Uses of Class
com.mckoi.database.Expression

Packages that use Expression

Package	Description
com.mckoi.database	The core database classes for Mckoi.
com.mckoi.database.interpret	These classes interpret specific SQL statements, such as Insert and Delete.
com.mckoi.database.sql	These classes parse SQL statements in Mckoi.

Uses of Expression in com.mckoi.database

Fields in com.mckoi.database declared as Expression

Modifier and Type	Field	Description
private Expression[]	FunctionTable.exp_list	The list of expressions that are evaluated to form each column.
private Expression	Assignment.expression	Set expression that is the rhs of the assignment.
private Expression	QueryPlan.ConstantSelectNode.expression	The search expression.
private Expression	QueryPlan.ExhaustiveSelectNode.expression	The search expression.
private Expression	QueryPlan.FunctionalSelectNode.expression	The function expression (eg.
private Expression	QueryPlan.RangeSelectNode.expression	A simple expression that represents the range to select.
private Expression	QueryPlan.SimplePatternSelectNode.expression	The search expression.
Expression	Transaction.CheckExpression.expression	The expression to check.
private Expression[]	QueryPlan.CreateFunctionsNode.function_list	The list of functions to create.
private Expression[]	QueryPlan.GroupNode.function_list	Any aggregate functions (or regular function columns) that are to be planned.
private static Expression	FunctionFactory.GLOB_EXPRESSION
static Expression[]	FunctionFactory.GLOB_LIST	Represents a function argument * for glob's such as 'count(*)'
(package private) Expression	JoiningSet.JoinPart.on_expression	The expression that we are joining on (eg.
private Expression[]	AbstractFunction.params	The list of expressions this function has as parameters.
private Expression[]	FunctionDef.params	The list of parameters for the function.
private Expression	QueryPlan.JoinNode.right_expression	The expression evaluated on the right table.
private Expression	QueryPlan.SimpleSelectNode.right_expression	The RHS expression.
private Expression[]	QueryPlan.MultiColumnEquiSelectNode.values	The values of the cells to equi-select (must be constant expressions).

Methods in com.mckoi.database that return Expression

Modifier and Type	Method	Description
Expression	Expression.concat(Expression expr)	Merges an expression with this expression.
Expression	DataTableColumnDef.getDefaultExpression(TransactionSystem system)
Expression	Expression.getEndExpression()	Returns the end Expression of this expression.
Expression	Assignment.getExpression()	Returns the Expression for this assignment.
Expression	JoiningSet.getOnExpression(int n)	Returns the ON Expression for the type of join after table 'n' in the set.
Expression	AbstractFunction.getParameter(int n)	Returns the parameter at the given index in the parameters list.
Expression[]	FunctionDef.getParameters()	The list of parameters that are passed to the function.
static Expression	Expression.parse(java.lang.String expression)	Static method that parses the given string which contains an expression into an Expression object.
static Expression	Expression.simple(java.lang.Object ob1, Operator op, java.lang.Object ob2)	Generates a simple expression from two objects and an operator.
Expression[]	Expression.split()	Returns an array of two Expression objects that represent the left hand and right and side of the last operator in the post fix notation.

