Zoltan Boszormenyi <zboszor@dunaweb.hu> writes:
> $ time echo "select * from v_invoice_browse where code||inv_no = 'CARO200000020'" | dbaccess db

> Is there a way to speed this operation up?

Make an expression index on "code||inv_no", if you think this case is
important enough to be worth maintaining an extra index for.

(This is not on-topic for -hackers, IMHO. Try pgsql-perform.)

regards, tom lane

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