Uses of Class
edu.caltech.nanodb.relations.KeyColumnRefs

Packages that use KeyColumnRefs

Package	Description
edu.caltech.nanodb.relations	This package contains the basic data-types for representing relations in NanoDB.
edu.caltech.nanodb.storage	This package contains the classes for the Storage Manager, which is responsible for how data is stored in and retrieved from database files.

Uses of KeyColumnRefs in edu.caltech.nanodb.relations

Fields in edu.caltech.nanodb.relations with type parameters of type KeyColumnRefs

Modifier and Type	Field	Description
private java.util.ArrayList<KeyColumnRefs>	Schema.candidateKeys	A collection of all candidate-key objects specifying the sets of columns that comprise candidate keys on this table.

Methods in edu.caltech.nanodb.relations that return KeyColumnRefs

Modifier and Type	Method	Description
KeyColumnRefs	Schema.getKeyOnColumns(int[] colIndexes)	Returns any candidate-key from this schema that has the specified set of columns.
KeyColumnRefs	Schema.getKeyOnColumns(ColumnRefs colRefs)	Returns any candidate-key from this schema that has the specified set of columns.
KeyColumnRefs	Schema.getPrimaryKey()	Returns the primary key on this table, or null if there is no primary key.

Methods in edu.caltech.nanodb.relations that return types with arguments of type KeyColumnRefs

Modifier and Type	Method	Description
java.util.List<KeyColumnRefs>	Schema.getAllKeysOnColumns(int[] colIndexes)	Returns all candidate-keys from this schema that have the specified set of columns.
java.util.List<KeyColumnRefs>	Schema.getAllKeysOnColumns(ColumnRefs colRefs)	Returns all candidate-keys from this schema that have the specified set of columns.
java.util.List<KeyColumnRefs>	Schema.getCandidateKeys()	Returns an unmodifiable list of candidate keys present on the schema.

Methods in edu.caltech.nanodb.relations with parameters of type KeyColumnRefs

Modifier and Type	Method	Description
void	Schema.addCandidateKey(KeyColumnRefs ck)	Adds another candidate key to the schema.
private boolean	DatabaseConstraintEnforcer.hasCandidateKeyValue(TableInfo tableInfo, KeyColumnRefs candidateKey, Tuple tuple)	Checks to see if a particular candidate-key value already appears in a table.

Constructors in edu.caltech.nanodb.relations with parameters of type KeyColumnRefs

Constructor	Description
IndexColumnRefs(java.lang.String indexName, KeyColumnRefs keyColRefs)

Uses of KeyColumnRefs in edu.caltech.nanodb.storage

Methods in edu.caltech.nanodb.storage that return KeyColumnRefs

Modifier and Type	Method	Description
protected KeyColumnRefs	SchemaWriter.readKey(PageReader pgReader, int typeID, TableConstraintType type)	This helper function writes a primary key or candidate key to the table's schema stored in the header page.

Methods in edu.caltech.nanodb.storage with parameters of type KeyColumnRefs

Modifier and Type	Method	Description
protected void	SchemaWriter.writeKey(PageWriter pgWriter, TableConstraintType type, KeyColumnRefs key)	This helper function writes a primary key or candidate key to the schema representation.