Uses of Class
edu.caltech.nanodb.queryast.FromClause

Packages that use FromClause

Package	Description
edu.caltech.nanodb.queryast
edu.caltech.nanodb.queryeval	This package contains the query-evaluation components of the database.

Uses of FromClause in edu.caltech.nanodb.queryast

Fields in edu.caltech.nanodb.queryast declared as FromClause

Modifier and Type	Field	Description
private FromClause	SelectClause.fromClause	This field holds a hierarchy of one or more base and derived relations that produce the rows considered by this SELECT clause.
private FromClause	FromClause.leftChild	If this FROM clause is a join expression then this references the left child of the join.
private FromClause	FromClause.rightChild	If this FROM clause is a join expression then this references the right child of the join.

Methods in edu.caltech.nanodb.queryast that return FromClause

Modifier and Type	Method	Description
FromClause	SelectClause.getFromClause()	Retrieves the from clause for this select clause.
FromClause	FromClause.getLeftChild()	If the from-clause is a join expression, this method returns the left child-clause.
FromClause	FromClause.getRightChild()	If the from-clause is a join expression, this method returns the right child-clause.

Methods in edu.caltech.nanodb.queryast with parameters of type FromClause

Modifier and Type	Method	Description
void	SelectClause.setFromClause(FromClause fromClause)	Sets the hierarchy of base and derived relations that produce the rows considered by this SELECT clause.

Constructors in edu.caltech.nanodb.queryast with parameters of type FromClause

Constructor	Description
FromClause(FromClause left, FromClause right, JoinType type)	Construct a new FROM clause of type FromClause.ClauseType.JOIN_EXPR.

Uses of FromClause in edu.caltech.nanodb.queryeval

Methods in edu.caltech.nanodb.queryeval with parameters of type FromClause

Modifier and Type	Method	Description
private void	CostBasedJoinPlanner.collectDetails(FromClause fromClause, java.util.HashSet<Expression> conjuncts, java.util.ArrayList<FromClause> leafFromClauses)	This helper method pulls the essential details for join optimization out of a FROM clause.
private CostBasedJoinPlanner.JoinComponent	CostBasedJoinPlanner.makeJoinPlan(FromClause fromClause, java.util.Collection<Expression> extraConjuncts)	Given the top-level FromClause for a SELECT-FROM-WHERE block, this helper generates an optimal join plan for the FromClause.
private PlanNode	CostBasedJoinPlanner.makeLeafPlan(FromClause fromClause, java.util.Collection<Expression> conjuncts, java.util.HashSet<Expression> leafConjuncts)	Constructs a plan tree for evaluating the specified from-clause.

Method parameters in edu.caltech.nanodb.queryeval with type arguments of type FromClause

Modifier and Type	Method	Description
private void	CostBasedJoinPlanner.collectDetails(FromClause fromClause, java.util.HashSet<Expression> conjuncts, java.util.ArrayList<FromClause> leafFromClauses)	This helper method pulls the essential details for join optimization out of a FROM clause.
private java.util.ArrayList<CostBasedJoinPlanner.JoinComponent>	CostBasedJoinPlanner.generateLeafJoinComponents(java.util.Collection<FromClause> leafFromClauses, java.util.Collection<Expression> conjuncts)	This helper method performs the first step of the dynamic programming process to generate an optimal join plan, by generating a plan for every leaf from-clause identified from analyzing the query.