How to check if INSERT went well in stored function?

StackOverflow https://stackoverflow.com/questions/5939010

  •  30-10-2019
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문제

I'm creating a stored function which should insert new row to table. In this table is also one unique column.

How can I check if everything goes well and row really was inserted?

How can I check exactly that it's this unique column found (for example - try to add duplicate value)?

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