[
https://issues.apache.org/jira/browse/SPARK-20617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ed Lee updated SPARK-20617:
---------------------------
Description:
Hello encountered a filtering bug using 'isin' in pyspark sql on version 2.2.0,
Ubuntu 16.04.
Enclosed below an example to replicate:
import pandas as pd
test_df = pd.DataFrame({"col1": [None, None, "a", "b", "c"],
"col2": range(5)
})
test_sdf = spark.createDataFrame(test_df)
test_sdf.show()
|col1|col2|
|null| 0|
|null| 1|
| a| 2|
| b| 3|
| c| 4|
# Below shows null is considered 'isin' the list ["a"]:
test_sdf.filter(sf.col("col1").isin(["a"]) == False).show()
Or:
test_sdf.filter(~sf.col("col1").isin(["a"])).show()
*Expecting*:
|col1|col2|
|null| 0|
|null| 1|
| b| 3|
| c| 4|
*Got*:
|col1|col2|
| b| 3|
| c| 4|
My workarounds:
1. null is considered 'in', so add OR isNull conditon!
test_sdf.filter((sf.col("col1").isin(["a"])== False) | (
sf.col("col1").isNull())).show()
2. Use left join and filter
join_df = pd.DataFrame({"col1": ["a"],
"isin": 1
})
join_sdf = spark.createDataFrame(join_df)
test_sdf.join(join_sdf, on="col1", how="left") \
.filter(sf.col("isin").isNull()) \
.show()
To get:
|col1|col2|isin|
|null| 0|null|
|null| 1|null|
| c| 4|null|
| b| 3|null|
Thank you
was:
Hello encountered a filtering bug using 'isin' in pyspark sql on version 2.2.0,
Ubuntu 16.04.
Enclosed below an example to replicate:
import pandas as pd
test_df = pd.DataFrame({"col1": [None, None, "a", "b", "c"],
"col2": range(5)
})
test_sdf = spark.createDataFrame(test_df)
test_sdf.show()
|col1|col2|
|null| 0|
|null| 1|
| a| 2|
| b| 3|
| c| 4|
# Below shows null is considered 'isin' the list ["a"]:
test_sdf.filter(sf.col("col1").isin(["a"]) == False).show()
Or:
test_sdf.filter(~sf.col("col1").isin(["a"])).show()
#Expecting
|col1|col2|
|null| 0|
|null| 1|
| b| 3|
| c| 4|
# Got:
|col1|col2|
| b| 3|
| c| 4|
# My workarounds:
# 1.
# null is considered 'in', so add OR isNull conditon!
test_sdf.filter((sf.col("col1").isin(["a"])== False) | (
sf.col("col1").isNull())).show()
# 2. Use left join and filter
join_df = pd.DataFrame({"col1": ["a"],
"isin": 1
})
join_sdf = spark.createDataFrame(join_df)
test_sdf.join(join_sdf, on="col1", how="left") \
.filter(sf.col("isin").isNull()) \
.show()
|col1|col2|isin|\
|null| 0|null|
|null| 1|null|
| c| 4|null|
| b| 3|null|
Thank you
> pyspark.sql, isin when columns contain null
> --------------------------------------------
>
> Key: SPARK-20617
> URL: https://issues.apache.org/jira/browse/SPARK-20617
> Project: Spark
> Issue Type: Bug
> Components: PySpark, SQL
> Affects Versions: 2.2.0
> Environment: Ubuntu Xenial 16.04
> Reporter: Ed Lee
>
> Hello encountered a filtering bug using 'isin' in pyspark sql on version
> 2.2.0, Ubuntu 16.04.
> Enclosed below an example to replicate:
> import pandas as pd
> test_df = pd.DataFrame({"col1": [None, None, "a", "b", "c"],
> "col2": range(5)
> })
> test_sdf = spark.createDataFrame(test_df)
> test_sdf.show()
> |col1|col2|
> |null| 0|
> |null| 1|
> | a| 2|
> | b| 3|
> | c| 4|
> # Below shows null is considered 'isin' the list ["a"]:
> test_sdf.filter(sf.col("col1").isin(["a"]) == False).show()
> Or:
> test_sdf.filter(~sf.col("col1").isin(["a"])).show()
> *Expecting*:
> |col1|col2|
> |null| 0|
> |null| 1|
> | b| 3|
> | c| 4|
> *Got*:
> |col1|col2|
> | b| 3|
> | c| 4|
> My workarounds:
> 1. null is considered 'in', so add OR isNull conditon!
> test_sdf.filter((sf.col("col1").isin(["a"])== False) | (
> sf.col("col1").isNull())).show()
> 2. Use left join and filter
> join_df = pd.DataFrame({"col1": ["a"],
> "isin": 1
> })
> join_sdf = spark.createDataFrame(join_df)
> test_sdf.join(join_sdf, on="col1", how="left") \
> .filter(sf.col("isin").isNull()) \
> .show()
> To get:
> |col1|col2|isin|
> |null| 0|null|
> |null| 1|null|
> | c| 4|null|
> | b| 3|null|
> Thank you
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