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sqlupdate/sqlupdate(20161108)dns_response_strategy增加字段.sql

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+-- Add/modify columns 
+alter table DNS_RESPONSE_STRATEGY add MIN_TTL INTEGER not null;
+-- Add comments to the columns 
+comment on column DNS_RESPONSE_STRATEGY.MIN_TTL
+  is '最小生存时间';
+-- Add/modify columns 
+alter table DNS_RESPONSE_STRATEGY add MAX_TTL INTEGER not null;
+-- Add comments to the columns 
+comment on column DNS_RESPONSE_STRATEGY.MAX_TTL
+  is '最大生存时间';