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SQLancer finds logic bugs in Database Management Systems through automatic testing
package sqlancer.duckdb;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
import sqlancer.SQLConnection;
import sqlancer.common.DBMSCommon;
import sqlancer.common.schema.AbstractRelationalTable;
import sqlancer.common.schema.AbstractSchema;
import sqlancer.common.schema.AbstractTableColumn;
import sqlancer.common.schema.AbstractTables;
import sqlancer.common.schema.TableIndex;
import sqlancer.duckdb.DuckDBProvider.DuckDBGlobalState;
import sqlancer.duckdb.DuckDBSchema.DuckDBTable;
public class DuckDBSchema extends AbstractSchema {
public enum DuckDBDataType {
INT, VARCHAR, BOOLEAN, FLOAT, DATE, TIMESTAMP;
public static DuckDBDataType getRandom() {
return Randomly.fromOptions(values());
}
}
public static class DuckDBCompositeDataType {
private final DuckDBDataType dataType;
private final int size;
public DuckDBCompositeDataType(DuckDBDataType dataType, int size) {
this.dataType = dataType;
this.size = size;
}
public DuckDBDataType getPrimitiveDataType() {
return dataType;
}
public int getSize() {
if (size == -1) {
throw new AssertionError(this);
}
return size;
}
public static DuckDBCompositeDataType getRandom() {
DuckDBDataType type = DuckDBDataType.getRandom();
int size = -1;
switch (type) {
case INT:
size = Randomly.fromOptions(1, 2, 4, 8);
break;
case FLOAT:
size = Randomly.fromOptions(4, 8);
break;
case BOOLEAN:
case VARCHAR:
case DATE:
case TIMESTAMP:
size = 0;
break;
default:
throw new AssertionError(type);
}
return new DuckDBCompositeDataType(type, size);
}
@Override
public String toString() {
switch (getPrimitiveDataType()) {
case INT:
switch (size) {
case 8:
return Randomly.fromOptions("BIGINT", "INT8");
case 4:
return Randomly.fromOptions("INTEGER", "INT", "INT4", "SIGNED");
case 2:
return Randomly.fromOptions("SMALLINT", "INT2");
case 1:
return Randomly.fromOptions("TINYINT", "INT1");
default:
throw new AssertionError(size);
}
case VARCHAR:
return "VARCHAR";
case FLOAT:
switch (size) {
case 8:
return Randomly.fromOptions("DOUBLE");
case 4:
return Randomly.fromOptions("REAL", "FLOAT4");
default:
throw new AssertionError(size);
}
case BOOLEAN:
return Randomly.fromOptions("BOOLEAN", "BOOL");
case TIMESTAMP:
return Randomly.fromOptions("TIMESTAMP", "DATETIME");
case DATE:
return Randomly.fromOptions("DATE");
default:
throw new AssertionError(getPrimitiveDataType());
}
}
}
public static class DuckDBColumn extends AbstractTableColumn {
private final boolean isPrimaryKey;
private final boolean isNullable;
public DuckDBColumn(String name, DuckDBCompositeDataType columnType, boolean isPrimaryKey, boolean isNullable) {
super(name, null, columnType);
this.isPrimaryKey = isPrimaryKey;
this.isNullable = isNullable;
}
public boolean isPrimaryKey() {
return isPrimaryKey;
}
public boolean isNullable() {
return isNullable;
}
}
public static class DuckDBTables extends AbstractTables {
public DuckDBTables(List tables) {
super(tables);
}
}
public DuckDBSchema(List databaseTables) {
super(databaseTables);
}
public DuckDBTables getRandomTableNonEmptyTables() {
return new DuckDBTables(Randomly.nonEmptySubset(getDatabaseTables()));
}
private static DuckDBCompositeDataType getColumnType(String typeString) {
DuckDBDataType primitiveType;
int size = -1;
if (typeString.startsWith("DECIMAL")) { // Ugly hack
return new DuckDBCompositeDataType(DuckDBDataType.FLOAT, 8);
}
switch (typeString) {
case "INTEGER":
primitiveType = DuckDBDataType.INT;
size = 4;
break;
case "SMALLINT":
primitiveType = DuckDBDataType.INT;
size = 2;
break;
case "BIGINT":
case "HUGEINT": // TODO: 16-bit int
primitiveType = DuckDBDataType.INT;
size = 8;
break;
case "TINYINT":
primitiveType = DuckDBDataType.INT;
size = 1;
break;
case "VARCHAR":
primitiveType = DuckDBDataType.VARCHAR;
break;
case "FLOAT":
primitiveType = DuckDBDataType.FLOAT;
size = 4;
break;
case "DOUBLE":
primitiveType = DuckDBDataType.FLOAT;
size = 8;
break;
case "BOOLEAN":
primitiveType = DuckDBDataType.BOOLEAN;
break;
case "DATE":
primitiveType = DuckDBDataType.DATE;
break;
case "TIMESTAMP":
primitiveType = DuckDBDataType.TIMESTAMP;
break;
case "INTERVAL":
throw new IgnoreMeException();
// TODO: caused when a view contains a computation like ((TIMESTAMP '1970-01-05 11:26:57')-(TIMESTAMP
// '1969-12-29 06:50:27'))
default:
throw new AssertionError(typeString);
}
return new DuckDBCompositeDataType(primitiveType, size);
}
public static class DuckDBTable extends AbstractRelationalTable {
public DuckDBTable(String tableName, List columns, boolean isView) {
super(tableName, columns, Collections.emptyList(), isView);
}
}
public static DuckDBSchema fromConnection(SQLConnection con, String databaseName) throws SQLException {
List databaseTables = new ArrayList<>();
List tableNames = getTableNames(con);
for (String tableName : tableNames) {
if (DBMSCommon.matchesIndexName(tableName)) {
continue; // TODO: unexpected?
}
List databaseColumns = getTableColumns(con, tableName);
boolean isView = tableName.startsWith("v");
DuckDBTable t = new DuckDBTable(tableName, databaseColumns, isView);
for (DuckDBColumn c : databaseColumns) {
c.setTable(t);
}
databaseTables.add(t);
}
return new DuckDBSchema(databaseTables);
}
private static List getTableNames(SQLConnection con) throws SQLException {
List tableNames = new ArrayList<>();
try (Statement s = con.createStatement()) {
try (ResultSet rs = s.executeQuery("SELECT * FROM sqlite_master()")) {
while (rs.next()) {
tableNames.add(rs.getString("name"));
}
}
}
return tableNames;
}
private static List getTableColumns(SQLConnection con, String tableName) throws SQLException {
List columns = new ArrayList<>();
try (Statement s = con.createStatement()) {
try (ResultSet rs = s.executeQuery(String.format("SELECT * FROM pragma_table_info('%s');", tableName))) {
while (rs.next()) {
String columnName = rs.getString("name");
String dataType = rs.getString("type");
boolean isNullable = rs.getString("notnull").contentEquals("false");
boolean isPrimaryKey = rs.getString("pk").contains("true");
DuckDBColumn c = new DuckDBColumn(columnName, getColumnType(dataType), isPrimaryKey, isNullable);
columns.add(c);
}
}
}
if (columns.stream().noneMatch(c -> c.isPrimaryKey())) {
// https://github.com/cwida/duckdb/issues/589
// https://github.com/cwida/duckdb/issues/588
// TODO: implement an option to enable/disable rowids
columns.add(new DuckDBColumn("rowid", new DuckDBCompositeDataType(DuckDBDataType.INT, 4), false, false));
}
return columns;
}
}