create view SystemInfo
as
SELECT table_name,ordinal_position as colorder,column_name as colName,
case extra when 'auto_increment' then 1 else 0 end as IsIdentity,
case column_key when 'pri' then 1 else 0 end as isKey,
data_type as type,0 as bits,
case when character_maximum_length is NULL then numeric_precision else character_maximum_length end as length,
numeric_scale as digit,
case is_nullable when 'yes' then 0 else 1 end as isnullable,
column_default as defaultValue,
column_comment as memo,
concat(table_name,'.',column_name) as col
FROM information_schema.COLUMNS ;