Re: How do I clip a vary length field?

Sorry Chris - my brain doesn't always syntax check my code.

The simple fix is to declare and initialize the basing pointer. So code this:

Dcl-s pEZDQLSTL pointer inz( %Addr( EZDQLSTL ) );

Dcl-s SQLStuff VarChar(32000: 4) Based( pEZDQLSTL ); // Length can be anything up to 16Mb

Note that you MUST use the address of EZDQLSTL (not EZDSQLST00) as the base for the varying field.

The layout of a Varying:4 field is bytes 1 - 4 contain the active length of the field (in other words EZDQLSTL) and the data starts in byte 5 (i.e. EZDSQLST00 and subsequent bytes).

On Dec 11, 2019, at 7:26 AM, Chris Holko <christopherholko@xxxxxxxxx> wrote:

One more follow up.

%addr cannot be used as a parameter within BASED, that results in a RNF3453 - The parameter for keyword BASED is not valid.

So that I understand what is being stated, the 32000:4 puts the 32k variable at position 4 not he variable it is based upon?


So cut from copy book, see below, could I simply do the following? My difficulty in RPGLE has always been declaration of variables.

dcl-s sqlstuff varchar(32000) based(EZDSQLST00);



Copy book cut out.

D EZDLECN 113 116I 0
D* Length of ext'd cursor @B2A
D EZDRSV2 117 234
D* Res. for future use @B2C
D EZDQLSTL 235 238I 0
D* Length of SQL Stmt text@A1A
D*EZDSQLST00 239 239
D*
D* Varying length
D* /* SQL statement text @B2C

On Dec 9, 2019, at 11:49 AM, Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

Having looked at the source file I'm even more confused.

EZDQLSTL is an Int(10) containing the length of the SQL statement.

Not sure where the data itself is from the source but it looks like it may follow EZDQLSTL.

If that is the case then what you need is:

Dcl-s SQLStuff VarChar(32000: 4) Based( %Addr( EZDQLSTL ) ); // Length can be anything up to 16Mb

Dcl-s Upper Varchar(1024);

Upper = SQLStuff; // This will truncate to 1024 if needed.

I _think_ this is what you need but without knowing why you are upper casing stuff etc I'm guessing. But if the data follows the count then this should work.

Note the _4_ in the VarChar definition - the supplied length is 4 bytes so you have to ensure the definition matches.

On Dec 9, 2019, at 10:02 AM, C Holko <christopherholko@xxxxxxxxx> wrote:

So, I have this
XSql1024 S 9216 Varying
Based(SqlPtr)

Upper S Like(XSQL1024)

and later some code does
SqlPtr = %addr(EZDQLSTL) + 2
Upper = XSQL1024

The EZ* fields are from QSYSINC/QRPGLESRC EZDAEP coming in the exit
QIBM_QZDA_SQL2

I need to clip XSQL1024 so it will always fit in Upper. I am getting SQL
strings in excess of 9k.

What are my options?
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