[bug] [batch] [sqlite] Added support to drop named CHECK constraints that are specified as part of
a column, rather than table wide. Previously, only constraints associated
with the table were considered.
[bug] [mysql] [ops] Fixed issue where the MySQL dialect would not correctly render the server
default of a column in an alter operation, if the operation were
programmatically generated from an autogenerate pass as it would not
accommodate for the full structure of the DefaultClause construct.
[bug] [batch] [sqlite] Fixed issue where the CAST applied to a JSON column when copying a SQLite
table during batch mode would cause the data to be lost, as SQLite's CAST
with JSON appears to convert the data to the value "0". The CAST is now
skipped in a dialect-specific manner, including for JSON columns on SQLite.
Pull request courtesy Sebastián Ramírez.
[bug] [commands] The alembic current command no longer creates an alembic_version
table in the database if one does not exist already, returning no version
as the current version. This allows checking for migrations in parallel
without introducing race conditions. Pull request courtesy Nikolay
Edigaryev.
[bug] [batch] Fixed issue where columns in a foreign-key referenced table would be
replaced with null-type columns during a batch operation; while this did
not generally have any side effects, it could theoretically impact a batch
operation that also targets that table directly and also would interfere
with future changes to the .append_column() method to disallow implicit
replacement of columns.
[bug] [mssql] Fixed issue where the mssql_drop_foreign_key=True flag on
op.drop_column would lead to incorrect syntax error due to a typo in the
SQL emitted, same typo was present in the test as well so it was not
detected. Pull request courtesy Oleg Shigorin.
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Bumps alembic from 1.3.1 to 1.4.3.
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