[
https://issues.apache.org/jira/browse/SPARK-45414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Giuseppe Ceravolo updated SPARK-45414:
--------------------------------------
Description:
h1. Intro
Hi all! Please expect some degree of incompleteness in this issue as this is
the very first one I post, and feel free to edit it as you like - I welcome
your feedback.
My goal is to provide you with as many details and indications as I can on this
issue that I am currently facing with a Client of mine on its Production
environment (we use Azure Databricks DBR 11.3 LTS).
I was told by [Sean Owen|[srowen (Sean Owen)
(github.com)|https://github.com/srowen]], who maintains the spark-xml maven
repository on GitHub [here|[https://github.com/srowen/spark-xml],] to post an
issue here because "This code has been ported to Apache Spark now anyway so
won't be updated here" (refer to his comment [here|#issuecomment-1744792958]).]
h1. Issue
When I write a DataFrame into xml format via the spark-xml library either (1) I
get an error if empty string columns are in between non-string nested ones or
(2) if I put all string columns at the end then I get a wrong xml where the
content of string tags are misplaced into the following ones.
h1. Code to reproduce the issue
Please find below the end-to-end code snippet that results into the error
h2. CASE (1): ERROR
When empty strings are in between non-string nested ones, the write fails.
Please find attached the full trace of the error.
```py
fake_file_df = spark \
.sql(
"""SELECT
CAST(STRUCT('ItemId' AS `_Type`, '123' AS `_VALUE`) AS
STRUCT<_Type: STRING, _VALUE: STRING>) AS ItemID,
CAST(STRUCT('UPC' AS `_Type`, '123' AS `_VALUE`) AS STRUCT<_Type:
STRING, _VALUE: STRING>) AS UPC,
CAST('' AS STRING) AS _SerialNumberFlag,
CAST('MyDescription' AS STRING) AS Description,
CAST(ARRAY(STRUCT(NULL AS `_ID`, NULL AS `_Level`)) AS
ARRAY<STRUCT<_ID: STRING, _Level: STRING>>) AS MerchandiseHierarchy,
CAST(ARRAY(STRUCT(NULL AS `_ValueTypeCode`, NULL AS `_VALUE`)) AS
ARRAY<STRUCT<_ValueTypeCode: STRING, _Value: STRING>>) AS ItemPrice,
CAST('' AS STRING) AS Color,
CAST('' AS STRING) AS IntendedIndustry,
CAST(STRUCT(NULL AS `Name`) AS STRUCT<Name: STRING>) AS
Manufacturer,
CAST(STRUCT(NULL AS `Season`) AS STRUCT<Season: STRING>) AS
Marketing,
CAST(STRUCT(NULL AS `_Name`) AS STRUCT<_Name: STRING>) AS
BrandOwner,
CAST(ARRAY(STRUCT('Attribute1' AS `_Name`, 'Value1' AS `_VALUE`))
AS ARRAY<STRUCT<_Name: STRING, AttributeValue: STRING>>) AS
ItemAttribute_culinary,
CAST(ARRAY(STRUCT(NULL AS `_Name`, ARRAY(ARRAY(STRUCT(NULL AS
`AttributeCode`, NULL AS `AttributeValue`))) AS `_VALUE`)) AS
ARRAY<STRUCT<_Name: STRING, _VALUE: ARRAY<ARRAY<STRUCT<AttributeCode: STRING,
AttributeValue: STRING>>>>>) AS ItemAttribute_noculinary,
CAST(STRUCT(STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS
`Depth`, STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Height`,
STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Width`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Diameter`) AS STRUCT<Depth:
STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Height: STRUCT<_UnitOfMeasure:
STRING, _VALUE: STRING>, Width: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>,
Diameter: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>>) AS ItemMeasurements,
CAST(STRUCT('GroupA' AS `TaxGroupID`, 'CodeA' AS `TaxExemptCode`,
'1' AS `TaxAmount`) AS STRUCT<TaxGroupID: STRING, TaxExemptCode: STRING,
TaxAmount: STRING>) AS TaxInformation,
CAST('' AS STRING) AS ItemImageUrl,
CAST(ARRAY(ARRAY(STRUCT(NULL AS `_action`, NULL AS `_franchiseeId`,
NULL AS `_franchiseeName`))) AS ARRAY<ARRAY<STRUCT<_action: STRING,
_franchiseeId: STRING, _franchiseeName: STRING>>>) AS ItemFranchisees,
CAST('Add' AS STRING) AS _Action