Methods in com.mckoi.database with parameters of type Expression

Modifier and Type	Method	Description
void	DatabaseConnection.addCheckConstraint(TableName table_name, Expression expression, short deferred, java.lang.String constraint_name)	Same as the Transaction.addCheckConstraint method.
void	Transaction.addCheckConstraint(TableName table_name, Expression expression, short deferred, java.lang.String constraint_name)	Adds a check expression that becomes perminent when the transaction is committed.
void	JoiningSet.addJoin(int type, Expression on_expression)	Adds a joining type to the set, and an 'on' expression.
void	JoiningSet.addPreviousJoin(int type, Expression on_expression)	Hack, add a joining type to the previous entry from the end.
Table	Table.all(QueryContext context, Expression lhs, Operator op, Table table)	Evaluates a non-correlated ALL type operator given the LHS expression, the RHS subquery and the ALL operator to use.
Table	Table.any(QueryContext context, Expression lhs, Operator op, Table right_table)	Evaluates a non-correlated ANY type operator given the LHS expression, the RHS subquery and the ANY operator to use.
private void	QueryPlan.RangeSelectNode.calcRange(QueryContext context, DataTableColumnDef field, SelectableRangeSet range, Expression exp)	Calculates a list of SelectableRange objects that represent the range of the expression.
private static void	QueryPlan.cloneArray(Expression[] array)	Convenience, replaces all elements of the array with clone versions of themselves.
Expression	Expression.concat(Expression expr)	Merges an expression with this expression.
void	Expression.copyTextFrom(Expression e)	Copies the text from the given expression.
private java.util.ArrayList	QueryPlan.RangeSelectNode.createAndList(java.util.ArrayList list, Expression exp)	Given an Expression, this will return a list of expressions that can be safely executed as a set of 'and' operations.
(package private) TObject	RowData.evaluate(Expression expression, QueryContext context)	Evaluates the expression and returns the object it evaluates to using the local VariableResolver to resolve variables in the expression.
Table	Table.exhaustiveSelect(QueryContext context, Expression exp)	Exhaustively searches through this table for rows that match the expression given.
(package private) void	DataTableDef.resolveColumns(boolean ignore_case, Expression exp)	Resolves variables in a column so that any unresolved column names point to this table.
static Table	FunctionTable.resultTable(DatabaseQueryContext context, Expression expression)	Returns a FunctionTable that has a single Expression evaluated in it.
void	DataTableColumnDef.setDefaultExpression(Expression expression)
void	RowData.setupEntire(int[] col_indices, Expression[] exps, QueryContext context)	Sets up an entire row given the array of Expressions and a list of indices to the columns to set.
void	DatabaseConnection.setVar(java.lang.String name, Expression exp)	Assigns a variable to the expression for this connection.
Table	Table.simpleJoin(QueryContext context, Table table, Variable lhs_var, Operator op, Expression rhs)	A simple join operation.
Table	Table.simpleSelect(QueryContext context, Variable lhs_var, Operator op, Expression rhs)	A simple select on this table.
private static boolean	DatabaseConnection.toBooleanValue(Expression exp)	Evaluates the expression to a boolean value (true or false).
private void	QueryPlan.RangeSelectNode.updateRange(QueryContext context, SelectableRangeSet range, DataTableColumnDef field, Expression e)	Updates a range with the given expression.

