ABAP Help Document(25):11.4 Data Cluster
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11.4 Data Cluster
数据集群，将一组数据存储在storage medium。
1.EXPORT
语法：
EXPORT parameter_list TO medium [COMPRESSION {ON|OFF}].
COMPRESSION是否压缩形式存储在内存；
parameter_list:
{p1 = dobj1 p2 = dobj2 ...} | {p1 FROM dobj1 p2 FROM dobj2 ...} | (ptab) ... .
建议使用=号传递数据，ptab只有两列的参数表，第一列参数名（必须字符类型），第二列参数值对象；
medium:
{ DATA BUFFER xstr }
| { INTERNAL TABLE itab }
| { MEMORY ID id }
| {
DATABASE dbtab(ar) [FROM wa] [CLIENT cl] ID id }
| { SHARED MEMORY dbtab(ar)
[FROM wa] [CLIENT cl] ID id }
| { SHARED BUFFER dbtab(ar)
[FROM wa] [CLIENT cl] ID id } ... .
id为字符型，最长60；
2.IMPORT
语法：
IMPORT parameter_list FROM medium [conversion_options].
parameter_list:
{p1 = dobj1 p2 = dobj2 ...} | {p1 TO dobj1 p2 TO dobj2 ...} | (ptab) ... .
medium:
{ DATA BUFFER xstr }
| { INTERNAL TABLE
itab }
| { MEMORY ID id }
| {
DATABASE dbtab(ar) [TO wa] [CLIENT cl] ID id }
| { SHARED MEMORY
dbtab(ar) [TO wa] [CLIENT cl] ID id }
| { SHARED BUFFER
dbtab(ar) [TO wa] [CLIENT cl] ID id } ... .
conversion_options:
{ { { {[ACCEPTING
PADDING] [ACCEPTING TRUNCATION]}
|
[IGNORING STRUCTURE BOUNDARIES] }
[IGNORING
CONVERSION ERRORS [REPLACEMENT CHARACTER rc]] }
| [IN
CHAR-TO-HEX MODE] }
[CODE
PAGE INTO cp]
[ENDIAN
INTO endian].
DATA BUFFER,INTERNAL TABLE,DATABASE支持所有options,
其他仅支持一下options:[ACCEPTING PADDING] [ACCEPTING TRUNCATION]
[IGNORING STRUCTURE BOUNDARIES]
[ACCEPTING PADDING]:支持source,target转换结构不同，target结构更复杂；
[ACCEPTING TRUNCATION]：支持source结构比target结构复杂；
[IGNORING STRUCTURE BOUNDARIES]：支持INCLUDE结构，不能和上面options同时使用；
[IN CHAR-TO-HEX MODE]:转换c到x;
[CODE PAGE INTO cp]：表TCP00，字段CPCODEPAGE，cp值；
[ENDIAN INTO endian]：大端小端，ABAP_ENDIAN类型，‘B’或‘L’
3.IMPORT DIRECTORY
语法：
IMPORT DIRECTORY INTO itab FROM DATABASE dbtab(ar) [TO wa] [CLIENT cl] ID id.
itab类型为CDIR，获取字段类型等信息；
|
NAME |
CHAR(30) |
Name of the parameter under which a data object was saved. |
|
OTYPE: |
CHAR(1) |
"F" for elementary, flat data objects, "G" for strings, "R" for flat structures, "S" for deep structures, "T" for internal tables with flat row type "C" for tables with a deep row type. |
|
FTYPE |
CHAR(1) |
DESCRIBE FIELD ... TYPE ("a", "b", "C", "D", "e", "F", "g", "I", "N", "P", "s", "T", "X", "y"). v复杂结构，h内表 |
|
TFILL |
INT4 |
已保存数据对象长度 |
|
FLENG |
INT2 |
已保存数据对象长度或已保存表行长度 |
4.FREE MEMORY
语法：
FREE MEMORY ID id.
功能和DELETE FROM MEMORY ID id一致；
5.DELETE FROM
语法：
DELETE FROM { {MEMORY
ID id}
|
{DATABASE dbtab(ar) [CLIENT cl] ID id}
|
{SHARED MEMORY dbtab(ar) [CLIENT cl] ID id}
|
{SHARED BUFFER dbtab(ar) [CLIENT cl] ID id} }.
示例：
"数据集群
FORM f_data_cluster_exp.
TYPES:BEGIN OF s_tab,
name TYPE string,
dobj TYPE string,
END OF s_tab.
DATA:lt_tab TYPE TABLE OF s_tab.
DATA:ls_tab LIKE LINE OF lt_tab.
DATA:lv_p1 TYPE string.
DATA:test1 TYPE string VALUE 'hello'.
ls_tab-name = 'P1'.
ls_tab-dobj = 'test1'.
APPEND ls_tab TO lt_tab.
"存储到data buffer
DATA:lv_xstr TYPE xstring.
EXPORT (lt_tab) TO DATA BUFFER lv_xstr.
WRITE:/ lv_xstr.
"存储到internal table
TYPES:BEGIN OF s_itab,
col1 TYPE i,
col2 TYPE x,
END OF s_itab.
DATA:lt_itab TYPE TABLE OF s_itab.
EXPORT p2 = test1 TO INTERNAL TABLE lt_itab.
"存储到memory id
EXPORT (lt_tab) TO MEMORY ID 'M_ID'.
"读取
IMPORT p1 = lv_p1 FROM MEMORY ID 'M_ID'.
WRITE:/ lv_p1.
"存储到database
"ar双字符,RELID值;
"demo_indx_table表必须有RELID,SRTF2字段
DATA:lt_spfli TYPE TABLE OF spfli.
DATA:ls_spfli LIKE LINE OF lt_spfli.
DATA:wa_indx TYPE demo_indx_table.
SELECT * FROM spfli INTO TABLE lt_spfli.
EXPORT tab = lt_spfli
TO DATABASE demo_indx_table(SQ)
FROM wa_indx
ID 'TAB'.
"读取
IMPORT tab = lt_spfli
FROM DATABASE demo_indx_table(SQ)
TO wa_indx
ID 'TAB'.
LOOP AT lt_spfli INTO ls_spfli.
WRITE:/ ls_spfli-carrid.
ENDLOOP.
"存储到shared memory,burrfer
"rsdb/esm/buffersize_kb (SHARED MEMORY)
"rsdb/obj/buffersize (SHARED BUFFER)
"memory达到最大size，需要使用DELETE FROM SHARED MEMORY
EXPORT tab = lt_spfli
TO SHARED MEMORY demo_indx_table(SQ)
FROM wa_indx
ID 'TAB_MOMO'.
"buffer会自动清空，达到最大size
EXPORT tab = lt_spfli
TO SHARED BUFFER demo_indx_table(SQ)
FROM wa_indx
ID 'TAB_BUFFER'.
"删除
DELETE FROM MEMORY ID 'M_ID'.
DELETE FROM DATABASE demo_indx_table(SQ) ID 'TAB'.
DELETE FROM SHARED MEMORY demo_indx_table(SQ) ID 'TAB_MOMO'.
DELETE FROM SHARED BUFFER demo_indx_table(SQ) ID 'TAB_BUFFER'.
ENDFORM.
6.System Class for Data Cluster
CL_ABAP_EXPIMP_MEM
CL_ABAP_EXPIMP_SHMEM
CL_ABAP_EXPIMP_SHBUF
CL_ABAP_EXPIMP_DB
CL_ABAP_EXPIMP_CONV
标签：25,Help,11.4,indx,ID,lt,tab,MEMORY,id 来源： https://www.cnblogs.com/tangToms/p/14696762.html