Stage tab delimited CSV file and load the data into a different table

Hi,
I pretty new to writing PL/SQL packages.
We are using Application express for our development. We get CSV files which is stored as a BLOB content in a table. I need to write a trigger that would get executed once the user the uploads the file and parse thru the Blob content and upload or stage the data in a different table.
I would like to see if there is any tutorial or article that could explain the above process with the example or sample code to do the same. Any help in this regard will be highly appreciated.

Hi,
This is slightly unusual but at the same time easy to solve. You can read through a blob using the dbms_lob package, which is one of the Oracle supplied packages. This is presumably the bit you are missing, as once you know how you read a lob the rest is programming 101.
Alternatively, you could write the lob out to a file on the server using another built in package called utl_file. This file can be parsed using an appropriately defined external table. External tables are the easiest way of reading data from flat files, including csv.
I say unusual because why are you loading a csv file into a blob? A clob is almost understandable but if you can load into a column in a table why not skip this bit and just load the data as it comes in straight into the right table?
All of what I have described is documented functionality, assuming you are on 9i or greater. But you didn't provide a version so I can't provide a link to the documentation ;)
HTH
Chris

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ISA*00*          *00*          *ZZ*043000096820   *ZZ*2156833510     *131202*0710*U*00401*000001204*0*P*>\ ignore first 2 lines
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CREATE OR REPLACE package body p1 is
Function parse_spec(p_str varchar2) return t_str_nt is
begin
      return regexp_replace(p_str,'\\$',null);
end;
procedure edi( is
l_out_file              utl_file.file_type;
l_lin                 varchar2(200);
field1            number(9);
field2                varchar2(10 byte);
field3           varchar2(15 byte);
field4               varchar2(15 byte);
field5              varchar2(20 byte);
field6             varchar2(20 byte);
field7              varchar2(20 byte);
field8                  varchar2(9 byte);
field9              varchar2(15 byte);
field10             varchar2(5 byte);
l_item_nt             t_str_nt:=t_str_nt();
begin
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    LOOP
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          raise no_data_found;
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                        field9 := regexp_substr(regexp_substr(parse_spec(line),'[^*]+',1,5),'[^ ]+',1,2);
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end loop;
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exception
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               dbms_output.put_line('No data found');
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I would not use regular expressions for parsing as it is CPU intensive - and standard string processing suffices.
I would break the EDI up into lines. I would tokenise each line. I then have 2d array that can be referenced to find a specific field. E.g. line x and token y is field abc.
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SQL> create or replace type TStrings as table of varchar2(4000);
2 /
Type created.
SQL> -- create a parser that tokenises a string
SQL> create or replace function Tokenise(
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3          separator varchar2 default ',',
4          enclosedBy varchar2 default null
5 ) return TStrings is
6          strList         TStrings;
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11          enclose2        integer;
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13          replaceStr      varchar2(4000);
14
15          procedure AddString( line varchar2 ) is
16          begin
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20
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23
24          str := csvLine;
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29                          enclose2 := InStr( str, enclosedBy, 2 );
30
31                          if (enclose1 > 0) and (enclose2 > 0) and (enclose2 > enclose1) then
32                                  -- extract the enclosed string
33                                  encloseStr := SubStr( str, enclose1, enclose2-enclose1+1 );
34                                  -- replace the separator char's with zero char's
35                                  replaceStr := Replace( encloseStr, separator, CHR(0) );
36                                  -- and remove the enclosed quotes
37                                  replaceStr := Replace( replaceStr, enclosedBy );
38                                  -- change the enclosed string in the big string to the replacement string
39                                  str := Replace( str, encloseStr, replaceStr );
40                          end if;
41                  end if;
42
43                  l := Length( str );
44                  i := InStr( str, separator );
45
46                  if i = 0 then
47                          AddString( str );
48                  else
49                          AddString( SubStr( str, 1, i-1 ) );
50                          str := SubStr( str, i+1 );
51                  end if;
52
53                  -- if the separator was on the last char of the line, there is
54                  -- a trailing null column which we need to add manually
55                  if i = l then
56                          AddString( null );
57                  end if;
58
59                  exit when str is NULL;
60                  exit when i = 0;
61          end loop;
62
63          return( strList );
64 end;
65 /
Function created.
SQL>
SQL>
SQL> declare
2          ediDoc varchar2(32767) :=
3 'ISA*00*          *00*          *ZZ*043000096820   *ZZ*2156833510     *131202*0710*U*00401*000001204*0*P*>\GS*RA*043000096820*2156833510*131202*0710*1204*X*003020\ST*820*000041031\BPR*X*270*C*ACH*PPD*01*101036669***9101036669**01*031000053*DA*00000008606086714*131202\TRN*1*101036661273032\DTM*007*131202\N1*1U*BPS\N1*BE*MICHAEL      DRAYTON*34*159783633\N1*PE*BPS*ZZ*183383689C2 ABC\N1*PR*ABC TREAS 310\SE*9*000041031\ST*820*000041032\BPR*X*686*C*ACH*PPD*01*101036669***9101036669**01*031000053*DA*00000008606086714*131202\TRN*1*101036661273034\DTM*007*131202\N1*1U*BPS\N1*BE*SAMIA        GRAVES*34*892909238\N1*PE*BPS*ZZ*184545710C5 ABC\N1*PR*ABC TREAS 310\SE*9*000041032\';
4
5          lines   TStrings;
6          tokens TStrings;
7 begin
8          -- split EDI string into lines
9          lines := Tokenise( ediDoc, '\' );
10
11          -- process line and extract fields
12          for i in 3..lines.Count loop
13                  dbms_output.put_line( '***********************' ) ;
14                  dbms_output.put_line( 'line=['||lines(i)||']' );
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16
17                  for j in 1..tokens.Count loop
18                          dbms_output.put_line( to_char(j,'00')||'='||tokens(j) );
19                  end loop;
20          end loop;
21 end;
22 /
line=[ST*820*000041031]
01=ST
02=820
03=000041031
line=[BPR*X*270*C*ACH*PPD*01*101036669***9101036669**01*031000053*DA*00000008606086714*131202]
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02=X
03=270
04=C
05=ACH
06=PPD
07=01
08=101036669
09=
10=
11=9101036669
12=
13=01
14=031000053
15=DA
16=00000008606086714
17=131202
line=[TRN*1*101036661273032]
01=TRN
02=1
03=101036661273032
<snipped>

