN('T')
```

Haybarn / DuckDB:

```sql
SELECT CASE WHEN UPPER(CAST('T' AS TEXT)) = 'ON' THEN TRUE WHEN UPPER(CAST('T' AS TEXT)) = 'OFF' THEN FALSE WHEN ISNAN(TRY_CAST('T' AS REAL)) OR ISINF(TRY_CAST('T' AS REAL)) THEN ERROR('TO_BOOLEAN: Non-numeric values NaN and INF are not supported') ELSE CAST('T' AS BOOLEAN) END
```

Translation from [SQLGlot](https://github.com/tobymao/sqlglot/blob/3086608e6fd4c41c02dfba47171608d2b193fce2/tests/dialects/test_snowflake.py#L1479).

## Observed availability

| Snapshot | Observed | Overloads | JSON |
| --- | --- | --- | --- |
| haybarn-1.5.5-rc3 | present | 5 | [reference](/products/haybarn/functions/api/v1/haybarn-1.5.5-rc3/functions/isinf.json) |
| duckdb-1.5.5 | present | 5 | [reference](/products/haybarn/functions/api/v1/duckdb-1.5.5/functions/isinf.json) |
| duckdb-1.4.4 | present | 5 | [reference](/products/haybarn/functions/api/v1/duckdb-1.4.4/functions/isinf.json) |
| duckdb-1.3.2 | present | 5 | [reference](/products/haybarn/functions/api/v1/duckdb-1.3.2/functions/isinf.json) |

Engine catalog documentation is derived from MIT-licensed Haybarn and DuckDB. [Notices](/third-party-notices.txt).