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Main.java
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package dubstep;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeMap;
import net.sf.jsqlparser.eval.Eval;
import net.sf.jsqlparser.expression.BinaryExpression;
import net.sf.jsqlparser.expression.BooleanValue;
import net.sf.jsqlparser.expression.DateValue;
import net.sf.jsqlparser.expression.DoubleValue;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.Function;
import net.sf.jsqlparser.expression.LongValue;
import net.sf.jsqlparser.expression.PrimitiveValue;
import net.sf.jsqlparser.expression.PrimitiveValue.InvalidPrimitive;
import net.sf.jsqlparser.expression.StringValue;
import net.sf.jsqlparser.expression.operators.conditional.AndExpression;
import net.sf.jsqlparser.expression.operators.relational.EqualsTo;
import net.sf.jsqlparser.expression.operators.relational.ExpressionList;
import net.sf.jsqlparser.parser.CCJSqlParser;
import net.sf.jsqlparser.parser.ParseException;
import net.sf.jsqlparser.schema.Column;
import net.sf.jsqlparser.statement.Statement;
import net.sf.jsqlparser.schema.Table;
import net.sf.jsqlparser.statement.create.table.ColumnDefinition;
import net.sf.jsqlparser.statement.create.table.CreateTable;
import net.sf.jsqlparser.statement.create.table.Index;
import net.sf.jsqlparser.statement.select.AllColumns;
import net.sf.jsqlparser.statement.select.FromItem;
import net.sf.jsqlparser.statement.select.Join;
import net.sf.jsqlparser.statement.select.OrderByElement;
import net.sf.jsqlparser.statement.select.PlainSelect;
import net.sf.jsqlparser.statement.select.Select;
import net.sf.jsqlparser.statement.select.SelectBody;
import net.sf.jsqlparser.statement.select.SelectExpressionItem;
import net.sf.jsqlparser.statement.select.SelectItem;
import net.sf.jsqlparser.statement.select.SubSelect;
class Main2 extends Main implements Comparator<List<Integer>> {
@Override
public int compare(List<Integer> x, List<Integer> y) {
// TODO Auto-generated method stubString firstString = tableData.get(sortOnTable).get(x.get(x.size()-1))[sortIndex];
String firstString = tableData.get(sortOnTable).get(x.get(x.size()-1))[sortIndex];
String secondString = tableData.get(sortOnTable).get(y.get(y.size()-1))[sortIndex];
if ((firstString).compareTo((secondString)) > 0)
return 1;
else
return -1;
}
}
class Main3 extends Main implements Comparator<String[]>{
public int compare(String[] x, String[] y) {
int index = order.get(o);
boolean isAsc = asc.get(o).equals("ASC");
String format = orderDataTypes.get(o);
switch (format) {
case "string":
case "STRING":
case "varchar":
case "VARCHAR":
case "char":
case "CHAR": {
format = "String";
break;
}
case "int":
case "INT":
case "decimal":
case "DECIMAL": {
format = "Double";
break;
}
case "date":
case "DATE": {
format = "Date";
break;
}
}
double first, second;
String firstString, secondString;
if (format.equals("Double")) {
first = Double.parseDouble(x[index]);
second = Double.parseDouble(y[index]);
if (first == second) {
if (order.size() - 1 > o) {
o++;
int comparisonResult = compare(x, y);
if (comparisonResult != 0)
o = 0;
return comparisonResult;
} else {
o = 0;
return 0;
}
} else {
if (isAsc) {
if (first < second)
return -1;
else
return 1;
} else {
if (first < second)
return 1;
else
return -1;
}
}
} else if (format.equals("String")) {
firstString = x[index];
secondString = y[index];
if ((firstString).compareTo((secondString)) == 0) {
if (order.size() - 1 > o) {
o++;
int comparisonResult = compare(x, y);
