Column Header for Select AS kind of query

Question

Hi,
I wish to write a csv file by using the odisqlunload function. I have wrote the funtion as :
OdiSqlUnload "-FILE=#FILE_PATH/#FILE_NAME" "-DRIVER=<%=odiRef.getInfo("SRC_JAVA_DRIVER")%>" "-URL=<%=odiRef.getInfo("SRC_JAVA_URL")%>" "-USER=<%=odiRef.getInfo("SRC_USER_NAME")%>" "-PASS=<%=odiRef.getInfo("SRC_ENCODED_PASS")%>" "-FILE_FORMAT=VARIABLE" "-FIELD_SEP=," "-ROW_SEP=\r\n" "-DATE_FORMAT=yyyy/MM/dd HH:mm:ss" "-CHARSET_ENCODING=ISO8859_1" "-XML_CHARSET_ENCODING=ISO-8859-1" "-FETCH_SIZE=1000" "-QUERY=SELECT RPAD(CI_FT_GL.GL_ACCT, 31, ' '),LPAD(CASE WHEN CI_FT.CURRENCY_CD != CI_FT_GL_EXT.DIVISION_CURCY_CD THEN sum(CI_FT_GL_EXT.DIVISION_AMT) ELSE sum(CI_FT_GL.AMOUNT) END,17,' '),' ',RPAD(CI_DST_CD_CHAR.CHAR_VAL, 25, ' '),RPAD(CI_DST_CD_CHAR.DST_ID, 8, ' '),'RMB ',' ',RPAD(to_char(sysdate, 'YYYYMMDD'), 8, ' ') FROM CI_DST_CD_CHAR CI_DST_CD_CHAR,CI_FT CI_FT,CI_FT_GL CI_FT_GL,CI_FT_GL_EXT CI_FT_GL_EXT where (CI_FT.FT_ID = CI_FT_GL.FT_ID) AND (CI_FT_GL.FT_ID = CI_FT_GL_EXT.FT_ID(+)) AND CI_FT_GL.GL_SEQ_NBR = CI_FT_GL_EXT.GL_SEQ_NBR(+) AND (CI_FT_GL.DST_ID = CI_DST_CD_CHAR.DST_ID) AND (CI_DST_CD_CHAR.CHAR_TYPE_CD = 'DTLREF1') AND (trim(CI_FT_GL.GL_ACCT) is not null) AND (CI_FT.XFER_TO_GL_DT is null) AND (CI_FT.GL_DISTRIB_STATUS in ('G','M')) AND (trunc(CI_FT.SCHED_DISTRIB_DT) <= trunc(sysdate)) AND CI_FT.CIS_DIVISION = '#DIVISION' GROUP BY CI_FT_GL.GL_ACCT,CI_DST_CD_CHAR.CHAR_VAL,CI_DST_CD_CHAR.DST_ID,CI_FT.CURRENCY_CD,CI_FT_GL_EXT.DIVISION_CURCY_CD"
Then i used a jython code to generate headers. Bcoz the OdiSqlUnload does not generate headers. But the jython code is not useful when we have sql statements lik 'Select AS' :
SELECT RPAD(CI_FT_GL.GL_ACCT, 31, ' ') AS GL_ACCT,
LPAD(CASE WHEN CI_FT.CURRENCY_CD != CI_FT_GL_EXT.DIVISION_CURCY_CD THEN sum(CI_FT_GL_EXT.DIVISION_AMT) ELSE sum(CI_FT_GL.AMOUNT) END,17,' ') AS GL_AMOUNT,
My Jython code is:
import string
import java.sql as sql
import java.lang as lang
import re
sourceConnection = odiRef.getJDBCConnection("SRC")
output_write=open('d:/Bijal/output1.csv','r+')
myStmt = sourceConnection.createStatement()
my_query = "SELECT RPAD(CI_FT_GL.GL_ACCT, 31, ' ') AS GL_ACCT,
LPAD(CASE WHEN CI_FT.CURRENCY_CD != CI_FT_GL_EXT.DIVISION_CURCY_CD THEN sum(CI_FT_GL_EXT.DIVISION_AMT) ELSE sum(CI_FT_GL.AMOUNT) END,17,' ') AS GL_AMOUNT,
' ' AS BLANK1,
RPAD(CI_DST_CD_CHAR.CHAR_VAL, 25, ' ')AS DESCR,
RPAD(CI_DST_CD_CHAR.DST_ID, 8, ' ')AS DST_ID,
'RMB ' Currency_Cd,
' ' AS BLANK2,
RPAD(to_char(sysdate, 'YYYYMMDD'), 8, ' ') AS DT_OF_TXN