;"""
)
# fake_file_df.display()
fake_file_df \
.coalesce(1) \
.write \
.format('com.databricks.spark.xml') \
.option('declaration', 'version="1.0" encoding="UTF-8"') \
.option("nullValue", "") \
.option('rootTag', "root_tag") \
.option('rowTag', "row_tag") \
.mode('overwrite') \
.save(xml_folder_path)
```
I noticed that it works if I try to write all columns up to "Color" (excluded),
namely:
fake_file_df \
.select( "ItemID", "UPC", "_SerialNumberFlag", "Description",
"MerchandiseHierarchy", "ItemPrice" ) \
.coalesce(1) \
.write \
.format('com.databricks.spark.xml') \
.option('declaration', 'version="1.0" encoding="UTF-8"') \
.option("nullValue", "") \
.option('rootTag', "root_tag") \
.option('rowTag', "row_tag") \
.mode('overwrite') \
.save(xml_folder_path)
h2. CASE (2): MISPLACED XML
When I put all string columns at the end of the 1-row DataFrame it mistakenly
writes the content of one column into the tag right after it.
fake_file_df = spark \
.sql( """SELECT CAST(STRUCT('ItemId' AS `_Type`, '123' AS `_VALUE`) AS
STRUCT<_Type: STRING, _VALUE: STRING>) AS ItemID, CAST(STRUCT('UPC' AS `_Type`,
'123' AS `_VALUE`) AS STRUCT<_Type: STRING, _VALUE: STRING>) AS UPC,
CAST(ARRAY(STRUCT(NULL AS `_ID`, NULL AS `_Level`)) AS ARRAY<STRUCT<_ID:
STRING, _Level: STRING>>) AS MerchandiseHierarchy, CAST(ARRAY(STRUCT(NULL AS
`_ValueTypeCode`, NULL AS `_VALUE`)) AS ARRAY<STRUCT<_ValueTypeCode: STRING,
_Value: STRING>>) AS ItemPrice, CAST(STRUCT(NULL AS `Name`) AS STRUCT<Name:
STRING>) AS Manufacturer, CAST(STRUCT(NULL AS `Season`) AS STRUCT<Season:
STRING>) AS Marketing, CAST(STRUCT(NULL AS `_Name`) AS STRUCT<_Name: STRING>)
AS BrandOwner, CAST(ARRAY(STRUCT('Attribute1' AS `_Name`, 'Value1' AS
`_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, AttributeValue: STRING>>) AS
ItemAttribute_culinary, CAST(ARRAY(STRUCT(NULL AS `_Name`,
ARRAY(ARRAY(STRUCT(NULL AS `AttributeCode`, NULL AS `AttributeValue`))) AS
`_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, _VALUE:
ARRAY<ARRAY<STRUCT<AttributeCode: STRING, AttributeValue: STRING>>>>>) AS
ItemAttribute_noculinary, CAST(STRUCT(STRUCT(NULL AS `_UnitOfMeasure`, NULL AS
`_VALUE`) AS `Depth`, STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS
`Height`, STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Width`,
STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Diameter`) AS
STRUCT<Depth: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Height:
STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Width: STRUCT<_UnitOfMeasure:
STRING, _VALUE: STRING>, Diameter: STRUCT<_UnitOfMeasure: STRING, _VALUE:
STRING>>) AS ItemMeasurements, CAST(STRUCT('GroupA' AS `TaxGroupID`, 'CodeA' AS
`TaxExemptCode`, '1' AS `TaxAmount`) AS STRUCT<TaxGroupID: STRING,
TaxExemptCode: STRING, TaxAmount: STRING>) AS TaxInformation,
CAST(ARRAY(ARRAY(STRUCT(NULL AS `_action`, NULL AS `_franchiseeId`, NULL AS
`_franchiseeName`))) AS ARRAY<ARRAY<STRUCT<_action: STRING, _franchiseeId:
STRING, _franchiseeName: STRING>>>) AS ItemFranchisees, CAST('' AS STRING) AS
_SerialNumberFlag, CAST('MyDescription' AS STRING) AS Description, CAST('' AS
STRING) AS Color, CAST('' AS STRING) AS IntendedIndustry, CAST('' AS STRING) AS
ItemImageUrl, CAST('Add' AS STRING) AS _Action ;""" )fake_file_df \
.coalesce(1) \
.write \
.format('com.databricks.spark.xml') \
.option('declaration', 'version="1.0" encoding="UTF-8"') \
.option("nullValue", "") \
.option('rootTag', "root_tag") \
.option('rowTag', "row_tag") \
.mode('overwrite') \
.save(xml_folder_path)
The output is a wrong xml where "MyDescription" is written inside the "Color"
tag instead of the "Description" tag (but if you display the "fake_file_df"
DataFrame it looks good as "MyDescription" is under the "Description" column
(see image below):).
