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ALTER TABLE ... WRITE ORDERED BY

Last updated: 2024-08-07 17:18:07

    Description

    Supported engine: SparkSQL
    Applicable table: External and native Iceberg tables
    Purpose: Set the sorting method data insertion into a table.

    Statement

    ALTER TABLE table_identifier
    WRITE [LOCALLY] ORDERED BY
    {col_name [ASC|DESC] [NULLS FIRST|LAST]}[, ...]

    Parameter

    table_identifier: Data table name

    Example

    ALTER TABLE dempts WRITE ORDERED BY category, id;
    -- use optional ASC/DEC keyword to specify sort order of each field (default ASC)
    ALTER TABLE dempts WRITE ORDERED BY category ASC, id DESC;
    -- use optional NULLS FIRST/NULLS LAST keyword to specify null order of each field (default FIRST)
    ALTER TABLE dempts WRITE ORDERED BY category ASC NULLS LAST, id DESC NULLS FIRST;
    -- To order within each task, not across tasks
    ALTER TABLE dempts WRITE LOCALLY ORDERED BY category, id;
    
    
    
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