Retrieve anonymous PLSQL block result

Question

I have some trouble retrieving the result of an anonymous PLSQL block in java.

Here is the block :

DECLARE
in_cnt_date DATE := \'&1\';
hv_cnt_id NUM         


        

Answer 1

It is because the implicit date conversion is failing. Add TO_DATE() instead of directly assigning the date string to a date variable. If java.sql.Date is used, the TO_DATE() is not required.

The implicit conversion usually depends on the session's NLS_DATE_FORMAT.

In your case in_cnt__date DATE := '&1' is the culprit. &1 will actually be attempted to convert into a date.. And hence the exception thrown!

public static final String CONTEXT = "DECLARE in_cnt__date DATE := ? ;" +
"hv_cnt_id NUMBER := 0; " +
"BEGIN DBMS_OUTPUT.ENABLE (NULL); " +
"INSERT INTO dt_contexts (CNT_ID, CNT_CONTEXT, CNT_TYPE, CNT_SOURCE, CNT_COMMENT, CNT_DATE, CNT_DATE_INSERT, CNT_DATE_UPDATE) " +
"VALUES (0, 'EPE_CONTEXT', 'ROUTE', 'bdd', 'Built from ROUTE', in_cnt__date, SYSDATE, SYSDATE); " +
"SELECT SEQ_DT_CNT_ID.CURRVAL INTO hv_cnt_id FROM DUAL; " +
"? := hv_cnt_id;
"EXCEPTION WHEN OTHERS THEN RAISE ; END;";

And then,

cs.setDate(1, (java.sql.Date) Route.datePrf);

Will set the date for in_cnt__date;

Finally, to retreive the values in hv_cnt_id The below is added to your PL/SQL block

"? := hv_cnt_id;"

And from JDBC, we get it like,

 cs.setDate(1, (java.sql.Date) Route.datePrf);
 cs.registerOutParameter(2, Types.NUMBER);
 cs.execute();
 contextId = cs.getInt(2);