LogoLogo
OverviewQuickstartsHow To GuidesReferenceArticlesSupport
Reference
Reference
  • Reference
  • ✨Learning Paths
    • Amazon Kinesis
    • Amazon S3
    • Apache Kafka
    • Confluent Cloud
    • Microsoft SQL Server
    • MongoDB
    • MySQL
    • PostgreSQL
  • SQL COMMANDS
    • Clusters
      • CREATE CLUSTER
      • ALTER CLUSTER
      • ROLL CLUSTER
      • STOP/START CLUSTER
      • DROP CLUSTER
    • Connections
      • CREATE CONNECTION
        • Amazon Kinesis
        • Amazon Redshift
        • Amazon S3
        • Apache Kafka
        • AWS Glue Data Catalog
        • ClickHouse
        • Confluent Cloud
        • Elasticsearch
        • Hive Metastore
        • Microsoft SQL Server
        • MongoDB
        • MySQL
        • Polaris Catalog
        • Iceberg REST catalogs
        • PostgreSQL
        • Snowflake
      • ALTER CONNECTION
      • DROP CONNECTION
      • CDC Connections with SSL
    • Jobs
      • CREATE JOB
        • Ingestion
          • Amazon Kinesis
          • Amazon S3
          • Apache Kafka
          • Confluent Kafka
          • Content Types
          • Microsoft SQL Server
          • MongoDB
          • MySQL
          • PostgreSQL
        • Replication
          • Microsoft SQL Server
          • MongoDB
          • MySQL
          • PostgreSQL
        • Transformation
          • INSERT
            • MAP_COLUMNS_BY_NAME
            • UNNEST
          • MERGE
          • SELECT
          • Job Options
            • Amazon Redshift
            • Amazon S3
            • Apache Iceberg
            • ClickHouse
            • Data Lake Tables
            • Elasticsearch
            • PostgreSQL
            • Snowflake
        • Monitoring
          • Amazon CloudWatch
          • Datadog
          • Dynatrace
      • ALTER JOB
      • PAUSE / RESUME JOB
      • DROP JOB
    • Materialized Views
      • CREATE MATERIALIZED VIEW
      • ALTER MATERIALIZED VIEW
      • DROP MATERIALIZED VIEW
      • Join with a Materialized View
    • Tables
      • CREATE TABLE
      • ALTER TABLE
      • DROP TABLE
    • Iceberg Tables
      • Upsolver Managed Tables
        • CREATE ICEBERG TABLE
        • ALTER ICEBERG TABLE
        • DROP ICEBERG TABLE
        • OPTIMIZE ICEBERG TABLE
      • External Iceberg Tables
        • CREATE EXTERNAL ICEBERG TABLE
        • DROP EXTERNAL ICEBERG TABLE
      • Mirror Iceberg Tables
        • CREATE MIRROR
        • ALTER MIRROR
        • PAUSE / RESUME MIRROR
        • DROP MIRROR
  • FUNCTIONS & OPERATORS
    • Data Types
    • Functions
      • Aggregate
        • APPROX_COUNT_DISTINCT
        • APPROX_COUNT_DISTINCT_EACH
        • AVG
        • AVG_EACH
        • AVG_TIME_SERIES
        • COLLECT_SET
        • COLLECT_SET_EACH
        • COUNT
        • COUNT(*)
        • COUNT(DISTINCT ...)
        • COUNT_EACH
        • COUNT_IF
        • DYNAMIC_SESSIONS
        • FIRST
        • FIRST_ARRAY
        • FIRST_EACH
        • FIRST_TIME_SERIES
        • LAST
        • LAST_ARRAY
        • LAST_EACH
        • LAST_K
        • LAST_K_EACH
        • LAST_TIME_SERIES
        • MAX
        • MAX_BY
        • MAX_EACH
        • MAX_TIME_SERIES
        • MIN
        • MIN_BY
        • MIN_EACH
        • MIN_TIME_SERIES
        • SESSION_COUNT
        • STD_DEV
        • STD_DEV_EACH
        • STRING_MAX
        • STRING_MAX_EACH
        • STRING_MIN_EACH
        • SUM
        • SUM_EACH
        • SUM_TIME_SERIES
        • WEIGHTED_AVERAGE
      • Array
        • ARRAY_DISTINCT
        • ARRAY_JOIN
        • ARRAY_MAX
        • ARRAY_MIN
        • ARRAY_SORT
        • ARRAY_SORT_DESC
        • ARRAY_SUM
        • COUNT_VALUES_IF
        • COUNT_VALUES
        • ELEMENT_AT
        • FIRST_ELEMENT
        • LAST_ELEMENT
        • VALUE_INDEX_IN_ARRAY
        • VALUE_INDEX_IN_ROW
      • Comparison
        • GREATEST
        • LEAST
      • Conditional
        • COALESCE
        • IF_ELSE
        • NULL_IF
      • Date & Time
        • ADD_TIME_ZONE_OFFSET
        • DATE
        • DATE_ADD
        • DATE_DIFF
        • DATE_TRUNC
        • DAY
        • DAY_OF_WEEK
