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SQLite3Expression.java
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1553 lines (1290 loc) · 53.7 KB
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package sqlancer.sqlite3.ast;
import java.util.List;
import java.util.Optional;
import sqlancer.IgnoreMeException;
import sqlancer.LikeImplementationHelper;
import sqlancer.Randomly;
import sqlancer.common.visitor.BinaryOperation;
import sqlancer.common.visitor.UnaryOperation;
import sqlancer.sqlite3.SQLite3CollateHelper;
import sqlancer.sqlite3.SQLite3Provider;
import sqlancer.sqlite3.ast.SQLite3Expression.BinaryComparisonOperation.BinaryComparisonOperator;
import sqlancer.sqlite3.ast.SQLite3Expression.Sqlite3BinaryOperation.BinaryOperator;
import sqlancer.sqlite3.ast.SQLite3UnaryOperation.UnaryOperator;
import sqlancer.sqlite3.schema.SQLite3DataType;
import sqlancer.sqlite3.schema.SQLite3Schema.SQLite3Column;
import sqlancer.sqlite3.schema.SQLite3Schema.SQLite3Column.SQLite3CollateSequence;
import sqlancer.sqlite3.schema.SQLite3Schema.SQLite3Table;
public abstract class SQLite3Expression {
public static class SQLite3TableReference extends SQLite3Expression {
private final String indexedBy;
private final SQLite3Table table;
public SQLite3TableReference(String indexedBy, SQLite3Table table) {
this.indexedBy = indexedBy;
this.table = table;
}
public SQLite3TableReference(SQLite3Table table) {
this.indexedBy = null;
this.table = table;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return null;
}
public SQLite3Table getTable() {
return table;
}
public String getIndexedBy() {
return indexedBy;
}
}
public static class SQLite3Distinct extends SQLite3Expression {
private final SQLite3Expression expr;
public SQLite3Distinct(SQLite3Expression expr) {
this.expr = expr;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return expr.getExplicitCollateSequence();
}
@Override
public SQLite3Constant getExpectedValue() {
return expr.getExpectedValue();
}
public SQLite3Expression getExpression() {
return expr;
}
@Override
public SQLite3CollateSequence getImplicitCollateSequence() {
// https://www.sqlite.org/src/tktview/18ab5da2c05ad57d7f9d79c41d3138b141378543
return expr.getImplicitCollateSequence();
}
}
public SQLite3Constant getExpectedValue() {
return null;
}
public enum TypeAffinity {
INTEGER, TEXT, BLOB, REAL, NUMERIC, NONE;
public boolean isNumeric() {
return this == INTEGER || this == REAL || this == NUMERIC;
}
}
/*
* See https://www.sqlite.org/datatype3.html 3.2
*/
public TypeAffinity getAffinity() {
return TypeAffinity.NONE;
}
/*
* See https://www.sqlite.org/datatype3.html#assigning_collating_sequences_from_sql 7.1
*
*/
public abstract SQLite3CollateSequence getExplicitCollateSequence();
public SQLite3CollateSequence getImplicitCollateSequence() {
return null;
}
public static class SQLite3Exist extends SQLite3Expression {
private final SQLite3Expression select;
public SQLite3Exist(SQLite3Expression select) {
this.select = select;
}
public SQLite3Expression getExpression() {
return select;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return null;
}
}
public static class Join extends SQLite3Expression {
public enum JoinType {
INNER, CROSS, OUTER, NATURAL;
}
private final SQLite3Table table;
private SQLite3Expression onClause;
private JoinType type;
public Join(Join other) {
this.table = other.table;
this.onClause = other.onClause;
this.type = other.type;
}
public Join(SQLite3Table table, SQLite3Expression onClause, JoinType type) {
this.table = table;
this.onClause = onClause;
this.type = type;
}
public Join(SQLite3Table table, JoinType type) {
this.table = table;
if (type != JoinType.NATURAL) {
throw new AssertionError();
}
this.onClause = null;
this.type = type;
}
