[jira] [Updated] (PIG-3619) Provide XPath function
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https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Giuseppe Santoro updated PIG-3619:
--
Attachment: xpath2.patch
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Assignee: Saad Patel
Fix For: 0.13.0
Attachments: xpath.patch, xpath2.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
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[jira] [Updated] (PIG-3619) Provide XPath function
[
https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Giuseppe Santoro updated PIG-3619:
--
Attachment: xpath2.patch
I have tried to use this UDF but I get some exceptions related to the Function
Mapping definition. You define here just one parameter while there are at least
two mandatory parameters and one optional. I have fixed that issue in my new
patch xpath2.patch you can find attached to this ticket. I have been running
this UDF with hundreds of XPath queries and it works really well even with the
optional parameter.
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Assignee: Saad Patel
Fix For: 0.13.0
Attachments: xpath.patch, xpath2.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
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[jira] [Updated] (PIG-3619) Provide XPath function
[
https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Giuseppe Santoro updated PIG-3619:
--
Attachment: (was: xpath2.patch)
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Assignee: Saad Patel
Fix For: 0.13.0
Attachments: xpath.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
--
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[jira] [Updated] (PIG-3619) Provide XPath function
[
https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Cheolsoo Park updated PIG-3619:
---
Fix Version/s: 0.13.0
Updating FixVersion.
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Assignee: Saad Patel
Fix For: 0.13.0
Attachments: xpath.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
--
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[jira] [Updated] (PIG-3619) Provide XPath function
[
https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alan Gates updated PIG-3619:
Assignee: Saad Patel
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Assignee: Saad Patel
Attachments: xpath.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
--
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[jira] [Updated] (PIG-3619) Provide XPath function
[
https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Saad Patel updated PIG-3619:
Attachment: xpath.patch
The XPath UDF and XPathTest are both included. Usage is also included in
javadocs
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Attachments: xpath.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
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[jira] [Updated] (PIG-3619) Provide XPath function
[
https://issues.apache.org/jira/browse/PIG-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Saad Patel updated PIG-3619:
Description:
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records. XPath
would allow those extractions to be done very easily. I'm proposing a patch
that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
was:
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records. XPath
would allow those extractions to be done very easily. I'm proposing a patch
that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
Provide XPath function
--
Key: PIG-3619
URL: https://issues.apache.org/jira/browse/PIG-3619
Project: Pig
Issue Type: Improvement
Components: piggybank
Reporter: Saad Patel
Attachments: xpath.patch
Xml is often loaded using XMLLoader with a record boundary tag as one of the
parameters. A common use case is to then extract data from those records.
XPath would allow those extractions to be done very easily. I'm proposing a
patch that adds simple XPath support as a UDF.
Example usage of this the XPath UDF would be:
{code}
extractions = FOREACH xmlrecords GENERATE XPath(record, 'book/author'),
XPath(record, 'book/title');
{code}
The proposed UDF also caches the last xml document. This is helpful for
improving performance when multiple consecutive xpath extractions on the same
xml document, such as the example above.
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