For internal use only. This statement loads statistics into the ISYSCOLSTAT system table. It is used by the dbunload utility to unload column statistics from the old database. It should not be used manually.
LOAD STATISTICS [ [ owner.]table-name.]column-name format-id, density, max-steps, actual-steps, step-values, frequencies
format-id Internal field used to determine the format of the rest of the row in the ISYSCOLSTAT system table.
density An estimate of the weighted average selectivity of a single value for the column, not counting the selectivity of large single value selectivities stored in the row.
max-steps The maximum number of steps allowed in the histogram.
actual-steps The number of steps actually used at this time.
step-values Boundary values of the histogram steps.
frequencies Selectivities of histogram steps.
Must have DBA authority.
SQL/2003 Vendor extension.
|Envoyer votre avis sur cette page par email.||Copyright © 2009, iAnywhere Solutions, Inc. - SQL Anywhere 11.0.1|