<?xml version="1.0" encoding="UTF-8"?>
<root_tag>
<row_tag SerialNumberFlag="" Action="Add">
<ItemID Type="ItemId">123</ItemID>
<UPC Type="UPC">123</UPC>
<MerchandiseHierarchy ID="" Level=""/>
<ItemPrice ValueTypeCode="" Value=""/>
<Manufacturer>
<Name></Name>
</Manufacturer>
<Marketing>
<Season></Season>
</Marketing>
<BrandOwner Name=""/>
<ItemAttribute_culinary Name="Attribute1">
<AttributeValue>Value1</AttributeValue>
</ItemAttribute_culinary>
<ItemAttribute_noculinary Name="">
<item>
<AttributeCode></AttributeCode>
<AttributeValue></AttributeValue>
</item>
</ItemAttribute_noculinary>
<ItemMeasurements>
<Depth UnitOfMeasure=""></Depth>
<Height UnitOfMeasure=""></Height>
<Width UnitOfMeasure=""></Width>
<Diameter UnitOfMeasure=""></Diameter>
</ItemMeasurements>
<TaxInformation>
<TaxGroupID>GroupA</TaxGroupID>
<TaxExemptCode>CodeA</TaxExemptCode>
<TaxAmount>1</TaxAmount>
</TaxInformation>
<ItemFranchisees>
<item action="" franchiseeId="" franchiseeName=""/>
</ItemFranchisees>
<Description></Description>
<Color>{color:#ff0000}MyDescription{color}</Color>
<IntendedIndustry></IntendedIndustry>
<ItemImageUrl></ItemImageUrl>
</row_tag>
</root_tag>
Thanks! Giuseppe Ceravolo
was:
h1. Intro
Hi all! Please expect some degree of incompleteness in this issue as this is
the very first I post, and feel free to edit it as you like - I welcome your
feedback.
My goal is to provide you with as many details and indications as I can on this
issue that I am currently facing with a Client of mine on its Production
environment (we use Azure Databricks DBR 11.3 LTS).
I was told by [Sean Owen|[srowen (Sean Owen)
(github.com)|https://github.com/srowen]], who maintains the spark-xml maven
repository on GitHub [here|[https://github.com/srowen/spark-xml],] to post an
issue here because "This code has been ported to Apache Spark now anyway so
won't be updated here" (refer to his comment
[here|[https://github.com/databricks/spark-xml/issues/431#issuecomment-1744792958]).]
h1. Issue
When I write a DataFrame into xml format via the spark-xml library either (1) I
get an error if empty string columns are in between non-string nested ones or
(2) if I put all string columns at the end then I get a wrong xml where the
content of string tags are misplaced into the following ones.
h1. Code to reproduce the issue
Please find below the end-to-end code snippet that results into the error
h2. CASE (1): ERROR
When empty strings are in between non-string nested ones, the write fails.
