/*
* Copyright (c) 2011-2015 EPFL DATA Laboratory
* Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
*
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.epfl.data.squall.api.sql.util;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import net.sf.jsqlparser.JSQLParserException;
import net.sf.jsqlparser.expression.BinaryExpression;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.Function;
import net.sf.jsqlparser.expression.Parenthesis;
import net.sf.jsqlparser.expression.operators.conditional.AndExpression;
import net.sf.jsqlparser.expression.operators.conditional.OrExpression;
import net.sf.jsqlparser.expression.operators.relational.ExpressionList;
import net.sf.jsqlparser.parser.CCJSqlParserManager;
import net.sf.jsqlparser.schema.Column;
import net.sf.jsqlparser.schema.Table;
import net.sf.jsqlparser.statement.Statement;
import net.sf.jsqlparser.statement.select.Join;
import net.sf.jsqlparser.statement.select.Select;
import org.apache.log4j.Logger;
import ch.epfl.data.squall.api.sql.optimizers.CompGen;
import ch.epfl.data.squall.api.sql.optimizers.name.CostParams;
import ch.epfl.data.squall.api.sql.optimizers.name.NameCompGen;
import ch.epfl.data.squall.api.sql.schema.ColumnNameType;
import ch.epfl.data.squall.api.sql.schema.Schema;
import ch.epfl.data.squall.api.sql.visitors.jsql.ColumnCollectVisitor;
import ch.epfl.data.squall.api.sql.visitors.jsql.PrintVisitor;
import ch.epfl.data.squall.api.sql.visitors.jsql.SQLVisitor;
import ch.epfl.data.squall.api.sql.visitors.squall.ColumnRefCollectVisitor;
import ch.epfl.data.squall.components.Component;
import ch.epfl.data.squall.components.DataSourceComponent;
import ch.epfl.data.squall.components.theta.ThetaJoinComponent;
import ch.epfl.data.squall.expressions.ColumnReference;
import ch.epfl.data.squall.expressions.ValueExpression;
import ch.epfl.data.squall.operators.ChainOperator;
import ch.epfl.data.squall.operators.Operator;
import ch.epfl.data.squall.query_plans.QueryBuilder;
import ch.epfl.data.squall.types.Type;
import ch.epfl.data.squall.utilities.MyUtilities;
import ch.epfl.data.squall.utilities.SystemParameters;
public class ParserUtil {
/*
* append each expr to the corresponding componentName. componentName is the
* key for collocatedExprs.
*/
public static void addAndExprsToComps(
Map<String, Expression> collocatedExprs, List<Expression> exprs) {
for (final Expression expr : exprs) {
// first we determine which component it belongs to
// In "R.A = S.A AND T.A = 4", "R.A = S.A" is not WHERE clause, it's
// a join condition
final List<Column> columns = getJSQLColumns(expr);
final String componentName = getComponentName(columns.get(0)
.getTable());
addAndExprToComp(collocatedExprs, expr, componentName);
}
}
/*
* append expr to the corresponding component Used outside this class,
* that's why compName is not extracted from expr
*/
public static void addAndExprToComp(
Map<String, Expression> collocatedExprs, Expression expr,
String compName) {
if (collocatedExprs.containsKey(compName)) {
final Expression oldExpr = collocatedExprs.get(compName);
final Expression newExpr = new AndExpression(oldExpr, expr);
collocatedExprs.put(compName, newExpr);
} else
collocatedExprs.put(compName, expr);
}
/*
* This has to same semantic as addAndExprToComps the only difference is
* that collocatedExprs is a different type we need to keep all the ancestor
* DataSources which correspond to appropriate orExpr
*/
public static void addOrExprsToComps(
Map<Set<String>, Expression> collocatedExprs,
List<OrExpression> orExprs) {
for (final OrExpression orExpr : orExprs)
addOrExprToComp(collocatedExprs, orExpr);
}
public static void addOrExprToComp(
Map<Set<String>, Expression> collocatedExprs, OrExpression expr) {
final List<Column> columns = getJSQLColumns(expr);
final Set<String> compNameSet = new HashSet<String>(
getCompNamesFromColumns(columns));
if (collocatedExprs.containsKey(compNameSet)) {
final Expression oldExpr = collocatedExprs.get(compNameSet);
final Expression newExpr = new AndExpression(oldExpr, expr);
collocatedExprs.put(compNameSet, newExpr);
} else
collocatedExprs.put(compNameSet, expr);
}
