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2 Commits

Author SHA1 Message Date
Piotr Sarna
65bf6d34fe schema: add implementation of computing token column 
Computed column of 'token' type can now have its value computed.
 2019-07-19 11:47:48 +02:00
Piotr Sarna
491b7a817f schema: add computed info to column definition 
Some columns may represent not user-provided values, but ones computed
from other columns. Currently an example is token column used in secondary
indexes to provide proper ordering. In order to avoid hardcoding special
cases in execution stage, optional additional information for computed
columns is stored in column definition.
 2019-07-19 11:47:46 +02:00