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- Conversion between DuckDB and Python – DuckDB 13610
- This page is for DuckDB 1.3, which is outdated.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
....datetime.max to convert to -inf and +inf respectively. If the datetime has tzinfo, we will use TIMESTAMPTZ , otherwise it becomes TIMESTAMP . datetime.time If the time has tzinfo, we will use TIMETZ , otherwise it becomes TIME . datetime.date date conv...to BLOB by default, when it's used to construct a Value object of type BITSTRING , it maps to BITSTRING instead. list list becomes a LIST type of the “most permissive” type of its children, for example: my_list_value = [ 12345 , "test" ] Will become VAR...lues ( my_map_dict ) Then we'll convert it to a MAP of key-value pairs of the two lists zipped together. The example above becomes a MAP(INTEGER, VARCHAR) : ┌─────────────────────────┐ │ {1=one, 2=two, 3=three} │ │ map(integer, varchar) │ ├─────────────... - https://man.mtool.work/duckdb/1.3/clients/python/conversion.html
- Avro Extension – DuckDB 9669
- This page is for DuckDB 1.3, which is outdated.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
...he 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 union that contains only a single type is c...onverted 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 tables as root-level "record" fields, which... - https://man.mtool.work/duckdb/1.3/core_extensions/avro.html
- Parquet Tips – DuckDB 8513
- This page is for DuckDB 1.3, which is outdated.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
...ly to the behaviour of FILE_SIZE_BYTES . However, if PER_THREAD_OUTPUT is set, only one thread writes to each file, and it becomes accurate again. See the Performance Guide on “File Formats” for more tips. 関連キーワード Parquet groups parquet number gr... - https://man.mtool.work/duckdb/1.3/data/parquet/tips.html
- Indexes – DuckDB 8278
- 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
...(2048 rows) moving through DuckDB's processing pipeline. When updating i = 2047 to i = 2048 , we do not yet know that 2048 becomes 2049, and so forth. That is because we have not yet seen that chunk. Thus, we throw a constraint violation. CREATE TABLE m... - https://man.mtool.work/duckdb/1.3/sql/indexes.html
- Samples – DuckDB 8278
- 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
...amongst the different threads to ensure unbiased sampling. This is not a big problem when the reservoir is very small, but becomes costly when the sample is large. Bestpractice Avoid using reservoir sampling with large sample sizes if possible. Reservoi... - https://man.mtool.work/duckdb/1.3/sql/samples.html
- Numeric Types – DuckDB 8043
- 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
...ize for a VARINT is 4 bytes, every digit takes up an extra bit, rounded up to 8 (12 digits take 12 bits, rounded up to 16, becomes two extra bytes). Both negative and positive values are supported by the VARINT type. Fixed-Point Decimals The data type D... - https://man.mtool.work/duckdb/1.3/sql/data_types/numeric.html
- CREATE TABLE Statement – DuckDB 8043
- 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
...t if the temp_directory configuration is set when connecting or with a SET command, data will be spilled to disk if memory becomes constrained. Create a temporary table from a CSV file (automatically detecting column names and types): CREATE TEMP TABLE... - https://man.mtool.work/duckdb/1.3/sql/statements/create_table.html
- COPY Statement – DuckDB 7808
- 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
...ly to the behaviour of FILE_SIZE_BYTES . However, if per_thread_output is set, only one thread writes to each file, and it becomes accurate again. BIGINT (empty) PARQUET_VERSION The parquet version to use ( V1 , V2 ). VARCHAR V1 Some examples of FIELD_I... - https://man.mtool.work/duckdb/1.3/sql/statements/copy.html
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