Daniel Shane created SOLR-7600:
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Summary: Many query functions will cast their operands in float
and loose precision in the process.
Key: SOLR-7600
URL: https://issues.apache.org/jira/browse/SOLR-7600
Project: Solr
Issue Type: Bug
Components: Server
Affects Versions: 4.10.3
Reporter: Daniel Shane
Priority: Minor
Function Queries like the 'max' function will cast its result to a float value
even if the source value cannot be converted to floating point without loosing
precision.
For example, the max() function will convert dates to floats, and in the
process we loose some precision (milliseconds). This is problematic if we want
to sort afterwards since we do not have a millisecond precision anymore. I do
not know if there is a work around short of creating a new set of query
functions that would take longs / dates / etc... and return the corresponding
type and name them 'long_max(), date_max() etc...'
I believe it would be more intuitive if functions like max() would return the
same type as what they got in their argument (assuming they are all of the same
type).
max(date, date) should return a date
max(long, long) should return a long
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