Class for all supported DBMS operations on relations. More...

#include <query.h>

Static Public Member Functions
static void	Select (const std::string &result, int projCnt, const attrInfo projNames[], const attrInfo attr, Operator op, const void attrValue)
static void	Join (const std::string &result, int projCnt, const attrInfo projNames[], const attrInfo attr1, Operator op, const attrInfo attr2)
static void	IndexSelect (const std::string &result, int projCnt, const attrInfo projNames[], const attrInfo attr, Operator op, const void attrValue)
static void	ScanSelect (const std::string &result, int projCnt, const attrInfo projNames[], const attrInfo attr, Operator op, const void attrValue)

Detailed Description

Class for all supported DBMS operations on relations.

Definition at line 18 of file query.h.

Member Function Documentation

void badgerdb::Operators::Join	(	const std::string &	result,
		int	projCnt,
		const attrInfo	projNames[],
		const attrInfo *	attr1,
		Operator	op,
		const attrInfo *	attr2
	)		`[static]`

Join Operator. Performs Simple Nested Loops join or Index nested Loops join or Sort Merge Join depending upon the join predicates and availability of indices. Get attribute description for all projection attributes and predicate attributes from attribute catalog, compute the length of record for the 'result' relation. Use one of aforementioned join algorithms to compute the result.

Definition at line 19 of file join.cpp.

{
}

void badgerdb::Operators::Select	(	const std::string &	result,
		int	projCnt,
		const attrInfo	projNames[],
		const attrInfo *	attr,
		Operator	op,
		const void *	attrValue
	)		`[static]`

Select Operator. Performs scan select or index select depending upon the select predicates and availability of indices. Get attribute description from relcat relation for all the projection attributes. Compute length of records for the 'result' relation which will only contain projection attributes. Perform one of scan select and index select operations which will insert records in the result relation corresponding to expected output.

Definition at line 27 of file select.cpp.

  {
   
    if((op == Operator(EQ))){ //NEED TO CHECK IF THERE IS AN INDEX ALSO
      //INDEX SELECT
      IndexSelect(result, projCnt, projNames, attr, op, attrValue);
    }else{
      //Scan select
      //printAttrInfo(&projNames[0]);
      //printAttrInfo(attr);
      ScanSelect(result, projCnt, projNames, attr, op, attrValue);
    }
    
    
  }

The documentation for this class was generated from the following files:

/afs/cs.wisc.edu/u/n/w/nwilliam/private/workspace/Quut/src/query.h
/afs/cs.wisc.edu/u/n/w/nwilliam/private/workspace/Quut/src/join.cpp
/afs/cs.wisc.edu/u/n/w/nwilliam/private/workspace/Quut/src/select.cpp

Static Public Member Functions

Detailed Description

Member Function Documentation