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MySQLInsertGenerator.java
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96 lines (83 loc) · 3.09 KB
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package sqlancer.mysql.gen;
import java.sql.SQLException;
import java.util.List;
import java.util.stream.Collectors;
import sqlancer.Randomly;
import sqlancer.common.query.ExpectedErrors;
import sqlancer.common.query.SQLQueryAdapter;
import sqlancer.mysql.MySQLErrors;
import sqlancer.mysql.MySQLGlobalState;
import sqlancer.mysql.MySQLSchema.MySQLColumn;
import sqlancer.mysql.MySQLSchema.MySQLTable;
import sqlancer.mysql.MySQLVisitor;
public class MySQLInsertGenerator {
private final MySQLTable table;
private final StringBuilder sb = new StringBuilder();
private final ExpectedErrors errors = new ExpectedErrors();
private final MySQLGlobalState globalState;
public MySQLInsertGenerator(MySQLGlobalState globalState, MySQLTable table) {
this.globalState = globalState;
this.table = table;
}
public static SQLQueryAdapter insertRow(MySQLGlobalState globalState) throws SQLException {
MySQLTable table = globalState.getSchema().getRandomTable();
return insertRow(globalState, table);
}
public static SQLQueryAdapter insertRow(MySQLGlobalState globalState, MySQLTable table) throws SQLException {
if (Randomly.getBoolean()) {
return new MySQLInsertGenerator(globalState, table).generateInsert();
} else {
return new MySQLInsertGenerator(globalState, table).generateReplace();
}
}
private SQLQueryAdapter generateReplace() {
sb.append("REPLACE");
if (Randomly.getBoolean()) {
sb.append(" ");
sb.append(Randomly.fromOptions("LOW_PRIORITY", "DELAYED"));
}
return generateInto();
}
private SQLQueryAdapter generateInsert() {
sb.append("INSERT");
if (Randomly.getBoolean()) {
sb.append(" ");
sb.append(Randomly.fromOptions("LOW_PRIORITY", "DELAYED", "HIGH_PRIORITY"));
}
if (Randomly.getBoolean()) {
sb.append(" IGNORE");
}
return generateInto();
}
private SQLQueryAdapter generateInto() {
sb.append(" INTO ");
sb.append(table.getName());
List<MySQLColumn> columns = table.getRandomNonEmptyColumnSubset();
sb.append("(");
sb.append(columns.stream().map(c -> c.getName()).collect(Collectors.joining(", ")));
sb.append(") ");
sb.append("VALUES");
MySQLExpressionGenerator gen = new MySQLExpressionGenerator(globalState);
int nrRows;
if (Randomly.getBoolean()) {
nrRows = 1;
} else {
nrRows = 1 + Randomly.smallNumber();
}
for (int row = 0; row < nrRows; row++) {
if (row != 0) {
sb.append(", ");
}
sb.append("(");
for (int c = 0; c < columns.size(); c++) {
if (c != 0) {
sb.append(", ");
}
sb.append(MySQLVisitor.asString(gen.generateConstant()));
}
sb.append(")");
}
MySQLErrors.addInsertUpdateErrors(errors);
return new SQLQueryAdapter(sb.toString(), errors);
}
}