SQL DDL documentation by ahmedabu98 · Pull Request #37539 · apache/beam

ahmedabu98 · 2026-02-06T21:44:06Z

Adding some SQL DDL documentation to the Beam website.

Specifically the following commands for Catalogs, Databases, Tables:

CREATE
DROP
USE
SHOW
ALTER

…erg_getting_started

gemini-code-assist · 2026-02-06T21:44:30Z

Summary of Changes

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This pull request significantly enhances the Apache Beam website by introducing extensive documentation for SQL Data Definition Language (DDL) commands, making it easier for users to understand and utilize SQL for managing Catalogs, Databases, and Tables. Concurrently, it refines the Iceberg SQL connector's ability to handle table properties, including a new convention for Beam-specific configurations, and updates existing documentation to reflect these capabilities and new table types.

Highlights

New SQL DDL Documentation: Comprehensive documentation has been added for Beam SQL Data Definition Language (DDL) commands, covering CREATE, DROP, USE, SHOW, and ALTER statements for Catalogs, Databases, and Tables.
Iceberg Connector Enhancements: The Iceberg SQL connector has been updated to support passing table properties during table creation and to correctly parse Beam-specific properties (prefixed with 'beam.write.' and 'beam.read.').
Website Navigation Update: The Beam website's navigation menu has been updated to include a new 'DDL' section under Beam SQL, providing easy access to the newly added documentation.
Expanded CREATE EXTERNAL TABLE Documentation: The documentation for CREATE EXTERNAL TABLE now includes detailed sections for Iceberg and DataGen table types, explaining their syntax, properties, and usage.

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Changelog

sdks/java/extensions/sql/iceberg/src/main/java/org/apache/beam/sdk/extensions/sql/meta/provider/iceberg/IcebergMetastore.java
- Added imports for Collectors and TypeReference.
- Modified createTable method to accept and process a Map<String, String> properties argument, filtering out Beam-specific properties before passing them to the Iceberg catalog.
sdks/java/extensions/sql/iceberg/src/main/java/org/apache/beam/sdk/extensions/sql/meta/provider/iceberg/IcebergTable.java
- Added import for JsonNode and defined constants for BEAM_WRITE_PROPERTY and BEAM_READ_PROPERTY.
- Refactored the constructor to iterate through table properties, identify Beam-specific properties (e.g., beam.write.triggering_frequency_seconds), and throw exceptions for unknown Beam properties.
sdks/java/extensions/sql/iceberg/src/test/java/org/apache/beam/sdk/extensions/sql/meta/provider/iceberg/PubsubToIcebergIT.java
- Updated TBLPROPERTIES in test cases to use the new beam.write.triggering_frequency_seconds prefix for triggering_frequency_seconds.
sdks/java/io/iceberg/src/main/java/org/apache/beam/sdk/io/iceberg/IcebergCatalogConfig.java
- Modified createTable method signature to include a Map<String, String> properties argument.
- Passed the new properties argument to the underlying Iceberg catalog().createTable call.
website/www/site/content/en/documentation/dsls/sql/ddl/alter.md
- Added new documentation for ALTER CATALOG and ALTER TABLE statements, including examples for column, partition, and property modifications.
website/www/site/content/en/documentation/dsls/sql/ddl/create.md
- Added new documentation for CREATE CATALOG, CREATE DATABASE, and CREATE TABLE statements, with examples for Iceberg catalog and table creation, including Beam-specific properties.
website/www/site/content/en/documentation/dsls/sql/ddl/drop.md
- Added new documentation for DROP CATALOG, DROP DATABASE, and DROP TABLE statements, explaining unregistration versus physical deletion.
website/www/site/content/en/documentation/dsls/sql/ddl/overview.md
- Added a new overview document for Beam SQL DDL, explaining the three-tier namespace (Catalog, Database, Table) and linking to specific DDL command documentation.
website/www/site/content/en/documentation/dsls/sql/ddl/show.md
- Added new documentation for SHOW CATALOGS, SHOW DATABASES, and SHOW TABLES statements, including examples for filtering and checking current context.
website/www/site/content/en/documentation/dsls/sql/ddl/use.md
- Added new documentation for USE CATALOG and USE DATABASE statements, explaining how to set the active context.
website/www/site/content/en/documentation/dsls/sql/extensions/create-catalog.md
- Added detailed documentation for CREATE CATALOG specifically for Apache Iceberg, covering syntax, required/optional properties for various catalog implementations (Hadoop, BigQuery, JDBC), and examples. Includes sections on using catalogs, management, best practices, and troubleshooting.
website/www/site/content/en/documentation/dsls/sql/extensions/create-external-table.md
- Modified to include iceberg and datagen as supported TYPE values in the CREATE EXTERNAL TABLE syntax.
- Added a new comprehensive section for Apache Iceberg table creation, covering syntax, read/write modes, schema mapping, and examples.
website/www/site/layouts/partials/section-menu/en/sdks.html
- Modified to add a new collapsible 'DDL' section under 'Beam SQL' in the navigation menu, linking to the newly added DDL documentation pages.

