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CnosDBNoRECOracle.java
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package sqlancer.cnosdb.oracle;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
import sqlancer.cnosdb.CnosDBCompoundDataType;
import sqlancer.cnosdb.CnosDBExpectedError;
import sqlancer.cnosdb.CnosDBGlobalState;
import sqlancer.cnosdb.CnosDBSchema;
import sqlancer.cnosdb.CnosDBSchema.CnosDBColumn;
import sqlancer.cnosdb.CnosDBSchema.CnosDBDataType;
import sqlancer.cnosdb.CnosDBSchema.CnosDBTable;
import sqlancer.cnosdb.CnosDBSchema.CnosDBTables;
import sqlancer.cnosdb.CnosDBVisitor;
import sqlancer.cnosdb.ast.CnosDBCastOperation;
import sqlancer.cnosdb.ast.CnosDBColumnValue;
import sqlancer.cnosdb.ast.CnosDBExpression;
import sqlancer.cnosdb.ast.CnosDBJoin;
import sqlancer.cnosdb.ast.CnosDBJoin.CnosDBJoinType;
import sqlancer.cnosdb.ast.CnosDBPostfixText;
import sqlancer.cnosdb.ast.CnosDBSelect;
import sqlancer.cnosdb.ast.CnosDBSelect.CnosDBFromTable;
import sqlancer.cnosdb.ast.CnosDBSelect.CnosDBSubquery;
import sqlancer.cnosdb.ast.CnosDBSelect.SelectType;
import sqlancer.cnosdb.client.CnosDBResultSet;
import sqlancer.cnosdb.gen.CnosDBExpressionGenerator;
import sqlancer.cnosdb.oracle.tlp.CnosDBTLPBase;
import sqlancer.cnosdb.query.CnosDBSelectQuery;
import sqlancer.common.oracle.TestOracle;
public class CnosDBNoRECOracle extends CnosDBNoRECBase implements TestOracle<CnosDBGlobalState> {
private final CnosDBSchema s;
public CnosDBNoRECOracle(CnosDBGlobalState globalState) {
super(globalState);
this.s = globalState.getSchema();
}
public static List<CnosDBJoin> getJoinStatements(CnosDBGlobalState globalState, List<CnosDBColumn> columns,
List<CnosDBTable> tables) {
List<CnosDBJoin> joinStatements = new ArrayList<>();
CnosDBExpressionGenerator gen = new CnosDBExpressionGenerator(globalState).setColumns(columns);
for (int i = 1; i < tables.size(); i++) {
CnosDBExpression joinClause = gen.generateExpression(CnosDBDataType.BOOLEAN);
CnosDBTable table = Randomly.fromList(tables);
tables.remove(table);
CnosDBJoinType options = CnosDBJoinType.getRandom();
CnosDBJoin j = new CnosDBJoin(new CnosDBFromTable(table), joinClause, options);
joinStatements.add(j);
}
// JOIN subqueries
for (int i = 0; i < Randomly.smallNumber(); i++) {
CnosDBTables subqueryTables = globalState.getSchema().getRandomTableNonEmptyTables();
CnosDBSubquery subquery = CnosDBTLPBase.createSubquery(globalState, String.format("sub%d", i),
subqueryTables);
CnosDBExpression joinClause = gen.generateExpression(CnosDBDataType.BOOLEAN);
CnosDBJoinType options = CnosDBJoinType.getRandom();
CnosDBJoin j = new CnosDBJoin(subquery, joinClause, options);
joinStatements.add(j);
}
return joinStatements;
}
@Override
public void check() throws Exception {
CnosDBTables randomTables = s.getRandomTableNonEmptyTables();
List<CnosDBColumn> columns = randomTables.getColumns();
CnosDBExpression randomWhereCondition = getRandomWhereCondition(columns);
List<CnosDBTable> tables = randomTables.getTables();
List<CnosDBJoin> joinStatements = getJoinStatements(state, columns, tables);
List<CnosDBExpression> fromTables = tables.stream().map(CnosDBFromTable::new).collect(Collectors.toList());
int secondCount = getUnoptimizedQueryCount(fromTables, randomWhereCondition, joinStatements);
int firstCount = getOptimizedQueryCount(fromTables, List.of(CnosDBColumn.createDummy("f0")),
