Details
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New Feature
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Status: Open
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Major
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Resolution: Unresolved
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7.3.1
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None
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None
Description
It would be nice to have a reduce operation that lets you collect the values of a field from the group of tuples into an array.
Something that transforms
{
"k1": "1",
"k2": ["a", "b"]
},
{
"k1": "2",
"k2": ["c", "d"]
},
{
"k1": "2",
"k2": ["e", "f"]
}
into
{
"k1": "1",
"k2": ["a", "b"]
},
{
"k1": "2",
"k2": ["c", "d", "e", "f"]
}
and
{
"k1": "1",
"k2": "a"
},
{
"k1": "2",
"k2": "b"
},
{
"k1": "2",
"k2": "c"
}
into
{
"k1": "1",
"k2": ["a"]
},
{
"k1": "2",
"k2": ["b", "c"]
}