Problem with PgTcl auditing function on trigger

Hi people,

I've tried posting on the general list about this, but I never get a
reply, so I'm trying here.

I have a function that is run each time an INSERT, DELETE or UPDATE
happens on a row and log into an audit table.

It is based on the info here:

http://www.alberton.info/postgresql_table_audit.html

We have a table Customers.CREDIT with a primary key "NUMBER",
"TRANSNO", "RECNUM".

I have a trigger as follows:

CREATE TRIGGER "tg_audit_credit"
AFTER INSERT OR DELETE OR UPDATE ON "Customers"."CREDIT"
FOR EACH ROW
EXECUTE PROCEDURE "log_to_audit_table" ();

This uses the attached tcl function which basically runs this for a
delete

spi_exec -array C "INSERT INTO audit_table(ts, usr, tbl, fld,
pk_name, pk_value, mod_type, old_val, new_val)
 VALUES (CURRENT_TIMESTAMP, '$tguser', '$tgname', '$modified_field',
'$pk_name', '$pk_value', '$TG_op', '$previous_value', NULL)"

The function works fine for this SQL statement

delete from "CREDIT" where "TRANSNO" < 11148188 AND "TRANSNO" >
11148180;

However if I try this one I get a syntax error.

delete from "CREDIT" where "RECNUM" < 2484907 AND "RECNUM" > 2484905;


The error is below. Do I need to escape my strings? And if so how do
I do this?

Thanks
Glyn


SEE=# delete from "CREDIT" where "RECNUM" < 2484907 AND "RECNUM" >
2484905;
ERROR:  syntax error at or near "S"
CONTEXT:  syntax error at or near "S"
    while executing
"spi_exec -array C "INSERT INTO audit_table(ts, usr, tbl, fld,
pk_name, pk_value, mod_type, old_val, new_val)
VALUES (CURRENT_TIMESTAMP, '$tguser', '$t..."
    ("foreach" body line 5)
    invoked from within
"foreach field $TG_relatts {
    if {! [string equal -nocase [lindex [array get OLD $field] 0]
$pk_name]} {
      set modified_field [lindex [array get..."
    ("DELETE" arm line 11)
    invoked from within
"switch $TG_op {
INSERT {

  #get PK value
  foreach field $TG_relatts {
    if {[string equal -nocase [lindex [array get NEW $field] 0]
$pk_name]} {..."
    (procedure "__PLTcl_proc_5667381_trigger_16644" line 23)
    invoked from within
"__PLTcl_proc_5667381_trigger_16644 tg_audit_credit 16644 CREDIT
Customers {{} RECNUM TRANSNO NUMBER EXMON EXYEAR OLDTICK COACHES
VALUE POSTAGE DEPOSIT..."




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