Numeric Datatype

The following Numeric types are supported:

|---------------------------------------|-------------------------------------------------------------------------------| | _integer | A 64 bit signed integer type | | _positive | A 64 bit unsigned integer type | | _float | A double-precision 64-bit IEEE 754 floating point number, restricted to finite values |

Accuracy

Xapiand handles numerical ranges by trie indexing numerical values in a special string-encoded format with variable precision.

All numerical (and also dates, times and geospatial) values are converted to lexicographic sortable string representations and indexed with different precisions. A range of values is divided recursively into multiple intervals for searching: The center of the range is searched only with the lowest possible precision in the trie, while the boundaries are matched more exactly.

Default accuracy in numeric fields is:

[ 100, 1000, 10000, 100000, 1000000, 100000000 ]

Parameters

The following parameters are accepted by Numeric fields:

|---------------------------------------|-----------------------------------------------------------------------------------------| | _accuracy | Array with the accuracies to be indexed. (Array of numeric values). | | _value | The value for the field. (Only used at index time). | | _index | The mode the field will be indexed as: "none", "field_terms", "field_values", "field_all", "field", "global_terms", "global_values", "global_all", "global", "terms", "values", "all". (The default is "field_all"). | | _slot | The slot number. (It’s calculated by default). | | _prefix | The prefix the term is going to be indexed with. (It’s calculated by default) | | _weight | The weight the term is going to be indexed with. |