Reference
Version · 6.0
Change Automation Reference

Alter Standard Table - Data Metrics

Last updated: August 12, 2026

Modifies data metric configurations including schedule and metric functions.

Known limitations:

This change type does not support automatic rollback.
Snowflake snapshots created with Liquibase Secure 5.1 are incompatible with earlier versions due to enhanced object type detection for TABLES and VIEWS. Regenerate all snapshots with 5.1 after upgrading to avoid false differences in diff and diff-changelog operations.

Available attributes

Attribute	Type	Description	Required
`catalogName`	String	Name of the catalog (database) containing the table	No
`schemaName`	String	Name of the schema containing the table	No
`tableName`	String	Name of the table to alter	Yes
`ifExists`	Boolean	Only execute if the table exists	No

Data metric schedule

Controls when data metrics are calculated.

alterDataMetricSchedule nested attributes

Attribute	Type	Description	Required
`newSchedule`	String	New schedule expression	No*
`unsetSchedule`	Boolean	If true, unsets the schedule	No*

*Exactly one of newSchedule or unsetSchedule must be specified.

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:pro-snowflake="http://www.liquibase.org/xml/ns/pro-snowflake"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/pro-snowflake
        http://www.liquibase.org/xml/ns/pro-snowflake/liquibase-pro-snowflake-latest.xsd">

    <!-- Set data metric schedule -->
    <changeSet id="set-data-metric-schedule" author="examples">
        <pro-snowflake:alterStandardTable tableName="MONITORED_TABLE">
            <pro-snowflake:alterDataMetricSchedule newSchedule="USING CRON 0 9 * * * UTC"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

    <!-- Unset data metric schedule -->
    <changeSet id="unset-data-metric-schedule" author="examples">
        <pro-snowflake:alterStandardTable tableName="MONITORED_TABLE">
            <pro-snowflake:alterDataMetricSchedule unsetSchedule="true"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

</databaseChangeLog>

{
  "databaseChangeLog": [
    {
      "changeSet": {
        "id": "set-data-metric-schedule",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "MONITORED_TABLE",
              "alterDataMetricSchedule": {
                "newSchedule": "USING CRON 0 9 * * * UTC"
              }
            }
          }
        ]
      }
    },
    {
      "changeSet": {
        "id": "unset-data-metric-schedule",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "MONITORED_TABLE",
              "alterDataMetricSchedule": {
                "unsetSchedule": true
              }
            }
          }
        ]
      }
    }
  ]
}

databaseChangeLog:
  # Set data metric schedule
  - changeSet:
      id: set-data-metric-schedule
      author: examples
      changes:
        - alterStandardTable:
            tableName: MONITORED_TABLE
            alterDataMetricSchedule:
              newSchedule: "USING CRON 0 9 * * * UTC"

  # Unset data metric schedule
  - changeSet:
      id: unset-data-metric-schedule
      author: examples
      changes:
        - alterStandardTable:
            tableName: MONITORED_TABLE
            alterDataMetricSchedule:
              unsetSchedule: true

--liquibase formatted sql

--changeset examples:set-data-metric-schedule
-- Set data metric schedule
ALTER TABLE MYDB.PUBLIC.MONITORED_TABLE SET DATA_METRIC_SCHEDULE = 'USING CRON 0 9 * * * UTC';

--changeset examples:unset-data-metric-schedule
-- Unset data metric schedule
ALTER TABLE MYDB.PUBLIC.MONITORED_TABLE UNSET DATA_METRIC_SCHEDULE;

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:pro-snowflake="http://www.liquibase.org/xml/ns/pro-snowflake"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/pro-snowflake
        http://www.liquibase.org/xml/ns/pro-snowflake/liquibase-pro-snowflake-latest.xsd">

    <!-- Set data metric schedule -->
    <changeSet id="set-data-metric-schedule" author="examples">
        <pro-snowflake:alterStandardTable tableName="MONITORED_TABLE">
            <pro-snowflake:alterDataMetricSchedule newSchedule="USING CRON 0 9 * * * UTC"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