Constructors in com.mckoi.database with parameters of type Expression

Constructor	Description
AbsFunction(Expression[] params)
AbstractAggregateFunction(java.lang.String name, Expression[] params)	Constructs an aggregate function.
AbstractFunction(java.lang.String name, Expression[] params)	Constructs the Function with the given expression array as parameters.
AggOrFunction(Expression[] params)
Assignment(Variable variable, Expression expression)	Constructs the assignment.
AvgFunction(Expression[] params)
BinaryToHexFunction(Expression[] params)
CoalesceFunction(Expression[] params)
ConcatFunction(Expression[] params)
ConstantSelectNode(QueryPlanNode child, Expression exp)
CountFunction(Expression[] params)
CreateFunctionsNode(QueryPlanNode child, Expression[] function_list, java.lang.String[] name_list)	Constructor.
CurrValFunction(Expression[] params)
DateFormatFunction(Expression[] params)
DateObFunction(Expression[] params)
DistinctCountFunction(Expression[] params)
ExhaustiveSelectNode(QueryPlanNode child, Expression exp)
Expression(Expression exp)	Constructs a copy of the given Expression.
Expression(Expression exp1, Operator op, Expression exp2)	Constructs a new Expression from the concatination of expression1 and expression2 and the operator for them.
ForeignRuleConvert(Expression[] params)
FunctionalSelectNode(QueryPlanNode child, Expression exp)
FunctionDef(java.lang.String name, Expression[] params)	Constructs the FunctionDef.
FunctionTable(Expression[] exp_list, java.lang.String[] col_names, DatabaseQueryContext context)
FunctionTable(Table cross_ref_table, Expression[] in_exp_list, java.lang.String[] col_names, DatabaseQueryContext context)	Constructs the FunctionTable.
GreatestFunction(Expression[] params)
GroupNode(QueryPlanNode child, Variable[] columns, Variable group_max_column, Expression[] function_list, java.lang.String[] name_list)	Groups over the given columns from the child.
GroupNode(QueryPlanNode child, Variable group_max_column, Expression[] function_list, java.lang.String[] name_list)	Groups over the entire child (always ends in 1 result in set).
HexToBinaryFunction(Expression[] params)
IfFunction(Expression[] params)
JavaObjectInstantiation(Expression[] params)
JavaObjectInstantiation2(Expression[] params)
JoinNode(QueryPlanNode left, QueryPlanNode right, Variable left_var, Operator join_op, Expression right_expression)
JoinPart(int type, Expression on_expression)	Constructs the JoinPart.
LeastFunction(Expression[] params)
LengthFunction(Expression[] params)
LowerFunction(Expression[] params)
LTrimFunction(Expression[] params)
MaxFunction(Expression[] params)
MinFunction(Expression[] params)
ModFunction(Expression[] params)
MultiColumnEquiSelectNode(QueryPlanNode child, Variable[] columns, Expression[] values)
NextValFunction(Expression[] params)
PowFunction(Expression[] params)
PrivGroupsFunction(Expression[] params)
PrivilegeString(Expression[] params)
RangeSelectNode(QueryPlanNode child, Expression exp)
RoundFunction(Expression[] params)
RTrimFunction(Expression[] params)
SetValFunction(Expression[] params)
SignFunction(Expression[] params)
SimplePatternSelectNode(QueryPlanNode child, Expression exp)
SimpleSelectNode(QueryPlanNode child, Variable left_var, Operator op, Expression right_expression)
SQLCastFunction(Expression[] params)
SQLTrimFunction(Expression[] params)
SQLTypeString(Expression[] params)
SqrtFunction(Expression[] params)
SubstringFunction(Expression[] params)
SumFunction(Expression[] params)
TimeObFunction(Expression[] params)
TimeStampObFunction(Expression[] params)
ToNumberFunction(Expression[] params)
UniqueKeyFunction(Expression[] params)
UpperFunction(Expression[] params)
UserFunction(Expression[] params)
ViewDataConvert(Expression[] params)

Uses of Expression in com.mckoi.database.interpret

Fields in com.mckoi.database.interpret declared as Expression

Modifier and Type	Field	Description
(package private) Expression[]	Show.args	Arguments of the show statement.
(package private) Expression	Sequence.cache_value
(package private) Expression	ConstraintDef.check_expression
(package private) Expression	ColumnDef.default_expression
Expression	ByColumn.exp	The expression that we are ordering by.
(package private) Expression	Set.exp	The Expression that is the value to assign the variable to (if applicable).
private Expression	Planner.QueryTableSetPlanner.ComplexSingleExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.ConstantExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.ExhaustiveJoinExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.ExhaustiveSelectExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.ExhaustiveSubQueryExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.SimplePatternExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.SimpleSelectExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.SimpleSingleExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.SimpleSubQueryExpressionPlan.expression
(package private) Expression	Planner.QueryTableSetPlanner.SingleVarPlan.expression
private Expression	Planner.QueryTableSetPlanner.StandardJoinExpressionPlan.expression
private Expression	Planner.QueryTableSetPlanner.SubLogicExpressionPlan.expression
Expression	SelectColumn.expression	The expression of this column.
(package private) Expression	Sequence.increment
(package private) Expression	Planner.PlanTableSource.left_on_expr
(package private) Expression	Sequence.max_value
(package private) Expression	Sequence.min_value
(package private) Expression	ConstraintDef.original_check_expression
(package private) Expression	ColumnDef.original_default_expression
(package private) Expression	Planner.PlanTableSource.right_on_expr
private Expression	SearchExpression.search_expression	The originating expression.
(package private) Expression	Sequence.start_value