if (comparisonResult != 0)
o = 0;
return comparisonResult;
} else {
o = 0;
return 0;
}
} else {
if (isAsc) {
if ((firstString).compareTo((secondString)) < 0)
return -1;
else
return 1;
} else {
if ((firstString).compareTo((secondString)) < 0)
return 1;
else
return -1;
}
}
} else if (format.equals("Date")) {
Date date1 = null, date2 = null;
try {
date1 = sdf.parse(x[index]);
date2 = sdf.parse(y[index]);
} catch (Exception e) {
System.out.println("Exception");
}
if (date1.compareTo(date2) == 0) {
if (order.size() - 1 > o) {
o++;
int comparisonResult = compare(x, y);
if (comparisonResult != 0)
o = 0;
return comparisonResult;
} else {
o = 0;
return 0;
}
} else {
if (isAsc) {
if (date1.compareTo(date2) > 0)
return 1;
else
return -1;
} else {
if (date1.compareTo(date2) > 0)
return -1;
else
return 1;
}
}
}
return 0;
}
}
public class Main extends Eval {
public static HashMap<String, HashMap<String, Integer>> tables = null;
static Map<String, Map> colNames=new HashMap<>();
static Map<String, ArrayList<String>> colDataTypes=new HashMap<>();
static Map<String, TreeMap<String, Integer>> indexValues;
static List<List<Integer>> records;
static ArrayList<String[]> data;
static Map<String, ArrayList<String[]>> tableData=new HashMap();
static Iterator<String[]> recordIter;
static Map<String, String[]> jointRows;
static String sortOnTable, sortOnColumn, sortFormat;
static int sortIndex;
static String[] rows;
static int columnPos;
static Long limit;
static List<OrderByElement> orderBy;
static List<String> orderDataTypes;
static List<ColumnDefinition> columns;
static CreateTable create;
static String tableName;
static ArrayList<String> printResults = new ArrayList<String>();
static Double[] func = null;
static boolean previousWhereClause = false;
static boolean isInMem = false;
static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
static boolean evalPart2 = false, evalPart3 = false;
static String fileName = "";
static File scanFile;
static File tempFile;
static File resultsFile = new File("results.txt");
static PrintWriter tempWrite;
static PrintWriter resultsWrite;
static Scanner tempScan;
static Scanner resultsScan;
static Scanner scan;
static File printResultsFile = new File("printResults.txt");
static Scanner printResultsScanner;
static PrintWriter printResultsWriter;
static TreeMap<String,TreeMap<String, TreeMap<String,ArrayList<Integer>>>> indexes=new TreeMap<>();
static ArrayList<Integer> order;
static ArrayList<String> asc;
static int o = 0;
static Comparator<String[]> sorting = new Main3();
static Comparator<List<Integer>> joinSort = new Main2();
static List<String[]> results = new ArrayList<String[]>();
// static ArrayList<String[]> subresults=new ArrayList<>();
static String resultRow = "";
static Runtime runtime = Runtime.getRuntime();
static Main eval = new Main();
public static void main(String[] args) throws Exception {
System.out.print("$>");
if (args[1].contains("in-mem"))
isInMem = true;
Scanner scanner = new Scanner((System.in));
String ip = "";
while (scanner.hasNextLine()) {
ip = ip + " " + scanner.nextLine();
if (!ip.contains(";"))
continue;
StringReader input = new StringReader(ip);
ip = "";
CCJSqlParser parser = new CCJSqlParser(input);
Statement query;
while ((query = parser.Statement()) != null) {
if (query instanceof CreateTable) {
//records = new ArrayList<String[]>();
create = (CreateTable) query;
tableName = create.getTable().getName();
data=new ArrayList<>();
columns = new ArrayList<ColumnDefinition>();
columns = create.getColumnDefinitions();
