【问题】BLOB类型转CLOB出现乱码问题
CREATE OR REPLACE FUNCTION BlobToClob(blob_in IN BLOB) RETURN CLOB AS
v_clob CLOB;
v_varchar VARCHAR2(4000);
v_start PLS_INTEGER := 1;
v_buffer PLS_INTEGER := 4000;
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 BlobToClob;
中文出现乱码
【分析】字符应该需要转换
百度后
select convert(UTL_RAW.CAST_TO_VARCHAR2(blob_field),