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2

Did you check this for the NULL case?
– Flinsch
Commented Jan 14, 2020 at 9:45
2

Yes, I did. It does not return empty nor null string fields.
– yglodt
Commented Jan 14, 2020 at 11:58
1

If you just need to check only empty values, then try this -> where length(stringexpression) = 0;. This works for me.
– Kushan Gunasekera
Commented Jun 5, 2020 at 12:15
I like this solution, just note that is some cases calculating exact length may be relatively expensive operation.
– noonex
Commented Jul 28, 2021 at 12:01
2

In postgres, length(NULL) > 0 return NULL, not False.
– Automatico
Commented Sep 19, 2022 at 12:43

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Correct minor typos or mistakes
Clarify meaning without changing it
Add related resources or links
Always respect the author’s intent
Don’t use edits to reply to the author

create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)
<https://example.com>
[example](https://example.com)
<a href="https://example.com">example</a>

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