Map<String, Integer> colPosition = new HashMap<String, Integer>();
ArrayList<String> colDataType = new ArrayList<String>();
colDataType.clear();
//scanFile = new File("U:\\eclipse_workspace\\Junaid\\Checkpoint3\\src\\dubstep\\data\\"+ tableName + ".csv");
//scanFile = new File("C:\\Users\\tsankhe\\Desktop\\Checkpoint3\\"+ tableName + ".csv");
//scanFile= new File("/Users/mitalibhiwande/Desktop/data/data1/"+tableName+".csv");
scanFile = new File("data/" + tableName + ".csv");
scan = new Scanner(scanFile);
scan.useDelimiter("|");
for (int i = 0; i < columns.size(); i++) {
colPosition.put(columns.get(i).getColumnName(), i);
colDataType.add(columns.get(i).getColDataType().getDataType());
}
colNames.put(tableName, colPosition);
colDataTypes.put(tableName, colDataType);
if (isInMem) {
// System.out.println("aagaya!!");
String row = "";
while (scan.hasNextLine() && ((row = scan.nextLine()) != null))
data.add(row.split("\\|"));
scan.close();
inMemIndexing();
//System.out.println(indexes);
} else {
if (create.getIndexes() != null)
eval.indexing();
}
} else if (query instanceof Select) {
Expression e = null;
SelectBody body = ((Select) query).getSelectBody();
PlainSelect plain = (PlainSelect) body;
tableName = ((Table) plain.getFromItem()).getName();
//System.out.println(tableName);
scan = new Scanner(scanFile);
printResults.clear();
func = null;
limit = plain.getLimit() != null ? plain.getLimit().getRowCount() : Long.MAX_VALUE;
orderBy = plain.getOrderByElements();
previousWhereClause = false;
if (isInMem) {
//System.out.println(tableData.get(tableName));
recordIter = tableData.get(tableName).iterator();
executeSel(plain);
List<OrderByElement> orderBy = plain.getOrderByElements();
limit = plain.getLimit() != null ? plain.getLimit().getRowCount() : Long.MAX_VALUE;
executeprint(plain);
} else {
printResultsWriter = new PrintWriter(printResultsFile, "UTF-8");
printResultsWriter.print("");
printResultsWriter.close();
executeOnDisk(plain);
executeprintOnDisk(plain);
}
}
}
System.out.print("$>");
results.clear();
}
scanner.close();
}
public static void inMemIndexing(){
ArrayList<Integer> intermediateInt;
String intermediateString;
int pos=0;
List<Index> indexes1 = create.getIndexes();
List<String> indexedColumns = new ArrayList<String>();
if(indexes1!=null)
for (Index i : indexes1) {
if (i.getType().toString().equalsIgnoreCase("PRIMARY KEY") ) {
for (String l : i.getColumnsNames()) {
indexedColumns.add(l);
//mapArray.add(new TreeMap<String, Integer>());
}
}
}
indexes1 = null;
for(ColumnDefinition c: columns)
if(c.getColumnSpecStrings()!=null)
indexedColumns.add(c.getColumnName());
//System.out.println("Indexwdcolumns "+ indexedColumns);
TreeMap<String,TreeMap<String,ArrayList<Integer>>> schema=new TreeMap<>();
for(String c: indexedColumns)
{
TreeMap<String, ArrayList<Integer>> temp=new TreeMap<>();
//String colName=c.getColumnName();
recordIter = data.iterator();
int rowNum = 0;
while(recordIter.hasNext())
{
rows = recordIter.next();
//columnPos = (int) colNames.get(tableName).get(c);
intermediateString = rows[pos];
if(temp.containsKey(intermediateString))
{
ArrayList<Integer> rowsList=temp.get(intermediateString);
rowsList.add(rowNum);
}
else
{
intermediateInt = new ArrayList<Integer>();
intermediateInt.add(rowNum);
temp.put(intermediateString.toUpperCase(), intermediateInt);
}
rowNum++;
}
schema.put(c.toUpperCase(), temp);
temp=null;
pos++;
}
indexes.put(tableName, schema);
tableData.put(tableName,data);
//System.out.println("tableData: "+tableData);
schema=null;
}
