Find the number of rows in a table from metadata
For SybaseIQ 16 (SAP IQ 16.0 SP08) use system viewSYSTAB as:

select * from SYSTAB


Here is a link to SyBase IQ v16 documentation. Page 918 (correction to my comment above) says:


  Each row of the SYSTAB system view describes one table or view in the
  database. Additional information for views  can be found in the
  SYSVIEW system view. The underlying system table for this view is
  ISYSTAB.
  
  Column:      count     Datatype:    UNSIGNED BIGINT     Description:
  The number of rows in the table or mate­ rialized view. This value is
  updated dur­ing each successful checkpoint. This number is used to
  optimize database ac­cess. The count is always 0 for a
  non-materialized view or remote table.