fix: prevent grid queries from doing "WHERE intcol::text = 1", due to "1" being incompatible to the text value on the left

Refs #2499

Author: ansgarbecker

source/dbconnection.pas

@@ -10845,8 +10845,9 @@ function TTableColumn.CastAsText: String;
         Result := 'CAST('+Result+' AS NVARCHAR('+IntToStr(GRIDMAXDATA)+'))';
     end;
     ngPgSQL: begin
-      // Cast *any* datatype, including VARCHAR and TEXT, which may have an [] array attribute
-      Result := Result + '::text';
+      // Cast most datatypes, including VARCHAR and TEXT, which may have an [] array attribute
+      if not (DataType.Category in [dtcInteger, dtcReal]) then
+        Result := Result + '::text';
     end;
   end;
 end;