public static <K, V> void addToCollection(K key, V singleValue,
Map<K, List<V>> collection) {
List<V> valueList;
if (collection.containsKey(key))
valueList = collection.get(key);
else {
valueList = new ArrayList<V>();
collection.put(key, valueList);
}
valueList.add(singleValue);
}
public static void batchesToMap(NameCompGen cg, Map map) {
for (final Component comp : cg.getQueryBuilder().getPlan()) {
final String compName = comp.getName();
final int batchSize = cg.getCostParameters(compName).getBatchSize();
SystemParameters.putInMap(map, compName + "_BS", batchSize);
}
}
/*
* This is a deep copy of fromColumn to toColumn
*/
public static void copyColumn(Column toColumn, Column fromColumn) {
toColumn.setColumnName(fromColumn.getColumnName());
toColumn.setTable(fromColumn.getTable());
}
public static void copyColumn(Column toColumn, String fromColumnStr) {
final Column fromColumn = nameToColumn(fromColumnStr);
copyColumn(toColumn, fromColumn);
}
/*
* From a list of <NATIONNAME, StringConversion> it creates a list of
* <N1.NATIONNAME, StringConversion>
*/
public static TupleSchema createAliasedSchema(
List<ColumnNameType> originalSchema, String tableCompName) {
final List<ColumnNameType> cnts = new ArrayList<ColumnNameType>();
for (final ColumnNameType cnt : originalSchema) {
String columnName = cnt.getName();
columnName = getFullName(tableCompName, columnName);
final Type tc = cnt.getType();
cnts.add(new ColumnNameType(columnName, tc));
}
return new TupleSchema(cnts);
}
// template method
public static <T> List<T> createListExp(T elem) {
final List<T> result = new ArrayList<T>();
result.add(elem);
return result;
}
public static boolean equals(Table table1, Table table2) {
if (table1 == null)
return table2 == null;
else if (table2 != null)
return getComponentName(table1).equals(getComponentName(table2));
else
return false;
}
public static List<Integer> extractColumnIndexes(
List<ValueExpression> veList) {
final List<Integer> indexes = new ArrayList<Integer>();
for (final ValueExpression ve : veList)
if (ve instanceof ColumnReference) {
final ColumnReference cr = (ColumnReference) ve;
indexes.add(cr.getColumnIndex());
// }else if(ve instanceof IntegerYearFromDate){
// //SUPPORT FOR EXTRACT_YEAR
// IntegerYearFromDate iyfd = (IntegerYearFromDate) ve;
// ColumnReference<Date> veDate = (ColumnReference<Date>)
// iyfd.getInnerExpressions().get(0);
// indexes.add(veDate.getColumnIndex());
} else
throw new RuntimeException(
"Should check with isAllColumnReferences before use!");
return indexes;
}
public static String generateUniqueName(String nameBase) {
if (_uniqueNumbers.containsKey(nameBase)) {
final int available = _uniqueNumbers.remove(nameBase);
_uniqueNumbers.put(nameBase, available + 1);
return nameBase + available;
} else {
_uniqueNumbers.put(nameBase, 1);
return nameBase + "0";
}
}
public static List<ColumnReference> getColumnRefFromVEs(
List<ValueExpression> veList) {
final List<ColumnReference> crList = new ArrayList<ColumnReference>();
for (final ValueExpression ve : veList) {
final ColumnRefCollectVisitor colVisitor = new ColumnRefCollectVisitor();
ve.accept(colVisitor);
crList.addAll(colVisitor.getColumnRefs());
}
return crList;
}
public static List<Integer> getColumnRefIndexes(List<ColumnReference> crList) {
final List<Integer> intList = new ArrayList<Integer>();
for (final ColumnReference cr : crList)
intList.add(cr.getColumnIndex());
return intList;
}
public static List<String> getCompNamesFromColumns(List<Column> columns) {
final List<String> compNameList = new ArrayList<String>();
for (final Column column : columns) {
final String compName = getComponentName(column);
compNameList.add(compName);
}
return compNameList;
}
/*
* Find component in a query with a given name
*/
public static Component getComponent(String compName, CompGen cg) {
return cg.getQueryBuilder().getComponent(compName);
}
public static String getComponentName(Column column) {
return getComponentName(column.getTable());
}
/*
* We assume all the columns refer to the same DataSourceComponent
*/
public static String getComponentName(List<Column> columns) {
