object Catalog extends Serializable

The Catalog object keeps track of relations in the database. It maintains two Maps: one mapping name to relation schema and the other mapping name to relation object stored in memory.

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  1. Catalog
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Value Members

  1. def add(name: String, colName: Seq[String], key: Int, domain: String = null, rel: Tabular = null): Unit

    Add meta-data about the new relation to the catalog.

    Add meta-data about the new relation to the catalog.

    name

    the name of the relation

    colName

    the names of columns

    key

    the column number for the primary key (< 0 => no primary key)

    domain

    an optional string indicating domains for columns (e.g., 'SD' = 'StrNum', 'Double')

    rel

    the relation

  2. def clear(): Unit

    Remove all relations from the catalog.

  3. def getRelation(name: String): Tabular

    Get the relation object for the relation named 'name'.

    Get the relation object for the relation named 'name'.

    name

    the name of the relation

  4. def getSchema(name: String): (Seq[String], Int, String)

    Get the schema/meta-data about the relation named 'name'.

    Get the schema/meta-data about the relation named 'name'.

    name

    the name of the relation

  5. def names: Iterable[String]

    Return an iterator over all relations names in the catalog.

  6. def remove(name: String): Unit

    Remove the relation named 'name' from the catalog.

    Remove the relation named 'name' from the catalog.

    name

    the name of the relation