public SQLite3Table getTable() {
return table;
}
public SQLite3Expression getOnClause() {
return onClause;
}
public JoinType getType() {
return type;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return null;
}
public void setOnClause(SQLite3Expression onClause) {
this.onClause = onClause;
}
public void setType(JoinType type) {
this.type = type;
}
}
public static class Subquery extends SQLite3Expression {
private final String query;
public Subquery(String query) {
this.query = query;
}
public static SQLite3Expression create(String query) {
return new Subquery(query);
}
public String getQuery() {
return query;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return null;
}
}
public static class TypeLiteral {
private final Type type;
public enum Type {
TEXT {
@Override
public SQLite3Constant apply(SQLite3Constant cons) {
return SQLite3Cast.castToText(cons);
}
},
REAL {
@Override
public SQLite3Constant apply(SQLite3Constant cons) {
return SQLite3Cast.castToReal(cons);
}
},
INTEGER {
@Override
public SQLite3Constant apply(SQLite3Constant cons) {
return SQLite3Cast.castToInt(cons);
}
},
NUMERIC {
@Override
public SQLite3Constant apply(SQLite3Constant cons) {
return SQLite3Cast.castToNumeric(cons);
}
},
BLOB {
@Override
public SQLite3Constant apply(SQLite3Constant cons) {
return SQLite3Cast.castToBlob(cons);
}
};
public abstract SQLite3Constant apply(SQLite3Constant cons);
}
public TypeLiteral(Type type) {
this.type = type;
}
public Type getType() {
return type;
}
}
public static class Cast extends SQLite3Expression {
private final TypeLiteral type;
private final SQLite3Expression expression;
public Cast(TypeLiteral typeofExpr, SQLite3Expression expression) {
this.type = typeofExpr;
this.expression = expression;
}
public SQLite3Expression getExpression() {
return expression;
}
public TypeLiteral getType() {
return type;
}
@Override
public SQLite3Constant getExpectedValue() {
if (expression.getExpectedValue() == null) {
return null;
} else {
return type.type.apply(expression.getExpectedValue());
}
}
/**
* An expression of the form "CAST(expr AS type)" has an affinity that is the same as a column with a declared
* type of "type".
*/
@Override
public TypeAffinity getAffinity() {
switch (type.type) {
case BLOB:
return TypeAffinity.BLOB;
case INTEGER:
return TypeAffinity.INTEGER;
case NUMERIC:
return TypeAffinity.NUMERIC;
case REAL:
return TypeAffinity.REAL;
case TEXT:
return TypeAffinity.TEXT;
default:
throw new AssertionError();
}
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return expression.getExplicitCollateSequence();
}
@Override
public SQLite3CollateSequence getImplicitCollateSequence() {
if (SQLite3CollateHelper.shouldGetSubexpressionAffinity(expression)) {
return expression.getImplicitCollateSequence();
} else {
return null;
}
}
}
public static class BetweenOperation extends SQLite3Expression {
private final SQLite3Expression expr;
private final boolean negated;
private final SQLite3Expression left;
private final SQLite3Expression right;
public BetweenOperation(SQLite3Expression expr, boolean negated, SQLite3Expression left,
SQLite3Expression right) {
this.expr = expr;
this.negated = negated;
this.left = left;
this.right = right;
}
public SQLite3Expression getExpression() {
return expr;
}
public boolean isNegated() {
return negated;
}
public SQLite3Expression getLeft() {
return left;
}
public SQLite3Expression getRight() {
return right;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
if (expr.getExplicitCollateSequence() != null) {
return expr.getExplicitCollateSequence();
} else if (left.getExplicitCollateSequence() != null) {
return left.getExplicitCollateSequence();
} else {
return right.getExplicitCollateSequence();
}
}
@Override
public SQLite3Constant getExpectedValue() {
