| Commit message (Collapse) | Author | Age | Files | Lines |
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The PR #27384 changed integer-like primary key to be autoincrement
unless an explicit default. This means that integer-like primary key is
restored as autoincrement unless dumping the default nil explicitly.
We should dump integer-like primary key with default nil correctly.
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MySQL generated columns: https://dev.mysql.com/doc/refman/5.7/en/create-table-generated-columns.html
MariaDB virtual columns: https://mariadb.com/kb/en/mariadb/virtual-computed-columns/
Declare virtual columns with `t.virtual name, type: …, as: "expression"`.
Pass `stored: true` to persist the generated value (false by default).
Example:
create_table :generated_columns do |t|
t.string :name
t.virtual :upper_name, type: :string, as: "UPPER(name)"
t.virtual :name_length, type: :integer, as: "LENGTH(name)", stored: true
t.index :name_length # May be indexed, too!
end
Closes #22589
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* Don't force PKs on tables that have explicitly opted out
* All integer-like PKs are autoincrement unless they have an explicit
default
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Follow up to 99cf7558000090668b137085bfe6bcc06c4571dc.
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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Follow up to #18228.
In MySQL and PostgreSQL, primary key is to be `NOT NULL` implicitly.
But in SQLite it must be specified `NOT NULL` explicitly.
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Extract `default_primary_key?` to refactor `column_spec_for_primary_key`
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working
Currently the results of `column.serial?` is not correct. For
`column.serial?` correctly working, initialize `column.table_name`
immediately.
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Actually `:name` and `:type` are not column options.
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A return value of `schema_type` is used by:
1. primary key type: using as `symbol.inspect`
2. normal column type: using as `symbol.to_s`
It is better to return symbol.
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Such as #10404, #18206.
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Currently `tinyblob` is dumped to `t.binary "tiny_blob", limit: 255`.
But `t.binary ... limit: 255` is generating SQL to `varchar(255)`.
It is incorrect. This commit fixes this problem.
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Current master branch includes many schema dumping improvements.
It extract these features to the appropriate files.
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