Gengliang Wang created SPARK-23079:
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Summary: Fix query constraints propagation with aliases
Key: SPARK-23079
URL: https://issues.apache.org/jira/browse/SPARK-23079
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.2.1
Reporter: Gengliang Wang
Previously, PR #19201 fix the problem of non-converging constraints.
After that PR #19149 improve the loop and constraints is inferred only once.
So the problem of non-converging constraints is gone.
Also, in current code, the case below will fail.
```
spark.range(5).write.saveAsTable("t")
val t = spark.read.table("t")
val left = t.withColumn("xid", $"id" + lit(1)).as("x")
val right = t.withColumnRenamed("id", "xid").as("y")
val df = left.join(right, "xid").filter("id = 3").toDF()
checkAnswer(df, Row(4, 3))
```
Because of `aliasMap` replace all the aliased child. See the test case in PR
for details.
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