Fix default functions in InsertEdit

[kamil-tekiela]

Fixes #20106

This PR manually reverts changes from 3df61fc#diff-d58b51fc688dae2c05250c4fab782e2efe206e8ffa0442f23031b16997daf238

[liviuconcioiu]

Now works, except if I have DefaultFunctions. Not sure how DefaultFunctions is supposed to work here. From my understanding, everything is by default, except if I change it here, it will take value from config.

LE: In 5.2.4-dev works.

OK:

$cfg['DefaultFunctions'] = [
    'FUNC_SPATIAL' => 'ST_GeomFromText',
];

NOT OK:

$cfg['DefaultFunctions'] = [
    'first_timestamp' => '',
];

15.02.2026_19.18.06_REC.mp4

[kamil-tekiela]

I'm not sure either. This needs some more investigation. Was it working fine before #19857?

[liviuconcioiu]

I see it working in 5.2.4-dev

[liviuconcioiu]

Yes, it was working before 19857

[kamil-tekiela]

Now works, except if I have DefaultFunctions. Not sure how DefaultFunctions is supposed to work here. From my understanding, everything is by default, except if I change it here, it will take value from config.

LE: In 5.2.4-dev works.

OK:

$cfg['DefaultFunctions'] = [
    'FUNC_SPATIAL' => 'ST_GeomFromText',
];

NOT OK:

$cfg['DefaultFunctions'] = [
    'first_timestamp' => '',
];

15.02.2026_19.18.06_REC.mp4

Found it. That's something different, though. I am going to treat it separately.