FROM CI_DST_CD_CHAR CI_DST_CD_CHAR,CI_FT CI_FT,CI_FT_GL CI_FT_GL,CI_FT_GL_EXT CI_FT_GL_EXT
where (CI_FT.FT_ID = CI_FT_GL.FT_ID) AND (CI_FT_GL.FT_ID = CI_FT_GL_EXT.FT_ID(+)) AND
CI_FT_GL.GL_SEQ_NBR = CI_FT_GL_EXT.GL_SEQ_NBR(+) AND (CI_FT_GL.DST_ID = CI_DST_CD_CHAR.DST_ID)
AND (CI_DST_CD_CHAR.CHAR_TYPE_CD = 'DTLREF1') AND (trim(CI_FT_GL.GL_ACCT) is not null)
AND (CI_FT.XFER_TO_GL_DT is null) AND (CI_FT.GL_DISTRIB_STATUS in ('G','M')) AND
(trunc(CI_FT.SCHED_DISTRIB_DT) <= trunc(sysdate)) AND CI_FT.CIS_DIVISION = 'MF'
GROUP BY CI_FT_GL.GL_ACCT,
CI_DST_CD_CHAR.CHAR_VAL,
CI_DST_CD_CHAR.DST_ID,
CI_FT.CURRENCY_CD,
CI_FT_GL_EXT.DIVISION_CURCY_CD"
my_query=my_query.upper()
if string.find(my_query, '*') > 0:
myRs = myStmt.executeQuery(my_query)
md=myRs.getMetaData()
collect=[]
i=1
while (i <= md.getColumnCount()):
collect.append(md.getColumnName(i))
i += 1
header=','.join(map(string.strip, collect))
elif string.find(my_query,'||') > 0:
header = my_query[7:string.find(my_query, 'FROM')].replace("||','||",',')
else:
header = my_query[7:string.find(my_query, 'FROM')]
print header
old=output_write.read()
output_write.seek(0)
output_write.write (header+'\n'+old)
sourceConnection.close()
output_write.close()
But it does not populate for Select As statements and throws error lik:
'mismatched character \'\\n\' expecting \'"\'', ('<string>', 8, 62, 'my_query = "SELECT RPAD(CI_FT_GL.GL_ACCT, 31, \' \') AS GL_ACCT,\n'))
Plz help me get headers in my output file :)

Answer 1

Solution1:
Still you can achieve this by using sys_connect_by_path ( if you know the use of it) to generate header. below link can help with another approach.
http://www.business-intelligence-quotient.com/?p=546
Solution2:
You need to create one file (header= true )with interface as suggested by sutirtha. Then you can copy (odifilecopy) this file to another directory with dynamic name (inside variable) and dynamic path. In this interface keep the truncate option to true so that everytime data wont be appended to the end of file. After reversing the file change the column name Manually from C1 to your ACTUAL_COL_NAME in file. Because ODI always generate the column names using C1,C2,C3 ....
The only risk in second approach is that if someone will delete the file then you will get error. For this you need to create a temp table in ODI with all column-name (header in file). then using above jython code or sys_connect_by_path (select * from temp_table), you can generate the header easily. Now this file will be generated dynamically and can be used by the interface. So even if someone will delete the file you can generate it during run time.
Thanks.