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Troubleshooting Quack 14850
DuckDB 2.0 ships a polished version of Quack (first released in DuckDB 1.5.3) with substantial performance and stability improvements. If you experience any issues with Quack, try upgrading all your DuckDB clients to the latest version of t ... ot silently skip the problematic table. A common cause is an Iceberg catalog attached on the server with the default TABLE_RESOLUTION 'lazy' . Lazily resolved tables are listed with a placeholder column of type UNKNOWN , which the client receives through d ... et resolved the table's schema. Resolving Tables Eagerly on the Server Attach the Iceberg catalog on the server with TABLE_RESOLUTION 'eager' so that schemas are resolved while tables are enumerated, which lets Quack import their real definitions: {:.codeb ... ACH 'warehouse' AS ice ( TYPE iceberg, URI 'https://catalog.example.com/api/catalog', SECRET iceberg_catalog_secret, TABLE_RESOLUTION 'eager' ); CREATE TABLE local_data AS SELECT 42 AS i; CALL quack_serve('quack:localhost', token = 'example-token'); The cl ...
https://man.mtool.work/duckdb/2.0/quack/troubleshooting.html
S3 and AWS Authentication 8639
This page is the entry point for authenticating to S3 and other AWS services from DuckDB. Authentication is configured using secrets , and the detailed reference material lives on the S3 API Support and AWS Extension pages. The sections bel ... ming a Role (STS) Web Identity (IRSA) Single Sign-On (SSO) For behavior common to all credential_chain secrets, see Region Resolution , Validation , and Auto-Refresh . Secret Parameters The full list of S3 secret parameters that apply to both providers ( E ...
https://man.mtool.work/duckdb/2.0/core_extensions/httpfs/authentication.html
Iceberg Options 8639
This page lists the options of the iceberg extension: the parameters accepted by the Iceberg functions , the options of the ATTACH and CREATE SECRET statements used to connect to a catalog , and the global settings. ATTACH Options To make a ... s such as AWS Glue that do not assign a table location server-side. Note: this feature was introduced in DuckDB 2.0. TABLE_RESOLUTION VARCHAR lazy Controls when table schemas are resolved. Accepted values: lazy , eager . With lazy (the default), a table's ... ables are enumerated, which adds metadata-loading work and can increase catalog enumeration time for large catalogs. Eager resolution is needed when a Quack client attaches a server whose catalog still has unresolved tables. PREFIX VARCHAR (empty) Path pre ...
https://man.mtool.work/duckdb/2.0/core_extensions/iceberg/iceberg_options.html
Timestamp Issues 8516
Timestamp with Time Zone Promotion Casts Working with time zones in SQL can be quite confusing at times. For example, when filtering to a date range, one might try the following query: SET timezone = 'America/Los_Angeles'; CREATE TABLE time ... e timestamps being modeled. For example, if the application is modeling electrical supply and demand out to 2100 at hourly resolution, one can create the calendar table like so: SET timezone = 'Europe/Amsterdam'; CREATE OR REPLACE TABLE hourly AS SELECT ts ...
https://man.mtool.work/duckdb/2.0/guides/sql_features/timestamps.html
Iceberg Extension 8393
The iceberg extension implements support for the Apache Iceberg open table format . There are two ways to work with Iceberg in DuckDB: Individual tables are read directly from storage, by pointing at a table's metadata. This requires no cat ... eberg/lineitem_iceberg', allow_moved_paths = true); count_star() 51793 The allow_moved_paths option ensures that some path resolution is performed, which allows scanning Iceberg tables that are moved. You can also directly specify the current manifest in t ...
https://man.mtool.work/duckdb/2.0/core_extensions/iceberg/overview.html
Keywords and Identifiers 8269
Identifiers Similarly to other SQL dialects and programming languages, identifiers in DuckDB's SQL are subject to several rules. Unquoted identifiers need to conform to a number of rules: They must not be a reserved keyword (see duckdb_keyw ... example: SELECT * FROM (SELECT unnest({'a': 42, 'b': {'a': 88, 'b': 99}}, recursive := true)); a a_1 b 42 88 99 Identifier Resolution Identifiers can be qualified to remove ambiguity. A fully qualified column reference has the form ⟨database⟩.⟨schema⟩.⟨tab ...
https://man.mtool.work/duckdb/2.0/sql/dialect/keywords_and_identifiers.html
PostgreSQL Compatibility 8269
DuckDB's SQL dialect closely follows the conventions of the PostgreSQL dialect. The few exceptions to this are listed on this page. Floating-Point Arithmetic DuckDB and PostgreSQL handle floating-point arithmetic differently for division by ... B in DuckDB and 1024 bytes in PostgreSQL, and pg_size_pretty(1048576) returns 1.0 MiB in DuckDB and 1024 kB in PostgreSQL. Resolution of Type Names in the Schema For CREATE TABLE statements , DuckDB attempts to resolve type names in the schema where a tabl ...
https://man.mtool.work/duckdb/2.0/sql/dialect/postgresql_compatibility.html
AWS Extension 8129
The aws extension adds functionality, e.g., authentication, on top of the httpfs extension's S3 capabilities , using the AWS SDK. Installing and Loading The aws extension will be transparently autoloaded on first use from the official exten ... chain, HTTP_PROXY '⟨proxy.example.com:8080⟩', HTTP_PROXY_USERNAME '⟨username⟩', HTTP_PROXY_PASSWORD '⟨password⟩' ); Region Resolution If no region is provided explicitly, DuckDB resolves it from the following sources, in order: The REGION secret parameter. ...
https://man.mtool.work/duckdb/2.0/core_extensions/aws.html
S3 API Support 8129
The httpfs extension supports reading/writing/ globbing files on object storage servers using the S3 API. S3 offers a standard API to read and write to remote files (while regular http servers, predating S3, do not offer a common write API) ... e full set of credential_chain options — CHAIN values, profile selection, assuming roles, SSO, web identity (IRSA), region resolution, validation, and auto-refresh — see the AWS extension page . Overview of S3 Secret Parameters Below is a complete list of ...
https://man.mtool.work/duckdb/2.0/core_extensions/httpfs/s3api.html
Quack Remote Protocol 8129
The Quack extension turns a DuckDB instance into a server that other DuckDB instances (clients) can connect to over HTTP. This page covers the protocol at a glance and walks through basic usage on both sides of the wire. For the full list o ... on that cannot be bound fails the whole attachment. If this happens (for example, with an Iceberg catalog using lazy table resolution), see ATTACH Fails to Bind a Remote Table Definition . Routing a Session with CONNECT Once a remote is attached, the CONNE ...
https://man.mtool.work/duckdb/2.0/quack/overview.html
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