// all the columns will be from the same table, so we can choose any of
// them
// (here we choose the first one)
final Column column = columns.get(0);
return getComponentName(column);
}
public static String getComponentName(Table table) {
String tableName = table.getAlias();
if (tableName == null)
tableName = table.getName();
return tableName;
}
/*
* Find a list of components in a query with a given list of names
*/
public static List<Component> getComponents(List<String> compNameList,
CompGen cg) {
final List<Component> compList = new ArrayList<Component>();
for (final String compName : compNameList)
compList.add(getComponent(compName, cg));
return compList;
}
public static <T> List<T> getDifference(List<T> bigger, List<T> smaller) {
final List<T> result = new ArrayList<T>();
for (final T elem1 : bigger)
if (!smaller.contains(elem1))
result.add(elem1);
return result;
}
/*
* returns N1.NATIONNAME
*/
public static String getFullAliasedName(Column column) {
return getFullName(getComponentName(column), column.getColumnName());
}
public static String getFullName(String tableCompName, String columnName) {
return tableCompName + "." + columnName;
}
public static String getFullSchemaColumnName(Column column,
TableAliasName tan) {
final String tableCompName = getComponentName(column);
final String tableSchemaName = tan.getSchemaName(tableCompName);
final String columnName = column.getColumnName();
return getFullName(tableSchemaName, columnName);
}
public static String getFullSchemaColumnName(String fullAliasedName,
TableAliasName tan) {
final String[] parts = fullAliasedName.split("\\.");
final String tableCompName = parts[0];
final String columnName = parts[1];
return getFullName(tan.getSchemaName(tableCompName), columnName);
}
/*
* The result will have duplicates only if there are duplicates in list1
*/
public static <T> List<T> getIntersection(List<T> list1, List<T> list2) {
final List<T> result = new ArrayList<T>();
for (final T elem1 : list1)
if (list2.contains(elem1))
result.add(elem1);
return result;
}
public static List<Expression> getJoinCondition(SQLVisitor pq,
Component left, Component right) {
final List<String> leftAncestors = getSourceNameList(left);
final List<String> rightAncestors = getSourceNameList(right);
return pq.getJte().getExpressions(leftAncestors, rightAncestors);
}
public static List<Column> getJSQLColumns(Expression expr) {
final ColumnCollectVisitor columnCollect = new ColumnCollectVisitor();
expr.accept(columnCollect);
return columnCollect.getColumns();
}
public static List<Column> getJSQLColumns(List<Expression> exprs) {
final List<Column> result = new ArrayList<Column>();
for (final Expression expr : exprs)
result.addAll(getJSQLColumns(expr));
return result;
}
/*
* get the number of elements with the value in a segment [0, endIndex).
* Used to get the number of hashIndexes(elements) which are smaller than
* index(endIndex).
*/
public static int getNumElementsBefore(int endIndex, List<Integer> elements) {
int numBefore = 0;
for (int i = 0; i < endIndex; i++)
if (elements.contains(i))
numBefore++;
return numBefore;
}
public static int getPreOpsOutputSize(Component component, Schema schema,
TableAliasName tan) {
if (component instanceof ThetaJoinComponent)
throw new RuntimeException(
"SQL generator with Theta does not work for now!");
// TODO similar to Equijoin, but not subtracting joinColumnsLength
final Component[] parents = component.getParents();
if (parents == null)
// this is a DataSourceComponent
return getPreOpsOutputSize((DataSourceComponent) component, schema,
tan);
else if (parents.length == 1)
return getPreOpsOutputSize(parents[0], schema, tan);
else if (parents.length == 2) {
final Component firstParent = parents[0];
final Component secondParent = parents[1];
final int joinColumnsLength = firstParent.getHashIndexes().size();
return getPreOpsOutputSize(firstParent, schema, tan)
+ getPreOpsOutputSize(secondParent, schema, tan)
- joinColumnsLength;
}
throw new RuntimeException("More than two parents for a component "
+ component);
}
/*
* Used in Simple and Rule optimizer Used when index of a column has to be
* obtained before EarlyProjection is performed.