return getTopNode().getExpectedValue();
}
public SQLite3Expression getTopNode() {
BinaryComparisonOperation leftOp = new BinaryComparisonOperation(expr, left,
BinaryComparisonOperator.GREATER_EQUALS);
BinaryComparisonOperation rightOp = new BinaryComparisonOperation(expr, right,
BinaryComparisonOperator.SMALLER_EQUALS);
Sqlite3BinaryOperation and = new Sqlite3BinaryOperation(leftOp, rightOp, BinaryOperator.AND);
if (negated) {
return new SQLite3UnaryOperation(UnaryOperator.NOT, and);
} else {
return and;
}
}
}
public static class Function extends SQLite3Expression {
private final SQLite3Expression[] arguments;
private final String name;
public Function(String name, SQLite3Expression... arguments) {
this.name = name;
this.arguments = arguments.clone();
}
public SQLite3Expression[] getArguments() {
return arguments.clone();
}
public String getName() {
return name;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
for (SQLite3Expression arg : arguments) {
if (arg.getExplicitCollateSequence() != null) {
return arg.getExplicitCollateSequence();
}
}
return null;
}
}
public static class SQLite3OrderingTerm extends SQLite3Expression {
private final SQLite3Expression expression;
private final Ordering ordering;
public enum Ordering {
ASC, DESC;
public static Ordering getRandomValue() {
return Randomly.fromOptions(Ordering.values());
}
}
public SQLite3OrderingTerm(SQLite3Expression expression, Ordering ordering) {
this.expression = expression;
this.ordering = ordering;
}
public SQLite3Expression getExpression() {
return expression;
}
public Ordering getOrdering() {
return ordering;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return expression.getExplicitCollateSequence();
}
}
public static class CollateOperation extends SQLite3Expression {
private final SQLite3Expression expression;
private final SQLite3CollateSequence collate;
public CollateOperation(SQLite3Expression expression, SQLite3CollateSequence collate) {
this.expression = expression;
this.collate = collate;
}
public SQLite3CollateSequence getCollate() {
return collate;
}
public SQLite3Expression getExpression() {
return expression;
}
// If either operand has an explicit collating function assignment using the
// postfix COLLATE operator, then the explicit collating function is used for
// comparison, with precedence to the collating function of the left operand.
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return collate;
}
@Override
public SQLite3Constant getExpectedValue() {
return expression.getExpectedValue();
}
@Override
public TypeAffinity getAffinity() {
return expression.getAffinity();
}
}
public static class SQLite3PostfixUnaryOperation extends SQLite3Expression
implements UnaryOperation<SQLite3Expression> {
public enum PostfixUnaryOperator {
ISNULL("ISNULL") {
@Override
public SQLite3Constant apply(SQLite3Constant expectedValue) {
if (expectedValue.isNull()) {
return SQLite3Constant.createTrue();
} else {
return SQLite3Constant.createFalse();
}
}
},
NOT_NULL("NOT NULL") {
@Override
public SQLite3Constant apply(SQLite3Constant expectedValue) {
if (expectedValue.isNull()) {
return SQLite3Constant.createFalse();
} else {
return SQLite3Constant.createTrue();
}
}
},
NOTNULL("NOTNULL") {
@Override
public SQLite3Constant apply(SQLite3Constant expectedValue) {
if (expectedValue.isNull()) {
return SQLite3Constant.createFalse();
} else {
return SQLite3Constant.createTrue();
}
}
},
IS_TRUE("IS TRUE") {
@Override
public SQLite3Constant apply(SQLite3Constant expectedValue) {
if (expectedValue.isNull()) {
return SQLite3Constant.createIntConstant(0);
}
return SQLite3Cast.asBoolean(expectedValue);
}
},
IS_FALSE("IS FALSE") {
@Override
public SQLite3Constant apply(SQLite3Constant expectedValue) {
if (expectedValue.isNull()) {
