Can Liquibase or Flyway handle multi non-linear versioning scenario? -


here tough one.

  1. v1.1 has table index i.
  2. v2.1 contains table , index well.

a bug discovered , in v1.1.0.1 changes code , result, decided drop index.
created corresponding patch v2.1, v2.1.0.6.

the customer applied patch v1.1.0.1 , few weeks later upgraded v2.1 (without patch 6)

as v2.1 code base performs better index have "broken" application.

  • i can't force customers apply latest patch.
  • i can't force developers avoid such scenarios.

can liquibase or flyway handle scenario?

liquibase handle drop index change across branches fine, since going version contains code (a drop index change) 1 not expect going end broken app state.

with liquibase, changes independent of each other , independent of versioning. can think of liquibase changelog ordered list of changes make each have unique identifier. when update, liquibase checks each change in turn see if has been ran , runs if has not.

any "versioning" purely within codebase , branching scheme, liquibase not care.

imagine start out 1.1.0 release looks like:

  • change a
  • change b
  • change c

when deploy 1.1.0, customer database know changes a,b, , c ran.

you have v2.1 new changesets end of changelog file, looks like:

  • change a
  • change b
  • change c
  • change x
  • change y
  • change z

and 2.1 customers database know a,b,c,x,y,z applied.

when create 1.1.0.1 changeset d drops index, end changelog in 1.1.0.1 branch:

  • change a
  • change b
  • change c
  • change d

but when upgrade 1.1.0.1 customers 2.1, liquibase compares defined changesets of (a,b,c,x,y,z) against known changesets of (a,b,c,d) , runs x,y,z. doesn't care there ran changeset of d, nothing that.

the liquibase diff support can used bit of sanity check , able report there missing index compared "correct" database, not in production deployment scenario.


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