Checking dynamic query at run time

Question

i need to check whether the query is valid or not at run time. The query will be formed based on the column name, table name, and where clause. this query is purely a select statement. if column name and table names are diff then system should display an error msg. i have more than 10 tables and the table name will be selected from LOV. i should be allowed to enter the condition for where clause also ar run time and this condition column should also be validated.

Answer 1

Hi,
I think you only want to see if your select statement has compilation error or not because when you use dynamic statement it doesnt show the compilation erro if the statement has it or not. What you can do is add an item say "stmt" in your control block. change the property to multi record so that you can see multiple lines in that item and make the lenght say 2000. Now assign your statement into "stmt" for example
:control_block.stmt := 'select ' || col1
                    || ','
                    || col2
                    || ','
                    || col3
                    || ' FROM '
                    || table
                    || ' where ' || conditionput this statement on any button on when-button-pressed trigger. When you will press the button on run time you will see the statement. Run that statement on sql*plus or toad and check if there is any problem in the statement.
Hope this helps
Ghulam