Methods in com.mckoi.database.interpret that return Expression

Modifier and Type	Method	Description
(package private) Expression	TableExpressionFromSet.dereferenceAssignment(Variable v)	Dereferences a fully qualified reference that is within this set.
private static Expression	Planner.filterHavingClause(Expression having_expr, java.util.ArrayList aggregate_list, QueryContext context)	Given a HAVING clause expression, this will generate a new HAVING clause expression with all aggregate expressions put into the given extra function list.
Expression	SearchExpression.getFromExpression()	Returns the search expression as an Expression object.
Expression	FromClause.getOnExpression(int n)	Returns the ON Expression for the type of join after table 'n' in the set.

Methods in com.mckoi.database.interpret with parameters of type Expression

Modifier and Type	Method	Description
void	TableExpressionFromSet.addFunctionRef(java.lang.String name, Expression expression)	Adds a function resource to the set.
(package private) Variable	Planner.QuerySelectColumnSet.addHiddenFunction(java.lang.String fun_alias, Expression function, QueryContext context)	Adds a new hidden function into the column set.
void	FromClause.addJoin(int type, Expression on_expression)	Adds a Join to the from clause.
void	FromClause.addPreviousJoin(int type, Expression on_expression)	Hack, add a joining type to the previous entry from the end.
private void	Planner.QueryTableSetPlanner.addSingleVarPlanTo(java.util.ArrayList list, Planner.PlanTableSource table, Variable variable, Variable single_var, Expression[] exp_parts, Operator op)	Adds a single var plan to the given list.
(package private) void	SearchExpression.appendExpression(Expression expression)	Concatinates a new expression to the end of this expression and uses the 'AND' operator to seperate the expressions.
(package private) void	ColumnChecker.checkExpression(Expression expression)	Resolves all the variables in the expression throwing a DatabaseException if any errors found.
private java.util.ArrayList	Planner.QueryTableSetPlanner.createAndList(java.util.ArrayList list, Expression exp)	Given an Expression, this will return a list of expressions that can be safely executed as a set of 'and' operations.
private static Expression	Planner.filterHavingClause(Expression having_expr, java.util.ArrayList aggregate_list, QueryContext context)	Given a HAVING clause expression, this will generate a new HAVING clause expression with all aggregate expressions put into the given extra function list.
private void	UserManager.internalCreateUser(DatabaseQueryContext context, java.lang.String username, java.lang.String password_str, Expression[] groups_list, java.lang.String lock_status)	Private method that creates a new user.
private void	UserManager.internalSetUserGroupsAndLock(DatabaseQueryContext context, java.lang.String username, Expression[] groups_list, java.lang.String lock_status)	Private method that sets the user groups and lock status.
(package private) QueryPlanNode	Planner.QueryTableSetPlanner.logicalEvaluate(Expression exp)	Evaluates a search Expression clause.
(package private) void	Planner.QueryTableSetPlanner.planForExpression(Expression exp)	Evaluates the search Expression clause and alters the banches of the plans in this object as necessary.
(package private) void	Statement.resolveExpression(Expression exp)	Given an Expression, this will run through the expression and resolve any variable names via the 'resolveVariableName' method here.
void	ConstraintDef.setCheck(Expression exp)	Sets object up for a check constraint.
void	ColumnDef.setDefaultExpression(Expression exp)	Sets the default expression (this is used to make a new constraint).
void	SearchExpression.setFromExpression(Expression expression)	Sets this search expression from the given expression.
void	Planner.QueryTableSetPlanner.setJoinInfoBetweenSources(int between_index, int join_type, Expression on_expr)	Links the last added table source to the previous added table source through this joining information.
(package private) void	Planner.PlanTableSource.setLeftJoinInfo(Planner.PlanTableSource left_plan, int join_type, Expression on_expr)	Sets the left join information for this plan.
(package private) void	Planner.PlanTableSource.setRightJoinInfo(Planner.PlanTableSource right_plan, int join_type, Expression on_expr)	Sets the right join information for this plan.
private static void	Planner.substituteAliasedVariables(Expression expression, java.util.ArrayList s_col_list)	Substitutes any aliased variables in the given expression with the function name equivalent.

