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QuestDBToStringVisitor.java
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66 lines (60 loc) · 2.16 KB
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package sqlancer.questdb;
import sqlancer.common.ast.newast.NewToStringVisitor;
import sqlancer.questdb.ast.QuestDBConstant;
import sqlancer.questdb.ast.QuestDBExpression;
import sqlancer.questdb.ast.QuestDBSelect;
public class QuestDBToStringVisitor extends NewToStringVisitor<QuestDBExpression> {
@Override
public void visitSpecific(QuestDBExpression expr) {
if (expr instanceof QuestDBConstant) {
visit((QuestDBConstant) expr);
} else if (expr instanceof QuestDBSelect) {
visit((QuestDBSelect) expr);
} else { // TODO: maybe implement QuestDBJoin
throw new AssertionError("Unknown class: " + expr.getClass());
}
}
private void visit(QuestDBConstant constant) {
sb.append(constant.toString());
}
private void visit(QuestDBSelect select) {
sb.append("SELECT ");
if (select.isDistinct()) {
sb.append("DISTINCT ");
}
visit(select.getFetchColumns());
sb.append(" FROM ");
visit(select.getFromList());
if (!select.getFromList().isEmpty() && !select.getJoinList().isEmpty()) {
sb.append(", ");
}
if (!select.getJoinList().isEmpty()) {
visit(select.getJoinList());
}
if (select.getWhereClause() != null) {
sb.append(" WHERE ");
visit(select.getWhereClause());
}
// if (!select.getGroupByExpressions().isEmpty()) {
// sb.append(" GROUP BY ");
// visit(select.getGroupByExpressions());
// }
// if (select.getHavingClause() != null) {
// sb.append(" HAVING ");
// visit(select.getHavingClause());
// }
// if (!select.getOrderByClauses().isEmpty()) {
// sb.append(" ORDER BY ");
// visit(select.getOrderByClauses());
// }
if (select.getLimitClause() != null) {
sb.append(" LIMIT ");
visit(select.getLimitClause());
}
}
public static String asString(QuestDBExpression expr) {
QuestDBToStringVisitor visitor = new QuestDBToStringVisitor();
visitor.visit(expr);
return visitor.get();
}
}