public static void executeSel(PlainSelect select) throws Exception {
FromItem from = select.getFromItem();
Expression whereClause = null;
boolean whereResult = false;
whereClause = select.getWhere();
records = new ArrayList<>();
if (select.getJoins() != null) {
List<Join> joins = select.getJoins();
List<FromItem> fromItemList = new ArrayList<FromItem>();
ArrayList<Expression> joinClauses = new ArrayList<Expression>();
ArrayList<Expression> joinLefts = new ArrayList<Expression>();
ArrayList<Expression> joinRights = new ArrayList<Expression>();
fromItemList.add(from);
for (Join join : joins) {
fromItemList.add(join.getRightItem());
joinClauses.add(null);
joinLefts.add(null);
joinRights.add(null);
}
Expression a = whereClause;
while (a != null) {
Expression toCheck;
if (a instanceof AndExpression)
toCheck = ((AndExpression) a).getRightExpression();
else
toCheck = a;
for (int i = 0; i < fromItemList.size() - 1; i++) {
if (toCheck.toString().contains(fromItemList.get(i).toString())
&& (toCheck.toString().contains(fromItemList.get(i + 1).toString()))) {
joinClauses.set(i, (toCheck));
}
}
for (int i = 0; i < fromItemList.size() - 1; i++) {
if (toCheck.toString().contains(fromItemList.get(i).toString()) && !joinClauses.contains(toCheck)
&& !joinLefts.contains(toCheck) && !joinRights.contains(toCheck)) {
if (joinLefts.get(i) != null)
joinLefts.set(i, new AndExpression(((AndExpression) a).getRightExpression(), joinLefts.get(i)));
else
joinLefts.set(i, ((AndExpression) a).getRightExpression());
} else if (toCheck.toString().contains(fromItemList.get(i + 1).toString())
&& !joinClauses.contains(toCheck) && !joinLefts.contains(toCheck) && !joinRights.contains(toCheck)) {
if (joinRights.get(i) != null)
joinRights.set(i, new AndExpression(((AndExpression) a).getRightExpression(), joinRights.get(i)));
else
joinRights.set(i, ((AndExpression) a).getRightExpression());
}
}
if (a instanceof AndExpression)
a = ((AndExpression) a).getLeftExpression();
else
a = null;
}
for (int i = 0; i < fromItemList.size() - 1; i++) {
//System.out.println("Executing join on: " + fromItemList.get(i) + " and: " + fromItemList.get(i + 1)+ " joinClause: " + joinClauses.get(i) + " left: " + joinLefts.get(i) + " joinRights: "+ joinRights.get(i));
executeJoin(i ,fromItemList.get(i), fromItemList.get(i + 1), joinClauses.get(i), joinLefts.get(i),joinRights.get(i));
}
}
//Can do a parallel sort-merge join only if the joining condition is on the same column from each table
if (from instanceof SubSelect) {
SelectBody subbody = ((SubSelect) from).getSelectBody();
PlainSelect subsel = (PlainSelect) subbody;
executeSel(subsel);
}
List<Function> functions = new ArrayList<Function>();
if (!(select.getSelectItems().get(0) instanceof AllColumns)) {
for (int i = 0; i < select.getSelectItems().size(); i++) {
if ((Expression) ((SelectExpressionItem) select.getSelectItems().get(i))
.getExpression() instanceof Function) {
functions.add((Function) ((SelectExpressionItem) select.getSelectItems().get(i)).getExpression());
}
}
}
if (whereClause != null && select.getJoins() == null ) {
previousWhereClause = true;
ArrayList<String[]> temp = new ArrayList<>();
while (recordIter.hasNext() && (orderBy != null ? true : temp.size() < limit)) {
rows = recordIter.next();
whereResult = eval.eval(whereClause).toBool();
if (whereResult)
temp.add(rows);
}
rows = null;
results.clear();
results.addAll(temp);
temp = null;
} else {
if (!previousWhereClause) {
results.clear();
//results.addAll(records);
}
}
recordIter = results.iterator();