*/
public static int getPreOpsOutputSize(DataSourceComponent source,
Schema schema, TableAliasName tan) {
final String tableSchemaName = tan.getSchemaName(source.getName());
return schema.getTableSchema(tableSchemaName).size();
}
public static List<ColumnNameType> getProjectedSchema(
List<ColumnNameType> schema, List<Integer> hashIndexes) {
final List<ColumnNameType> result = new ArrayList<ColumnNameType>();
for (final Integer hashIndex : hashIndexes)
// the order is improtant
result.add(schema.get(hashIndex));
return result;
}
public static List<String> getSourceNameList(Component component) {
final List<DataSourceComponent> sources = component
.getAncestorDataSources();
final List<String> compNames = new ArrayList<String>();
for (final DataSourceComponent source : sources)
compNames.add(source.getName());
return compNames;
}
public static Set<String> getSourceNameSet(Component component) {
final List<DataSourceComponent> sources = component
.getAncestorDataSources();
final Set<String> compNames = new HashSet<String>();
for (final DataSourceComponent source : sources)
compNames.add(source.getName());
return compNames;
}
// We couldn't change toString methods without invasion to JSQL classes
public static String getStringExpr(Expression expr) {
final PrintVisitor printer = new PrintVisitor();
expr.accept(printer);
return printer.getString();
}
public static String getStringExpr(ExpressionList params) {
final PrintVisitor printer = new PrintVisitor();
params.accept(printer);
return printer.getString();
}
// we use this method for List<OrExpression> as well
public static <T extends Expression> String getStringExpr(List<T> listExpr) {
final StringBuilder sb = new StringBuilder();
final int size = listExpr.size();
for (int i = 0; i < size; i++) {
sb.append(getStringExpr(listExpr.get(i)));
if (i != size - 1)
// not the last element
sb.append(", ");
}
return sb.toString();
}
public static List<Expression> getSubExpressions(Expression expr) {
final List<Expression> result = new ArrayList<Expression>();
if (expr instanceof BinaryExpression) {
final BinaryExpression be = (BinaryExpression) expr;
result.add(be.getLeftExpression());
result.add(be.getRightExpression());
} else if (expr instanceof Parenthesis) {
final Parenthesis prnths = (Parenthesis) expr;
result.add(prnths.getExpression());
} else if (expr instanceof Function) {
final Function fun = (Function) expr;
final ExpressionList params = fun.getParameters();
if (params != null)
result.addAll(params.getExpressions());
} else
return null;
return result;
}
// can be used *before* parallelismToMap method is invoked
public static int getTotalParallelism(NameCompGen ncg) {
int totalParallelism = 0;
final Map<String, CostParams> compCost = ncg.getCompCost();
for (final Map.Entry<String, CostParams> compNameCost : compCost
.entrySet())
totalParallelism += compNameCost.getValue().getParallelism();
return totalParallelism;
}
// can be used *after* parallelismToMap method is invoked
public static int getTotalParallelism(QueryBuilder plan,
Map<String, String> map) {
int totalParallelism = 0;
for (final String compName : plan.getComponentNames()) {
final String parallelismStr = SystemParameters.getString(map,
compName + "_PAR");
totalParallelism += Integer.valueOf(parallelismStr);
}
return totalParallelism;
}
public static boolean isAllColumnRefs(List<ValueExpression> veList) {
for (final ValueExpression ve : veList)
if (!(ve instanceof ColumnReference))
return false;
return true;
}
/*
* is joinComponent the last component in the query plan, in terms of no
* more joins to perform
*/
public static boolean isFinalComponent(Component comp, SQLVisitor pq) {
final Set<String> allSources = new HashSet<String>(pq.getTan()
.getComponentNames());
final Set<String> actuallPlanSources = getSourceNameSet(comp);
return allSources.equals(actuallPlanSources);
}
public static boolean isSameSchema(TupleSchema listSchema1,
TupleSchema listSchema2) {
final Set<ColumnNameType> setSchema1 = new HashSet<ColumnNameType>(
listSchema1.getSchema());
final Set<ColumnNameType> setSchema2 = new HashSet<ColumnNameType>(
listSchema2.getSchema());
return setSchema1.equals(setSchema2);
}
// throw away join hash indexes from the right parent
public static TupleSchema joinSchema(Component[] parents,
Map<String, CostParams> compCost) {
final Component leftParent = parents[0];
final Component rightParent = parents[1];
final TupleSchema leftSchema = compCost.get(leftParent.getName())
.getSchema();
final TupleSchema rightSchema = compCost.get(rightParent.getName())
.getSchema();
final List<ColumnNameType> leftCnts = leftSchema.getSchema();
final List<ColumnNameType> rightCnts = rightSchema.getSchema();
// when HashExpressions are used the schema is a simple appending
final List<Integer> leftHashIndexes = leftParent.getHashIndexes();
final List<Integer> rightHashIndexes = rightParent.getHashIndexes();
// ******************** similar to MyUtilities.createOutputTuple
final List<ColumnNameType> outputSchema = new ArrayList<ColumnNameType>();
for (int i = 0; i < leftCnts.size(); i++)
// first relation (R)
outputSchema.add(leftCnts.get(i));
for (int i = 0; i < rightCnts.size(); i++)
if ((rightHashIndexes == null) || (!rightHashIndexes.contains(i)))
// does
// not
// exits
// add
// the
// column!!
