ABAP Select data from SAP table PIQ_GB_UCAS_TR_HESA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_GB_UCAS_TR_HESA table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to PIQ_GB_UCAS_TR_HESA. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the PIQ_GB_UCAS_TR_HESA table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_PIQ_GB_UCAS_TR_HESA TYPE STANDARD TABLE OF PIQ_GB_UCAS_TR_HESA,
      WA_PIQ_GB_UCAS_TR_HESA TYPE PIQ_GB_UCAS_TR_HESA,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <PIQ_GB_UCAS_TR_HESA> TYPE PIQ_GB_UCAS_TR_HESA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PIQ_GB_UCAS_TR_HESA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PIQ_GB_UCAS_TR_HESA
  INTO TABLE IT_PIQ_GB_UCAS_TR_HESA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_GB_UCAS_TR_HESA
*  INTO TABLE @DATA(IT_PIQ_GB_UCAS_TR_HESA2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_PIQ_GB_UCAS_TR_HESA INDEX 1 INTO DATA(WA_PIQ_GB_UCAS_TR_HESA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PIQ_GB_UCAS_TR_HESA ASSIGNING <PIQ_GB_UCAS_TR_HESA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_GB_UCAS_TR_HESA>-GCEASN = 1.
<PIQ_GB_UCAS_TR_HESA>-GCEASTS = 1.
<PIQ_GB_UCAS_TR_HESA>-VCEASN = 1.
<PIQ_GB_UCAS_TR_HESA>-VCEASTS = 1.
<PIQ_GB_UCAS_TR_HESA>-GCEAN = 1.

ENDLOOP.

LOOP AT IT_PIQ_GB_UCAS_TR_HESA INTO WA_PIQ_GB_UCAS_TR_HESA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_GB_UCAS_TR_HESA-GCEATS, sy-vline,
  WA_PIQ_GB_UCAS_TR_HESA-VCEAN, sy-vline,
  WA_PIQ_GB_UCAS_TR_HESA-VCEATS, sy-vline,
  WA_PIQ_GB_UCAS_TR_HESA-KSQN, sy-vline,
  WA_PIQ_GB_UCAS_TR_HESA-KSQTS, sy-vline,
  WA_PIQ_GB_UCAS_TR_HESA-UKSAN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_GB_UCAS_TR_HESA you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_PIQ_GB_UCAS_TR_HESA TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_PIQ_GB_UCAS_TR_HESA INTO WA_PIQ_GB_UCAS_TR_HESA.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PIQ_GB_UCAS_TR_HESA_STR, 
GCEASN TYPE STRING,
GCEASTS TYPE STRING,
VCEASN TYPE STRING,
VCEASTS TYPE STRING,
GCEAN TYPE STRING,
GCEATS TYPE STRING,
VCEAN TYPE STRING,
VCEATS TYPE STRING,
KSQN TYPE STRING,
KSQTS TYPE STRING,
UKSAN TYPE STRING,
UKSATS TYPE STRING,
SAHN TYPE STRING,
SAHTS TYPE STRING,
SHN TYPE STRING,
SHTS TYPE STRING,
SI2N TYPE STRING,
SI2TS TYPE STRING,
SSGCN TYPE STRING,
SSGCTS TYPE STRING,
SCSN TYPE STRING,
SCSTS TYPE STRING,
AEAN TYPE STRING,
AEANTS TYPE STRING,
TOTALTS TYPE STRING,
CACHEN TYPE STRING,
CACHETS TYPE STRING,
BTECN TYPE STRING,
BTECTS TYPE STRING,
IBTS TYPE STRING,
ILCTS TYPE STRING,
MDPATS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_GB_UCAS_TR_HESA_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_PIQ_GB_UCAS_TR_HESA_STR-GCEASN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-GCEASTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-VCEASN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-VCEASTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-GCEAN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-GCEATS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-VCEAN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-VCEATS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-KSQN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-KSQTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-UKSAN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-UKSATS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SAHN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SAHTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SHN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SHTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SI2N sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SI2TS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SSGCN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SSGCTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SCSN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-SCSTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-AEAN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-AEANTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-TOTALTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-CACHEN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-CACHETS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-BTECN sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-BTECTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-IBTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-ILCTS sy-vline 
WA_PIQ_GB_UCAS_TR_HESA_STR-MDPATS sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.