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https://issues.apache.org/jira/browse/HAWQ-964?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shivram Mani updated HAWQ-964:
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Description:
Currently the extension framework only allows the 'AND' logical operator across
the provided predicates. Will need to support other logical operators such as
'OR' 'NOT'
Logical operators (such as AND, OR, NOT) will be denoted by the letter 'l'
Comparison operators (such as <, >, = etc) will be denoted by 'o'
Constants by 'c'
Variables (column index) by 'a'
was:
Currently the extension framework only allows the 'AND' logical operator across
the provided predicates. Will need to support other logical operators such as
'OR' 'NOT'
Logical operators (such as AND, OR, NOT) will be denoted by the letter 'l'
Comparison operators (such as <, >, = etc) will be denoted by 'o'
Constants by 'c'
Variables (column index) by 'a'
Have a separate enum for logical operators say PxfLogicalOperatorCode and
include AND,OR,NOT in it.
Other logical operators can continue existing in PxfOperatorCode enum.
Change the way Qualifier tree is handled to take care of precedence. in
pxffilters.c.
The output of this should produce a postfix notation.
> Support for additional logical operators in PXF
> -----------------------------------------------
>
> Key: HAWQ-964
> URL: https://issues.apache.org/jira/browse/HAWQ-964
> Project: Apache HAWQ
> Issue Type: Improvement
> Components: PXF
> Reporter: Shivram Mani
> Assignee: Shivram Mani
> Fix For: backlog
>
>
> Currently the extension framework only allows the 'AND' logical operator
> across the provided predicates. Will need to support other logical operators
> such as 'OR' 'NOT'
> Logical operators (such as AND, OR, NOT) will be denoted by the letter 'l'
> Comparison operators (such as <, >, = etc) will be denoted by 'o'
> Constants by 'c'
> Variables (column index) by 'a'
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