Please find attached the full trace of the error.
fake_file_df = spark \
.sql( """SELECT CAST(STRUCT('ItemId' AS `_Type`, '123' AS
`_VALUE`) AS STRUCT<_Type: STRING, _VALUE: STRING>) AS ItemID,
CAST(STRUCT('UPC' AS `_Type`, '123' AS `_VALUE`) AS STRUCT<_Type: STRING,
_VALUE: STRING>) AS UPC, CAST('' AS STRING) AS _SerialNumberFlag,
CAST('MyDescription' AS STRING) AS Description,
CAST(ARRAY(STRUCT(NULL AS `_ID`, NULL AS `_Level`)) AS ARRAY<STRUCT<_ID:
STRING, _Level: STRING>>) AS MerchandiseHierarchy,
CAST(ARRAY(STRUCT(NULL AS `_ValueTypeCode`, NULL AS `_VALUE`)) AS
ARRAY<STRUCT<_ValueTypeCode: STRING, _Value: STRING>>) AS ItemPrice,
CAST('' AS STRING) AS Color, CAST('' AS STRING) AS IntendedIndustry,
CAST(STRUCT(NULL AS `Name`) AS STRUCT<Name: STRING>) AS
Manufacturer, CAST(STRUCT(NULL AS `Season`) AS STRUCT<Season:
STRING>) AS Marketing, CAST(STRUCT(NULL AS `_Name`) AS STRUCT<_Name:
STRING>) AS BrandOwner, CAST(ARRAY(STRUCT('Attribute1' AS `_Name`,
'Value1' AS `_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, AttributeValue: STRING>>)
AS ItemAttribute_culinary, CAST(ARRAY(STRUCT(NULL AS `_Name`,
ARRAY(ARRAY(STRUCT(NULL AS `AttributeCode`, NULL AS `AttributeValue`))) AS
`_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, _VALUE:
ARRAY<ARRAY<STRUCT<AttributeCode: STRING, AttributeValue: STRING>>>>>) AS
ItemAttribute_noculinary, CAST(STRUCT(STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Depth`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Height`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Width`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Diameter`) AS STRUCT<Depth:
STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Height: STRUCT<_UnitOfMeasure:
STRING, _VALUE: STRING>, Width: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>,
Diameter: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>>) AS ItemMeasurements,
CAST(STRUCT('GroupA' AS `TaxGroupID`, 'CodeA' AS `TaxExemptCode`,
'1' AS `TaxAmount`) AS STRUCT<TaxGroupID: STRING, TaxExemptCode: STRING,
TaxAmount: STRING>) AS TaxInformation, CAST('' AS STRING) AS
ItemImageUrl, CAST(ARRAY(ARRAY(STRUCT(NULL AS `_action`, NULL AS
`_franchiseeId`, NULL AS `_franchiseeName`))) AS ARRAY<ARRAY<STRUCT<_action:
STRING, _franchiseeId: STRING, _franchiseeName: STRING>>>) AS ItemFranchisees,
CAST('Add' AS STRING) AS _Action ;""" )#
fake_file_df.display()fake_file_df \
.coalesce(1) \
.write \
.format('com.databricks.spark.xml') \
.option('declaration', 'version="1.0" encoding="UTF-8"') \
.option("nullValue", "") \
.option('rootTag', "root_tag") \
.option('rowTag', "row_tag") \
.mode('overwrite') \
.save(xml_folder_path)
I noticed that it works if I try to write all columns up to "Color" (excluded),
namely:
fake_file_df \
.select( "ItemID", "UPC", "_SerialNumberFlag",
"Description", "MerchandiseHierarchy", "ItemPrice" ) \
.coalesce(1) \
.write \
.format('com.databricks.spark.xml') \
.option('declaration', 'version="1.0" encoding="UTF-8"') \
.option("nullValue", "") \
.option('rootTag', "root_tag") \
.option('rowTag', "row_tag") \
.mode('overwrite') \
.save(xml_folder_path)
h2. CASE (2): MISPLACED XML
When I put all string columns at the end of the 1-row DataFrame it mistakenly
writes the content of one column into the tag right after it.
