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DuckDBToStringVisitor.java
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91 lines (83 loc) · 2.84 KB
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package sqlancer.duckdb;
import sqlancer.common.ast.newast.NewToStringVisitor;
import sqlancer.common.ast.newast.Node;
import sqlancer.duckdb.ast.DuckDBConstant;
import sqlancer.duckdb.ast.DuckDBExpression;
import sqlancer.duckdb.ast.DuckDBJoin;
import sqlancer.duckdb.ast.DuckDBSelect;
public class DuckDBToStringVisitor extends NewToStringVisitor<DuckDBExpression> {
@Override
public void visitSpecific(Node<DuckDBExpression> expr) {
if (expr instanceof DuckDBConstant) {
visit((DuckDBConstant) expr);
} else if (expr instanceof DuckDBSelect) {
visit((DuckDBSelect) expr);
} else if (expr instanceof DuckDBJoin) {
visit((DuckDBJoin) expr);
} else {
throw new AssertionError(expr.getClass());
}
}
private void visit(DuckDBJoin join) {
visit(join.getLeftTable());
sb.append(" ");
sb.append(join.getJoinType());
sb.append(" ");
if (join.getOuterType() != null) {
sb.append(join.getOuterType());
}
sb.append(" JOIN ");
visit(join.getRightTable());
if (join.getOnCondition() != null) {
sb.append(" ON ");
visit(join.getOnCondition());
}
}
private void visit(DuckDBConstant constant) {
sb.append(constant.toString());
}
private void visit(DuckDBSelect 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.getOrderByExpressions().isEmpty()) {
sb.append(" ORDER BY ");
visit(select.getOrderByExpressions());
}
if (select.getLimitClause() != null) {
sb.append(" LIMIT ");
visit(select.getLimitClause());
}
if (select.getOffsetClause() != null) {
sb.append(" OFFSET ");
visit(select.getOffsetClause());
}
}
public static String asString(Node<DuckDBExpression> expr) {
DuckDBToStringVisitor visitor = new DuckDBToStringVisitor();
visitor.visit(expr);
return visitor.get();
}
}