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- ADBC Client – DuckDB 13463
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...tatement to bind the stream of data and execute the query. import adbc_driver_duckdb.dbapi import pyarrow data = pyarrow . record_batch ( [[ 1 , 2 , 3 , 4 ], [ "a" , "b" , "c" , "d" ]], names = [ "ints" , "strs" ], ) with adbc_driver_duckdb . dbapi . c...ns regarding the location of this file.) The following example uses an in-memory DuckDB database to modify in-memory Arrow RecordBatches via SQL queries: package main import ( "bytes" "context" "fmt" "io" "github.com/apache/arrow-adbc/go/adbc" "github....row/array" "github.com/apache/arrow-go/v18/arrow/ipc" "github.com/apache/arrow-go/v18/arrow/memory" ) func _makeSampleArrowRecord () arrow . Record { b := array . NewFloat64Builder ( memory . DefaultAllocator ) b . AppendValues ([] float64 { 1 , 2 , 3... - https://man.mtool.work/duckdb/1.3/clients/adbc.html
- Export to Apache Arrow – DuckDB 10012
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...of a query can be exported to an Apache Arrow Table using the arrow function. Alternatively, results can be returned as a RecordBatchReader using the fetch_record_batch function and results can be read one batch at a time. In addition, relations built..._arrow_table" and return as an Arrow Table results = duckdb . sql ( "SELECT * FROM my_arrow_table" ). arrow () Export as a RecordBatchReader import duckdb import pyarrow as pa my_arrow_table = pa . Table . from_pydict ({ 'i' : [ 1 , 2 , 3 , 4 ], 'j' :...[ "one" , "two" , "three" , "four" ]}) # query the Apache Arrow Table "my_arrow_table" and return as an Arrow RecordBatchReader chunk_size = 1_000_000 results = duckdb . sql ( "SELECT * FROM my_arrow_table" ). fetch_record_batch ( chunk_si... - https://man.mtool.work/duckdb/1.3/guides/python/export_arrow.html
- Avro Extension – DuckDB 9850
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ossible: An Avro union of any type and the special null type is simplified to just the non-null type. For example, an Avro record of the union type ["int","null"] becomes a DuckDB INTEGER , which just happens to be NULL sometimes. Similarly, an Avro un...ion that contains only a single type is converted to the type it contains. For example, an Avro record of the union type ["int"] also becomes a DuckDB INTEGER . The extension also "flattens" the Avro schema. Avro defines tabl...es as root-level "record" fields, which are the same as DuckDB STRUCT fields. For more convenient handling, this extension turns the entries of a s... - https://man.mtool.work/duckdb/1.3/core_extensions/avro.html
- Python Client API – DuckDB 8232
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
..., date_as_object : bool = False ) → pandas.DataFrame ¶ Fetch a chunk of the result as DataFrame following execute() fetch_record_batch ( self : duckdb.duckdb.DuckDBPyConnection , rows_per_batch : int = 1000000 ) → pyarrow.lib.RecordBatchReader ¶ Fetch...an Arrow RecordBatchReader following execute() fetchall ( self : duckdb.duckdb.DuckDBPyConnection ) → list ¶ Fetch all rows from a result...mns : Optional [ object ] = None , sample_size : Optional [ object ] = None , maximum_depth : Optional [ object ] = None , records : Optional [ str ] = None , format : Optional [ str ] = None , date_format : Optional [ object ] = None , timestamp_forma... - https://man.mtool.work/duckdb/1.3/clients/python/reference/
- Conversion between DuckDB and Python – DuckDB 8160
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...e (1 by default). Apache Arrow arrow() fetches the data as an Arrow table fetch_arrow_table() is an alias of arrow() fetch_record_batch(chunk_size) returns an Arrow record batch reader with chunk_size rows per batch Polars pl() fetches the data as a Po... - https://man.mtool.work/duckdb/1.3/clients/python/conversion.html
- Window Functions – DuckDB 7891
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...an event with the best time to date SELECT event , date , athlete , time first_value ( time ORDER BY time DESC ) OVER w AS record_time , first_value ( athlete ORDER BY time DESC ) OVER w AS record_athlete , FROM meet_results WINDOW w AS ( PARTITION BY...o it. In the following example, we want to know how an athlete's time in an event compares to the average of all the times recorded for their event within ±10 days: SELECT event , date , athlete , avg ( time ) OVER w AS recent , FROM results WINDOW w A... - https://man.mtool.work/duckdb/1.3/sql/functions/window_functions.html
- Iceberg Extension – DuckDB 7819
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...g_metadata ( iceberg_table ); manifest_path manifest_sequence_number manifest_content status content file_path file_format record_count lineitem_iceberg/metadata/10eaca8a-1e1c-421e-ad6d-b232e5ee23d3-m1.avro 2 DATA ADDED EXISTING lineitem_iceberg/data/0... - https://man.mtool.work/duckdb/1.3/core_extensions/iceberg/overview.html
- Vector Similarity Search Extension – DuckDB 7729
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
..._col, right_col, k, metric := 'l2sq') vss_match(right_table", left_col, right_col, k, metric := 'l2sq') k is the number of records to be selected from the right_table for each left_table record, ordered by the score. These do not currently make use of... - https://man.mtool.work/duckdb/1.3/core_extensions/vss.html
- Relational API – DuckDB 7639
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...uckDBPyRelation Description Create a relation object from an Arrow object Parameters arrow_object : pyarrow.Table, pyarrow.RecordBatch Arrow object to create a relation from Example import duckdb import pyarrow as pa ids = pa . array ([ 1 ], type = pa...bject ] = None , sample_size : typing . Optional [ object ] = None , maximum_depth : typing . Optional [ object ] = None , records : typing . Optional [ str ] = None , format : typing . Optional [ str ] = None , date_format : typing . Optional [ object...of rows to sample for inferring JSON schema. maximum_depth : object Maximum depth to which JSON objects should be parsed. records : str Format string specifying whether JSON is in records mode. format : str Format of the JSON data (e.g., 'auto', 'newl... - https://man.mtool.work/duckdb/1.3/clients/python/relational_api.html
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