APPEND INITIAL LINE 向内表中插入空行追加数据

APPEND INITIAL LINE TO lt_tab_new ASSIGNING FIELD-SYMBOL().

SELECT SINGLE * FROM zudi_master INTO @DATA(ls_test). APPEND INITIAL LINE TO udi_master ASSIGNING FIELD-SYMBOL(). MOVE-CORRESPONDING ls_test TO . APPEND INITIAL LINE TO udi_mapp_in ASSIGNING FIELD-SYMBOL(). MOVE-CORRESPONDING ls_test TO .

https://help.sap.com/doc/abapdocu_750_index_htm/7.50/en-US/abapappend_linespec.htm

DATA itab TYPE TABLE OF spfli.FIELD-SYMBOLS LIKE LINE OF itab.APPEND INITIAL LINE TO itab ASSIGNING .-carrid = '...'....

语法：

SAP NetWeaver AS ABAP Release 750, ©Copyright 2016 SAP AG. All rights reserved.ABAP - Keyword Documentation → ABAP - Reference → Processing Internal Data → Internal Tables → Processing Statements for Internal Tables → APPEND → APPEND - line_specQuick ReferenceSyntax... wa | {INITIAL LINE} | {LINES OF jtab [FROM idx1] [TO idx2] [USING KEY keyname]} ...Alternatives:1. ... wa2. ... INITIAL LINE3. ... LINES OF jtab [FROM idx1] [TO idx2] [USING KEY keyname]EffectEither a work area wa, an initial row INITIAL LINE, or multiple rows of an internal table jtab can be appended.Alternative 1... waEffectA new row is appended to which the content of the work area wa is assigned. wa is a general expression position. wa may be incompatible with the row type of the internal table and, if necessary, is converted to the row type in accordance with the conversion rules. If a conversion error occurs here, the exception cannot be handled using CX_SY_CONVERSION_ERROR and the associated runtime error occurs instead. If an arithmetic expression is specified for wa, the row type of the internal table is respected when determining the calculation type.Notes If a conflict occurs with an existing unique primary table type, this raises a non-handleable exception when appending a single row. In the case of a conflict with a unique secondary table key, a handleable exception of the class CX_SY_ITAB_DUPLICATE_KEY is raised. Specifying a calculation expression for wa is usually only a good idea for elementary row types. With the exception, an obsolete short form is possible where wa TO can be omitted, if the internal table has a header line itab with the same name. The statement then uses the header line as the work area implicitly.ExampleAppending square numbers to a sorted table with elementary row type.DATA: int TYPE i, itab LIKE SORTED TABLE OF int WITH UNIQUE KEY table_line.DO 10 TIMES. int = sy-index ** 2. APPEND int TO itab.ENDDO.Alternative 2... INITIAL LINEEffectA new row is added in which every component contains the type-friendly initial value.ExampleAttaching an initial row which is also linked to a field symbol by the ASSIGNING addition. This means that initial rows can be processed directly.DATA itab TYPE TABLE OF spfli.FIELD-SYMBOLS LIKE LINE OF itab.APPEND INITIAL LINE TO itab ASSIGNING .-carrid = '...'....Alternative 3... LINES OF jtab [FROM idx1] [TO idx2] [USING KEY keyname]EffectThe rows of an internal table jtab are added as a block. jtab is a functional operand position.The inserted rows are sequentially taken from the table jtab. The row type of jtab can be incompatible with the row type of the internal table itab and it is converted to the row type of the target table (if necessary), in accordance with the conversion rules. If a conversion error occurs here, the exception cannot be handled using CX_SY_CONVERSION_ERROR and the associated runtime error occurs instead.The order in which the rows are taken is the same as for the statement LOOP and can also be influenced by specifying a table key keyname after USING KEY. The additions FROM idx1 and TO idx2 have, in relation to jtab, the same syntax and effect as for LOOP.If a conflict with existing primary or secondary table keys occurs, this always raises a non-handleable exception when multiple rows are appended.NoteWhen a standard table is constructed, the constructor operators NEW and VALUE can also append multiple rows from a table to the target table using LINES OF.

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