morningman commented on a change in pull request #3357:
URL: https://github.com/apache/incubator-doris/pull/3357#discussion_r413035997
##########
File path: fe/src/main/java/org/apache/doris/analysis/SelectStmt.java
##########
@@ -1362,9 +1362,24 @@ private void rewriteSelectList(ExprRewriter rewriter)
throws AnalysisException {
if
(!item.getExpr().contains(Predicates.instanceOf(Subquery.class))) {
continue;
}
+ CaseExpr caseExpr = (CaseExpr) item.getExpr();
+
+ int childIdx = 0;
+ if (caseExpr.hasCaseExpr()
+ &&
caseExpr.getChild(childIdx++).contains(Predicates.instanceOf(Subquery.class))) {
+ throw new AnalysisException("Only support subquery in binary
predicate in case statement.");
+ }
+ while (childIdx + 2 <= caseExpr.getChildren().size()) {
+ Expr child = caseExpr.getChild(childIdx++);
+ // case
Review comment:
`caseExpr.getChild(childIdx++)` here you got the `when` expr
##########
File path: fe/src/main/java/org/apache/doris/analysis/SelectStmt.java
##########
@@ -1362,9 +1362,24 @@ private void rewriteSelectList(ExprRewriter rewriter)
throws AnalysisException {
if
(!item.getExpr().contains(Predicates.instanceOf(Subquery.class))) {
continue;
}
+ CaseExpr caseExpr = (CaseExpr) item.getExpr();
+
+ int childIdx = 0;
+ if (caseExpr.hasCaseExpr()
+ &&
caseExpr.getChild(childIdx++).contains(Predicates.instanceOf(Subquery.class))) {
+ throw new AnalysisException("Only support subquery in binary
predicate in case statement.");
+ }
+ while (childIdx + 2 <= caseExpr.getChildren().size()) {
+ Expr child = caseExpr.getChild(childIdx++);
+ // case
+ if (!(child instanceof BinaryPredicate) &&
child.contains(Predicates.instanceOf(Subquery.class))) {
+ throw new AnalysisException("Only support subquery in
binary predicate in case statement.");
+ }
+ // when
Review comment:
Here is to skip `then` expr, not `when`
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