ABAP Select data from SAP table CCHMAMTSQ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CCHMAMTSQ 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 CCHMAMTSQ. 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 CCHMAMTSQ 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_CCHMAMTSQ TYPE STANDARD TABLE OF CCHMAMTSQ,
      WA_CCHMAMTSQ TYPE CCHMAMTSQ,
      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: <CCHMAMTSQ> TYPE CCHMAMTSQ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCHMAMTSQ
*  INTO TABLE @DATA(IT_CCHMAMTSQ2).
*--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_CCHMAMTSQ INDEX 1 INTO DATA(WA_CCHMAMTSQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCHMAMTSQ>-MANDT = 1.
<CCHMAMTSQ>-CHEMICALUUID = 1.
<CCHMAMTSQ>-GHSHAZARDCLASSCATEGORY = 1.
<CCHMAMTSQ>-LISTEDSUBSTANCEUUID = 1.
<CCHMAMTSQ>-MATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCHMAMTSQ-MATERIALBASEUNIT, sy-vline,
  WA_CCHMAMTSQ-PLANT, sy-vline,
  WA_CCHMAMTSQ-STORAGELOCATION, sy-vline,
  WA_CCHMAMTSQ-ENDDATE, sy-vline,
  WA_CCHMAMTSQ-MATLWRHSSTKQTYINMATLBASEUNIT, sy-vline,
  WA_CCHMAMTSQ-AVGSTOCKNETWEIGHT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCHMAMTSQ 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_CCHMAMTSQ 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_CCHMAMTSQ INTO WA_CCHMAMTSQ.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CCHMAMTSQ-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCHMAMTSQ-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CCHMAMTSQ-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCHMAMTSQ-UNITOFMEASURE.
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_CCHMAMTSQ_STR, 
MANDT TYPE STRING,
CHEMICALUUID TYPE STRING,
GHSHAZARDCLASSCATEGORY TYPE STRING,
LISTEDSUBSTANCEUUID TYPE STRING,
MATERIAL TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
PLANT TYPE STRING,
STORAGELOCATION TYPE STRING,
ENDDATE TYPE STRING,
MATLWRHSSTKQTYINMATLBASEUNIT TYPE STRING,
AVGSTOCKNETWEIGHT TYPE STRING,
MAXSTOCKNETWEIGHT TYPE STRING,
MINSTOCKNETWEIGHT TYPE STRING,
NUMBEROFCHEMICALS TYPE STRING,
UNITOFMEASURE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCHMAMTSQ_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_CCHMAMTSQ_STR-MANDT sy-vline 
WA_CCHMAMTSQ_STR-CHEMICALUUID sy-vline 
WA_CCHMAMTSQ_STR-GHSHAZARDCLASSCATEGORY sy-vline 
WA_CCHMAMTSQ_STR-LISTEDSUBSTANCEUUID sy-vline 
WA_CCHMAMTSQ_STR-MATERIAL sy-vline 
WA_CCHMAMTSQ_STR-MATERIALBASEUNIT sy-vline 
WA_CCHMAMTSQ_STR-PLANT sy-vline 
WA_CCHMAMTSQ_STR-STORAGELOCATION sy-vline 
WA_CCHMAMTSQ_STR-ENDDATE sy-vline 
WA_CCHMAMTSQ_STR-MATLWRHSSTKQTYINMATLBASEUNIT sy-vline 
WA_CCHMAMTSQ_STR-AVGSTOCKNETWEIGHT sy-vline 
WA_CCHMAMTSQ_STR-MAXSTOCKNETWEIGHT sy-vline 
WA_CCHMAMTSQ_STR-MINSTOCKNETWEIGHT sy-vline 
WA_CCHMAMTSQ_STR-NUMBEROFCHEMICALS sy-vline 
WA_CCHMAMTSQ_STR-UNITOFMEASURE sy-vline      INTO ld_text SEPARATED BY SPACE.

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