// (S)
outputSchema.add(rightCnts.get(i));
final TupleSchema result = new TupleSchema(outputSchema);
// ******************** end of similar
// creating a list of synonyms - TODO: works only for left-deep plans
final Map<String, String> synonims = new HashMap<String, String>();
final Map<String, String> leftSynonims = leftSchema.getSynonims();
if (leftSynonims != null)
synonims.putAll(leftSynonims); // have to add all the synonyms from
// left parent
for (int i = 0; i < rightHashIndexes.size(); i++) {
final int leftHash = leftHashIndexes.get(i);
final int rightHash = rightHashIndexes.get(i);
final String rightColStr = rightCnts.get(rightHash).getName();
final String originalColumnStr = leftCnts.get(leftHash).getName();
synonims.put(rightColStr, originalColumnStr);
}
if (!synonims.isEmpty())
result.setSynonims(synonims);
return result;
}
public static int[] listToArr(List<Integer> list) {
final int[] arr = new int[list.size()];
for (int i = 0; i < list.size(); i++)
arr[i] = list.get(i);
return arr;
}
public static <T> String listToStr(List<T> list) {
final StringBuilder sb = new StringBuilder();
sb.append("(");
for (int i = 0; i < list.size(); i++) {
sb.append(list.get(i));
if (i == list.size() - 1)
sb.append(")");
else
sb.append(", ");
}
return sb.toString();
}
public static Column nameToColumn(String name) {
final String[] nameParts = name.split("\\.");
final String compName = nameParts[0];
final String columnName = nameParts[1];
final Table table = new Table();
table.setAlias(compName);
final Column column = new Column();
column.setColumnName(columnName);
column.setTable(table);
return column;
}
private static List<Operator> orderOperators(ChainOperator chain) {
final List<Operator> result = new ArrayList<Operator>();
final Operator selection = chain.getSelection();
if (selection != null)
result.add(selection);
final Operator distinct = chain.getDistinct();
if (distinct != null)
result.add(distinct);
final Operator projection = chain.getProjection();
if (projection != null)
result.add(projection);
final Operator agg = chain.getAggregation();
if (agg != null)
result.add(agg);
return result;
}
/*
* On each component order the Operators as Select, Distinct, Project,
* Aggregation
*/
public static void orderOperators(QueryBuilder queryPlan) {
final List<Component> comps = queryPlan.getPlan();
for (final Component comp : comps) {
final ChainOperator chain = comp.getChainOperator();
chain.setOperators(orderOperators(chain));
}
}
public static int parallelismToMap(Map<String, Integer> compNamePars,
Map map) {
int totalParallelism = 0;
for (final Map.Entry<String, Integer> compNamePar : compNamePars
.entrySet()) {
final String compName = compNamePar.getKey();
final int parallelism = compNamePar.getValue();
if (parallelism == 0)
throw new RuntimeException("Unset parallelism for component "
+ compName + " !");
else if (parallelism < 0)
throw new RuntimeException(
"Negative parallelism for component " + compName + " !");
totalParallelism += parallelism;
SystemParameters.putInMap(map, compName + "_PAR", parallelism);
}
return totalParallelism;
}
public static int parallelismToMap(NameCompGen cg, Map map) {
final Map<String, Integer> compNamePars = new HashMap<String, Integer>();
for (final Component comp : cg.getQueryBuilder().getPlan()) {
final String compName = comp.getName();
final int parallelism = cg.getCostParameters(compName)
.getParallelism();
compNamePars.put(compName, parallelism);
}
return parallelismToMap(compNamePars, map);
}
public static SQLVisitor parseQuery(Map map) {
final String sqlString = readSQL(map);
final String queryName = SystemParameters.getString(map,
