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Dynamic SQL in table SQL UDFs

In a DB2 V8.1 FP4 database I am trying to create a table SQL UDF that
is to return a contents of a temporary table with in this UDF:
create function getitemdata(pint int)
returns table
hostid smallint,
owid bigint
specific getitemdata
begin atomic
declare v_temp_sql varchar(256);

set v_temp_sql =
'declare global temporary table '||
'item_data_tmp '||
'( '||
' hostid smallint, '||
' owid bigint '||
') '||
'on commit preserve rows not logged with replace' ;

execute immediate v_temp_sql;

<...inserting into session.item_data_tmp here...>

return select * from session.item_data_tmp;

It fails returning:

DB21034E The command was processed as an SQL statement because it was
not a
valid Command Line Processor command. During SQL processing it
SQL0104N An unexpected token "execute immediate v_temp_sql;
<...inse" was
found following "mpuser_8k_01' ; ". Expected tokens may include:
"<space>". LINE NUMBER=25. SQLSTATE=42601

Are dinamic SQL statements (EXECUTE/PREPARE) not allowed in table SQL
UDFs (FP4)? Any workaround?

Nov 12 '05 #1
1 2340
No can do. Only the statements listed in "Compound Statement (Dynamic)"
are allowed in inline SQL PL. The idea is to keep it small and slick.
I would propose to use a persistent table and some unique "token" to
privatize access to the table by session.


Serge Rielau
DB2 SQL Compiler Development
IBM Toronto Lab

Nov 12 '05 #2

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