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da5392134f
* Enforce an invariant in our dependency checker so that logical plans never have duplicate output attribute names or ids. * Fix ROW to not produce columns with duplicate names. * Fix ResolveUnionTypes to not create multiple synthetic field attributes for the same union type. * Add tests for commands using the same column name more than once. * Update docs w.r.t. how commands behave if they are used with duplicate column names.
48 lines
949 B
Text
48 lines
949 B
Text
[discrete]
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[[esql-row]]
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=== `ROW`
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The `ROW` source command produces a row with one or more columns with values
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that you specify. This can be useful for testing.
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**Syntax**
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[source,esql]
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----
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ROW column1 = value1[, ..., columnN = valueN]
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----
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*Parameters*
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`columnX`::
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The column name.
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In case of duplicate column names, only the rightmost duplicate creates a column.
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`valueX`::
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The value for the column. Can be a literal, an expression, or a
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<<esql-functions,function>>.
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*Examples*
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[source.merge.styled,esql]
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----
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include::{esql-specs}/row.csv-spec[tag=example]
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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}/row.csv-spec[tag=example-result]
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|===
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Use square brackets to create multi-value columns:
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[source,esql]
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----
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include::{esql-specs}/row.csv-spec[tag=multivalue]
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----
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`ROW` supports the use of <<esql-functions,functions>>:
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[source,esql]
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----
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include::{esql-specs}/row.csv-spec[tag=function]
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----
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