tedyu commented on a change in pull request #31613:
URL: https://github.com/apache/spark/pull/31613#discussion_r581566633
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File path: sql/core/src/test/resources/sql-tests/results/postgreSQL/join.sql.out
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@@ -3225,7 +3225,7 @@ select * from
struct<>
-- !query output
org.apache.spark.sql.AnalysisException
-Reference 'f1' is ambiguous, could be: j.f1, j.f1.; line 2 pos 63
+Reference 'f1' is ambiguous, could be: j.f1#x, j.f1#x.; line 2 pos 63
Review comment:
Considering snippet of physical plan:
```
+- BatchScan[id#6, address#7, phone->'key'->1->'m'->2->>'b'#10,
phone->'key'->1->'m'->2->'b'#12] Cassandra Scan: test.person
```
multiple json path expressions would be accompanied by ExprId.id. It would
be easier to match the reference (with exprId.id) given in the
AnalysisException with the expression.
w.r.t. get_json_string, it is a function which is interpreted by Spark
extension, translating arguments to json path expression.
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