ABAP Grammar 2 operating table syntax

VALUE
MOVE-CORRESPONDING
CORRESPOING
FOR
REDUCE
GROUP BY
FILTER

VALUE syntax:

Structure assignment

VALUE dtype ... | # ([BASE throw] = comp1 comp2 dobj1 = dobj2 ...) ...

In the table assignment

... VALUE dtype | #( [BASE itab] ( (line1-com1 = dobj1) ( line2 ..) ... ) ...

"The table can not take the meter 
       IT_VKORG of VALUE = # (KUNNR = E_KNA1-KUNNR (VKORG = '3000') 
                                                 (VKORG = '6008')).

 lt_fieldnames = VALUE #(                          ( fieldname = '公司代码' )                          ( fieldname = '供应商编码' )                          ( fieldname = '供应商描述' )                          ( fieldname = '供应商返利值' )                          ( fieldname = '供应商余额' )                          ( fieldname = '供应商余额与返利值差额' )                          ( fieldname = '取数年月' )                          ( fieldname = '实销实结本月总金额' )                          ( fieldname = '上月累积未结算' )                          ( fieldname = '已结算金额' )                          ( fieldname = '未结算金额' )                          ( fieldname = '匹配余额' )                          ( fieldname = '铺底金额' )                          ( fieldname = '供应商库存金额' )

MOVE-CORRESPONDING语法：

CORRESPONDING Syntax: B list the values assigned to the same field of Table A

Example:

itab [...] grammar

… itab[ … ] …

Equivalent to read table itab ....

u shortcomings

If the correspondence is not found, an exception will be thrown CX_SY_ITAB_LINE_NOT_FOUND

System variable SY-SUBRC not record success

u Improved

IF line_exists ( itab[…] )

…..

ENDIF

If found by the line judge line syntax

FOR grammar

description

Enhanced version of the loop at grammar, and REDUCE, VALUE keyword used in conjunction with

grammar

…FOR i = ... [THEN expr] UNTIL | WHILE log_exp ...

…VALUE itab( FOR i = … [THEN expr] UNTIL | WHILE log_exp ... )

…REDUCE type( INIT FOR …. NEXT …..

REDUCE语法

GROUP BY语法

FELTER语法

描述

可以根据指定值(一个)或者指定内表(多个)的值过滤itab并返回itab类型的结果集

语法

FILTER type( itab [EXCEPT] [IN ftab] [USING KEY keyname ]
WHERE c1 op f1 [AND c2 op f2 [...] ] ) ...

变式

FILTER type( itab …) 对应一个值过滤

FILTER type( itab in tab …)对应多个值过滤

其它

EXCEPT如果不指定则表示满足条件的找出来，如果指定则表示不满足条件的找出来

WHERE对应过滤的条件，是必须要指定的

3. OPEN SQL

    SELECT SINGLE @ABAP_TRUE INTO @DATA(EXISTS) FROM KNA1 WHERE KUNNR EQ @I_KNA1-KUNNR.
    IF EXISTS <> ABAP_TRUE.

ENDIF.

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