if (select.getGroupByColumnReferences() != null && results.size() > 0) {
executeGroupBy(select);
} else {
if (functions.size() > 0 && results.size() > 0) {
executeAggregate(select, functions);
}
}
if (select.getOrderByElements() != null) {
executeOrder(select, recordIter);
}
}
private static void executeJoin(int joinNum, FromItem fromItem1, FromItem fromItem2, Expression joinClause, Expression joinLeft,
Expression joinRight) throws Exception {
String useSortedLeft = "";
String useSortedRight = "";
String sortLeftOn = "";
ArrayList<ArrayList<Integer>> toAdd = new ArrayList<ArrayList<Integer>>();
jointRows = new HashMap<String, String[]>();
if (records.size() == 0) {
for (Object o : colNames.get(fromItem1.toString()).keySet()) {
if (joinClause.toString().contains(fromItem1.toString() + "." + o.toString())) {
useSortedLeft = o.toString();
break;
}
}
}
else{
for (Object o : colNames.get(fromItem1.toString()).keySet()) {
if (joinClause.toString().contains(fromItem1.toString() + "." + o.toString())) {
sortLeftOn = o.toString();
useSortedLeft = o.toString();
break;
}
}
}
for (Object o : colNames.get(fromItem2.toString()).keySet()) {
if (joinClause.toString().contains(fromItem2.toString() + "." + o.toString())) {
useSortedRight = o.toString();
break;
}
}
if(!useSortedLeft.equals(""))
if(indexes.get(fromItem1.toString().toUpperCase()).equals(""))
{
TreeMap<String,TreeMap<String,ArrayList<Integer>>> schema=new TreeMap<>();
TreeMap<String, ArrayList<Integer>> temp=new TreeMap<>();
//String colName=c.getColumnName();
recordIter = tableData.get(fromItem1.toString().toUpperCase()).iterator();
int rowNum = 0;
int pos = (int) colNames.get(fromItem1.toString().toUpperCase()).get(useSortedLeft.toUpperCase());
while(recordIter.hasNext())
{
rows = recordIter.next();
//columnPos = (int) colNames.get(tableName).get(c);
String intermediateString = rows[pos];
if(temp.containsKey(intermediateString))
{
ArrayList<Integer> rowsList=temp.get(intermediateString);
rowsList.add(rowNum);
}
else
{
ArrayList<Integer> intermediateInt = new ArrayList<Integer>();
intermediateInt.add(rowNum);
temp.put(intermediateString.toUpperCase(), intermediateInt);
}
rowNum++;
}
schema.put(useSortedLeft.toUpperCase(), temp);
temp=null;
pos++;
indexes.put(fromItem1.toString().toUpperCase(), schema);
}
if(!useSortedRight.equals(""))
if(indexes.get(fromItem2.toString().toUpperCase()).get(useSortedRight).keySet()==null)
{
TreeMap<String,TreeMap<String,ArrayList<Integer>>> schema=new TreeMap<>();
TreeMap<String, ArrayList<Integer>> temp=new TreeMap<>();
//String colName=c.getColumnName();
recordIter = tableData.get(fromItem2.toString().toUpperCase()).iterator();
int rowNum = 0;
int pos = (int) colNames.get(fromItem2.toString().toUpperCase()).get(useSortedRight.toUpperCase());
while(recordIter.hasNext())
{
rows = recordIter.next();
//columnPos = (int) colNames.get(tableName).get(c);
String intermediateString = rows[pos];
if(temp.containsKey(intermediateString))
{
ArrayList<Integer> rowsList=temp.get(intermediateString);
rowsList.add(rowNum);
}
else
{
ArrayList<Integer> intermediateInt = new ArrayList<Integer>();
intermediateInt.add(rowNum);
temp.put(intermediateString.toUpperCase(), intermediateInt);
}
rowNum++;
}
schema.put(useSortedRight.toUpperCase(), temp);
temp=null;
pos++;
indexes.put(fromItem2.toString().toUpperCase(), schema);
}
if (joinNum==0) {
//toAdd.add(new ArrayList<Integer>());
records.add(new ArrayList<>());
/*System.out.println("fromItem1: "+fromItem1.toString().toUpperCase());
