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| Pro*COBOL Dynamic SQL How to get data length of a VARCHAR2 column [message #653905] |
Thu, 21 July 2016 22:52  |
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hui shen
Messages: 15
Registered: July 2016
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Junior Member |
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Hi experts
I am using procob dynamic sql to execute a sql query statement, but i could not find a way to get real data length value of a VARCHAR2 column.
For example:
CREATE TABLE TESTAB(CCC VARCHAR2(10));
INSERT INTO TESTAAB VALUES('1234');
Currently, the procob dynamic sql ("SELECT * FROM TESTTAB")can let me retrieve the column metadata information, e.g., column name ("CCC"), column datatype("VARCHAR2"), and max column length (10);
and can also fetch out the data ("1234"), but i could not find a way to get the data length.
1. define SELDSC
01 SELDSC.
02 SQLDNUM PIC S9(9) COMP-5 VALUE 20.
02 SQLDFND PIC S9(9) COMP-5.
02 SELDVAR OCCURS 20 TIMES.
03 SELDV PIC S9(18) COMP-5.
03 SELDFMT PIC S9(18) COMP-5.
03 SELDVLN PIC S9(9) COMP-5.
03 SELDFMTL PIC S9(4) COMP-5.
03 SELDVTYP PIC S9(4) COMP-5.
03 SELDI PIC S9(18) COMP-5.
03 SELDH-VNAME PIC S9(18) COMP-5.
03 SELDH-MAX-VNAMEL PIC S9(4) COMP-5.
03 SELDH-CUR-VNAMEL PIC S9(4) COMP-5.
03 SELDFILL1 PIC S9(9) COMP-5.
03 SELDI-VNAME PIC S9(18) COMP-5.
03 SELDI-MAX-VNAMEL PIC S9(4) COMP-5.
03 SELDI-CUR-VNAMEL PIC S9(4) COMP-5.
03 SELDFILL2 PIC S9(9) COMP-5.
03 SELDFCLP PIC S9(18) COMP-5.
03 SELDFCRCP PIC S9(18) COMP-5.
01 XSELDI.
03 SEL-DI OCCURS 20 TIMES PIC S9(4) COMP-5.
01 XSELDIVNAME.
03 SEL-DI-VNAME OCCURS 20 TIMES PIC X(80).
01 XSELDV.
03 SEL-DV OCCURS 20 TIMES PIC X(80).
01 XSELDHVNAME.
03 SEL-DH-VNAME OCCURS 20 TIMES PIC X(80).
2. bind buffer
CALL "SQLADR" USING SEL-DV(COLUMN-INDEX) SELDV(COLUMN-INDEX).
MOVE "SELECT * FROM TESTTAB" TO DYN-STATEMENT.
EXEC SQL PREPARE S1 FROM :DYN-STATEMENT END-EXEC.
EXEC SQL DECLARE C1 CURSOR FOR S1 END-EXEC.
EXEC SQL OPEN C1 END-EXEC.
EXEC SQL DESCRIBE SELECT LIST FOR S1 INTO SELDSC END-EXEC.
3. fetch data row
EXEC SQL FETCH C1 USING DESCRIPTOR SELDSC END-EXEC.
4. finally
buffer SEL-DV was filled with "ABCD ", there is 6-spaced appended. there is no way to get the real data length(in this case, it's 4).
Because i cannot distinguish whether the append white space is part of data content or not.
Thanks.
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Current Time: Wed Apr 24 14:03:04 CDT 2024
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