fake_file_df = spark \
.sql( """SELECT CAST(STRUCT('ItemId' AS `_Type`, '123' AS
`_VALUE`) AS STRUCT<_Type: STRING, _VALUE: STRING>) AS ItemID,
CAST(STRUCT('UPC' AS `_Type`, '123' AS `_VALUE`) AS STRUCT<_Type: STRING,
_VALUE: STRING>) AS UPC, CAST(ARRAY(STRUCT(NULL AS `_ID`, NULL AS
`_Level`)) AS ARRAY<STRUCT<_ID: STRING, _Level: STRING>>) AS
MerchandiseHierarchy, CAST(ARRAY(STRUCT(NULL AS `_ValueTypeCode`,
NULL AS `_VALUE`)) AS ARRAY<STRUCT<_ValueTypeCode: STRING, _Value: STRING>>) AS
ItemPrice, CAST(STRUCT(NULL AS `Name`) AS STRUCT<Name: STRING>) AS
Manufacturer, CAST(STRUCT(NULL AS `Season`) AS STRUCT<Season:
STRING>) AS Marketing, CAST(STRUCT(NULL AS `_Name`) AS STRUCT<_Name:
STRING>) AS BrandOwner, CAST(ARRAY(STRUCT('Attribute1' AS `_Name`,
'Value1' AS `_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, AttributeValue: STRING>>)
AS ItemAttribute_culinary, CAST(ARRAY(STRUCT(NULL AS `_Name`,
ARRAY(ARRAY(STRUCT(NULL AS `AttributeCode`, NULL AS `AttributeValue`))) AS
`_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, _VALUE:
ARRAY<ARRAY<STRUCT<AttributeCode: STRING, AttributeValue: STRING>>>>>) AS
ItemAttribute_noculinary, CAST(STRUCT(STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Depth`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Height`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Width`, STRUCT(NULL AS
`_UnitOfMeasure`, NULL AS `_VALUE`) AS `Diameter`) AS STRUCT<Depth:
STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Height: STRUCT<_UnitOfMeasure:
STRING, _VALUE: STRING>, Width: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>,
Diameter: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>>) AS ItemMeasurements,
CAST(STRUCT('GroupA' AS `TaxGroupID`, 'CodeA' AS `TaxExemptCode`,
'1' AS `TaxAmount`) AS STRUCT<TaxGroupID: STRING, TaxExemptCode: STRING,
TaxAmount: STRING>) AS TaxInformation, CAST(ARRAY(ARRAY(STRUCT(NULL
AS `_action`, NULL AS `_franchiseeId`, NULL AS `_franchiseeName`))) AS
ARRAY<ARRAY<STRUCT<_action: STRING, _franchiseeId: STRING, _franchiseeName:
STRING>>>) AS ItemFranchisees, CAST('' AS STRING) AS
_SerialNumberFlag, CAST('MyDescription' AS STRING) AS Description,
CAST('' AS STRING) AS Color, CAST('' AS STRING) AS
IntendedIndustry, CAST('' AS STRING) AS ItemImageUrl,
CAST('Add' AS STRING) AS _Action ;""" )fake_file_df \
.coalesce(1) \
.write \
.format('com.databricks.spark.xml') \
.option('declaration', 'version="1.0" encoding="UTF-8"') \
.option("nullValue", "") \
.option('rootTag', "root_tag") \
.option('rowTag', "row_tag") \
.mode('overwrite') \
.save(xml_folder_path)
The output is a wrong xml where "MyDescription" is written inside the "Color"
tag instead of the "Description" tag (but if you display the "fake_file_df"
DataFrame it looks good as "MyDescription" is under the "Description" column
(see image below):).
<?xml version="1.0" encoding="UTF-8"?>
<root_tag>
<row_tag SerialNumberFlag="" Action="Add">
<ItemID Type="ItemId">123</ItemID>
<UPC Type="UPC">123</UPC>
<MerchandiseHierarchy ID="" Level=""/>
<ItemPrice ValueTypeCode="" Value=""/>
<Manufacturer>
<Name></Name>
</Manufacturer>
<Marketing>
<Season></Season>
</Marketing>
<BrandOwner Name=""/>
<ItemAttribute_culinary Name="Attribute1">
<AttributeValue>Value1</AttributeValue>
</ItemAttribute_culinary>
<ItemAttribute_noculinary Name="">
<item>
<AttributeCode></AttributeCode>
<AttributeValue></AttributeValue>
</item>
</ItemAttribute_noculinary>
<ItemMeasurements>
<Depth UnitOfMeasure=""></Depth>
<Height UnitOfMeasure=""></Height>
<Width UnitOfMeasure=""></Width>
<Diameter UnitOfMeasure=""></Diameter>
</ItemMeasurements>
<TaxInformation>
<TaxGroupID>GroupA</TaxGroupID>
<TaxExemptCode>CodeA</TaxExemptCode>
<TaxAmount>1</TaxAmount>
</TaxInformation>
<ItemFranchisees>
<item action="" franchiseeId="" franchiseeName=""/>
</ItemFranchisees>
<Description></Description>
<Color>{color:#FF0000}MyDescription{color}</Color>
<IntendedIndustry></IntendedIndustry>
<ItemImageUrl></ItemImageUrl>
</row_tag>
</root_tag>
Thanks! Giuseppe Ceravolo
> spark-xml misplaces string tag content
> --------------------------------------
>
> Key: SPARK-45414
> URL: https://issues.apache.org/jira/browse/SPARK-45414
> Project: Spark
> Issue Type: Bug
> Components: PySpark, Spark Core
> Affects Versions: 3.3.0
> Reporter: Giuseppe Ceravolo
> Priority: Critical
> Attachments: IllegalArgumentException.txt
>
>
> h1. Intro
> Hi all! Please expect some degree of incompleteness in this issue as this is
> the very first one I post, and feel free to edit it as you like - I welcome
> your feedback.
