Method RetrieveColumn

pkg/expression/schema.go:123–129

RetrieveColumn retrieves column in expression from the columns in schema.

(col *Column)

// RetrieveColumn retrieves column in expression from the columns in schema.
func (s *Schema) RetrieveColumn(col *Column) *Column {
	index := s.ColumnIndex(col)
	if index != -1 {
		return s.Columns[index]
	}
	return nil
}

// IsUnique checks if the column is unique key.
// Pass strong=true to check strong contraint: unique && notnull.