schema

type Index struct {
	Name string
	// Columns are the columns comprising the index.
	Columns []string
	// Cardinality[i] is the number of distinct values of Columns[i] in the
	// table.
	Cardinality []uint64
	// DataColumns are the primary-key columns for secondary indices and
	// all the columns for the primary-key index.
	DataColumns []string
}

type Table struct {
	Name      string
	Columns   []TableColumn
	Indexes   []*Index
	PKColumns []int
	Type      int

	// These vars can be accessed concurrently.
	TableRows   sync2.AtomicInt64
	DataLength  sync2.AtomicInt64
	IndexLength sync2.AtomicInt64
	DataFree    sync2.AtomicInt64
}

type TableColumn struct {
	Name    string
	Type    querypb.Type
	IsAuto  bool
	Default sqltypes.Value
}