Maxim Gekk created SPARK-33585:
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Summary: The comment for SQLContext.tables() doesn't mention the
`database` column
Key: SPARK-33585
URL: https://issues.apache.org/jira/browse/SPARK-33585
Project: Spark
Issue Type: Documentation
Components: SQL
Affects Versions: 3.0.1, 2.4.7, 3.1.0
Reporter: Maxim Gekk
The comment says: "The returned DataFrame has two columns, tableName and
isTemporary":
https://github.com/apache/spark/blob/b26ae98407c6c017a4061c0c420f48685ddd6163/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala#L664
but actually the dataframe has 3 columns:
{code:scala}
scala> spark.range(10).createOrReplaceTempView("view1")
scala> val tables = spark.sqlContext.tables()
tables: org.apache.spark.sql.DataFrame = [database: string, tableName: string
... 1 more field]
scala> tables.printSchema
root
|-- database: string (nullable = false)
|-- tableName: string (nullable = false)
|-- isTemporary: boolean (nullable = false)
scala> tables.show
+--------+---------+-----------+
|database|tableName|isTemporary|
+--------+---------+-----------+
| default| t1| false|
| default| t2| false|
| default| ymd| false|
| | view1| true|
+--------+---------+-----------+
{code}
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