> My goal is to provide you with as many details and indications as I can on
> this issue that I am currently facing with a Client of mine on its Production
> environment (we use Azure Databricks DBR 11.3 LTS).
> I was told by [Sean Owen|[srowen (Sean Owen)
> (github.com)|https://github.com/srowen]], who maintains the spark-xml maven
> repository on GitHub [here|[https://github.com/srowen/spark-xml],] to post an
> issue here because "This code has been ported to Apache Spark now anyway so
> won't be updated here" (refer to his comment
> [here|#issuecomment-1744792958]).]
> h1. Issue
> When I write a DataFrame into xml format via the spark-xml library either (1)
> I get an error if empty string columns are in between non-string nested ones
> or (2) if I put all string columns at the end then I get a wrong xml where
> the content of string tags are misplaced into the following ones.
> h1. Code to reproduce the issue
> Please find below the end-to-end code snippet that results into the error
> h2. CASE (1): ERROR
> When empty strings are in between non-string nested ones, the write fails.
> Please find attached the full trace of the error.
> ```py
> fake_file_df = spark \
> .sql(
> """SELECT
> CAST(STRUCT('ItemId' AS `_Type`, '123' AS `_VALUE`) AS
> STRUCT<_Type: STRING, _VALUE: STRING>) AS ItemID,
> CAST(STRUCT('UPC' AS `_Type`, '123' AS `_VALUE`) AS STRUCT<_Type:
> STRING, _VALUE: STRING>) AS UPC,
> CAST('' AS STRING) AS _SerialNumberFlag,
> CAST('MyDescription' AS STRING) AS Description,
> CAST(ARRAY(STRUCT(NULL AS `_ID`, NULL AS `_Level`)) AS
> ARRAY<STRUCT<_ID: STRING, _Level: STRING>>) AS MerchandiseHierarchy,
> CAST(ARRAY(STRUCT(NULL AS `_ValueTypeCode`, NULL AS `_VALUE`)) AS
> ARRAY<STRUCT<_ValueTypeCode: STRING, _Value: STRING>>) AS ItemPrice,
> CAST('' AS STRING) AS Color,
> CAST('' AS STRING) AS IntendedIndustry,
> CAST(STRUCT(NULL AS `Name`) AS STRUCT<Name: STRING>) AS
> Manufacturer,
> CAST(STRUCT(NULL AS `Season`) AS STRUCT<Season: STRING>) AS
> Marketing,
> CAST(STRUCT(NULL AS `_Name`) AS STRUCT<_Name: STRING>) AS
> BrandOwner,
> CAST(ARRAY(STRUCT('Attribute1' AS `_Name`, 'Value1' AS `_VALUE`))
> AS ARRAY<STRUCT<_Name: STRING, AttributeValue: STRING>>) AS
> ItemAttribute_culinary,
> CAST(ARRAY(STRUCT(NULL AS `_Name`, ARRAY(ARRAY(STRUCT(NULL AS
> `AttributeCode`, NULL AS `AttributeValue`))) AS `_VALUE`)) AS
> ARRAY<STRUCT<_Name: STRING, _VALUE: ARRAY<ARRAY<STRUCT<AttributeCode: STRING,
> AttributeValue: STRING>>>>>) AS ItemAttribute_noculinary,
> CAST(STRUCT(STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS
> `Depth`, STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Height`,
> STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Width`, STRUCT(NULL AS
> `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Diameter`) AS STRUCT<Depth:
> STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Height:
> STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Width: STRUCT<_UnitOfMeasure:
