Eddy Hahn <EDDYH@xxxxxxxxxxxxxxxxxxx> writes:
> 1) I'm reading the API documentation and I'm wondering how the client library would handle the following statement
> INSERT INTO test (value1, value2) VALUES ('$1', $1)
> Would it handle it incorrectly and would think that '$1' is the parameter or would it skip it because it know that it's a string value encapsulated in ''?
It should think that that's the literal constant dollarsign-one. That
will definitely work as expected if the client library is relying on
server-side parameter substitution. There have been versions of some
client libraries that did their own textual parameter substitution,
before the server-side facility existed. It's at least theoretically
possible that one of those would've got it wrong, but I've not heard
of actual cases.
> 2) Can $1 be used more then one times for example if you want to use the same value for multiple column value?
> UPDATE test set value1=$1,value2=$1
Sure.
regards, tom lane
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