Direct CALC page Structure of pages
210 U929-J-Z125-9-76
7.5 Direct CALC p age Depending on which page length was defined for the database, the length of a direct CALC
page may be 2048 bytes, 4000 bytes or 8096 bytes.
Direct CALC pages with a length of 2048 bytes differ from those consisting of 4000 or 8096
bytes with respect to the lengths of entries for the database key value, record sequenc e
number (RSQ) and page index:
– In the case of direct CALC pages with a length of 2048 bytes, the entry for the database
key value occupies 4 bytes; the length of the RSQ entry is 3 bytes, and that of the page
index entry is 8 bytes.
– For direct CALC pages with a length of 4000 or 8096 bytes, the entr y for the database
key value occupies 8 bytes; the length of the RSQ entry is 6 bytes, and that of the page
index entry is 12 bytes.
Note that the values given in the form “number1/number2“ (e.g. 25/29) in figure 53 must be
interpreted as follows:
– “number1” indicates the applicable value for direct CALC pages with a length of
2048 bytes.
– “number2” indicates the applicable value for direct CALC pages with a length of
4000 or 8096 bytes.
All other length and displacement entries are equally applic able to direct CALC pages with
a length of 2048 bytes and direct CALC pages with a length of 4000 o r 8096 bytes.