> STRING, _VALUE: STRING>, Diameter: STRUCT<_UnitOfMeasure: STRING, _VALUE:
> STRING>>) AS ItemMeasurements,
> CAST(STRUCT('GroupA' AS `TaxGroupID`, 'CodeA' AS `TaxExemptCode`,
> '1' AS `TaxAmount`) AS STRUCT<TaxGroupID: STRING, TaxExemptCode: STRING,
> TaxAmount: STRING>) AS TaxInformation,
> CAST('' AS STRING) AS ItemImageUrl,
> CAST(ARRAY(ARRAY(STRUCT(NULL AS `_action`, NULL AS
> `_franchiseeId`, NULL AS `_franchiseeName`))) AS ARRAY<ARRAY<STRUCT<_action:
> STRING, _franchiseeId: STRING, _franchiseeName: STRING>>>) AS ItemFranchisees,
> CAST('Add' AS STRING) AS _Action
> ;"""
> )
> # fake_file_df.display()
> fake_file_df \
> .coalesce(1) \
> .write \
> .format('com.databricks.spark.xml') \
> .option('declaration', 'version="1.0" encoding="UTF-8"') \
> .option("nullValue", "") \
> .option('rootTag', "root_tag") \
> .option('rowTag', "row_tag") \
> .mode('overwrite') \
> .save(xml_folder_path)
> ```
> I noticed that it works if I try to write all columns up to "Color"
> (excluded), namely:
> fake_file_df \
> .select( "ItemID", "UPC", "_SerialNumberFlag", "Description",
> "MerchandiseHierarchy", "ItemPrice" ) \
> .coalesce(1) \
> .write \
> .format('com.databricks.spark.xml') \
> .option('declaration', 'version="1.0" encoding="UTF-8"') \
> .option("nullValue", "") \
> .option('rootTag', "root_tag") \
> .option('rowTag', "row_tag") \
> .mode('overwrite') \
> .save(xml_folder_path)
> h2. CASE (2): MISPLACED XML
> When I put all string columns at the end of the 1-row DataFrame it mistakenly
> writes the content of one column into the tag right after it.
> fake_file_df = spark \
> .sql( """SELECT CAST(STRUCT('ItemId' AS `_Type`, '123' AS `_VALUE`) AS
> STRUCT<_Type: STRING, _VALUE: STRING>) AS ItemID, CAST(STRUCT('UPC' AS
> `_Type`, '123' AS `_VALUE`) AS STRUCT<_Type: STRING, _VALUE: STRING>) AS UPC,
> CAST(ARRAY(STRUCT(NULL AS `_ID`, NULL AS `_Level`)) AS ARRAY<STRUCT<_ID:
> STRING, _Level: STRING>>) AS MerchandiseHierarchy, CAST(ARRAY(STRUCT(NULL AS
> `_ValueTypeCode`, NULL AS `_VALUE`)) AS ARRAY<STRUCT<_ValueTypeCode: STRING,
> _Value: STRING>>) AS ItemPrice, CAST(STRUCT(NULL AS `Name`) AS STRUCT<Name:
> STRING>) AS Manufacturer, CAST(STRUCT(NULL AS `Season`) AS STRUCT<Season:
> STRING>) AS Marketing, CAST(STRUCT(NULL AS `_Name`) AS STRUCT<_Name: STRING>)
> AS BrandOwner, CAST(ARRAY(STRUCT('Attribute1' AS `_Name`, 'Value1' AS
> `_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, AttributeValue: STRING>>) AS
> ItemAttribute_culinary, CAST(ARRAY(STRUCT(NULL AS `_Name`,
> ARRAY(ARRAY(STRUCT(NULL AS `AttributeCode`, NULL AS `AttributeValue`))) AS
> `_VALUE`)) AS ARRAY<STRUCT<_Name: STRING, _VALUE:
> ARRAY<ARRAY<STRUCT<AttributeCode: STRING, AttributeValue: STRING>>>>>) AS
> ItemAttribute_noculinary, CAST(STRUCT(STRUCT(NULL AS `_UnitOfMeasure`, NULL
> AS `_VALUE`) AS `Depth`, STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`)