    <!-- Unset data metric schedule -->
    <changeSet id="unset-data-metric-schedule" author="examples">
        <pro-snowflake:alterStandardTable tableName="MONITORED_TABLE">
            <pro-snowflake:alterDataMetricSchedule unsetSchedule="true"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

</databaseChangeLog>

{
  "databaseChangeLog": [
    {
      "changeSet": {
        "id": "set-data-metric-schedule",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "MONITORED_TABLE",
              "alterDataMetricSchedule": {
                "newSchedule": "USING CRON 0 9 * * * UTC"
              }
            }
          }
        ]
      }
    },
    {
      "changeSet": {
        "id": "unset-data-metric-schedule",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "MONITORED_TABLE",
              "alterDataMetricSchedule": {
                "unsetSchedule": true
              }
            }
          }
        ]
      }
    }
  ]
}

databaseChangeLog:
  # Set data metric schedule
  - changeSet:
      id: set-data-metric-schedule
      author: examples
      changes:
        - alterStandardTable:
            tableName: MONITORED_TABLE
            alterDataMetricSchedule:
              newSchedule: "USING CRON 0 9 * * * UTC"

  # Unset data metric schedule
  - changeSet:
      id: unset-data-metric-schedule
      author: examples
      changes:
        - alterStandardTable:
            tableName: MONITORED_TABLE
            alterDataMetricSchedule:
              unsetSchedule: true

--liquibase formatted sql

--changeset examples:set-data-metric-schedule
-- Set data metric schedule
ALTER TABLE MYDB.PUBLIC.MONITORED_TABLE SET DATA_METRIC_SCHEDULE = 'USING CRON 0 9 * * * UTC';

--changeset examples:unset-data-metric-schedule
-- Unset data metric schedule
ALTER TABLE MYDB.PUBLIC.MONITORED_TABLE UNSET DATA_METRIC_SCHEDULE;

Data metric functions

Adds, modifies, or drops data metric functions.

alterDataMetricFunction nested attributes

Attribute	Type	Description	Required
`metricCatalog`	String	Catalog containing the metric function	No
`metricSchema`	String	Schema containing the metric function	No
`metricName`	String	Name of the metric function	Yes
`on`	String	Column(s) the metric applies to	No
`action`	String	Action to perform: `ADD`, `MODIFY`, `DROP`	Yes
`modifyExpression`	String	New expression for MODIFY action	No
`executeAsRole`	String	Role to execute as	No

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:pro-snowflake="http://www.liquibase.org/xml/ns/pro-snowflake"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/pro-snowflake
        http://www.liquibase.org/xml/ns/pro-snowflake/liquibase-pro-snowflake-latest.xsd">

    <!-- Add data metric function -->
    <changeSet id="add-data-metric-function" author="examples">
        <pro-snowflake:alterStandardTable tableName="QUALITY_MONITORED">
            <pro-snowflake:alterDataMetricFunction
                metricSchema="METRICS"
                metricName="CHECK_COMPLETENESS"
                on="EMAIL, PHONE"
                action="ADD"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

    <!-- Modify data metric function -->
    <changeSet id="modify-data-metric-function" author="examples">
        <pro-snowflake:alterStandardTable tableName="QUALITY_MONITORED">
            <pro-snowflake:alterDataMetricFunction
                metricSchema="METRICS"
                metricName="CHECK_COMPLETENESS"
                on="EMAIL, PHONE, ADDRESS"
                action="MODIFY"
                modifyExpression="COUNT(*) WHERE EMAIL IS NOT NULL AND PHONE IS NOT NULL AND ADDRESS IS NOT NULL"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

    <!-- Drop data metric function -->
    <changeSet id="drop-data-metric-function" author="examples">
        <pro-snowflake:alterStandardTable tableName="QUALITY_MONITORED">
            <pro-snowflake:alterDataMetricFunction
                metricSchema="METRICS"
                metricName="CHECK_COMPLETENESS"
                action="DROP"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

