handle null blob properly

JumpMind · Oct 17, 2007 · 9a5e347 · 9a5e347
1 parent da8207c
commit 9a5e347
Showing 1 changed file with 10 additions and 10 deletions.
diff --git a/symmetric/src/main/resources/oracle-transactionid.sql b/symmetric/src/main/resources/oracle-transactionid.sql
@@ -24,20 +24,20 @@ CREATE OR REPLACE package body pack_symmetric as
 CREATE OR REPLACE FUNCTION fn_sym_blob2clob (blob_in IN BLOB)
 RETURN CLOB
 AS
-	v_clob    CLOB;
+	v_clob    CLOB := null;
 	v_varchar VARCHAR2(32767);
 	v_start	  PLS_INTEGER := 1;
 	v_buffer  PLS_INTEGER := 32767;
 BEGIN
-	DBMS_LOB.CREATETEMPORARY(v_clob, TRUE);
-
-	FOR i IN 1..CEIL(DBMS_LOB.GETLENGTH(blob_in) / v_buffer)
-	LOOP	
-		v_varchar := UTL_RAW.CAST_TO_VARCHAR2(DBMS_LOB.SUBSTR(blob_in, v_buffer, v_start));
-		DBMS_LOB.WRITEAPPEND(v_clob, LENGTH(v_varchar), v_varchar);
-		v_start := v_start + v_buffer;
-	END LOOP;
-
+	IF blob_in IS NOT NULL THEN
+		DBMS_LOB.CREATETEMPORARY(v_clob, TRUE);
+		FOR i IN 1..CEIL(DBMS_LOB.GETLENGTH(blob_in) / v_buffer)
+		LOOP	
+			v_varchar := UTL_RAW.CAST_TO_VARCHAR2(DBMS_LOB.SUBSTR(blob_in, v_buffer, v_start));
+			DBMS_LOB.WRITEAPPEND(v_clob, LENGTH(v_varchar), v_varchar);
+			v_start := v_start + v_buffer;
+		END LOOP;
+	END IF;
 	RETURN v_clob; 
 END fn_sym_blob2clob;
 /