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https://issues.apache.org/jira/browse/SPARK-25816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li resolved SPARK-25816.
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Resolution: Fixed
Fix Version/s: 2.4.0
2.3.3
> Functions does not resolve Columns correctly
> --------------------------------------------
>
> Key: SPARK-25816
> URL: https://issues.apache.org/jira/browse/SPARK-25816
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0, 2.3.1, 2.3.2, 2.4.0
> Reporter: Brian Zhang
> Assignee: Peter Toth
> Priority: Critical
> Fix For: 2.3.3, 2.4.0
>
> Attachments: final_allDatatypes_Spark.avro, source.snappy.parquet
>
>
> When there is a duplicate column name in the current Dataframe and orginal
> Dataframe where current df is selected from, Spark in 2.3.0 and 2.3.1 does
> not resolve the column correctly when using it in the expression, hence
> causing casting issue. The same code is working in Spark 2.2.1
> Please see below code to reproduce the issue
> import org.apache.spark._
> import org.apache.spark.rdd._
> import org.apache.spark.storage.StorageLevel._
> import org.apache.spark.sql._
> import org.apache.spark.sql.DataFrame
> import org.apache.spark.sql.types._
> import org.apache.spark.sql.functions._
> import org.apache.spark.sql.catalyst.expressions._
> import org.apache.spark.sql.Column
> val v0 = spark.read.parquet("/data/home/bzinfa/bz/source.snappy.parquet")
> val v00 = v0.toDF(v0.schema.fields.indices.view.map("" + _):_*)
> val v5 = v00.select($"13".as("0"),$"14".as("1"),$"15".as("2"))
> val v5_2 = $"2"
> v5.where(lit(500).<(v5_2(new Column(new MapKeys(v5_2.expr))(lit(0)))))
> //v00's 3rdcolumn is binary and 16th is map<string, double>
> Error:
> org.apache.spark.sql.AnalysisException: cannot resolve 'map_keys(`2`)' due to
> data type mismatch: argument 1 requires map type, however, '`2`' is of binary
> type.;
>
> 'Project [0#1591, 1#1592, 2#1593] +- 'Filter (500 <
> {color:#FF0000}2#1593{color}[map_keys({color:#FF0000}2#1561{color})[0]]) +-
> Project [13#1572 AS 0#1591, 14#1573 AS 1#1592, 15#1574 AS 2#1593, 2#1561] +-
> Project [c_bytes#1527 AS 0#1559, c_union#1528 AS 1#1560, c_fixed#1529 AS
> 2#1561, c_boolean#1530 AS 3#1562, c_float#1531 AS 4#1563, c_double#1532 AS
> 5#1564, c_int#1533 AS 6#1565, c_long#1534L AS 7#1566L, c_string#1535 AS
> 8#1567, c_decimal_18_2#1536 AS 9#1568, c_decimal_28_2#1537 AS 10#1569,
> c_decimal_38_2#1538 AS 11#1570, c_date#1539 AS 12#1571, simple_struct#1540 AS
> 13#1572, simple_array#1541 AS 14#1573, simple_map#1542 AS 15#1574] +-
> Relation[c_bytes#1527,c_union#1528,c_fixed#1529,c_boolean#1530,c_float#1531,c_double#1532,c_int#1533,c_long#1534L,c_string#1535,c_decimal_18_2#1536,c_decimal_28_2#1537,c_decimal_38_2#1538,c_date#1539,simple_struct#1540,simple_array#1541,simple_map#1542]
> parquet
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