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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.
42 lines
907 B
Text
42 lines
907 B
Text
[discrete]
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[[esql-rename]]
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=== `RENAME`
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The `RENAME` processing command renames one or more columns.
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**Syntax**
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[source,esql]
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----
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RENAME old_name1 AS new_name1[, ..., old_nameN AS new_nameN]
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----
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*Parameters*
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`old_nameX`::
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The name of a column you want to rename.
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`new_nameX`::
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The new name of the column. If it conflicts with an existing column name,
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the existing column is dropped. If multiple columns are renamed to the same
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name, all but the rightmost column with the same new name are dropped.
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*Description*
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The `RENAME` processing command renames one or more columns. If a column with
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the new name already exists, it will be replaced by the new column.
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*Examples*
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[source,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=rename]
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----
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Multiple columns can be renamed with a single `RENAME` command:
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[source,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=renameMultipleColumns]
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----
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