Solution
We suggest you use the function module /guixt/dbselect, since it provides a flexible and efficient way to read data from an SAP table.

Example
In an input field the user can enter a country code directly or select it from a list via F4. In each case we display the country name:

InputField (1,1) "Country" (1,20) size=2 _
    techname="KNA1-LAND1" name="country" -uppercase

GuiXT Script

InputField (1,1) "Country" (1,20) size=2 _
   techname="KNA1-LAND1" name="country" -uppercase

// display country name
Clear V[country_name]

// country code specified?
if V[country]

  // Clear result table (important for performance reasons)
  Clear text[r]

  Call /guixt/dbselect _
    cache="session" _ // use cache="session" to save RFC calls
     in.table="T005T" _
     in.condition="LAND1 = '&V[country]' and SPRAS = '&V[_language]' " _
     in.fields="LANDX" _
     table.values="r"

  // copy country name
  CopyText fromText="r" toString="country_name" line=1

Text (1,26) "&V[country_name]"

Remarks

• Always clear the result variable (here: "r") before executing the call. Otherwise the result table from the previous call - which might be large - is imported to the function
• Use cache="..." if appropriate. For many text tables cache="session" makes sense
  
  

Syntax errors/typos in the SQL parameters
If you have any typos or syntax errors in the table name, condition or in the field list, the SAP system generates an ABAP dump that you can examine with transaction ST22.

Example:

We use the wrong column name "LANGU" instead of "SPRAS":

... in.condition="LAND1 = '&V[country]' and LANGU = '&V[_language]' "

 An error popup comes up:

Display the ABAP short dump via transaction ST22 and look at the "Error analysis" text:



 

Components
InputAssistant