[11.x] Fix altering a table that has a column with default 0
on SQLite
#51803
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Fixes #51747
Modifying a column on a table that has another column with
default 0
was causing the default expression to be dropped, this PR fixes that.This happens only when the table has a column with
default 0
as->default(new Expression('0'))
and not->default(0)
that compiles asdefault '0'
.