Oracle 18c:
What is the syntax for including multiple inline functions and multiple CTEs in a WITH clause in a single query?
Function #1:
function fucntion1(num in number) return number
is
begin
return num + 1;
end;
Function #2:
function fucntion2(num in number) return number
is
begin
return num + 2;
end;
CTE #1:
cte as (select 1 from dual)
CTE #2:
cte2 as (select 2 from dual)
As ever for a "what is the syntax for ..." questions, you should refer to the official documentation.
The SELECT
syntax is
query_block ::=
with_clause ::=
plsql_declarations ::=
subquery_factoring_clause ::=
function_definition ::=
body ::=
Therefore:
A PL/SQL function's body must be terminated with a ;
.
(Note: this is a PLSQL statement terminator and not a separator in the WITH
clause between PL/SQL function declarations as there is no separator character following PL/SQL function declarations.)
There is a ,
character between successive sub-query factoring clauses.
The SELECT
statement does not need a ;
or /
statement terminator but it may be allowed/required/forbidden by the client application you are using to denote the termination of the statement.
For example:
It looks like the syntax is:
with
function fucntion1(num in number) return number
is
begin
return num + 1;
end;
function fucntion2(num in number) return number
is
begin
return num + 2;
end;
cte as (select 1 from dual),
cte2 as (select 2 from dual)
select
fucntion1(1) as function_result
from
cte
union all
select
fucntion2(1)
from
cte2
FUNCTION_RESULT
---------------
2
3
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