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at FileReductoin1.readFile <FileReduction1.java :110>
at FileReductoin1.actionPerformed <FileReduction1.java :71>
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1) Next time use the CODE tags. this is way too much unreadable crap.
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data = new String[numLines][];I think you want to do this..
data = new String[numLines][3];anyway that's why it's blowing up on the line
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5 6 1 6 512
6 7 1 7 512
7 8 1 8 512
8 9 1 9 512
9 10 1 10 512
10 1 2 11 512
11 2 2 12 512
12 3 2 13 512
13 4 2 14 512
14 5 2 15 512
15 6 2 16 512
16 7 2 17 512
17 8 2 18 512
18 9 2 19 512
19 10 2 20 512
20 1 3 21 512
21 2 3 22 512
22 3 3 23 512
23 4 3 24 512
24 5 3 25 512
25 6 3 26 512
26 7 3 27 512
27 8 3 28 512
28 9 3 29 512
29 10 3 30 512
30 1 4 31 512
31 2 4 32 512
32 3 4 33 512
33 4 4 34 512
34 5 4 35 512
35 6 4 36 512
36 7 4 37 512
37 8 4 38 512
38 9 4 39 512
39 10 4 40 512
40 1 5 41 512
41 2 5 42 512
42 3 5 43 512
43 4 5 44 512
44 5 5 45 512
45 6 5 46 512
46 7 5 47 512
47 8 5 48 512
48 9 5 49 512
49 10 5 50 512
50 1 6 51 512
51 2 6 52 512
52 3 6 53 512
53 4 6 54 512
54 5 6 55 512
55 6 6 56 512
56 7 6 57 512
57 8 6 58 512
58 9 6 59 512
59 10 6 60 512
60 1 7 61 512
61 2 7 62 512
62 3 7 63 512
63 4 7 64 512
64 5 7 65 512
65 6 7 66 512
66 7 7 67 512
67 8 7 68 512
68 9 7 69 512
69 10 7 70 512
70 1 8 71 512
71 2 8 72 512
What I wanna do is to read all the data above and buffer them in a queue for each user( there are only 10 users in total).
I already created a class called Class packet:
public class packet {
    private int timestamp;
    private int user_id;
    private int packet_id;
    private int packet_seqno;
    private int packet_size;
    /** Creates a new instance of packet */
    public packet(int timestamp,int user_id, int packet_id,int packet_seqno, int packet_size)
        this.timestamp = timestamp;
        this.user_id=user_id;
        this.packet_id=packet_id;
        this.packet_seqno=packet_seqno;
        this.packet_size=packet_size;
}then I wanna to create another Class called Class user which I can create a queue for each user (10 users in total) to store type packet information. the queue for each user will be in the order by timestamp.
any idea and sample code will be appreciated.

Doesn't sound too hard to me. Your class User (the convention says to capitalize class names) will have an ArrayList or Vector in it to represent the queue, and a method to store a Packet object into the List. An array or ArrayList or Vector will hold the 10 user objects. You will find the right user object from packet.user_id and call the method.
Please try to write some code yourself. You won't learn anything from having someone else write it for you. Look at sample code using ArrayList and Vector, there's plenty out there. Post in the forum again if your code turns out not to behave.

Loading a CSV file and accessing the variables

Hi guys,
I'm new to AS3 and dealt with AS2 before (just getting the grasp when the change it).
Is it possible in AS3 to load an excel .csv file into Flash using the URLLoader (or ???) and the data as variables?
I can get the .csv to load and trace the values (cell1,cell2,cell3....) but I'm not sure how to collect the data and place it into variables.
Can I just create an array and access it like so.... myArray[0], myArray[1]? If so, I'm not sure why it's not working.
I must be on the completely wrong path. Here's what I have so far....
var loader:URLLoader = new URLLoader();
loader.dataFormat = URLLoaderDataFormat.VARIABLES;
loader.addEventListener(Event.COMPLETE, dataLoaded);
var request:URLRequest = new URLRequest("population.csv");
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function dataLoaded(evt:Event):void {
var myData:Array = new Array(loader.data);
trace(myData[i]);
Thanks for any help,
Sky

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var myDate:Array = loader.data.split(",");

Loop through a csv file and return the number of rows in it?

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return the number of rows in it?
<cffile action="read" file="#filename#" output="#csvstr#"
>
<LOOP THROUGH AND COUNT ROWS>

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