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* Functions E-Z * Incorporate changes from #103686 * More functions * More functions * Update docs/reference/esql/functions/floor.asciidoc Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com> * Update docs/reference/esql/functions/left.asciidoc Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: Alexander Spies <alexander.spies@elastic.co> * Review feedback * Fix geo_shape description * Change 'colum'/'field' into 'expressions' * Review feedback * One more --------- Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com> Co-authored-by: Alexander Spies <alexander.spies@elastic.co> Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
54 lines
1.3 KiB
Text
54 lines
1.3 KiB
Text
[discrete]
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[[esql-to_double]]
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=== `TO_DOUBLE`
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*Alias*
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`TO_DBL`
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*Syntax*
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[source,esql]
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----
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TO_DOUBLE(v)
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----
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*Parameters*
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`v`::
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Input value. The input can be a single- or multi-valued column or an expression.
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*Description*
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Converts an input value to a double value.
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If the input parameter is of a date type, its value will be interpreted as
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milliseconds since the {wikipedia}/Unix_time[Unix epoch], converted to double.
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Boolean *true* will be converted to double *1.0*, *false* to *0.0*.
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*Supported types*
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The input type must be of a boolean, date, string or numeric type.
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*Example*
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[source.merge.styled,esql]
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----
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include::{esql-specs}/floats.csv-spec[tag=to_double-str]
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----
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[%header.monospaced.styled,format=dsv,separator=|]
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|===
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include::{esql-specs}/floats.csv-spec[tag=to_double-str-result]
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|===
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Note that in this example, the last conversion of the string isn't possible.
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When this happens, the result is a *null* value. In this case a _Warning_ header
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is added to the response. The header will provide information on the source of
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the failure:
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`"Line 1:115: evaluation of [TO_DOUBLE(str2)] failed, treating result as null. Only first 20 failures recorded."`
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A following header will contain the failure reason and the offending value:
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`"java.lang.NumberFormatException: For input string: \"foo\""`
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