Changing the Column Name

Function

The ALTER TABLE ... RENAME COLUMN command is used to change the column name.

Syntax

ALTER TABLE tableName RENAME COLUMN old_columnName TO new_columnName

Parameter Description

**Table 1** RENAME COLUMN parameters
Parameter	Description
tableName	Table name.
old_columnName	Old column name.
new_columnName	New column name.

Example

ALTER TABLE table1 RENAME COLUMN a.b.c TO x

a.b.c indicates the full path of a nested column. For details about the nested column rules, see Adding a Column.

After the column name is changed, the change is automatically synchronized to the column comment. The comment is in rename oldName to newName format.

Response

You can run the DESCRIBE command to view the new column name.

Parent topic: SparkSQL Schema Evolution and Syntax Description

Previous topic: Modifying Table Properties

Next topic: Concurrency for Schema Evolution

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