System.out.println("useSL: "+useSortedLeft);
System.out.println("joinLeft: "+joinLeft);
System.out.println(
"Values to check: " + indexes.get(fromItem1.toString().toUpperCase()).get(useSortedLeft).keySet());
*/
if(joinLeft!=null){
//System.out.println("from " + fromItem1.toString().toUpperCase());
//System.out.println("sortleft "+ useSortedLeft);
//System.out.println("index on "+ indexes.get(fromItem1.toString().toUpperCase()).keySet());
for (String s : indexes.get(fromItem1.toString().toUpperCase()).get(useSortedLeft).keySet()) {
for(int x: indexes.get(fromItem1.toString().toUpperCase()).get(useSortedLeft).get(s)){
rows = tableData.get(fromItem1.toString().toUpperCase()).get(x);
if (eval.eval(joinLeft).toBool()) {
records.get(records.size() - 1).add(x);
}
}
}
}
else
{ //System.out.println("first:"+ indexes.get(fromItem1.toString().toUpperCase()));
for (String s : indexes.get(fromItem1.toString().toUpperCase()).get(useSortedLeft).keySet()) {
for(int x: indexes.get(fromItem1.toString().toUpperCase()).get(useSortedLeft).get(s))
records.get(records.size() - 1).add(x);
}
//System.out.println("Records now contains: " + records);
}
}
else
{
sortOnTable = fromItem1.toString().toUpperCase();
sortOnColumn = sortLeftOn;
sortIndex = (int) colNames.get(sortOnTable).get(sortOnColumn);
//System.out.println("sortOnTable: "+sortOnTable+" sortOnColumn: "+sortOnColumn+" sortIndex: "+sortIndex+" sortFormat: "+sortFormat);
Collections.sort(records, joinSort);
//System.out.println("records after sorting: "+records);
}
//toAdd.add(new ArrayList<Integer>());
records.add(new ArrayList<>());
/* System.out.println("FromItem2: " + fromItem2.toString().toUpperCase());
System.out.println("UseSR: " + useSortedRight);
System.out.println("JoinRight: " + joinRight);
System.out.println(
"Values to check: " + indexes.get(fromItem2.toString().toUpperCase()).get(useSortedRight).keySet());
*/
if(joinRight!=null){
//System.out.println("from " + fromItem2.toString().toUpperCase());
//System.out.println("sortleft "+ useSortedRight);
//System.out.println("index on "+ indexes.get(fromItem2.toString().toUpperCase()).keySet());
for (String s : indexes.get(fromItem2.toString().toUpperCase()).get(useSortedRight).keySet()) {
for (int x : indexes.get(fromItem2.toString().toUpperCase()).get(useSortedRight).get(s)) {
rows = tableData.get(fromItem2.toString().toUpperCase()).get(x);
if (eval.eval(joinRight).toBool())
records.get(records.size() - 1).add(x);
}
}
}
else{
for (String s : indexes.get(fromItem2.toString().toUpperCase()).get(useSortedRight).keySet())
for (int x : indexes.get(fromItem2.toString().toUpperCase()).get(useSortedRight).get(s))
records.get(records.size() - 1).add(x);
}
//System.out.println("Records now contains: " + records);
int columnPos1 = (int) colNames.get(fromItem1.toString().toUpperCase()).get(useSortedLeft.toUpperCase());
int columnPos2 = (int) colNames.get(fromItem2.toString().toUpperCase()).get(useSortedRight.toUpperCase());
int a = 0;
int b = 0;
if(joinNum==0){
while (a < records.get(records.size()-2).size() && b < records.get(records.size() - 1).size()) {
jointRows.put(fromItem1.toString(),
tableData.get(fromItem1.toString()).get(records.get(records.size() - 2).get(a)));
jointRows.put(fromItem2.toString(),
tableData.get(fromItem2.toString()).get(records.get(records.size() - 1).get(b)));
evalPart3 = true;
if (eval.eval(joinClause).toBool()) {
ArrayList<Integer> temp=new ArrayList<>();
for (int i = 0; i < records.size(); i++) {
if (i == records.size() - 1)
temp.add(records.get(i).get(b));
else
