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module ActiveRecord
module ConnectionAdapters
module MySQL
module ColumnDumper
def column_spec_for_primary_key(column)
spec = super
if [:integer, :bigint].include?(schema_type(column)) && !column.auto_increment?
spec[:default] ||= schema_default(column) || "nil"
end
spec[:unsigned] = "true" if column.unsigned?
spec
end
def prepare_column_options(column)
spec = super
spec[:unsigned] = "true" if column.unsigned?
if supports_virtual_columns? && column.virtual?
spec[:as] = extract_expression_for_virtual_column(column)
spec[:stored] = "true" if /\b(?:STORED|PERSISTENT)\b/.match?(column.extra)
spec = { type: schema_type(column).inspect }.merge!(spec)
end
spec
end
def migration_keys
super + [:unsigned]
end
private
def default_primary_key?(column)
super && column.auto_increment?
end
def schema_type(column)
if column.sql_type == "tinyblob"
:blob
else
super
end
end
def schema_precision(column)
super unless /time/.match?(column.sql_type) && column.precision == 0
end
def schema_collation(column)
if column.collation && table_name = column.table_name
@table_collation_cache ||= {}
@table_collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"]
column.collation.inspect if column.collation != @table_collation_cache[table_name]
end
end
def extract_expression_for_virtual_column(column)
if mariadb?
create_table_info = create_table_info(column.table_name)
if %r/#{quote_column_name(column.name)} #{Regexp.quote(column.sql_type)} AS \((?<expression>.+?)\) #{column.extra}/m =~ create_table_info
$~[:expression].inspect
end
else
sql = "SELECT generation_expression FROM information_schema.columns" \
" WHERE table_schema = #{quote(@config[:database])}" \
" AND table_name = #{quote(column.table_name)}" \
" AND column_name = #{quote(column.name)}"
select_value(sql, "SCHEMA").inspect
end
end
end
end
end
end
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