ABAP Select data from SAP table MMDA_PUR_S_PUR_C01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMDA_PUR_S_PUR_C01 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 MMDA_PUR_S_PUR_C01. 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 MMDA_PUR_S_PUR_C01 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_MMDA_PUR_S_PUR_C01 TYPE STANDARD TABLE OF MMDA_PUR_S_PUR_C01,
      WA_MMDA_PUR_S_PUR_C01 TYPE MMDA_PUR_S_PUR_C01,
      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: <MMDA_PUR_S_PUR_C01> TYPE MMDA_PUR_S_PUR_C01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MMDA_PUR_S_PUR_C01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MMDA_PUR_S_PUR_C01
  INTO TABLE IT_MMDA_PUR_S_PUR_C01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMDA_PUR_S_PUR_C01
*  INTO TABLE @DATA(IT_MMDA_PUR_S_PUR_C012).
*--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_MMDA_PUR_S_PUR_C01 INDEX 1 INTO DATA(WA_MMDA_PUR_S_PUR_C012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MMDA_PUR_S_PUR_C01 ASSIGNING <MMDA_PUR_S_PUR_C01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMDA_PUR_S_PUR_C01>-CALDAY = 1.
<MMDA_PUR_S_PUR_C01>-CALMONTH = 1.
<MMDA_PUR_S_PUR_C01>-CALWEEK = 1.
<MMDA_PUR_S_PUR_C01>-FISCPER = 1.
<MMDA_PUR_S_PUR_C01>-FISCVARNT = 1.

ENDLOOP.

LOOP AT IT_MMDA_PUR_S_PUR_C01 INTO WA_MMDA_PUR_S_PUR_C01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMDA_PUR_S_PUR_C01-DOC_DATE, sy-vline,
  WA_MMDA_PUR_S_PUR_C01-COUNTRY, sy-vline,
  WA_MMDA_PUR_S_PUR_C01-INFO_REC, sy-vline,
  WA_MMDA_PUR_S_PUR_C01-INFO_TYPE, sy-vline,
  WA_MMDA_PUR_S_PUR_C01-MATERIAL, sy-vline,
  WA_MMDA_PUR_S_PUR_C01-MATL_GROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMDA_PUR_S_PUR_C01 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_MMDA_PUR_S_PUR_C01 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_MMDA_PUR_S_PUR_C01 INTO WA_MMDA_PUR_S_PUR_C01.


*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 PERI6, internal->external for field CALMONTH
CALL FUNCTION 'CONVERSION_EXIT_PERI6_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-CALMONTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-CALMONTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI6, internal->external for field CALWEEK
CALL FUNCTION 'CONVERSION_EXIT_PERI6_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-CALWEEK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-CALWEEK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-FISCPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INFO_REC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-INFO_REC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-INFO_REC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VENDOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-VENDOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-VENDOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-VERSION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMDA_PUR_S_PUR_C01-BASE_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMDA_PUR_S_PUR_C01-BASE_UOM.
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_MMDA_PUR_S_PUR_C01_STR, 
CALDAY TYPE STRING,
CALMONTH TYPE STRING,
CALWEEK TYPE STRING,
FISCPER TYPE STRING,
FISCVARNT TYPE STRING,
DOC_DATE TYPE STRING,
COUNTRY TYPE STRING,
INFO_REC TYPE STRING,
INFO_TYPE TYPE STRING,
MATERIAL TYPE STRING,
MATL_GROUP TYPE STRING,
PURCH_ORG TYPE STRING,
REVERSEDOC TYPE STRING,
VENDOR TYPE STRING,
VERSION TYPE STRING,
VTYPE TYPE STRING,
CT_FLG TYPE STRING,
PLANT TYPE STRING,
GR_RE_IND TYPE STRING,
DELIVERIES TYPE STRING,
DEL_DT_VR1 TYPE STRING,
DEL_DT_VR2 TYPE STRING,
DEL_DT_VR3 TYPE STRING,
DEL_DT_VR4 TYPE STRING,
DEL_DT_VR5 TYPE STRING,
QTY_DEV_1 TYPE STRING,
QTY_DEV_2 TYPE STRING,
QTY_DEV_3 TYPE STRING,
QTY_DEV_4 TYPE STRING,
QTY_DEV_5 TYPE STRING,
IR_VAL_RET TYPE STRING,
WTDDELTIME TYPE STRING,
EFF_VAL_RE TYPE STRING,
GR_VAL TYPE STRING,
GR_VAL_PD TYPE STRING,
INV_RC_QTY TYPE STRING,
INV_RC_VAL TYPE STRING,
GR_QTY TYPE STRING,
GR_QTY_RET TYPE STRING,
GR_QTY_WDT TYPE STRING,
GR_VAL_R_P TYPE STRING,
INVCD_AMNT TYPE STRING,
IR_QTY_RET TYPE STRING,
IR_QTY_R_P TYPE STRING,
IR_VAL_R_P TYPE STRING,
IV_REC_QTY TYPE STRING,
ORDER_VAL TYPE STRING,
TAR_DL_QTY TYPE STRING,
PO_QTY_RET TYPE STRING,
CONTR_ITEM TYPE STRING,
DEL_SCHEDS TYPE STRING,
PO_ITEMLNS TYPE STRING,
PO_ITEMS TYPE STRING,
PO_QTY TYPE STRING,
QUOT_ITEMS TYPE STRING,
RFQ_ITEMS TYPE STRING,
SCH_AGR_IT TYPE STRING,
TOTDELTIME TYPE STRING,
BASE_UOM TYPE STRING,
LOC_CURRCY TYPE STRING,
TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMDA_PUR_S_PUR_C01_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_MMDA_PUR_S_PUR_C01_STR-CALDAY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-CALMONTH sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-CALWEEK sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-FISCPER sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-FISCVARNT sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DOC_DATE sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-COUNTRY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-INFO_REC sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-INFO_TYPE sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-MATERIAL sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-MATL_GROUP sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-PURCH_ORG sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-REVERSEDOC sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-VENDOR sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-VERSION sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-VTYPE sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-CT_FLG sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-PLANT sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_RE_IND sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DELIVERIES sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DEL_DT_VR1 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DEL_DT_VR2 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DEL_DT_VR3 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DEL_DT_VR4 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DEL_DT_VR5 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-QTY_DEV_1 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-QTY_DEV_2 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-QTY_DEV_3 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-QTY_DEV_4 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-QTY_DEV_5 sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-IR_VAL_RET sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-WTDDELTIME sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-EFF_VAL_RE sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_VAL sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_VAL_PD sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-INV_RC_QTY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-INV_RC_VAL sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_QTY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_QTY_RET sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_QTY_WDT sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-GR_VAL_R_P sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-INVCD_AMNT sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-IR_QTY_RET sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-IR_QTY_R_P sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-IR_VAL_R_P sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-IV_REC_QTY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-ORDER_VAL sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-TAR_DL_QTY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-PO_QTY_RET sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-CONTR_ITEM sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-DEL_SCHEDS sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-PO_ITEMLNS sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-PO_ITEMS sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-PO_QTY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-QUOT_ITEMS sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-RFQ_ITEMS sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-SCH_AGR_IT sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-TOTDELTIME sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-BASE_UOM sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-LOC_CURRCY sy-vline 
WA_MMDA_PUR_S_PUR_C01_STR-TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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