        • DAY_OF_YEAR
        • EXTRACT_TIMESTAMP
        • EXTRACT
        • FORMAT_DATETIME
        • FROM_ISO8601_DATE
        • FROM_UNIXTIME
        • HOUR
        • MILLISECOND
        • MINUTE
        • MONTH
        • QUARTER
        • RUN_END_TIME
        • RUN_START_TIME
        • SECOND
        • SUBTRACT_TIME_ZONE_OFFSET
        • TO_UNIX_EPOCH_MILLIS
        • TO_UNIX_EPOCH_SECONDS
        • TO_UNIXTIME
        • WEEK
        • YEAR_OF_WEEK
        • YEAR
      • Filter
        • IS_DUPLICATE
        • NOT
      • Interval
        • PARSE_DURATION
      • Mathematical
        • ABS
        • CBRT
        • CEIL
        • CEILING
        • DEGREES
        • EXP
        • FLOOR
        • GET_SHARD_NUMBER
        • LN
        • LOG
        • LOG2
        • LOG10
        • MOD
        • MODULO
        • POW
        • POWER
        • RADIANS
        • RAND
        • RANDOM
        • RECIPROCAL
        • ROUND
        • SIGN
        • SORT_VALUES
        • SQRT
        • TRUNCATE
      • Regular Expressions
        • REGEXP_EXTRACT
        • REGEXP_EXTRACT_ALL
        • REGEXP_LIKE
        • REGEX_MATCH_POSITION
        • REGEX_NAMED_GROUPS
        • REGEXP_REPLACE
      • Spatial
        • ST_DISTANCE
        • ST_WGS84_DISTANCE
        • WKT_SPATIAL_CONTAINS
        • WKT_SPATIAL_INTERSECT
      • String
        • BASE64_DECODE
        • BASE64_TO_HEX
        • BYTES_SUBSTRING
        • CONCAT
        • DATE
        • JOIN_ARRAYS
        • LENGTH
        • LOWER
        • LPAD
        • LTRIM
        • MD5
        • PARSE_DATETIME
        • REPLACE
        • REVERSE
        • RPAD
        • RTRIM
        • SHA1
        • SHA3_512
        • SHA256
        • SHA512
        • SORT_VALUES
        • SPLIT
        • SPLIT_TO_RECORD
        • STRING_FORMAT
        • STRIP_MARGIN
        • STRIP_PREFIX
        • STRIP_SUFFIX
        • STRPOS
        • SUBSTR
        • SUBSTRING
        • TRANSLATE
        • TRIM_CHARS
        • TRIM
        • UPPER
        • UUID_GENERATOR
        • XX_HASH
      • Structural
        • FROM_KEY_VALUE
        • GET_RANGE
        • JOIN_ALL_BY_KEY
        • JSON_PATH
        • JSON_TO_RECORD
        • MAP_WITH_INDEX
        • QUERY_STRING_TO_RECORD
        • RECORD_TO_JSON
        • SORT_BY
        • TO_ARRAY
        • ZIP_WITH_INDEX
        • ZIP
      • Trigonometric
        • COS
        • SIN
        • TAN
        • TANH
      • Type Conversion
        • CAST
        • CHR
        • DECIMAL_TO_HEX
        • HEX_TO_DECIMAL
        • TO_BIGINT
        • TO_DOUBLE
        • TO_STRING
      • URL
        • TOP_PRIVATE_DOMAIN
        • URL_DECODE
        • URL_ENCODE
        • URL_PARSER
    • Operators
      • Comparison
      • Conditional
        • CASE
      • Logical
      • Mathematical
      • String
  • MONITORING
    • Clusters
    • Datasets
      • Ingested Data
        • Column
      • Lineage
      • Data Violations
      • Statistics
      • Maintenance
        • Compactions
        • Expire Snapshots
        • Orphan Files
      • Columns
      • Partitions
      • Properties
    • Job Status
      • Stream & File Sources
        • Monitoring
        • Graphs
        • Lineage
        • Settings
      • CDC Sources
        • Monitoring
        • Replication Settings
        • Job Settings
    • System Catalog
      • Information Schema
        • Clusters
        • Columns
        • Connections
        • Jobs
        • Mirrors
        • Tables
        • Users
        • Views
      • Insights
        • job_output_column_stats
        • dataset_column_stats
      • Monitoring
        • CDC Status
        • Clusters
        • Expectations
        • Jobs
        • Partition Statistics
        • Recent Compactions
        • Running Queries
        • Table Statistics
      • Task Executions Table
  • GENERAL
    • Common SQL Syntax
    • View Entity Syntax
    • Keyboard Shortcuts
Powered by GitBook
On this page
  • Syntax
  • Changing table options
  • Partitioning/Clustering
  • Sorting evolution
  • Examples
  1. SQL COMMANDS
  2. Iceberg Tables
  3. Upsolver Managed Tables

