logilab-database #101711 EPOCH function [done]

which return EPOCH timestamp from a datetime/date, and return number of seconds for an interval (mimick postgres behaviour, but maybe shall we have to distinct function for this)

prioritynormal
typeenhancement
done in1.9.0
load0.100
load left0.000
closed by#74bd8d584ea7 closes #101711: EPOCH function for datetime/date/interval types