Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/17067#discussion_r103849486
--- Diff:
sql/core/src/test/resources/sql-tests/results/columnresolution-negative.sql.out
---
@@ -0,0 +1,240 @@
+-- Automatically generated by SQLQueryTestSuite
+-- Number of queries: 28
+
+
+-- !query 0
+CREATE DATABASE mydb1
+-- !query 0 schema
+struct<>
+-- !query 0 output
+
+
+
+-- !query 1
+USE mydb1
+-- !query 1 schema
+struct<>
+-- !query 1 output
+
+
+
+-- !query 2
+CREATE TABLE t1 USING parquet AS SELECT 1 AS i1
+-- !query 2 schema
+struct<>
+-- !query 2 output
+
+
+
+-- !query 3
+CREATE DATABASE mydb2
+-- !query 3 schema
+struct<>
+-- !query 3 output
+
+
+
+-- !query 4
+USE mydb2
+-- !query 4 schema
+struct<>
+-- !query 4 output
+
+
+
+-- !query 5
+CREATE TABLE t1 USING parquet AS SELECT 20 AS i1
+-- !query 5 schema
+struct<>
+-- !query 5 output
+
+
+
+-- !query 6
+set spark.sql.crossJoin.enabled = true
+-- !query 6 schema
+struct<key:string,value:string>
+-- !query 6 output
+spark.sql.crossJoin.enabled true
+
+
+-- !query 7
+USE mydb1
+-- !query 7 schema
+struct<>
+-- !query 7 output
+
+
+
+-- !query 8
+SELECT i1 FROM t1, mydb1.t1
+-- !query 8 schema
+struct<>
+-- !query 8 output
+org.apache.spark.sql.AnalysisException
+Reference 'i1' is ambiguous, could be: i1#x, i1#x.; line 1 pos 7
+
+
+-- !query 9
+SELECT t1.i1 FROM t1, mydb1.t1
+-- !query 9 schema
+struct<>
+-- !query 9 output
+org.apache.spark.sql.AnalysisException
+Reference 't1.i1' is ambiguous, could be: i1#x, i1#x.; line 1 pos 7
--- End diff --
To the other reviewer, this is the reason why we need to make a change in
`SQLQueryTestSuite.scala`
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