Set max column value as sequence start value with liquibase tags

问题

I wonder if it possible to get maximum column value from a certain table and set it as start sequence value with no pure sql. The following code doesn't work:

   <property name="maxId" value="(select max(id)+1 from some_table)" dbms="h2,mysql,postgres"/>
   <changeSet author="author (generated)" id="1447943899053-1">
      <createSequence sequenceName="id_seq" startValue="${maxId}" incrementBy="1"/>
   </changeSet>

Got an error:

Caused by: liquibase.parser.core.ParsedNodeException: java.lang.NumberFormatException: For input string: "${m"

I've tried it with no parentheses around select ... etc. with the same result. So it's not possible to use computed value as start sequence value?

回答1:

So, such a solution worked for me:

<changeSet author="dfche" id="1448634241199-1"> 
  <createSequence sequenceName="user_id_seq" startValue="1" incrementBy="1"/> 
</changeSet> 
<changeSet author="dfche" id="1448634241199-2">
  <sql dbms="postgresql">select setval('user_id_seq', max(id)+1) from jhi_user</sql> 
  <sql dbms="h2">alter sequence user_id_seq restart with (select max(id)+1 from jhi_user)</sql>
</changeSet>

回答2:

For postgres correct sql dbms sentence is:

<sql dbms="postgresql">select setval('some_table_id_seq', (select max(id)+1 from some_table), false)</sql>

来源：https://stackoverflow.com/questions/33888587/set-max-column-value-as-sequence-start-value-with-liquibase-tags