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SHOW, SHOW DATABASES, and SHOW SCHEMAS Statements 13765
SHOW Statement The SHOW statement can also show the schema of a table, view or query, like DESCRIBE . As of DuckDB 2.0, this usage is deprecated and prints a warning; use DESCRIBE instead. New The following feature was introduced in DuckDB ... etting share the name, SHOW describes the table and prints a deprecation warning (use DESCRIBE for tables). DESCRIBE never resolves a setting. The show_behavior setting configures how SHOW resolves a bare identifier: 'auto' (default): describe a table if ...
https://man.mtool.work/duckdb/2.0/sql/statements/show.html
Appender 9904
Use an appender to insert rows that your Python code produces. It collects rows and writes them together in one SQL statement; this is called flushing. The with block below flushes on successful exit: import duckdb con = duckdb.connect() co ... odule. They use the default connection unless you supply the connection argument. Appending to a Table con.appender(table) resolves the table once, when the appender is created, the way SQL resolves a table name. It appends to the table's columns in decl ...
https://man.mtool.work/duckdb/2.0/clients/python/appender.html
Describe 9314
Describing a Table To view the schema of a table, use the DESCRIBE statement (or its alias DESC ) followed by the table name. CREATE TABLE tbl (i INTEGER PRIMARY KEY, j VARCHAR); DESCRIBE tbl; column_name column_type null key default extra ... with SHOW tbl is deprecated and emits a warning. Use DESCRIBE tbl instead. The show_behavior setting controls whether SHOW resolves a bare identifier to a table or a setting. Describing a Query To view the schema of the result of a query, prepend DESCRIB ...
https://man.mtool.work/duckdb/2.0/guides/meta/describe.html
Instantiate 9010
Overview DuckDB-Wasm can be instantiated in several ways, depending on how your application bundles and serves its assets. Each approach resolves the mainModule (the WebAssembly file) and the mainWorker (the worker script) for the browser's ... onst db = new duckdb.AsyncDuckDB(logger, worker); await db.instantiate(bundle.mainModule, bundle.pthreadWorker); vite Vite resolves assets a little differently: appending the ?url suffix to an import tells Vite to return the asset's final URL rather than ...
https://man.mtool.work/duckdb/2.0/clients/wasm/instantiation.html
Troubleshoot 8420
Overview This page collects common issues encountered when using the DuckDB JDBC driver, together with their workarounds. If you run into a problem that is not covered here, search the driver's issue tracker on GitHub. Driver Class Not Foun ... ⟨class and method⟩ at com.oracle.svm.core.jni.functions.JNIFunctions$Support.getMethodID(JNIFunctions.java) ... The driver resolves its entire JNI surface eagerly when its native library initializes, so a single class, method, or field missing from the r ...
https://man.mtool.work/duckdb/2.0/clients/java/troubleshoot.html
Profile and Monitor 8134
Overview The JDBC driver exposes several ways to observe a running or completed query: cancelling and timing out queries, polling query progress, retrieving profiling output, and emitting memory-usage events through Java Flight Recorder . T ... ress , and therefore a single component label, per-component attribution requires each component to open a connection that resolves to a distinct instance. An unnamed in-memory jdbc:duckdb: URL creates a connection-private instance, which makes it the si ...
https://man.mtool.work/duckdb/2.0/clients/java/profiling.html
Keywords and Identifiers 8134
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 ... biguous. Table names can likewise be qualified as ⟨database⟩.⟨schema⟩.⟨table⟩ . When a name is not fully qualified, DuckDB resolves it using the catalog search path. The search path is controlled by the schema and search_path configuration options : sche ...
https://man.mtool.work/duckdb/2.0/sql/dialect/keywords_and_identifiers.html
AWS Extension 7830
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 ... Y_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. The s3_region setting ( SET s3_region = '⟨region⟩' ) ...
https://man.mtool.work/duckdb/2.0/core_extensions/aws.html
Struct Data Type 7544
Conceptually, a STRUCT column contains an ordered list of columns called “entries”. The entries are referenced by name using strings. This document refers to those entry names as keys. Each row in the STRUCT column must have the same keys. ... h referring to schemas and tables. In general, DuckDB looks for columns first, then for struct keys within columns. DuckDB resolves references in these orders, using the first match to occur: No Dots SELECT part1 FROM tbl; part1 is a column One Dot SELEC ...
https://man.mtool.work/duckdb/2.0/sql/data_types/struct.html
Configuration 7240
DuckDB has a number of configuration options that can be used to change the behavior of the system. The configuration options can be set using either the SET statement or the PRAGMA statement . They can be reset to their original values usi ... t the directory in which persistent secrets are stored. VARCHAR ~/.duckdb/stored_secrets show_behavior Configures how SHOW resolves a bare identifier. 'auto' describes a table if one exists, else it describes a setting (deprecated). 'table' always descri ...
https://man.mtool.work/duckdb/2.0/configuration/overview.html
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