topic Re: tables in Application Development and Automation Discussions https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837129#M356158 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>Main difference is the usuage of the memory allocated for internal table.</P><P></P><P>Internal table with headerline will allocates the memory as 8k,16k,32k,64k,128k,256k,512k,1024k,2048k.....etc.</P><P></P><P>Suppose one internal table has the data of capacity 1026k then system allocates 2048k memory to internal table. Half the amount of memory is not useful.</P><P></P><P>Internal table without headerline memory consumption is less compare to internal table with header line.</P><P></P><P>In ABAP WAS 6.20 after onwards internal table without headerline is obsolete.</P><P></P><P>Internal table without headerline requires an explicit workarea</P></BODY></HTML> Tue, 09 Jan 2007 09:16:01 GMT Former Member 2007-01-09T09:16:01Z tables https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837128#M356157 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>What are the performance difference between the internal table declared with and without header line?</P><P>Why should internal tables be declared without header line?</P></BODY></HTML> Tue, 09 Jan 2007 09:14:24 GMT https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837128#M356157 Former Member 2007-01-09T09:14:24Z Re: tables https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837129#M356158 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>Main difference is the usuage of the memory allocated for internal table.</P><P></P><P>Internal table with headerline will allocates the memory as 8k,16k,32k,64k,128k,256k,512k,1024k,2048k.....etc.</P><P></P><P>Suppose one internal table has the data of capacity 1026k then system allocates 2048k memory to internal table. Half the amount of memory is not useful.</P><P></P><P>Internal table without headerline memory consumption is less compare to internal table with header line.</P><P></P><P>In ABAP WAS 6.20 after onwards internal table without headerline is obsolete.</P><P></P><P>Internal table without headerline requires an explicit workarea</P></BODY></HTML> Tue, 09 Jan 2007 09:16:01 GMT https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837129#M356158 Former Member 2007-01-09T09:16:01Z Re: tables https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837130#M356159 <HTML><HEAD></HEAD><BODY><P>thx u,</P></BODY></HTML> Tue, 09 Jan 2007 09:22:19 GMT https://community.sap.com/t5/application-development-and-automation-discussions/tables/m-p/1837130#M356159 Former Member 2007-01-09T09:22:19Z