I have a large customer who is converting from informix to postgres and
they have made extensive use of 

update table set (col...) = ( val...)

as a first pass would it be possible to translate this in the parser to

update table set col=val

It would appear that this is SQL3 compliant

<set clause> ::=
 <update target> <equals operator> <row value designator>

<update target> ::=
 <object column>
 | <left paren> <object column list> <right paren>

or can someone think of another way?
Cramer Consulting

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