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8000 Enum to varchar by shlomi-noach · Pull Request #963 · github/gh-ost · GitHub
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shlomi-noach
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Related issue: #642

Description

Looking into -alter converting an enum into varchar. Per #642 this copies the numeric value of the enum into the varchar column, where we want the textual value.

Initial commit: test suite to confirm error.

Support a complete ALTER TABLE statement in --alter
Initial commit: towards setting up a test suite

Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
…original table, applying AUTO_INCREMENT value onto ghost table if applicable and user has not specified AUTO_INCREMENT in alter statement
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Copying AUTO_INCREMENT value to ghost table
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Generated column as part of UNIQUE (or PRIMARY) KEY
Cut-over should wait for heartbeat lag to be low enough to succeed
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
All MySQL DBs limited to max 3 concurrent/idle connections
…context

Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
hooks: reporting GH_OST_ETA_SECONDS. ETA as part of migration context
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
@timvaillancourt
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@shlomi-noach any concerns if I re-open this PR? I think this includes some PRs we haven't merged but this would be useful to have in this repo

@shlomi-noach
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@timvaillancourt let me open a new one, since there's been more commits to this branch than are present here.

@timvaillancourt
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@shlomi-noach oh, thanks a lot!

We can handle getting this PR in-sync if you'd like, I think we'll just need to merge a few dependant PRs to get this one mergeable. Totally up to you, thanks!

@shlomi-noach
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@timvaillancourt I see some merge conflicts locally, looks like I need to pull from upstream. Will do so tomorrow morning!

@shlomi-noach shlomi-noach reopened this May 4, 2021
@shlomi-noach
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@timvaillancourt well that was short. The PR is all yours!

Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
@timvaillancourt
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timvaillancourt commented May 4, 2021

@shlomi-noach thanks a lot!

This support will unblock some varchar -> enum migrations we wanted to do but were afraid we couldn't roll back ❤️🎉

@shlomi-noach
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unblock some varchar -> enum

I hope you mean enum -> varchar 😛

@timvaillancourt
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unblock some varchar -> enum

I hope you mean enum -> varchar 😛

@shlomi-noach I think the blocked migrations are varchar -> enum (which already worked?) but we were worried we couldn't reverse the migration without trashing the data if we needed to

I believe we would have numbers instead of real varchar values if we reversed a migration to enum

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ahh, got it.

@shlomi-noach
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branch updated after recent merge of downstream contribution.

@timvaillancourt
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This PR passed integration testing 100%, merging. Thanks @shlomi-noach!

@timvaillancourt timvaillancourt merged commit 9bc508f into github:master Jun 10, 2021
@shlomi-noach shlomi-noach deleted the enum-to-varchar branch June 10, 2021 17:47
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