Results of 1 - 10 of about 42 for Internal (0.003 sec.)
- DuckDB_% Metadata Functions 15731
- DuckDB offers a collection of table functions that provide metadata about the current database. These functions reside in the main schema and their names are prefixed with duckdb_ . The resultset returned by a duckdb_ table function may be
...e views do a SELECT on the duckdb_ table function with the same name, while filtering out those objects that are marked as internal. We mention it here, because if you accidentally omit the parentheses in your duckdb_ table function call, you might still...but from the identically named view. Example: The duckdb_views() table function returns all views, including those marked internal: SELECT * FROM duckdb_views(); The duckdb_views view returns views that are not marked as internal: SELECT * FROM duckdb_v...ance. Column Description Type database_name The name of the database that contains the column object. VARCHAR database_oid Internal identifier of the database that contains the column object. BIGINT schema_name The SQL name of the schema that contains th... - https://man.mtool.work/duckdb/2.0/sql/meta/duckdb_table_functions.html
- Internal Errors 12201
- Internal errors signal an assertion failure within DuckDB. They usually occur due to unexpected conditions or errors in the program's logic. For example, running issue 17002 on DuckDB 1.2.1 results in an internal error. INTERNAL Error: Atte
...ted to access index 3 within vector of size 3 The issue is fixed in DuckDB 1.2.2 and newer versions. After encountering an internal error, DuckDB enters “restricted mode”, where any further operations will result in the following error message: FATAL Err...session on the same database. The reason DuckDB enters “restricted mode” is because the database is in an undefined state. Internal errors are by definition bugs that should never happen so the code path is never tested. If you encounter an internal erro... - https://man.mtool.work/duckdb/2.0/dev/internal_errors.html
- Types 9243
- DuckDB is a strongly typed database system. As such, every column has a single type specified. This type is constant over the entire column. That is to say, a column that is labeled as an INTEGER column will only contain INTEGER values. Duc
...n can be used to check if a specific value is NULL or not. The exception to the auto-cast rule is the duckdb_value_varchar_internal function. This function does not auto-cast and only works for VARCHAR columns. The reason this function exists is that the..._width ( duckdb_logical_type type ); uint8_t duckdb_decimal_scale ( duckdb_logical_type type ); duckdb_type duckdb_decimal_internal_type ( duckdb_logical_type type ); duckdb_type duckdb_enum_internal_type ( duckdb_logical_type type ); uint32_t duckdb_enu..._streaming Warning Deprecation notice. This method is scheduled for removal in a future release. Checks if the type of the internal result is StreamQueryResult. Syntax bool duckdb_result_is_streaming ( duckdb_result result ); Parameters result : The resu... - https://man.mtool.work/duckdb/2.0/clients/c/types.html
- Crashes 9058
- DuckDB is thoroughly tested via an extensive test suite. However, bugs can still occur and these can sometimes lead to crashes. This page contains practical information on how to troubleshoot DuckDB crashes. Types of Crashes There are a few
...The process stops with a SIGSEGV (segmentation fault), SIGABRT , etc.: these should never occur. Please submit an issue . Internal errors: an operation may result in an Internal Error , e.g.: console INTERNAL Error: Attempted to access index 3 within ve...ctor of size 3 After encountering an internal error, DuckDB enters a restricted mode where any further operations will result in the following error message: console FA...: Corrupt WAL file: entry at byte position [...] computed checksum [...] does not match stored checksum [...] Similarly to internal errors, calls to a database after encountering these errors will return a FATAL error . Most often the checksum error is t... - https://man.mtool.work/duckdb/2.0/guides/troubleshooting/crashes.html
- Complete API 8593
- This page contains the reference for DuckDB's C API. The reference contains several deprecation notices. These concern methods whose long-term availability is not guaranteed as they may be removed in the future. That said, DuckDB's develope
