Hi All,
I have a scenario like In elastic search i want to create custom
mapping.The data will be insert into index using java API . Now i have a
field with multi values like "1,2,3" .Field name is categories. can you
please tell me how to create a custom mapping for type array so that when i
insert data in to elastic search index the categories type is need to be an
string array which can hold multi values.(string array).
catgories : [
"1",
"2",
"3"
]
I used river bracket notation to dynamically create array at
elastic search using bracket notation.but from java API how can we create
custom mapping so that it can hold multi values.
Thanks
phani
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There is nothing special you need to add to your mapping to enable multiple
values for a field. Just pass in an array of values instead of a single
value, and all of the values are analyzed.
One thing you might want to add for string fields with multiple values:
"position_offset_gap" : n
When a string field is analyzed, it typically assigns a position to each
token that is one greater than the position of the previous token. By
setting a position offset gap value to n, it skips ahead that many
positions, representing the number of non-matching word positions between
consecutive values.
What this does is that if your field contains multiple values that each has
multiple words, a phrase query won't span across values unless the slop
value is large enough (n or larger, I seem to recall).
Hope this helps.
Brian
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