"DIP_QUERY_NAME");
return parseQuery(sqlString, queryName);
}
public static SQLVisitor parseQuery(String sqlString) {
return parseQuery(sqlString, "");
}
private static SQLVisitor parseQuery(String sqlString, String queryName) {
final CCJSqlParserManager pm = new CCJSqlParserManager();
Statement statement = null;
try {
statement = pm.parse(new StringReader(sqlString));
} catch (final JSQLParserException ex) {
LOG.info("JSQLParserException");
}
if (statement instanceof Select) {
final Select selectStatement = (Select) statement;
final SQLVisitor parsedQuery = new SQLVisitor(queryName);
// visit whole SELECT statement
parsedQuery.visit(selectStatement);
parsedQuery.doneVisiting();
return parsedQuery;
}
throw new RuntimeException("Please provide SELECT statement!");
}
// used after parallelismToMap method is invoked
public static String parToString(QueryBuilder plan, Map<String, String> map) {
int totalParallelism = 0;
final StringBuilder sb = new StringBuilder("\n\nPARALLELISM:\n");
for (final String compName : plan.getComponentNames()) {
final String parallelismStr = SystemParameters.getString(map,
compName + "_PAR");
sb.append(compName).append(" = ").append(parallelismStr)
.append("\n");
final int parallelism = Integer.valueOf(parallelismStr);
totalParallelism += parallelism;
}
sb.append("END OF PARALLELISM\n");
sb.append("Total parallelism is ").append(totalParallelism)
.append("\n\n");
return sb.toString();
}
/*
* JSQL printing
*/
public static void printParsedQuery(SQLVisitor pq) {
for (final Table table : pq.getTableList()) {
final String tableStr = toString(table);
LOG.info(tableStr);
}
}
private static String readSQL(Map map) {
final String queryName = SystemParameters.getString(map,
"DIP_QUERY_NAME");
final String sqlPath = SystemParameters.getString(map, "DIP_SQL_ROOT")
+ queryName + SQL_EXTENSION;
return MyUtilities.readFileSkipEmptyAndComments(sqlPath);
}
public static String toString(Join join) {
final StringBuilder joinSB = new StringBuilder();
joinSB.append("Join: my right table is ").append(join.getRightItem())
.append(".");
String type = "";
if (join.isFull())
type += "Full ";
if (join.isInner())
type += " Inner";
if (join.isLeft())
type += " Left";
if (join.isNatural())
type += " Natural";
if (join.isOuter())
type += " Outer";
if (join.isRight())
type += " Right";
if (join.isSimple())
type += " Simple";
joinSB.append("\nThe join type(s): ").append(type).append(".");
joinSB.append("\nThe join condition(s): ")
.append(join.getOnExpression()).append(".\n");
final String joinStr = joinSB.toString();
return joinStr;
}
/*
* Squall query plan printing - Indexes
*/
public static String toString(QueryBuilder queryPlan) {
final StringBuilder sb = new StringBuilder("QUERY PLAN");
for (final Component comp : queryPlan.getPlan()) {
sb.append("\n\nComponent ").append(comp.getName());
final ChainOperator chain = comp.getChainOperator();
if (!chain.isEmpty())
sb.append("\n").append(chain);
if (comp.getHashIndexes() != null
&& !comp.getHashIndexes().isEmpty())
sb.append("\n HashIndexes: ").append(
listToStr(comp.getHashIndexes()));
if (comp.getHashExpressions() != null
&& !comp.getHashExpressions().isEmpty())
sb.append("\n HashExpressions: ").append(
listToStr(comp.getHashExpressions()));
}
sb.append("\n\nEND of QUERY PLAN");
return sb.toString();
}
public static String toString(Table table) {
return table.getWholeTableName();
}
private static Logger LOG = Logger.getLogger(ParserUtil.class);
public static final int NOT_FOUND = -1;
private final static String SQL_EXTENSION = ".sql";
private static HashMap<String, Integer> _uniqueNumbers = new HashMap<String, Integer>();
}