Quadcap Embeddable Database

com.quadcap.sql.TableExpression Class Reference

Inheritance diagram for com.quadcap.sql.TableExpression:

List of all members.

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Detailed Description

Some kind of expression that yields a 'table', which can be joined or merged or cursored.

Author:

Stan Bailes

Definition at line 54 of file TableExpression.java.

Public Member Functions
abstract int	rank ()
	Returns zero if this is a scalar expression, one if it's a vector type and 2 if it's a table/cursor type.
abstract boolean	isUpdatable ()
	Is this table expression updatable?
abstract Cursor	getCursor (Session session, Cursor outer) throws SQLException
	Return a cursor which can be used to access this table expression.
Type	getType (Session session, Cursor cursor)
	Return the expression's type if known.
abstract void	getBaseTables (Vector v)
	Return a vector consisting of the names of the underlying base tables that are used to derive this table expression.
void	setWhere (Expression where)
	Set the WHERE clause associated with this table expression.
Expression	getWhere ()
	Return the WHERE clause associated with this table expression.
abstract String	name ()
Package Attributes
boolean	anded = false
Expression	where = null

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Member Function Documentation

abstract void com.quadcap.sql.TableExpression.getBaseTables (  Vector  v  )  [pure virtual]

Return a vector consisting of the names of the underlying base tables that are used to derive this table expression. Implemented in com.quadcap.sql.JoinedTable, com.quadcap.sql.MergeExpression, com.quadcap.sql.SelectExpression, com.quadcap.sql.SelectFromItem, com.quadcap.sql.SelectFromTable, and com.quadcap.sql.VectorExpression. Referenced by com.quadcap.sql.View.getBaseTables(), com.quadcap.sql.SelectFromItem.getBaseTables(), com.quadcap.sql.MergeExpression.getBaseTables(), and com.quadcap.sql.JoinedTable.getBaseTables().

abstract Cursor com.quadcap.sql.TableExpression.getCursor (  Session  session, Cursor  outer )  throws SQLException [pure virtual]

Return a cursor which can be used to access this table expression. Reimplemented from com.quadcap.sql.Expression. Implemented in com.quadcap.sql.JoinedTable, com.quadcap.sql.MergeExpression, com.quadcap.sql.SelectExpression, com.quadcap.sql.SelectFromItem, com.quadcap.sql.SelectFromTable, and com.quadcap.sql.VectorExpression. Referenced by com.quadcap.sql.SelectStmt.execute(), com.quadcap.sql.View.getCursor(), com.quadcap.sql.SelectFromItem.getCursor(), com.quadcap.sql.SelectExpression.getCursor(), com.quadcap.sql.MergeExpression.getCursor(), and com.quadcap.sql.JoinedTable.getCursor().

Type com.quadcap.sql.TableExpression.getType (  Session  session, Cursor  cursor )  [virtual]

Return the expression's type if known. Implements com.quadcap.sql.Expression. Definition at line 75 of file TableExpression.java. References com.quadcap.sql.TableExpression.getType(). Referenced by com.quadcap.sql.TableExpression.getType().

Expression com.quadcap.sql.TableExpression.getWhere (   )

Return the WHERE clause associated with this table expression. Definition at line 93 of file TableExpression.java. References com.quadcap.sql.TableExpression.where. Referenced by com.quadcap.sql.View.checkRow(), and com.quadcap.sql.SelectExpression.AndWhere.visit().

abstract boolean com.quadcap.sql.TableExpression.isUpdatable (   )  [pure virtual]

Is this table expression updatable? Implemented in com.quadcap.sql.JoinedTable, com.quadcap.sql.MergeExpression, com.quadcap.sql.SelectExpression, com.quadcap.sql.SelectFromItem, com.quadcap.sql.SelectFromTable, and com.quadcap.sql.VectorExpression. Referenced by com.quadcap.sql.View.checkRow(), com.quadcap.sql.View.isUpdatable(), com.quadcap.sql.SelectFromItem.isUpdatable(), and com.quadcap.sql.SelectExpression.isUpdatable().

abstract String com.quadcap.sql.TableExpression.name (   )  [pure virtual]

Implemented in com.quadcap.sql.JoinedTable, com.quadcap.sql.MergeExpression, com.quadcap.sql.SelectExpression, com.quadcap.sql.SelectFromItem, com.quadcap.sql.SelectFromTable, and com.quadcap.sql.VectorExpression. Referenced by com.quadcap.sql.SelectFromItem.name(), com.quadcap.sql.MergeExpression.name(), and com.quadcap.sql.JoinedTable.name().

abstract int com.quadcap.sql.TableExpression.rank (   )  [pure virtual]

Returns zero if this is a scalar expression, one if it's a vector type and 2 if it's a table/cursor type. Implements com.quadcap.sql.Expression. Implemented in com.quadcap.sql.JoinedTable, com.quadcap.sql.MergeExpression, com.quadcap.sql.SelectExpression, com.quadcap.sql.SelectFromItem, com.quadcap.sql.SelectFromTable, and com.quadcap.sql.VectorExpression. Referenced by com.quadcap.sql.SelectFromItem.rank().

void com.quadcap.sql.TableExpression.setWhere (  Expression  where  )

Set the WHERE clause associated with this table expression. Reimplemented in com.quadcap.sql.JoinedTable, com.quadcap.sql.MergeExpression, and com.quadcap.sql.SelectFromItem. Definition at line 88 of file TableExpression.java. References com.quadcap.sql.TableExpression.setWhere(). Referenced by com.quadcap.sql.SelectExpression.getCursor(), com.quadcap.sql.SQLParser.querySpecification(), com.quadcap.sql.TableExpression.setWhere(), com.quadcap.sql.SelectFromItem.setWhere(), com.quadcap.sql.MergeExpression.setWhere(), com.quadcap.sql.JoinedTable.setWhere(), and com.quadcap.sql.SelectExpression.AndWhere.visit().

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Member Data Documentation

boolean com.quadcap.sql.TableExpression.anded = false [package]

Definition at line 55 of file TableExpression.java. Referenced by com.quadcap.sql.SelectExpression.AndWhere.visit().

Expression com.quadcap.sql.TableExpression.where = null [package]

Definition at line 56 of file TableExpression.java. Referenced by com.quadcap.sql.TableExpression.getWhere().