</databaseChangeLog>

{
  "databaseChangeLog": [
    {
      "changeSet": {
        "id": "add-data-metric-function",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "QUALITY_MONITORED",
              "alterDataMetricFunction": {
                "metricSchema": "METRICS",
                "metricName": "CHECK_COMPLETENESS",
                "on": "EMAIL, PHONE",
                "action": "ADD"
              }
            }
          }
        ]
      }
    },
    {
      "changeSet": {
        "id": "modify-data-metric-function",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "QUALITY_MONITORED",
              "alterDataMetricFunction": {
                "metricSchema": "METRICS",
                "metricName": "CHECK_COMPLETENESS",
                "on": "EMAIL, PHONE, ADDRESS",
                "action": "MODIFY",
                "modifyExpression": "COUNT(*) WHERE EMAIL IS NOT NULL AND PHONE IS NOT NULL AND ADDRESS IS NOT NULL"
              }
            }
          }
        ]
      }
    },
    {
      "changeSet": {
        "id": "drop-data-metric-function",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "QUALITY_MONITORED",
              "alterDataMetricFunction": {
                "metricSchema": "METRICS",
                "metricName": "CHECK_COMPLETENESS",
                "action": "DROP"
              }
            }
          }
        ]
      }
    }
  ]
}

databaseChangeLog:
  # Add data metric function
  - changeSet:
      id: add-data-metric-function
      author: examples
      changes:
        - alterStandardTable:
            tableName: QUALITY_MONITORED
            alterDataMetricFunction:
              metricSchema: METRICS
              metricName: CHECK_COMPLETENESS
              on: "EMAIL, PHONE"
              action: ADD

  # Modify data metric function
  - changeSet:
      id: modify-data-metric-function
      author: examples
      changes:
        - alterStandardTable:
            tableName: QUALITY_MONITORED
            alterDataMetricFunction:
              metricSchema: METRICS
              metricName: CHECK_COMPLETENESS
              on: "EMAIL, PHONE, ADDRESS"
              action: MODIFY
              modifyExpression: "COUNT(*) WHERE EMAIL IS NOT NULL AND PHONE IS NOT NULL AND ADDRESS IS NOT NULL"

  # Drop data metric function
  - changeSet:
      id: drop-data-metric-function
      author: examples
      changes:
        - alterStandardTable:
            tableName: QUALITY_MONITORED
            alterDataMetricFunction:
              metricSchema: METRICS
              metricName: CHECK_COMPLETENESS
              action: DROP

-- Add data metric function
ALTER TABLE MYDB.PUBLIC.QUALITY_MONITORED
  ADD DATA METRIC FUNCTION METRICS.CHECK_COMPLETENESS ON (EMAIL, PHONE);

-- Drop data metric function
ALTER TABLE MYDB.PUBLIC.QUALITY_MONITORED
  DROP DATA METRIC FUNCTION METRICS.CHECK_COMPLETENESS;

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:pro-snowflake="http://www.liquibase.org/xml/ns/pro-snowflake"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/pro-snowflake
        http://www.liquibase.org/xml/ns/pro-snowflake/liquibase-pro-snowflake-latest.xsd">

    <!-- Add data metric function -->
    <changeSet id="add-data-metric-function" author="examples">
        <pro-snowflake:alterStandardTable tableName="QUALITY_MONITORED">
            <pro-snowflake:alterDataMetricFunction
                metricSchema="METRICS"
                metricName="CHECK_COMPLETENESS"
                on="EMAIL, PHONE"
                action="ADD"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

    <!-- Modify data metric function -->
    <changeSet id="modify-data-metric-function" author="examples">
        <pro-snowflake:alterStandardTable tableName="QUALITY_MONITORED">
            <pro-snowflake:alterDataMetricFunction
                metricSchema="METRICS"
                metricName="CHECK_COMPLETENESS"
                on="EMAIL, PHONE, ADDRESS"
                action="MODIFY"
                modifyExpression="COUNT(*) WHERE EMAIL IS NOT NULL AND PHONE IS NOT NULL AND ADDRESS IS NOT NULL"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

