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DorisToStringVisitor.java
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168 lines (157 loc) · 5.25 KB
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package sqlancer.doris.visitor;
import sqlancer.Randomly;
import sqlancer.common.ast.newast.NewToStringVisitor;
import sqlancer.doris.ast.DorisCaseOperation;
import sqlancer.doris.ast.DorisCastOperation;
import sqlancer.doris.ast.DorisConstant;
import sqlancer.doris.ast.DorisExpression;
import sqlancer.doris.ast.DorisFunctionOperation;
import sqlancer.doris.ast.DorisJoin;
import sqlancer.doris.ast.DorisSelect;
public class DorisToStringVisitor extends NewToStringVisitor<DorisExpression> {
@Override
public void visitSpecific(DorisExpression expr) {
if (expr instanceof DorisConstant) {
visit((DorisConstant) expr);
} else if (expr instanceof DorisSelect) {
visit((DorisSelect) expr);
} else if (expr instanceof DorisJoin) {
visit((DorisJoin) expr);
} else if (expr instanceof DorisCastOperation) {
visit((DorisCastOperation) expr);
} else if (expr instanceof DorisCaseOperation) {
visit((DorisCaseOperation) expr);
} else if (expr instanceof DorisFunctionOperation) {
visit((DorisFunctionOperation) expr);
} else {
throw new AssertionError(expr.getClass());
}
}
private void visit(DorisJoin join) {
sb.append(" ");
visit((DorisExpression) join.getLeftTable());
sb.append(" ");
switch (join.getJoinType()) {
case INNER:
if (Randomly.getBoolean()) {
sb.append("INNER ");
} else {
sb.append("CROSS ");
}
sb.append("JOIN ");
break;
case LEFT:
sb.append("LEFT ");
if (Randomly.getBoolean()) {
sb.append(" OUTER ");
}
sb.append("JOIN ");
break;
case RIGHT:
sb.append("RIGHT ");
if (Randomly.getBoolean()) {
sb.append(" OUTER ");
}
sb.append("JOIN ");
break;
case STRAIGHT:
sb.append("STRAIGHT_JOIN ");
break;
default:
throw new AssertionError();
}
visit((DorisExpression) join.getRightTable());
sb.append(" ");
if (join.getOnCondition() != null) {
sb.append("ON ");
visit(join.getOnCondition());
}
}
private void visit(DorisConstant constant) {
sb.append(constant.toString());
}
private void visit(DorisCastOperation castExpr) {
sb.append("CAST(");
visit(castExpr.getExpr());
sb.append(" AS ");
sb.append(castExpr.getType().toString());
sb.append(") ");
}
private void visit(DorisFunctionOperation func) {
sb.append(func.getFunction().getFunctionName());
sb.append("(");
if (func.getArgs() != null) {
for (int i = 0; i < func.getArgs().size(); i++) {
visit(func.getArgs().get(i));
if (i != func.getArgs().size() - 1) {
sb.append(",");
}
}
}
sb.append(") ");
}
private void visit(DorisCaseOperation cases) {
sb.append("CASE ");
visit(cases.getExpr());
sb.append(" ");
for (int i = 0; i < cases.getConditions().size(); i++) {
DorisExpression predicate = cases.getConditions().get(i);
DorisExpression then = cases.getThenClauses().get(i);
sb.append(" WHEN ");
visit(predicate);
sb.append(" THEN ");
visit(then);
sb.append(" ");
}
if (cases.getElseClause() != null) {
sb.append("ELSE ");
visit(cases.getElseClause());
sb.append(" ");
}
sb.append("END ");
}
private void visit(DorisSelect 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());
}
if (select.getOffsetClause() != null) {
sb.append(" OFFSET ");
visit(select.getOffsetClause());
}
}
public static String asString(DorisExpression expr) {
DorisToStringVisitor visitor = new DorisToStringVisitor();
visitor.visit(expr);
return visitor.get();
}
}