ALTER ICEBERG TABLE

Last updated 7 months ago

Syntax

Changing table options

Alters previously configured options for the specified Apache Iceberg table:

ALTER ICEBERG TABLE <table_identifier> 
    SET <table_option> = <value>;

Partitioning/Clustering

Users can change the partition or cluster columns of an existing table. Additionally, you can switch from partitioning to clustering and vice versa, with these changes applying to data moving forward.

Changing columns

Changes the partition/cluster columns of an existing table. This change does not rebuild the existing data according to the new partitioning, but will apply the new partitioning to data moving forward.

Partitioned table example:

ALTER TABLE <table_name> PARTITION BY <column_name> [, ...];

Clustered table example:

ALTER TABLE <table_name> CLUSTER BY <column_name> [, ...];

Note you can use any  supported by iceberg. for example:

ALTER TABLE <table_name> PARTITION BY
  TRUNCATE(10, <column_name>),
  DAY(<timestamp_column_name>);

Stop partitioning\clustering

To stop table partitioning or clustering moving forward:

ALTER TABLE <table_name> PARTITION BY ();

Switching Between Partitioning and Clustering

You can also change the table structure from clustering to partitioning and vice versa, which will apply to data moving forward.

Sorting evolution

Changes the sorting columns of an existing table.

This will affect the data written from now onwards and new compactions will write data using the new sorting.

ALTER TABLE <table_name> ORDER BY <column_name> [ASC | DESC] [, ...]

To disable sorting completely:

ALTER TABLE <table_name> ORDER BY ()

Examples

Modifying table options:

ALTER ICEBERG TABLE my_iceberg_table
SET compute_cluster = "my_compute_cluster",
iceberg.read.split."planning-lookback"='10';

Changing partitions columns:

ALTER ICEBERG TABLE my_iceberg_table PARTITION BY COLUMN1, COLUMNS2;

Changing Sort columns:

ALTER ICEBERG TABLE my_iceberg_table ORDER BY COLUMN1 DESC, COLUMNS2 ASC;

Note that not all table options are mutable.

All mutable options are denoted by — editable in the individual option descriptions.

If you wishes to re-sort old data after changing the sorting, you can trigger a compaction with command.

To check if a certain table option is mutable, see .

partition transforms
OPTIMIZE TABLE
CREATE ICEBERG TABLE