...t row ); duckdb_string duckdb_value_string ( duckdb_result * result , idx_t col , idx_t row ); char * duckdb_value_varchar_internal ( duckdb_result * result , idx_t col , idx_t row ); duckdb_string duckdb_value_string_internal ( duckdb_result * result ,..._width ( duckdb_logical_type type ); uint8_t duckdb_decimal_scale ( duckdb_logical_type type ); duckdb_type duckdb_decimal_internal_type ( duckdb_logical_type type ); duckdb_type duckdb_enum_internal_type ( duckdb_logical_type type ); uint32_t duckdb_enu...mount of configuration options available for usage with duckdb_get_config_flag . This should not be called in a loop as it internally loops over all the options. Return Value The amount of config options available. Syntax size_t duckdb_config_count ( );... - https://man.mtool.work/duckdb/2.0/clients/c/api.html
- Overview 8531
- The pages in this section are intended for developers who contribute to DuckDB or build extensions for it. If you would like to contribute, please also read the contributing guidelines . Project Structure and Processes DuckDB Repositories l
...uction introduces the sqllogictest format used for most of DuckDB's tests. Writing Tests describes how to write new tests. Internal Errors explains what internal errors are and how to debug them. Performance Profiling shows how to use DuckDB's built-in q... - https://man.mtool.work/duckdb/2.0/dev/overview.html
- Troubleshoot 8128
- 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
...esult in this error: Exception in thread "main" java.lang.ClassNotFoundException: org.duckdb.DuckDBDriver at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoa...d JNI version 0xffffffff, required by ⟨path⟩/libduckdb_java.⟨suffix⟩ This is what the library's JNI_OnLoad reports when an internal lookup failed, and the cause is the same missing metadata, not a JNI version problem. Native Image: UnsatisfiedLinkError:... - https://man.mtool.work/duckdb/2.0/clients/java/troubleshoot.html
- Querying Parquet Metadata 8128
- Parquet Metadata The parquet_metadata function can be used to query the metadata contained within a Parquet file, which reveals various internal details of the Parquet file such as the statistics of the different columns. This can be useful
...max_is_exact BOOLEAN row_group_compressed_bytes BIGINT Parquet Schema The parquet_schema function can be used to query the internal schema contained within a Parquet file. Note that this is the schema as it is contained within the metadata of the Parquet...e it is easier to use DESCRIBE . Fetch the column names and column types: DESCRIBE SELECT * FROM 'test.parquet'; Fetch the internal schema of a Parquet file: SELECT * FROM parquet_schema('test.parquet'); Below is a table of the columns returned by parque... - https://man.mtool.work/duckdb/2.0/data/parquet/metadata.html
- Writing Tests 7741
- Development and Testing It is crucial that any new features that get added have correct tests that not only test the “happy path”, but also test edge cases and incorrect usage of the feature. In this section, we describe how DuckDB tests ar
...─────────────────────────┘ test_vector_types has an optional argument called all_flat of type BOOL . This only affects the internal representation of the vector. FROM test_vector_types(NULL::ROW(i INTEGER, j VARCHAR, k DOUBLE), NULL::TIMESTAMP, all_flat...= true); -- the output is the same as above but with a different internal representation... - https://man.mtool.work/duckdb/2.0/dev/sqllogictest/writing_tests.html
- Data Chunks 7679
- Data chunks represent a horizontal slice of a table. They hold a number of vectors , that can each hold up to the VECTOR_SIZE rows. The vector size can be obtained through the duckdb_vector_size function and is configurable, but is usually
...kDB. Be aware, however, that correctly interfacing with DuckDB using the data chunk API does require knowledge of DuckDB's internal vector format. Data chunks can be used in two manners: Reading Data : Data chunks can be obtained from query results using...db_append_data_chunk to write data to the database. The primary manner of interfacing with data chunks is by obtaining the internal vectors of the data chunk using the duckdb_data_chunk_get_vector method. Afterwards, the vector methods can be used to rea... - https://man.mtool.work/duckdb/2.0/clients/c/data_chunk.html
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