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From: Anton de Wet <adw@obsidian.co.za> 

Subject: [HACKERS] Small patch to pgtclCmds.c

Hi I have made the following small change to the extensions I made to
pgtclCmds.c quite a while ago.

At the moment there is a -assignbyidx option to pg_result assigning the
returned tuples to an array by using the 1st field of the select statement
as the key to the array.
eg "select name,age from vitalstatistics" will result in an array with

myarray(peter) = 32
myarray(paul)  = 45

Often I need to have a pseudo-multi dimentional
array eg. "select name,age from vitalstatistics where occupation='plummer'

I would like to be able to generate an array
newarray(peter,overpaid) = 32

So to add a arbitrary string to the key value I have extended

  pg_result $res -assignbyidx $arrayname

to have an optional argument

  pg_result $res -assignbyidx $arrayname $appendstr

So that that string is appended to the key value.
This commit is contained in:
Marc G. Fournier 1997-04-02 18:16:49 +00:00
parent 5b1311acfb
commit 17b5bd33e4
1 changed files with 16 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
src/interfaces/libpgtcl/pgtclCmds.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclCmds.c,v 1.12 1997/01/23 19:47:18 scrappy Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclCmds.c,v 1.13 1997/04/02 18:16:49 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -437,8 +437,10 @@ Pg_exec(ClientData cData, Tcl_Interp *interp, int argc, char* argv[])
the connection that produced the result
-assign arrayName
assign the results to an array
-assignbyidx arrayName
-assignbyidx arrayName ?appendstr?
assign the results to an array using the first field as a key
optional appendstr append that string to the key name. Usefull for
creating pseudo-multi dimentional arrays in tcl.
-numTuples
the number of tuples in the query
-attributes
@ -462,9 +464,10 @@ Pg_result(ClientData cData, Tcl_Interp *interp, int argc, char* argv[])
int tupno;
char prearrayInd[MAX_MESSAGE_LEN];
char arrayInd[MAX_MESSAGE_LEN];
char *appendstr;
char *arrVar;
if (argc != 3 && argc != 4) {
if (argc != 3 && argc != 4 && argc != 5) {
Tcl_AppendResult(interp, "Wrong # of arguments\n",0);
goto Pg_result_errReturn;
}
@ -523,18 +526,24 @@ Pg_result(ClientData cData, Tcl_Interp *interp, int argc, char* argv[])
return TCL_OK;
}
else if (strcmp(opt, "-assignbyidx") == 0) {
if (argc != 4) {
Tcl_AppendResult(interp, "-assignbyidx option must be followed by a variable name",0);
if (argc !=4 && argc != 5) {
Tcl_AppendResult(interp, "-assignbyidx requires the array name and takes one optional argument as an append string",0);
return TCL_ERROR;
}
arrVar = argv[3];
/* this assignment assigns the table of result tuples into a giant
array with the name given in the argument,
the indices of the array or (tupno,attrName)*/
if (argc == 5) {
appendstr = argv[4];
} else {
appendstr = "";
}
for (tupno = 0; tupno<PQntuples(result); tupno++) {
sprintf(prearrayInd,"%s",PQgetvalue(result,tupno,0));
for (i=1;i<PQnfields(result);i++) {
sprintf(arrayInd, "%s,%s", prearrayInd, PQfname(result,i));
sprintf(arrayInd, "%s,%s%s", prearrayInd, PQfname(result,i),
appendstr);
Tcl_SetVar2(interp, arrVar, arrayInd,
PQgetvalue(result,tupno,i),
TCL_LEAVE_ERR_MSG);
@ -604,7 +613,7 @@ Pg_result(ClientData cData, Tcl_Interp *interp, int argc, char* argv[])
"\t-status\n",
"\t-conn\n",
"\t-assign arrayVarName\n",
"\t-assignbyidx arrayVarName\n",
"\t-assignbyidx arrayVarName ?appendstr?\n",
"\t-numTuples\n",
"\t-attributes\n"
"\t-lAttributes\n"