EssReport

Sends a report specification to the active database as a single string. This function is equivalent to making a call to EssBeginReport(), followed by calls to EssSendString() and finally EssEndReport(). The report data can either be output, or the report specification can just be verified and any errors returned. Also, the corresponding data blocks in the database can optionally be locked by this call (lock for update).

Syntax

ESS_FUNC_M  EssReport (hCtx, Output, Lock, RptSpec);

Parameter	Data Type	Description
hCtx	ESS_HCTX_T	API context handle.
Output	ESS_BOOL_T	Controls output of data. If TRUE, data is output from the server, according to the specified report. If FALSE, no data is output.
Lock	ESS_BOOL_T	Controls block locking. If TRUE, all blocks which are accessed by the report specification are locked for update. If FALSE, no blocks are locked.
RptSpec	ESS_STR_T	The report specification, as a single string (must be less than 64 KB)..

Notes

The report specification string must be less than 64 KB long.
If this function causes data to be output (Output flag is TRUE), the returned data must be read by calling EssGetString() until a NULL is returned.
If this function causes blocks to be locked (Lock flag is TRUE), the caller is responsible for unlocking the locked blocks (e.g. by calling EssUpdate() with the Unlock flag set to TRUE).
If both the Output and Lock flags are set to FALSE, the database merely performs a syntax check of the report specification.

Return Value

None.

Access

This function requires the caller to have read privilege (ESS_PRIV_READ) to one or more members in the active database. Any members that the caller does not have access to will be returned as missing.

Example

ESS_FUNC_M
ESS_ReportLine (ESS_HCTX_T       hCtx,
                ESS_HINST_T  hInst
               )
{
   ESS_FUNC_M       sts = ESS_STS_NOERR;
   ESS_STR_T     rString;
   
   sts = EssReport (hCtx, ESS_TRUE, ESS_FALSE,
         "<Desc Year !");
   /******************
    * Get the report *
    ******************/
   
   if (!sts)
      sts = EssGetString (hCtx, &rString);
   while ((!sts) && (rString != NULL))
   {
         printf ("%s", rString);
      EssFree (hInst, rString);
      sts = EssGetString (hCtx, &rString);
   }
   printf ("\r\n");
   
   return (sts);
}