## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
'fontFamily': 'Arial'
}
}}%%
flowchart LR
Start((START)) --> ZLIB_DECOMPRESS[ZLIB_DECOMPRESS]:::quoted
ZLIB_DECOMPRESS --> End((END))
```
## Purpose
The `ZLIB_DECOMPRESS` SQL function decompresses a `blob` using the Zlib-algorithm.
See also [[ZLIB_COMPRESS]] and [[UNGZIP]].
Parameters:
- input (`blob`): the `blob` to decompress.
Returns: the decompressed `blob`.
## Examples
The following example decompresses a Zlib-compressed `blob` and retrieves the original text:
```sql
select blob_to_text(zlib_decompress(zlib_compress(ascii_to_blob('ACME'))))
-------------------
ACME
```
The following example decompresses a Zlib-compressed `blob` and converts the result to text:
```sql
select to_char(zlib_decompress('eJwLycgsVgCiRIWy1KJKhZz8vHSFktSKEoWSfCBdDKQzUhWifDKTFJLzcwuKUouLM/PzFHJTSzLyUwCN0xX5'))
-------------------
This is a very long text to test the ZLib compression method
```