Package com.mckoi.database.interpret

Class FromTableSubQuerySource

java.lang.Object

com.mckoi.database.interpret.FromTableSubQuerySource

All Implemented Interfaces:

FromTableInterface

public class FromTableSubQuerySource
extends java.lang.Object
implements FromTableInterface

An implementation of FromTableInterface that wraps around a TableSelectExpression object as a sub-query source.

Author:

Tobias Downer

Constructor Summary

Constructors

Constructor	Description
FromTableSubQuerySource(DatabaseConnection connection, java.lang.String unique_key, TableSelectExpression table_expression, com.mckoi.database.interpret.TableExpressionFromSet from_set, TableName aliased_table_name)	Constructs the source.

Method Summary

Modifier and Type	Method	Description
Variable[]	allColumns()	Returns an array of Variable objects that references each column available in this table set item in order from left column to right column.
java.lang.String	getUniqueKey()	Returns the unique name of this source.
java.lang.String	getUniqueName()	Returns a unique name given to this table source.
boolean	matchesReference(java.lang.String catalog, java.lang.String schema, java.lang.String table)	Returns true if this source will match the given catalog, schema and table.
Variable	resolveColumn(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)	Returns a Variable that is a fully resolved form of the given column in this table set.
int	resolveColumnCount(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)	Returns the number of instances we can resolve the given catalog, schema, table and column name to a column or columns within this item.
void	setCaseInsensitive(boolean status)	Toggle the case sensitivity flag.

Methods inherited from class java.lang.Object

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

Constructor Detail

FromTableSubQuerySource

public FromTableSubQuerySource(DatabaseConnection connection,
                               java.lang.String unique_key,
                               TableSelectExpression table_expression,
                               com.mckoi.database.interpret.TableExpressionFromSet from_set,
                               TableName aliased_table_name)

Constructs the source.

Method Detail

getUniqueKey

public java.lang.String getUniqueKey()

Returns the unique name of this source.

setCaseInsensitive

public void setCaseInsensitive(boolean status)

Toggle the case sensitivity flag.

getUniqueName

public java.lang.String getUniqueName()

Description copied from interface: FromTableInterface

Returns a unique name given to this table source. No other sources will share this identifier string.

Specified by:

getUniqueName in interface FromTableInterface

matchesReference

public boolean matchesReference(java.lang.String catalog,
                                java.lang.String schema,
                                java.lang.String table)

Description copied from interface: FromTableInterface

Returns true if this source will match the given catalog, schema and table. If any arguments are null then it is not included in the match.

Used for 'Part.*' type glob searches.

Specified by:

matchesReference in interface FromTableInterface

resolveColumnCount

public int resolveColumnCount(java.lang.String catalog,
                              java.lang.String schema,
                              java.lang.String table,
                              java.lang.String column)

Description copied from interface: FromTableInterface

Returns the number of instances we can resolve the given catalog, schema, table and column name to a column or columns within this item. Note that if catalog, schema, table or column is 'null' then it means it doesn't matter.

For example, say we need to resolve the column 'id' the arguments are null, null, null, "id". This may resolve to multiple columns if there is a mixture of tables with "id" as a column.

Note that parameters of 'null, null, null, null', 'null, null, null, not null', 'null, null, not null, not null', 'null, not null, not null, not null', and 'not null, not null, not null, not null' are only accepted.

Specified by:

resolveColumnCount in interface FromTableInterface

resolveColumn

public Variable resolveColumn(java.lang.String catalog,
                              java.lang.String schema,
                              java.lang.String table,
                              java.lang.String column)

Description copied from interface: FromTableInterface

Returns a Variable that is a fully resolved form of the given column in this table set. This method does not have to check whether the parameters reference more than one column. If more than one column is referenced, the actual column returned is implementation specific.

Specified by:

resolveColumn in interface FromTableInterface

allColumns

public Variable[] allColumns()

Description copied from interface: FromTableInterface

Returns an array of Variable objects that references each column available in this table set item in order from left column to right column.

Specified by:

allColumns in interface FromTableInterface