Can I convert existing column BLOB to CLOB?

Hi ,
I need conversion of existing column from BLOB to CLOB. Kindly sueggest workaround. Table structure is as
{ desc tab1;
Name Null? Type
Name Null? Type
RECID NOT NULL VARCHAR2(255)
XMLRECORD BLOB}
I need to convert it from blob to clob. Kindly provide workaround.
Regards

Hi,
How can i use this function for my scenario
1. Table name is "test" and XMLRECORD column should be in CLOB without drop table. Kindly update this fuction as per my scenario and also provide all the steps
CREATE OR REPLACE FUNCTION blob_to_clob (blob_in IN BLOB)
RETURN CLOB
AS
v_clob CLOB;
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;
RETURN v_clob;
END blob_to_clob;
]

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=========================================================================================
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