temp.add(records.get(i).get(a));
}
toAdd.add(temp);
b++;
}
else {
if (jointRows.get(fromItem1.toString().toUpperCase())[columnPos1]
.compareTo(jointRows.get(fromItem2.toString().toUpperCase())[columnPos2]) > 0)
b++;
else
a++;
}
}
}
else{
//System.out.println("joinClause: "+joinClause);
while (a < records.size()-1 && b < records.get(records.size() - 1).size()) {
/*System.out.println("JointRows1: ");
for(int i = 0; i<tableData.get(fromItem1.toString()).get(records.get(a).get(records.get(a).size()-1)).length; i++)
System.out.print(tableData.get(fromItem1.toString()).get(records.get(a).get(records.get(a).size()-1))[i]);
*/
jointRows.put(fromItem1.toString(),
tableData.get(fromItem1.toString()).get(records.get(a).get(records.get(a).size()-1)));
// System.out.println("JointRows2: ");
// for(int i = 0; i<tableData.get(fromItem2.toString()).get(records.get(records.size() - 1).get(b)).length; i++)
// System.out.print(tableData.get(fromItem2.toString()).get(records.get(records.size() - 1).get(b))[i]);
//
jointRows.put(fromItem2.toString(),
tableData.get(fromItem2.toString()).get(records.get(records.size() - 1).get(b)));
evalPart3 = true;
//System.out.println("jointRows: "+jointRows.);
if (eval.eval(joinClause).toBool()) {
//System.out.println("found match");
ArrayList<Integer> temp=new ArrayList<>();
temp.addAll(records.get(a));
temp.add(records.get(records.size()-1).get(b));
//System.out.println("left: "+records.get(a));
//System.out.println("right: "+records.get(records.size()-1).get(b));
toAdd.add(temp);
a++;
}
else {
if (jointRows.get(fromItem1.toString().toUpperCase())[columnPos1]
.compareTo(jointRows.get(fromItem2.toString().toUpperCase())[columnPos2]) > 0)
b++;
else
a++;
}
}
}
evalPart3 = false;
records.clear();
records.addAll(toAdd);
//System.out.println("post join records now contains: "+records.toString());
}
private static void executeAggregate(PlainSelect select, List<Function> functions)
throws InvalidPrimitive, SQLException {
// TODO Auto-generated method stub
if(select.getJoins() == null){
func = new Double[functions.size()];
for (int i = 0; i < functions.size(); i++) {
String funname = functions.get(i).getName();
switch (funname) {
case "SUM":
func[i] = 0.0;
break;
case "MAX":
func[i] = Double.MIN_VALUE;
break;
case "MIN":
func[i] = Double.MAX_VALUE;
break;
case "COUNT":
func[i] = 0.0;
case "AVG":
func[i] = 0.0;
}
}
int count = 0;
while (recordIter.hasNext()) {
rows = recordIter.next();
count++;
for (int i = 0; i < functions.size(); i++) {
String funname = functions.get(i).getName();
ExpressionList params = functions.get(i).getParameters();
Double temp = null;
if (!(funname.equalsIgnoreCase("COUNT"))) {
temp = eval.eval(params.getExpressions().get(0)).toDouble();
switch (funname) {
case "SUM": {
func[i] += temp;
break;
}
case "MIN": {
if (temp < func[i])
func[i] = temp;
break;
}
case "MAX": {
if (temp > func[i])
func[i] = temp;
break;
}
case "AVG": {
func[i] += temp;
break;
}
}
}
}
}
for (int i = 0; i < functions.size(); i++) {
String funname = functions.get(i).getName();
if (funname.equalsIgnoreCase("COUNT"))
func[i] = (double) count;
else if (funname.equalsIgnoreCase("AVG"))
func[i] /= count;
}
}
}
private static void executeGroupBy(PlainSelect select) throws SQLException {
if(select.getJoins() == null){
// TODO Auto-generated method stub
List<SelectItem> selist = select.getSelectItems();
String key;
List<String[]> temp;
List<Column> groupList = select.getGroupByColumnReferences();
Map<String, List<String[]>> groupMap = new TreeMap<String, List<String[]>>();