Constructors in com.mckoi.database.interpret with parameters of type Expression

Constructor	Description
ComplexSingleExpressionPlan(Variable v, Expression e)
ConstantExpressionPlan(Expression e)
ExhaustiveJoinExpressionPlan(Expression e)
ExhaustiveSelectExpressionPlan(Expression e)
ExhaustiveSubQueryExpressionPlan(java.util.List vars, Expression e)
SimplePatternExpressionPlan(Variable v, Expression e)
SimpleSelectExpressionPlan(Variable v, Operator op, Expression e)
SimpleSingleExpressionPlan(Variable v, Expression e)
SimpleSubQueryExpressionPlan(Expression e)
StandardJoinExpressionPlan(Expression e)
SubLogicExpressionPlan(Expression e)

Uses of Expression in com.mckoi.database.sql

Methods in com.mckoi.database.sql that return Expression

Modifier and Type	Method	Description
Expression	SQL.DoExpression()
Expression	SQL.DoNonBooleanExpression()
Expression[]	SQL.ExpressionList()
Expression	SQL.ExpressionTest()
Expression[]	SQL.FunctionParams()
static Expression	Util.normalize(Expression exp)	Normalizes the Expression by removing all NOT operators and altering the expression as appropriate.
private static Expression	Util.normalize(Expression exp, boolean inverse)	Normalizes the Expression by removing all NOT operators and altering the expression as appropriate.
Expression	SQL.parseExpression()
private static Expression	Util.standardInverse(Expression exp)	Returns an expression that is (exp) = false which is the natural inverse of all expressions.

Methods in com.mckoi.database.sql with parameters of type Expression

Modifier and Type	Method	Description
void	SQL.addOperatorToExpression(Expression exp, Operator op)	Helper for expression parsing.
void	SQL.BetweenPredicate(Expression exp, java.util.Stack stack)
void	SQL.BooleanOperator(Expression exp, java.util.Stack stack)
void	SQL.expEnd(Expression exp, java.util.Stack stack)	Helper for expression parsing.
void	SQL.expEndParen(Expression exp, java.util.Stack stack)	Helper for expression parsing.
void	SQL.expOperator(Expression exp, java.util.Stack stack, Operator op)	Helper for expression parsing.
void	SQL.expression(Expression exp, java.util.Stack stack)	Parse an expression.
static java.lang.String	Util.expressionListToString(Expression[] list)	Returns an array of Expression objects as a comma deliminated string.
void	SQL.flushOperatorStack(Expression exp, java.util.Stack stack, int precedence)	Flush the operator stack until the stack is either empty or the top element is either a "(" or of a precedence lower than the given precedence.
void	SQL.nonBooleanExpression(Expression exp, java.util.Stack stack)	Parses a non-boolean expression.
static Expression	Util.normalize(Expression exp)	Normalizes the Expression by removing all NOT operators and altering the expression as appropriate.
private static Expression	Util.normalize(Expression exp, boolean inverse)	Normalizes the Expression by removing all NOT operators and altering the expression as appropriate.
void	SQL.NumericOperator(Expression exp, java.util.Stack stack)
void	SQL.Operand(Expression exp, java.util.Stack stack)
void	SQL.OpPart(Expression exp, java.util.Stack stack)
static FunctionDef	Util.resolveFunctionName(java.lang.String name, Expression[] exp_list)	Returns a Function object that represents the name and expression list (of parameters) of a function.
private static Expression	Util.standardInverse(Expression exp)	Returns an expression that is (exp) = false which is the natural inverse of all expressions.
void	SQL.StringOperator(Expression exp, java.util.Stack stack)
void	SQL.SubQueryExpression(Expression exp, java.util.Stack stack)
void	SQL.SubQueryOperator(Expression exp, java.util.Stack stack)
static TObject	Util.toArrayParamObject(Expression[] arr)	Converts an expression array to an array type that can be added to an expression.