Package edu.caltech.nanodb.commands

Class DDLUtils

java.lang.Object

edu.caltech.nanodb.commands.DDLUtils

public class DDLUtils
extends java.lang.Object

This helper class provides some useful functions for constructing keys and indexes and other details for tables that are being initialized.

Constructor Summary

Constructors

Constructor	Description
DDLUtils()

Method Summary

Modifier and Type	Method	Description
static ForeignKeyColumnRefs	makeForeignKey(Schema tableSchema, TableInfo refTableInfo, ConstraintDecl constraintDecl)	This method constructs a ForeignKeyColumnRefs object that includes the columns named in the input list, as well as the referenced table and column names.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DDLUtils

public DDLUtils()

Method Detail

makeForeignKey

public static ForeignKeyColumnRefs makeForeignKey(Schema tableSchema,
                                                  TableInfo refTableInfo,
                                                  ConstraintDecl constraintDecl)

This method constructs a ForeignKeyColumnRefs object that includes the columns named in the input list, as well as the referenced table and column names. Note that this method does not update the schema stored on disk, or create any other supporting files.

Parameters:

tableSchema - the schema of the table that the foreign key will be added to

refTableInfo - the table that the foreign key will reference

constraintDecl - the parsed constraint declaration describing the foreign key

Returns:

an object describing the foreign key

Throws:

SchemaNameException - if a column-name cannot be found, or if a column-name is ambiguous (unlikely), or if a column is specified multiple times in the input list.