Activity

ahmedabu98 created this pull request to add SQL DDL documentation to the Beam website.
The changes include adding new markdown files for DDL commands (ALTER, CREATE, DROP, OVERVIEW, SHOW, USE) and a detailed create-catalog.md.
Existing Java code for Iceberg SQL integration was modified to support new table properties and their parsing.
Test cases for Iceberg were updated to reflect the new property naming conventions.
The website's navigation menu was updated to incorporate the new DDL documentation structure.

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github-actions · 2026-02-06T22:42:49Z

Checks are failing. Will not request review until checks are succeeding. If you'd like to override that behavior, comment assign set of reviewers

…erg_getting_started

github-actions · 2026-02-17T21:46:07Z

Assigning reviewers:

R: @kennknowles for label java.
R: @shunping for label website.

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talatuyarer · 2026-02-20T00:10:55Z

website/www/site/content/en/documentation/dsls/sql/ddl/create.md

+    'uri'            = 'https://biglake.googleapis.com/iceberg/v1/restcatalog',
+    'warehouse'      = 'gs://my-company-bucket/warehouse',
+    'header.x-goog-user-project' = 'my_prod_project',
+    'rest.auth.type' = 'org.apache.iceberg.gcp.auth.GoogleAuthManager',


We can use rest.auth.type='google' We dont need to give fullname of class.

talatuyarer · 2026-02-20T00:13:58Z

website/www/site/content/en/documentation/dsls/sql/ddl/overview.md

+# Beam SQL DDL Overview
+
+Beam SQL provides a robust hierarchy for managing metadata for external data sources. Instead of treating all tables as flat objects, Beam SQL utilizes a three-tier namespace system:
+1. Catalog: The highest level container (e.g. a Glue Catalog connected to S3 or a BigLake Catalog connected to GCS).


Maybe you should mentioned Hive too ?

talatuyarer · 2026-02-20T00:15:14Z

website/www/site/content/en/documentation/dsls/sql/ddl/overview.md

+2. Database: A logical namespace within a Catalog (often maps to "namespace" in systems like Iceberg).
+3. Table: The actual data entity containing schema and rows.
+
+This structure allows users to connect to multiple disparate systems (e.g., a production BigQuery catalog and a dev Iceberg catalog) simultaneously and switch contexts seamlessly.


Can users join two tables from different catalog such as a table from Hive and another from Biglake ?

talatuyarer and others added 2 commits September 30, 2025 00:46

create catalog and iceberg table details

b52c85f

Merge branch 'master' of https://github.com/ahmedabu98/beam into iceb…

092ea3e

…erg_getting_started

github-actions bot added java website io extensions sql labels Feb 6, 2026

add sql ddl website documentation

257cd5a

ahmedabu98 force-pushed the iceberg_getting_started branch from f2675e8 to 257cd5a Compare February 6, 2026 21:47

add links

0d6ea98

ahmedabu98 added 2 commits February 8, 2026 15:10

spotless

aa5d701

Merge branch 'master' of https://github.com/ahmedabu98/beam into iceb…

5ff507c

…erg_getting_started

github-actions bot added the Next Action: Reviewers label Feb 17, 2026

talatuyarer reviewed Feb 20, 2026

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SQL DDL documentation#37539

SQL DDL documentation#37539
ahmedabu98 wants to merge 6 commits intoapache:masterfrom
ahmedabu98:iceberg_getting_started

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ahmedabu98 commented Feb 6, 2026

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