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TiDBIndexGenerator.java
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69 lines (62 loc) · 2.78 KB
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package sqlancer.tidb.gen;
import java.sql.SQLException;
import java.util.List;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
import sqlancer.common.query.ExpectedErrors;
import sqlancer.common.query.SQLQueryAdapter;
import sqlancer.tidb.TiDBProvider.TiDBGlobalState;
import sqlancer.tidb.TiDBSchema.TiDBColumn;
import sqlancer.tidb.TiDBSchema.TiDBTable;
public final class TiDBIndexGenerator {
private TiDBIndexGenerator() {
}
public static SQLQueryAdapter getQuery(TiDBGlobalState globalState) throws SQLException {
if (globalState.getSchema().getIndexCount() > globalState.getDbmsSpecificOptions().maxNumIndexes) {
throw new IgnoreMeException();
}
ExpectedErrors errors = new ExpectedErrors();
TiDBTable randomTable = globalState.getSchema().getRandomTable(t -> !t.isView());
String indexName = globalState.getSchema().getFreeIndexName();
StringBuilder sb = new StringBuilder("CREATE ");
if (Randomly.getBooleanWithRatherLowProbability()) {
sb.append("UNIQUE ");
errors.add("Duplicate for key");
errors.add("Duplicate entry ");
errors.add("A UNIQUE INDEX must include all columns in the table's partitioning function");
}
sb.append("INDEX ");
sb.append(indexName);
sb.append(" ON ");
sb.append(randomTable.getName());
sb.append("(");
int nr = Math.min(Randomly.smallNumber() + 1, randomTable.getColumns().size());
List<TiDBColumn> subset = Randomly.extractNrRandomColumns(randomTable.getColumns(), nr);
for (int i = 0; i < subset.size(); i++) {
if (i != 0) {
sb.append(", ");
}
sb.append(subset.get(i).getName());
if (!randomTable.isView()) {
// TODO: otherwise: Incorrect prefix key; the used key part isn't a string, the
// used length is longer than the key part, or the storage engine doesn't
// support unique prefix keys
TiDBTableGenerator.appendSpecifiers(sb, subset.get(i).getType().getPrimitiveDataType());
}
if (Randomly.getBoolean()) {
sb.append(" ");
sb.append(Randomly.fromOptions("ASC", "DESC"));
}
}
sb.append(")");
if (Randomly.getBooleanWithRatherLowProbability()) {
sb.append(" KEY_BLOCK_SIZE ");
sb.append(Randomly.getPositiveOrZeroNonCachedInteger());
}
errors.add("Cannot decode index value, because"); // invalid value for generated column
errors.add("index already exist");
errors.add("Data truncation");
errors.add("key was too long");
return new SQLQueryAdapter(sb.toString(), errors, true);
}
}