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Direct CALC page Structure of pages
210 U929-J-Z125-9-76
7.5 Direct CALC page
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 sequence
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 entry 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 applicable to direct CALC pages with
a length of 2048 bytes and direct CALC pages with a length of 4000 or 8096 bytes.