return SQLite3Constant.createIntConstant(0);
}
return SQLite3UnaryOperation.UnaryOperator.NOT.apply(SQLite3Cast.asBoolean(expectedValue));
}
};
private final String textRepresentation;
PostfixUnaryOperator(String textRepresentation) {
this.textRepresentation = textRepresentation;
}
@Override
public String toString() {
return getTextRepresentation();
}
public String getTextRepresentation() {
return textRepresentation;
}
public static PostfixUnaryOperator getRandomOperator() {
return Randomly.fromOptions(values());
}
public abstract SQLite3Constant apply(SQLite3Constant expectedValue);
}
private final PostfixUnaryOperator operation;
private final SQLite3Expression expression;
public SQLite3PostfixUnaryOperation(PostfixUnaryOperator operation, SQLite3Expression expression) {
this.operation = operation;
this.expression = expression;
}
public PostfixUnaryOperator getOperation() {
return operation;
}
@Override
public SQLite3Expression getExpression() {
return expression;
}
@Override
public SQLite3Constant getExpectedValue() {
if (expression.getExpectedValue() == null) {
return null;
}
return operation.apply(expression.getExpectedValue());
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return expression.getExplicitCollateSequence();
}
@Override
public String getOperatorRepresentation() {
return operation.getTextRepresentation();
}
@Override
public OperatorKind getOperatorKind() {
return OperatorKind.POSTFIX;
}
}
public static class InOperation extends SQLite3Expression {
private final SQLite3Expression left;
private List<SQLite3Expression> rightExpressionList;
private SQLite3Expression rightSelect;
public InOperation(SQLite3Expression left, List<SQLite3Expression> right) {
this.left = left;
this.rightExpressionList = right;
}
public InOperation(SQLite3Expression left, SQLite3Expression select) {
this.left = left;
this.rightSelect = select;
}
public SQLite3Expression getLeft() {
return left;
}
public List<SQLite3Expression> getRightExpressionList() {
return rightExpressionList;
}
public SQLite3Expression getRightSelect() {
return rightSelect;
}
@Override
// The collating sequence used for expressions of the form "x IN (y, z, ...)" is
// the collating sequence of x.
public SQLite3CollateSequence getExplicitCollateSequence() {
if (left.getExplicitCollateSequence() != null) {
return left.getExplicitCollateSequence();
} else {
return null;
}
}
@Override
public SQLite3Constant getExpectedValue() {
// TODO query as right hand side is not implemented
if (left.getExpectedValue() == null) {
return null;
}
if (rightExpressionList.isEmpty()) {
return SQLite3Constant.createFalse();
} else if (left.getExpectedValue().isNull()) {
return SQLite3Constant.createNullConstant();
} else {
boolean containsNull = false;
for (SQLite3Expression expr : getRightExpressionList()) {
if (expr.getExpectedValue() == null) {
return null; // TODO: we can still compute something if the value is already contained
}
SQLite3CollateSequence collate = getExplicitCollateSequence();
if (collate == null) {
collate = left.getImplicitCollateSequence();
}
if (collate == null) {
collate = SQLite3CollateSequence.BINARY;
}
ConstantTuple convertedConstants = applyAffinities(left.getAffinity(), TypeAffinity.NONE,
left.getExpectedValue(), expr.getExpectedValue());
SQLite3Constant equals = left.getExpectedValue().applyEquals(convertedConstants.right, collate);
Optional<Boolean> isEquals = SQLite3Cast.isTrue(equals);
if (isEquals.isPresent() && isEquals.get()) {
return SQLite3Constant.createTrue();
} else if (!isEquals.isPresent()) {
containsNull = true;
}
}
if (containsNull) {
return SQLite3Constant.createNullConstant();
} else {
return SQLite3Constant.createFalse();
}
}
}
}
public static class MatchOperation extends SQLite3Expression {
