ABAP Select data from SAP table /SAPAPO/CRES_LC_HEAD into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/CRES_LC_HEAD 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 /SAPAPO/CRES_LC_HEAD. 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 /SAPAPO/CRES_LC_HEAD 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_/SAPAPO/CRES_LC_HEAD TYPE STANDARD TABLE OF /SAPAPO/CRES_LC_HEAD,
      WA_/SAPAPO/CRES_LC_HEAD TYPE /SAPAPO/CRES_LC_HEAD,
      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: </SAPAPO/CRES_LC_HEAD> TYPE /SAPAPO/CRES_LC_HEAD.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/CRES_LC_HEAD
  INTO TABLE IT_/SAPAPO/CRES_LC_HEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CRES_LC_HEAD
*  INTO TABLE @DATA(IT_/SAPAPO/CRES_LC_HEAD2).
*--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_/SAPAPO/CRES_LC_HEAD INDEX 1 INTO DATA(WA_/SAPAPO/CRES_LC_HEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/CRES_LC_HEAD ASSIGNING </SAPAPO/CRES_LC_HEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CRES_LC_HEAD>-TYPE = 1.
</SAPAPO/CRES_LC_HEAD>-BUFFERTIME = 1.
</SAPAPO/CRES_LC_HEAD>-BUFFERTIME_UNIT = 1.
</SAPAPO/CRES_LC_HEAD>-FINITE_PLANNING = 1.
</SAPAPO/CRES_LC_HEAD>-IS_BOTTLENECK = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/CRES_LC_HEAD INTO WA_/SAPAPO/CRES_LC_HEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CRES_LC_HEAD-MIN_GAPS, sy-vline,
  WA_/SAPAPO/CRES_LC_HEAD-OVERLOAD, sy-vline,
  WA_/SAPAPO/CRES_LC_HEAD-OVERLAP_BUCKETS, sy-vline,
  WA_/SAPAPO/CRES_LC_HEAD-START_ON_GRID, sy-vline,
  WA_/SAPAPO/CRES_LC_HEAD-MIN_OVERLAP, sy-vline,
  WA_/SAPAPO/CRES_LC_HEAD-MIN_OVERLAP_UNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CRES_LC_HEAD 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_/SAPAPO/CRES_LC_HEAD 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_/SAPAPO/CRES_LC_HEAD INTO WA_/SAPAPO/CRES_LC_HEAD.


*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.

*Conversion exit CUNIT, internal->external for field BUFFERTIME_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CRES_LC_HEAD-BUFFERTIME_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CRES_LC_HEAD-BUFFERTIME_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MIN_OVERLAP_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CRES_LC_HEAD-MIN_OVERLAP_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CRES_LC_HEAD-MIN_OVERLAP_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BR_QUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CRES_LC_HEAD-BR_QUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CRES_LC_HEAD-BR_QUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BR_TUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CRES_LC_HEAD-BR_TUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CRES_LC_HEAD-BR_TUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field STORAGE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CRES_LC_HEAD-STORAGE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CRES_LC_HEAD-STORAGE_UNIT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_/SAPAPO/CRES_LC_HEAD_STR, 
TYPE TYPE STRING,
BUFFERTIME TYPE STRING,
BUFFERTIME_UNIT TYPE STRING,
FINITE_PLANNING TYPE STRING,
IS_BOTTLENECK TYPE STRING,
MIN_GAPS TYPE STRING,
OVERLOAD TYPE STRING,
OVERLAP_BUCKETS TYPE STRING,
START_ON_GRID TYPE STRING,
MIN_OVERLAP TYPE STRING,
MIN_OVERLAP_UNIT TYPE STRING,
MATRIX_ID TYPE STRING,
TZONE TYPE STRING,
TAKTS TYPE STRING,
BR_QUANT TYPE STRING,
BR_QUNIT TYPE STRING,
BR_TIME TYPE STRING,
BR_TUNIT TYPE STRING,
RITT_FLG TYPE STRING,
SYNC_START TYPE STRING,
SYNC_COMPATIBLE TYPE STRING,
DIM_STORAGE TYPE STRING,
MIN_STORAGE TYPE STRING,
MAX_STORAGE TYPE STRING,
MIN_REPLENISHMNT TYPE STRING,
STORAGE_UNIT TYPE STRING,
MIX_PLAN_TYPE TYPE STRING,
CAMPAIGN_PPDS TYPE STRING,
STORAGE_TO_ZERO TYPE STRING,
FINITY_LEVEL TYPE STRING,
MULTIPLE_PRODUCT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CRES_LC_HEAD_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_/SAPAPO/CRES_LC_HEAD_STR-TYPE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-BUFFERTIME sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-BUFFERTIME_UNIT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-FINITE_PLANNING sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-IS_BOTTLENECK sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MIN_GAPS sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-OVERLOAD sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-OVERLAP_BUCKETS sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-START_ON_GRID sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MIN_OVERLAP sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MIN_OVERLAP_UNIT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MATRIX_ID sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-TZONE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-TAKTS sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-BR_QUANT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-BR_QUNIT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-BR_TIME sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-BR_TUNIT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-RITT_FLG sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-SYNC_START sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-SYNC_COMPATIBLE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-DIM_STORAGE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MIN_STORAGE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MAX_STORAGE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MIN_REPLENISHMNT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-STORAGE_UNIT sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MIX_PLAN_TYPE sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-CAMPAIGN_PPDS sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-STORAGE_TO_ZERO sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-FINITY_LEVEL sy-vline 
WA_/SAPAPO/CRES_LC_HEAD_STR-MULTIPLE_PRODUCT sy-vline      INTO ld_text SEPARATED BY SPACE.

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