randomWhereCondition, joinStatements);
if (firstCount == -1 || secondCount == -1) {
throw new IgnoreMeException();
}
if (firstCount != secondCount) {
String queryFormatString = "-- %s;\n-- count: %d";
String firstQueryStringWithCount = String.format(queryFormatString, optimizedQueryString, firstCount);
String secondQueryStringWithCount = String.format(queryFormatString, unoptimizedQueryString, secondCount);
state.getState().getLocalState()
.log(String.format("%s\n%s", firstQueryStringWithCount, secondQueryStringWithCount));
String assertionMessage = String.format("the counts mismatch (%d and %d)!\n%s\n%s", firstCount, secondCount,
firstQueryStringWithCount, secondQueryStringWithCount);
throw new AssertionError(assertionMessage);
}
}
private CnosDBExpression getRandomWhereCondition(List<CnosDBColumn> columns) {
return new CnosDBExpressionGenerator(state).setColumns(columns).generateExpression(CnosDBDataType.BOOLEAN);
}
private int getUnoptimizedQueryCount(List<CnosDBExpression> fromTables, CnosDBExpression randomWhereCondition,
List<CnosDBJoin> joinStatements) throws Exception {
CnosDBSelect select = new CnosDBSelect();
CnosDBCastOperation isTrue = new CnosDBCastOperation(randomWhereCondition,
CnosDBCompoundDataType.create(CnosDBDataType.INT));
CnosDBPostfixText asText = new CnosDBPostfixText(isTrue, " as count", CnosDBDataType.INT);
select.setFetchColumns(List.of(asText));
select.setFromList(fromTables);
select.setSelectType(SelectType.ALL);
select.setJoinClauses(joinStatements);
int secondCount = 0;
unoptimizedQueryString = "SELECT SUM(count) FROM (" + CnosDBVisitor.asString(select) + ") as res";
if (options.logEachSelect()) {
logger.writeCurrent(unoptimizedQueryString);
}
CnosDBSelectQuery q = new CnosDBSelectQuery(unoptimizedQueryString, CnosDBExpectedError.expectedErrors());
CnosDBResultSet rs;
try {
q.executeAndGet(state);
rs = q.getResultSet();
} catch (Exception e) {
if (q.getExpectedErrors().errorIsExpected(e.getMessage())) {
throw new IgnoreMeException();
}
throw new AssertionError(unoptimizedQueryString, e);
}
if (rs == null) {
return -1;
}
if (rs.next()) {
secondCount += rs.getLong(1);
}
rs.close();
return secondCount;
}
private int getOptimizedQueryCount(List<CnosDBExpression> randomTables, List<CnosDBColumn> columns,
CnosDBExpression randomWhereCondition, List<CnosDBJoin> joinStatements) {
CnosDBSelect select = new CnosDBSelect();
CnosDBColumnValue allColumns = new CnosDBColumnValue(Randomly.fromList(columns));
select.setFetchColumns(List.of(allColumns));
select.setFromList(randomTables);
select.setWhereClause(randomWhereCondition);
if (Randomly.getBooleanWithSmallProbability()) {
select.setOrderByClauses(new CnosDBExpressionGenerator(state).setColumns(columns).generateOrderBy());
}
select.setSelectType(SelectType.ALL);
select.setJoinClauses(joinStatements);
int firstCount = 0;
optimizedQueryString = CnosDBVisitor.asString(select);
if (options.logEachSelect()) {
logger.writeCurrent(optimizedQueryString);
}
CnosDBSelectQuery query = new CnosDBSelectQuery(optimizedQueryString, CnosDBExpectedError.expectedErrors());
CnosDBResultSet rs;
try {
query.executeAndGet(state);
rs = query.getResultSet();
while (rs.next()) {
firstCount++;
}
} catch (Exception e) {
if (query.getExpectedErrors().errorIsExpected(e.getMessage())) {
throw new IgnoreMeException();
}
throw new IgnoreMeException();
}
return firstCount;
}
}