Re: What's wrong in this pltcl function ?

Constantin Teodorescu <teo(at)flex(dot)ro> writes:
> create function ruldeb(bpchar) returns bpchar as '
> set cont $1
> set rulaj 0.0
> spi_exec -array rec "select valoare from valori where debitor LIKE
> \'$cont%\'" {
> set rulaj [expr {$rulaj + $rec(valoare)}]
> }
> if {![info exists GD(conturi_lookup)]} {
> set GD(conturi_lookup) [spi_prepare "select cheie,denumire from
> conturi where id=\'\\$1\'" [list bpchar]]
> }
> spi_execp -count 1 $GD(conturi_lookup) [list $cont]
> return "{$cheie} {$denumire} $rulaj"
> ' LANGUAGE 'pltcl';

> is giving the following error:

> ERROR: pltcl: can't read "cheie": no such variable
> can't read "cheie": no such variable

I think what is happening is that the select is returning zero rows, and
so none of the output variables get set. You should be checking that
spi_execp returns a value greater than 0 before trying to use the column
variables.

As for *why* the select returns zero rows, I think you want the query
to read like
... where id=\\$1"
As is, it's always looking for the literal id value $1.

regards, tom lane