> AS `Height`, STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Width`,
> STRUCT(NULL AS `_UnitOfMeasure`, NULL AS `_VALUE`) AS `Diameter`) AS
> STRUCT<Depth: STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Height:
> STRUCT<_UnitOfMeasure: STRING, _VALUE: STRING>, Width: STRUCT<_UnitOfMeasure:
> STRING, _VALUE: STRING>, Diameter: STRUCT<_UnitOfMeasure: STRING, _VALUE:
> STRING>>) AS ItemMeasurements, CAST(STRUCT('GroupA' AS `TaxGroupID`, 'CodeA'
> AS `TaxExemptCode`, '1' AS `TaxAmount`) AS STRUCT<TaxGroupID: STRING,
> TaxExemptCode: STRING, TaxAmount: STRING>) AS TaxInformation,
> CAST(ARRAY(ARRAY(STRUCT(NULL AS `_action`, NULL AS `_franchiseeId`, NULL AS
> `_franchiseeName`))) AS ARRAY<ARRAY<STRUCT<_action: STRING, _franchiseeId:
> STRING, _franchiseeName: STRING>>>) AS ItemFranchisees, CAST('' AS STRING) AS
> _SerialNumberFlag, CAST('MyDescription' AS STRING) AS Description, CAST('' AS
> STRING) AS Color, CAST('' AS STRING) AS IntendedIndustry, CAST('' AS STRING)
> AS ItemImageUrl, CAST('Add' AS STRING) AS _Action ;""" )fake_file_df \
> .coalesce(1) \
> .write \
> .format('com.databricks.spark.xml') \
> .option('declaration', 'version="1.0" encoding="UTF-8"') \
> .option("nullValue", "") \
> .option('rootTag', "root_tag") \
> .option('rowTag', "row_tag") \
> .mode('overwrite') \
> .save(xml_folder_path)
> The output is a wrong xml where "MyDescription" is written inside the "Color"
> tag instead of the "Description" tag (but if you display the "fake_file_df"
> DataFrame it looks good as "MyDescription" is under the "Description" column
> (see image below):).
> <?xml version="1.0" encoding="UTF-8"?>
> <root_tag>
> <row_tag SerialNumberFlag="" Action="Add">
> <ItemID Type="ItemId">123</ItemID>
> <UPC Type="UPC">123</UPC>
> <MerchandiseHierarchy ID="" Level=""/>
> <ItemPrice ValueTypeCode="" Value=""/>
> <Manufacturer>
> <Name></Name>
> </Manufacturer>
> <Marketing>
> <Season></Season>
> </Marketing>
> <BrandOwner Name=""/>
> <ItemAttribute_culinary Name="Attribute1">
> <AttributeValue>Value1</AttributeValue>
> </ItemAttribute_culinary>
> <ItemAttribute_noculinary Name="">
> <item>
> <AttributeCode></AttributeCode>
> <AttributeValue></AttributeValue>
> </item>
> </ItemAttribute_noculinary>
> <ItemMeasurements>
> <Depth UnitOfMeasure=""></Depth>
> <Height UnitOfMeasure=""></Height>
> <Width UnitOfMeasure=""></Width>
> <Diameter UnitOfMeasure=""></Diameter>
> </ItemMeasurements>
> <TaxInformation>
> <TaxGroupID>GroupA</TaxGroupID>
> <TaxExemptCode>CodeA</TaxExemptCode>
> <TaxAmount>1</TaxAmount>
> </TaxInformation>
> <ItemFranchisees>
> <item action="" franchiseeId="" franchiseeName=""/>
> </ItemFranchisees>
> <Description></Description>
> <Color>{color:#ff0000}MyDescription{color}</Color>
> <IntendedIndustry></IntendedIndustry>
> <ItemImageUrl></ItemImageUrl>
> </row_tag>
> </root_tag>
>
> Thanks! Giuseppe Ceravolo
>
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