List<Function> functions = new ArrayList<Function>();
for (SelectItem si : selist) {
if ((Expression) ((SelectExpressionItem) si).getExpression() instanceof Function)
functions.add((Function) ((SelectExpressionItem) si).getExpression());
}
while (recordIter.hasNext()) {
rows = recordIter.next();
key = "";
for (Column l : groupList)
key = key + eval.eval(l);
if (!groupMap.containsKey(key)) {
temp = new ArrayList<String[]>();
temp.add(rows);
groupMap.put(key, temp);
} else
groupMap.get(key).add(rows);
}
for (String s : groupMap.keySet()) {
results.clear();
results.addAll(groupMap.get(s));
recordIter = results.iterator();
executeAggregate(select, functions);
StringBuilder resultRow = new StringBuilder("");
int counter = 0;
for (SelectItem si : selist) {
if ((Expression) ((SelectExpressionItem) si).getExpression() instanceof Function)
resultRow.append(func[counter++]).append("|");
else
resultRow.append((eval.eval(((SelectExpressionItem) si).getExpression())).toRawString())
.append("|");
}
resultRow.setLength(resultRow.length() - 1);
printResults.add(resultRow.toString());
func = null;
}
groupMap = null;
functions = null;
groupList = null;
selist = null;
}
}
private static void executeOrder(PlainSelect select, Iterator<String[]> recordIter2) {
// TODO Auto-generated method stub
if(select.getJoins() == null){
orderBy = select.getOrderByElements();
orderDataTypes = new ArrayList<String>();
order = new ArrayList<Integer>();
asc = new ArrayList<String>();
if (orderBy != null) {
for (int i = 0; i < orderBy.size(); i++) {
for (int j = 0; j < columns.size(); j++) {
if ((columns.get(j).getColumnName()).equals(orderBy.get(i).getExpression().toString()
.substring(orderBy.get(i).getExpression().toString().indexOf('.') + 1))) {
order.add(j);
orderDataTypes.add(colDataTypes.get(tableName).get(j));
asc.add(orderBy.get(i).isAsc() == true ? "ASC" : "DESC");
break;
}
}
}
}
if (orderBy != null) {
Collections.sort(results, sorting);
order = null;
asc = null;
orderBy = null;
}
recordIter = results.iterator();
}
}
public static void executeprint(PlainSelect plain) throws SQLException {
if(plain.getJoins() == null){
int noOfSelItems = plain.getSelectItems().size();
if (results.size() == 0 && printResults.size() == 0 && plain.getGroupByColumnReferences() == null) {
for (int i = 0; i < noOfSelItems; i++) {
if (plain.getSelectItems().get(i) instanceof AllColumns) {
for (int j = 0; j < columns.size(); j++)
System.out.print("|");
} else {
Expression e = (Expression) ((SelectExpressionItem) plain.getSelectItems().get(i)).getExpression();
if (e instanceof Function) {
if (((Function) e).getName().equalsIgnoreCase("COUNT")) {
if (i < noOfSelItems - 1)
System.out.print("0|");
else
System.out.print("0");
} else
System.out.print("|");
} else {
System.out.print("|");
}
}
}
System.out.println();
}
if (plain.getGroupByColumnReferences() == null && func == null) {
while (recordIter.hasNext() && printResults.size() < limit) {
rows = recordIter.next();
if (plain.getSelectItems().get(0) instanceof AllColumns) {
for (int i = 0; i < rows.length; i++) {
if (i == rows.length - 1)
resultRow = resultRow + rows[i];
else
resultRow = resultRow + rows[i] + "|";
}
printResults.add(resultRow);
resultRow = "";
} else {
for (int i = 0; i < noOfSelItems; i++) {
Expression e = ((SelectExpressionItem) plain.getSelectItems().get(i)).getExpression();
resultRow = resultRow + (eval.eval(e).toRawString());
if (i == noOfSelItems - 1) {
printResults.add(resultRow);
resultRow = "";
} else
resultRow = resultRow + "|";
}
}
}