Uses of Interface
simpledb.query.Constant

Packages that use Constant

simpledb.index
simpledb.index.btree
simpledb.index.hash
simpledb.index.query
simpledb.materialize
simpledb.multibuffer
simpledb.parse
simpledb.query

Uses of Constant in simpledb.index

Methods in simpledb.index with parameters of type Constant

void	Index.beforeFirst(Constant searchkey) Positions the index before the first record having the specified search key.
void	Index.delete(Constant dataval, RID datarid) Deletes the index record having the specified dataval and dataRID values.
void	Index.insert(Constant dataval, RID datarid) Inserts an index record having the specified dataval and dataRID values.

Uses of Constant in simpledb.index.btree

Methods in simpledb.index.btree that return Constant

Constant	DirEntry.dataVal() Returns the dataval component of the entry
Constant	BTreePage.getDataVal(int slot) Returns the dataval of the record at the specified slot.

Methods in simpledb.index.btree with parameters of type Constant

void	BTreeIndex.beforeFirst(Constant searchkey) Traverses the directory to find the leaf block corresponding to the specified search key.
void	BTreeIndex.delete(Constant dataval, RID datarid) Deletes the specified index record.
int	BTreePage.findSlotBefore(Constant searchkey) Calculates the position where the first record having the specified search key should be, then returns the position before it.
void	BTreeIndex.insert(Constant dataval, RID datarid) Inserts the specified record into the index.
void	BTreePage.insertDir(int slot, Constant val, int blknum) Inserts a directory entry at the specified slot.
void	BTreePage.insertLeaf(int slot, Constant val, RID rid) Inserts a leaf index record at the specified slot.
int	BTreeDir.search(Constant searchkey) Returns the block number of the B-tree leaf block that contains the specified search key.

Constructors in simpledb.index.btree with parameters of type Constant

BTreeLeaf(Block blk, TableInfo ti, Constant searchkey, Transaction tx)
Opens a page to hold the specified leaf block.

DirEntry(Constant dataval, int blocknum)
Creates a new entry for the specified dataval and block number.

Uses of Constant in simpledb.index.hash

Methods in simpledb.index.hash with parameters of type Constant

void	HashIndex.beforeFirst(Constant searchkey) Positions the index before the first index record having the specified search key.
void	HashIndex.delete(Constant val, RID rid) Deletes the specified record from the table scan for the bucket.
void	HashIndex.insert(Constant val, RID rid) Inserts a new record into the table scan for the bucket.

Uses of Constant in simpledb.index.query

Methods in simpledb.index.query that return Constant

Constant	IndexSelectScan.getVal(String fldname) Returns the value of the field of the current data record.
Constant	IndexJoinScan.getVal(String fldname) Returns the Constant value of the specified field.

Constructors in simpledb.index.query with parameters of type Constant

IndexSelectPlan(Plan p, IndexInfo ii, Constant val, Transaction tx)
Creates a new indexselect node in the query tree for the specified index and selection constant.

IndexSelectScan(Index idx, Constant val, TableScan ts)
Creates an index select scan for the specified index and selection constant.

Uses of Constant in simpledb.materialize

Methods in simpledb.materialize that return Constant

Constant	SortScan.getVal(String fldname) Gets the Constant value of the specified field of the current scan.
Constant	MergeJoinScan.getVal(String fldname) Returns the value of the specified field.
Constant	GroupValue.getVal(String fldname) Returns the Constant value of the specified field in the group.
Constant	GroupByScan.getVal(String fldname) Gets the Constant value of the specified field.
Constant	MaxFn.value() Returns the current maximum.
Constant	CountFn.value() Returns the current count.
Constant	AggregationFn.value() Returns the computed aggregation value.

Uses of Constant in simpledb.multibuffer

Methods in simpledb.multibuffer that return Constant

Constant	MultiBufferProductScan.getVal(String fldname) Returns the value of the specified field.
Constant	ChunkScan.getVal(String fldname)

Uses of Constant in simpledb.parse

Methods in simpledb.parse that return Constant

Constant

Parser.constant()

Methods in simpledb.parse that return types with arguments of type Constant

List<Constant>

InsertData.vals() Returns a list of values for the specified fields.

Constructor parameters in simpledb.parse with type arguments of type Constant

InsertData(String tblname, List<String> flds, List<Constant> vals)
Saves the table name and the field and value lists.

Uses of Constant in simpledb.query

Classes in simpledb.query that implement Constant

class	IntConstant The class that wraps Java ints as database constants.
class	StringConstant The class that wraps Java strings as database constants.

Methods in simpledb.query that return Constant

Constant	FieldNameExpression.asConstant() This method should never be called.
Constant	Expression.asConstant() Returns the constant corresponding to a constant expression.
Constant	ConstantExpression.asConstant() Unwraps the constant and returns it.
Constant	Term.equatesWithConstant(String fldname) Determines if this term is of the form "F=c" where F is the specified field and c is some constant.
Constant	Predicate.equatesWithConstant(String fldname) Determines if there is a term of the form "F=c" where F is the specified field and c is some constant.
Constant	FieldNameExpression.evaluate(Scan s) Evaluates the field by getting its value in the scan.
Constant	Expression.evaluate(Scan s) Evaluates the expression with respect to the current record of the specified scan.
Constant	ConstantExpression.evaluate(Scan s) Returns the constant, regardless of the scan.
Constant	TableScan.getVal(String fldname) Returns the value of the specified field, as a Constant.
Constant	SelectScan.getVal(String fldname)
Constant	Scan.getVal(String fldname) Returns the value of the specified field in the current record.
Constant	ProjectScan.getVal(String fldname)
Constant	ProductScan.getVal(String fldname) Returns the value of the specified field.

Methods in simpledb.query with parameters of type Constant

int	StringConstant.compareTo(Constant c)
int	IntConstant.compareTo(Constant c)
void	UpdateScan.setVal(String fldname, Constant val) Modifies the field value of the current record.
void	TableScan.setVal(String fldname, Constant val) Sets the value of the specified field, as a Constant.
void	SelectScan.setVal(String fldname, Constant val)

Constructors in simpledb.query with parameters of type Constant

ConstantExpression(Constant c)
Creates a new expression by wrapping a constant.