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DuckDBIndexGenerator.java
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50 lines (44 loc) · 1.74 KB
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package sqlancer.duckdb.gen;
import java.util.List;
import sqlancer.Randomly;
import sqlancer.common.query.ExpectedErrors;
import sqlancer.common.query.SQLQueryAdapter;
import sqlancer.duckdb.DuckDBProvider.DuckDBGlobalState;
import sqlancer.duckdb.DuckDBSchema.DuckDBColumn;
import sqlancer.duckdb.DuckDBSchema.DuckDBTable;
public final class DuckDBIndexGenerator {
private DuckDBIndexGenerator() {
}
public static SQLQueryAdapter getQuery(DuckDBGlobalState globalState) {
ExpectedErrors errors = new ExpectedErrors();
StringBuilder sb = new StringBuilder();
sb.append("CREATE ");
if (Randomly.getBoolean()) {
errors.add("Data contains duplicates on indexed column(s)");
sb.append("UNIQUE ");
}
sb.append("INDEX ");
sb.append(Randomly.fromOptions("i0", "i1", "i2", "i3", "i4")); // cannot query this information
sb.append(" ON ");
DuckDBTable table = globalState.getSchema().getRandomTable(t -> !t.isView());
sb.append(table.getName());
sb.append("(");
List<DuckDBColumn> columns = table.getRandomNonEmptyColumnSubset();
for (int i = 0; i < columns.size(); i++) {
if (i != 0) {
sb.append(", ");
}
sb.append(columns.get(i).getName());
sb.append(" ");
if (Randomly.getBooleanWithRatherLowProbability()) {
sb.append(Randomly.fromOptions("ASC", "DESC"));
}
}
sb.append(")");
errors.add("already exists!");
if (globalState.getDbmsSpecificOptions().testRowid) {
errors.add("Cannot create an index on the rowid!");
}
return new SQLQueryAdapter(sb.toString(), errors, true);
}
}