private final SQLite3Expression left;
private final SQLite3Expression right;
public MatchOperation(SQLite3Expression left, SQLite3Expression right) {
this.left = left;
this.right = right;
}
@Override
public SQLite3CollateSequence getExplicitCollateSequence() {
return null;
}
public SQLite3Expression getLeft() {
return left;
}
public SQLite3Expression getRight() {
return right;
}
}
public static class BinaryComparisonOperation extends SQLite3Expression
implements BinaryOperation<SQLite3Expression> {
private final BinaryComparisonOperator operation;
private final SQLite3Expression left;
private final SQLite3Expression right;
public BinaryComparisonOperation(SQLite3Expression left, SQLite3Expression right,
BinaryComparisonOperator operation) {
this.left = left;
this.right = right;
this.operation = operation;
}
public BinaryComparisonOperator getOperator() {
return operation;
}
@Override
public SQLite3Expression getLeft() {
return left;
}
@Override
public SQLite3Expression getRight() {
return right;
}
@Override
public SQLite3Constant getExpectedValue() {
SQLite3Constant leftExpected = left.getExpectedValue();
SQLite3Constant rightExpected = right.getExpectedValue();
if (leftExpected == null || rightExpected == null) {
return null;
}
TypeAffinity leftAffinity = left.getAffinity();
TypeAffinity rightAffinity = right.getAffinity();
return operation.applyOperand(leftExpected, leftAffinity, rightExpected, rightAffinity, left, right,
operation.shouldApplyAffinity());
}
public static BinaryComparisonOperation create(SQLite3Expression leftVal, SQLite3Expression rightVal,
BinaryComparisonOperator op) {
return new BinaryComparisonOperation(leftVal, rightVal, op);
}
public enum BinaryComparisonOperator {
SMALLER("<") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
return left.applyLess(right, collate);
}
},
SMALLER_EQUALS("<=") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
SQLite3Constant lessThan = left.applyLess(right, collate);
if (lessThan == null) {
return null;
}
if (lessThan.getDataType() == SQLite3DataType.INT && lessThan.asInt() == 0) {
return left.applyEquals(right, collate);
} else {
return lessThan;
}
}
},
GREATER(">") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
SQLite3Constant equals = left.applyEquals(right, collate);
if (equals == null) {
return null;
}
if (equals.getDataType() == SQLite3DataType.INT && equals.asInt() == 1) {
return SQLite3Constant.createFalse();
} else {
SQLite3Constant applyLess = left.applyLess(right, collate);
if (applyLess == null) {
return null;
}
return UnaryOperator.NOT.apply(applyLess);
}
}
},
GREATER_EQUALS(">=") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
SQLite3Constant equals = left.applyEquals(right, collate);
if (equals == null) {
return null;
}
if (equals.getDataType() == SQLite3DataType.INT && equals.asInt() == 1) {
return SQLite3Constant.createTrue();
} else {
SQLite3Constant applyLess = left.applyLess(right, collate);
if (applyLess == null) {
return null;
}
return UnaryOperator.NOT.apply(applyLess);
}
}
},
EQUALS("=", "==") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
return left.applyEquals(right, collate);
}
},
NOT_EQUALS("!=", "<>") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
if (left == null || right == null) {
return null;
}
if (left.isNull() || right.isNull()) {
return SQLite3Constant.createNullConstant();
} else {
SQLite3Constant applyEquals = left.applyEquals(right, collate);
if (applyEquals == null) {
return null;
}
boolean equals = applyEquals.asInt() == 1;
return SQLite3Constant.createBoolean(!equals);
}
}
},
IS("IS") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
if (left == null || right == null) {
return null;
} else if (left.isNull()) {
return SQLite3Constant.createBoolean(right.isNull());
