CreateTable(model.TableSchema)

DropTable(TableRef)

AddColumn(table: TableRef, column: model.ColumnSchema)

DropColumn(table: TableRef, column_name: String)

AlterColumn(
  table: TableRef,
  column_name: String,
  current: model.ColumnSchema,
  target: model.ColumnSchema,
)

AddPrimaryKey(table: TableRef, primary_key: model.PrimaryKey)

DropPrimaryKey(table: TableRef, primary_key_name: String)

AddUniqueConstraint(
  table: TableRef,
  constraint: model.UniqueConstraint,
)

DropUniqueConstraint(table: TableRef, constraint_name: String)

AddForeignKey(table: TableRef, foreign_key: model.ForeignKey)

DropForeignKey(table: TableRef, foreign_key_name: String)

AddIndex(table: TableRef, index: model.IndexSchema)

DropIndex(table: TableRef, index_name: String)

TableRef(schema: String, name: String)