spec_arrow_fetch_arrow: spec_arrow_fetch_arrow
In DBItest: Testing DBI Backends
spec_arrow_fetch_arrow R Documentation
spec_arrow_fetch_arrow
Description
spec_arrow_fetch_arrow
Value
dbFetchArrow() always returns an object coercible to a data.frame with
as many rows as records were fetched and as many
columns as fields in the result set,
even if the result is a single value
or has one
or zero rows.
Failure modes
An attempt to fetch from a closed result set raises an error.
Specification
Fetching multi-row queries with one
or more columns by default returns the entire result.
The object returned by dbFetchArrow() can also be passed to
nanoarrow::as_nanoarrow_array_stream() to create a nanoarrow
array stream object that can be used to read the result set
in batches.
The chunk size is implementation-specific.
See Also
Other Arrow specifications:
spec_arrow_append_table_arrow,
spec_arrow_create_table_arrow,
spec_arrow_fetch_arrow_chunk,
spec_arrow_get_query_arrow,
spec_arrow_read_table_arrow,
spec_arrow_send_query_arrow,
spec_arrow_write_table_arrow,
spec_result_clear_result
DBItest documentation built on June 22, 2024, 11:55 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
| spec_arrow_fetch_arrow | R Documentation |
spec_arrow_fetch_arrow
Description
spec_arrow_fetch_arrow
Value
dbFetchArrow() always returns an object coercible to a data.frame with
as many rows as records were fetched and as many
columns as fields in the result set,
even if the result is a single value
or has one
or zero rows.
Failure modes
An attempt to fetch from a closed result set raises an error.
Specification
Fetching multi-row queries with one
or more columns by default returns the entire result.
The object returned by dbFetchArrow() can also be passed to
nanoarrow::as_nanoarrow_array_stream() to create a nanoarrow
array stream object that can be used to read the result set
in batches.
The chunk size is implementation-specific.
See Also
Other Arrow specifications:
spec_arrow_append_table_arrow,
spec_arrow_create_table_arrow,
spec_arrow_fetch_arrow_chunk,
spec_arrow_get_query_arrow,
spec_arrow_read_table_arrow,
spec_arrow_send_query_arrow,
spec_arrow_write_table_arrow,
spec_result_clear_result
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.