} else if (right.isNull()) {
return SQLite3Constant.createFalse();
} else {
return left.applyEquals(right, collate);
}
}
},
IS_NOT("IS NOT") {
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
if (left == null || right == null) {
return null;
} else if (left.isNull()) {
return SQLite3Constant.createBoolean(!right.isNull());
} else if (right.isNull()) {
return SQLite3Constant.createTrue();
} else {
SQLite3Constant applyEquals = left.applyEquals(right, collate);
if (applyEquals == null) {
return null;
}
boolean equals = applyEquals.asInt() == 1;
return SQLite3Constant.createBoolean(!equals);
}
}
},
LIKE("LIKE") {
@Override
public boolean shouldApplyAffinity() {
return false;
}
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
if (left == null || right == null) {
return null;
}
if (left.isNull() || right.isNull()) {
return SQLite3Constant.createNullConstant();
}
SQLite3Constant leftStr = SQLite3Cast.castToText(left);
SQLite3Constant rightStr = SQLite3Cast.castToText(right);
if (leftStr == null || rightStr == null) {
return null;
}
boolean val = LikeImplementationHelper.match(leftStr.asString(), rightStr.asString(), 0, 0, false);
return SQLite3Constant.createBoolean(val);
}
},
GLOB("GLOB") {
@Override
public boolean shouldApplyAffinity() {
return false;
}
@Override
SQLite3Constant apply(SQLite3Constant left, SQLite3Constant right, SQLite3CollateSequence collate) {
if (left == null || right == null) {
return null;
}
if (left.isNull() || right.isNull()) {
return SQLite3Constant.createNullConstant();
}
SQLite3Constant leftStr = SQLite3Cast.castToText(left);
SQLite3Constant rightStr = SQLite3Cast.castToText(right);
if (leftStr == null || rightStr == null) {
return null;
}
boolean val = match(leftStr.asString(), rightStr.asString(), 0, 0);
return SQLite3Constant.createBoolean(val);
}
private boolean match(String str, String regex, int regexPosition, int strPosition) {
if (strPosition == str.length() && regexPosition == regex.length()) {
return true;
}
if (regexPosition >= regex.length()) {
return false;
}
char cur = regex.charAt(regexPosition);
if (strPosition >= str.length()) {
if (cur == '*') {
return match(str, regex, regexPosition + 1, strPosition);
} else {
return false;
}
}
switch (cur) {
case '[':
int endingBrackets = regexPosition;
do {
endingBrackets++;
if (endingBrackets >= regex.length()) {
return false;
}
} while (regex.charAt(endingBrackets) != ']');
StringBuilder patternInBrackets = new StringBuilder(
regex.substring(regexPosition + 1, endingBrackets));
boolean inverted;
if (patternInBrackets.toString().startsWith("^")) {
if (patternInBrackets.length() > 1) {
inverted = true;
patternInBrackets = new StringBuilder(patternInBrackets.substring(1));
} else {
return false;
}
} else {
inverted = false;
}
int currentSearchIndex = 0;
boolean found = false;
do {
int minusPosition = patternInBrackets.toString().indexOf('-', currentSearchIndex);
boolean minusAtBoundaries = minusPosition == 0
|| minusPosition == patternInBrackets.length() - 1;
if (minusPosition == -1 || minusAtBoundaries) {
break;
}
found = true;
StringBuilder expandedPattern = new StringBuilder();
for (char start = patternInBrackets.charAt(minusPosition - 1); start < patternInBrackets
.charAt(minusPosition + 1); start += 1) {
expandedPattern.append(start);
}
patternInBrackets.replace(minusPosition, minusPosition + 1, expandedPattern.toString());
currentSearchIndex = minusPosition + expandedPattern.length();
} while (found);
if (patternInBrackets.length() > 0) {
char textChar = str.charAt(strPosition);
boolean contains = patternInBrackets.toString().contains(Character.toString(textChar));
if (contains && !inverted || !contains && inverted) {
return match(str, regex, endingBrackets + 1, strPosition + 1);
} else {
return false;