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 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 Expression
Transaction.CheckExpression. expression
The expression to check.static Expression[]
FunctionFactory. GLOB_LIST
Represents a function argument * for glob's such as 'count(*)'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.Expression
Expression. concat(Expression expr)
Merges an expression with this expression.void
Expression. copyTextFrom(Expression e)
Copies the text from the given expression.Table
Table. exhaustiveSelect(QueryContext context, Expression exp)
Exhaustively searches through this table for rows that match the expression given.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.Constructors in com.mckoi.database with parameters of type Expression Constructor Description 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.Assignment(Variable variable, Expression expression)
Constructs the assignment.ConstantSelectNode(QueryPlanNode child, Expression exp)
CreateFunctionsNode(QueryPlanNode child, Expression[] function_list, java.lang.String[] name_list)
Constructor.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.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.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).JoinNode(QueryPlanNode left, QueryPlanNode right, Variable left_var, Operator join_op, Expression right_expression)
JoinPart(int type, Expression on_expression)
Constructs the JoinPart.MultiColumnEquiSelectNode(QueryPlanNode child, Variable[] columns, Expression[] values)
RangeSelectNode(QueryPlanNode child, Expression exp)
SimplePatternSelectNode(QueryPlanNode child, Expression exp)
SimpleSelectNode(QueryPlanNode child, Variable left_var, Operator op, Expression right_expression)
-
Uses of Expression in com.mckoi.database.interpret
Fields in com.mckoi.database.interpret declared as Expression Modifier and Type Field Description Expression
ByColumn. exp
The expression that we are ordering by.Expression
SelectColumn. expression
The expression of this column.Methods in com.mckoi.database.interpret that return Expression Modifier and Type Method Description 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
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.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. -
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.Expression
SQL. parseExpression()
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.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.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.
-