How come extend is the physical structure ? Can some one explain.

How come extend is the physical structure ? Can some one explain.
thanks
siva

"Tablespaces physically group schema objects for administration convenience. They bridge physical structures, such as datafiles or extents, and logical structures, such as tables and indexes. Tablespaces can store zero or more segments. Segments are schema objects that require storage outside the data dictionary. Tables and indexes are examples of segments. Constraints and sequences are examples of schema objects that do not store data outside the data dictionary and are therefore not segments." - Study Guide.
Read above, it reads "physical structures, such as datafiles or extents", this is where I got confused ?
thanks
siva

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Hi
Tables: LFA1. "vendor master data table
"here by saying Tables they have delcared the LFA1 table for further use in the program"data: l_tabix like sy-tabix.
"here they have defined own table index by copying the structure of system index"case i_CHABASNM.
"when character"
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if sy-subrc = 0.
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l_s_BIW_lfa1_s-ZZacctgrp = lfa1-ktokk.
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modify i_t_data from l_s_BIW_lfa1_s index l_tabix.
"changing the internal table data as per i_t_data"endif.
endloop.
endcase.
endcase.
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Deadlock - can some one explain pls?

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Sounds reasonable. But I do also expect some voodoo
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Message was edited by:
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How come extend is the physical structure ? Can some one explain.

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