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== `sqlite/meta_data.hpp`
The meta_data header provides some meta_data for columns.
[source,cpp,subs=+quotes]
----
// The metadata of a column
struct column_meta_data
{
// Data type fo the column
cstring_ref data_type;
// Name of default collation sequence
cstring_ref collation;
// true if column has a NOT NULL constraint
bool not_null;
// true if column is part of the PRIMARY KEY
bool primary_key;
// true if column is AUTOINCREMENT
bool auto_increment;
};
// get the meta-data of one colum
column_meta_data table_column_meta_data(connection & conn,
cstring_ref db_name, cstring_ref table_name, cstring_ref column_name,
system::error_code & ec, error_info &ei);
column_meta_data table_column_meta_data(connection & conn,
cstring_ref table_name, cstring_ref column_name,
system::error_code & ec, error_info &ei);
column_meta_data table_column_meta_data(connection & conn,
cstring_ref db_name, cstring_ref table_name, cstring_ref column_name);
column_meta_data table_column_meta_data(connection & conn,
cstring_ref table_name, cstring_ref column_name);
---
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