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DatabendTableGenerator.java
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package sqlancer.databend.gen;
import java.util.ArrayList;
import java.util.List;
import sqlancer.Randomly;
import sqlancer.common.gen.TypedExpressionGenerator;
import sqlancer.common.query.ExpectedErrors;
import sqlancer.common.query.SQLQueryAdapter;
import sqlancer.databend.DatabendErrors;
import sqlancer.databend.DatabendProvider.DatabendGlobalState;
import sqlancer.databend.DatabendSchema.DatabendColumn;
import sqlancer.databend.DatabendSchema.DatabendCompositeDataType;
import sqlancer.databend.DatabendSchema.DatabendDataType;
import sqlancer.databend.DatabendToStringVisitor;
import sqlancer.databend.ast.DatabendExpression;
public class DatabendTableGenerator {
public SQLQueryAdapter getQuery(DatabendGlobalState globalState) {
ExpectedErrors errors = new ExpectedErrors();
DatabendErrors.addExpressionErrors(errors);
StringBuilder sb = new StringBuilder();
String tableName = globalState.getSchema().getFreeTableName();
sb.append("CREATE TABLE ");
sb.append(tableName);
sb.append("(");
List<DatabendColumn> columns = getNewColumns();
TypedExpressionGenerator<DatabendExpression, DatabendColumn, DatabendDataType> gen = new DatabendNewExpressionGenerator(
globalState).setColumns(columns);
for (int i = 0; i < columns.size(); i++) {
if (i != 0) {
sb.append(", ");
}
sb.append(columns.get(i).getName());
sb.append(" ");
sb.append(columns.get(i).getType());
if (globalState.getDbmsSpecificOptions().testNotNullConstraints
&& Randomly.getBooleanWithRatherLowProbability()) {
sb.append(" NOT NULL");
} else {
sb.append(" NULL"); // Databend 默认字段为非空，这个将它默认设置为允许空
}
if (Randomly.getBoolean() && globalState.getDbmsSpecificOptions().testDefaultValues) {
sb.append(" DEFAULT(");
sb.append(DatabendToStringVisitor.asString(// 常量类型于字段类型等同
gen.generateConstant(columns.get(i).getType().getPrimitiveDataType())));
sb.append(")");
}
}
sb.append(")");
return new SQLQueryAdapter(sb.toString(), errors, true);
}
private static List<DatabendColumn> getNewColumns() {
List<DatabendColumn> columns = new ArrayList<>();
for (int i = 0; i < Randomly.smallNumber() + 1; i++) {
DatabendCompositeDataType columnType = DatabendCompositeDataType.getRandomWithoutNull();
String columnName = String.format("c%d%s", i, columnType.getPrimitiveDataType().toString());
columns.add(new DatabendColumn(columnName, columnType, false, false));
}
return columns;
}
}