    <!-- Drop data metric function -->
    <changeSet id="drop-data-metric-function" author="examples">
        <pro-snowflake:alterStandardTable tableName="QUALITY_MONITORED">
            <pro-snowflake:alterDataMetricFunction
                metricSchema="METRICS"
                metricName="CHECK_COMPLETENESS"
                action="DROP"/>
        </pro-snowflake:alterStandardTable>
    </changeSet>

</databaseChangeLog>

{
  "databaseChangeLog": [
    {
      "changeSet": {
        "id": "add-data-metric-function",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "QUALITY_MONITORED",
              "alterDataMetricFunction": {
                "metricSchema": "METRICS",
                "metricName": "CHECK_COMPLETENESS",
                "on": "EMAIL, PHONE",
                "action": "ADD"
              }
            }
          }
        ]
      }
    },
    {
      "changeSet": {
        "id": "modify-data-metric-function",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "QUALITY_MONITORED",
              "alterDataMetricFunction": {
                "metricSchema": "METRICS",
                "metricName": "CHECK_COMPLETENESS",
                "on": "EMAIL, PHONE, ADDRESS",
                "action": "MODIFY",
                "modifyExpression": "COUNT(*) WHERE EMAIL IS NOT NULL AND PHONE IS NOT NULL AND ADDRESS IS NOT NULL"
              }
            }
          }
        ]
      }
    },
    {
      "changeSet": {
        "id": "drop-data-metric-function",
        "author": "examples",
        "changes": [
          {
            "alterStandardTable": {
              "tableName": "QUALITY_MONITORED",
              "alterDataMetricFunction": {
                "metricSchema": "METRICS",
                "metricName": "CHECK_COMPLETENESS",
                "action": "DROP"
              }
            }
          }
        ]
      }
    }
  ]
}

databaseChangeLog:
  # Add data metric function
  - changeSet:
      id: add-data-metric-function
      author: examples
      changes:
        - alterStandardTable:
            tableName: QUALITY_MONITORED
            alterDataMetricFunction:
              metricSchema: METRICS
              metricName: CHECK_COMPLETENESS
              on: "EMAIL, PHONE"
              action: ADD

  # Modify data metric function
  - changeSet:
      id: modify-data-metric-function
      author: examples
      changes:
        - alterStandardTable:
            tableName: QUALITY_MONITORED
            alterDataMetricFunction:
              metricSchema: METRICS
              metricName: CHECK_COMPLETENESS
              on: "EMAIL, PHONE, ADDRESS"
              action: MODIFY
              modifyExpression: "COUNT(*) WHERE EMAIL IS NOT NULL AND PHONE IS NOT NULL AND ADDRESS IS NOT NULL"

  # Drop data metric function
  - changeSet:
      id: drop-data-metric-function
      author: examples
      changes:
        - alterStandardTable:
            tableName: QUALITY_MONITORED
            alterDataMetricFunction:
              metricSchema: METRICS
              metricName: CHECK_COMPLETENESS
              action: DROP

-- Add data metric function
ALTER TABLE MYDB.PUBLIC.QUALITY_MONITORED
  ADD DATA METRIC FUNCTION METRICS.CHECK_COMPLETENESS ON (EMAIL, PHONE);

-- Drop data metric function
ALTER TABLE MYDB.PUBLIC.QUALITY_MONITORED
  DROP DATA METRIC FUNCTION METRICS.CHECK_COMPLETENESS;

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Alter Standard Table - Data Metrics

Available attributes

Data metric schedule

alterDataMetricSchedule nested attributes

XML

JSON

YAML

SQL

Data metric functions

alterDataMetricFunction nested attributes

XML

JSON

YAML

SQL

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alterStandardTable overview

Snowflake: ALTER TABLE