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Copy pathDataFusionToStringVisitor.java
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98 lines (86 loc) · 3.12 KB
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package sqlancer.datafusion;
import java.util.List;
import sqlancer.common.ast.newast.NewToStringVisitor;
import sqlancer.datafusion.ast.DataFusionConstant;
import sqlancer.datafusion.ast.DataFusionExpression;
import sqlancer.datafusion.ast.DataFusionJoin;
import sqlancer.datafusion.ast.DataFusionSelect;
public class DataFusionToStringVisitor extends NewToStringVisitor<DataFusionExpression> {
public static String asString(DataFusionExpression expr) {
DataFusionToStringVisitor visitor = new DataFusionToStringVisitor();
visitor.visit(expr);
return visitor.get();
}
public static String asString(List<DataFusionExpression> exprs) {
DataFusionToStringVisitor visitor = new DataFusionToStringVisitor();
visitor.visit(exprs);
return visitor.get();
}
@Override
public void visitSpecific(DataFusionExpression expr) {
if (expr instanceof DataFusionConstant) {
visit((DataFusionConstant) expr);
} else if (expr instanceof DataFusionSelect) {
visit((DataFusionSelect) expr);
} else if (expr instanceof DataFusionJoin) {
visit((DataFusionJoin) expr);
} else {
throw new AssertionError(expr.getClass());
}
}
private void visit(DataFusionJoin join) {
visit((DataFusionExpression) join.getLeftTable());
sb.append(" ");
sb.append(join.getJoinType());
sb.append(" ");
sb.append(" JOIN ");
visit((DataFusionExpression) join.getRightTable());
if (join.getOnCondition() != null) {
sb.append(" ON ");
visit(join.getOnCondition());
}
}
private void visit(DataFusionConstant constant) {
sb.append(constant.toString());
}
private void visit(DataFusionSelect select) {
sb.append("SELECT ");
if (select.fetchColumnsString.isPresent()) {
sb.append(select.fetchColumnsString.get());
} else {
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());
}
if (select.getOffsetClause() != null) {
sb.append(" OFFSET ");
visit(select.getOffsetClause());
}
}
}