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https://issues.apache.org/jira/browse/NIFI-14579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Piotr Zalas updated NIFI-14579:
-------------------------------
Description:
Currently ExcelReader service allows to configure *Schema Access Strategy*
parameter as {*}Use Starting Row{*}. With this parameter, only 10 first rows
are used to infer schema of columns in the sheet, as opposed to *Infer Schema*
strategy.
My user requests that all rows in the sheet are used to infer schema. Moreover,
the service is used in QueryRecord processor to limit number of rows read (as
described in NIFI-14427). The user wants to infer schema only from rows they
read, not all rows in the sheet.
It would be great to add parameter to ExcelReader that allows to configure
number of rows read during schema inference (i.e.
{{ExcelHeaderSchemaStrategy#NUM_ROWS_TO_DETERMINE_TYPES}} variable). The
parameter could probably show conditionally based on value of {*}Schema Access
Strategy{*}. Value 0 could have special meaning that all rows in the sheet
should be read. The default value could be 10 to preserve existing behavior.
was:
Currently ExcelReader service allows to configure *Schema Access Strategy*
parameter as {*}Use Starting Row{*}. With this parameter, only 10 first rows
are used to infer schema of columns in the sheet, as opposed to *Infer Schema*
strategy.
My user requests that all rows in the sheet are used to infer schema. Moreover,
the service is used in QueryRecord processor to limit number of rows read (as
described in NIFI-14427). The user wants to infer schema only from rows they
read, not all rows in the sheet.
It would be great to add parameter to ExcelReader, that allows to configure
number of rows read during schema inference (i.e.
{{ExcelHeaderSchemaStrategy#NUM_ROWS_TO_DETERMINE_TYPES}} variable). The
parameter could probably show conditionally based on value of {*}Schema Access
Strategy{*}.
> Add parameter to configure number of rows used in schema inference with
> header in ExcelReader service
> -----------------------------------------------------------------------------------------------------
>
> Key: NIFI-14579
> URL: https://issues.apache.org/jira/browse/NIFI-14579
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Reporter: Piotr Zalas
> Priority: Major
>
> Currently ExcelReader service allows to configure *Schema Access Strategy*
> parameter as {*}Use Starting Row{*}. With this parameter, only 10 first rows
> are used to infer schema of columns in the sheet, as opposed to *Infer
> Schema* strategy.
> My user requests that all rows in the sheet are used to infer schema.
> Moreover, the service is used in QueryRecord processor to limit number of
> rows read (as described in NIFI-14427). The user wants to infer schema only
> from rows they read, not all rows in the sheet.
> It would be great to add parameter to ExcelReader that allows to configure
> number of rows read during schema inference (i.e.
> {{ExcelHeaderSchemaStrategy#NUM_ROWS_TO_DETERMINE_TYPES}} variable). The
> parameter could probably show conditionally based on value of {*}Schema
> Access Strategy{*}. Value 0 could have special meaning that all rows in the
> sheet should be read. The default value could be 10 to preserve existing
> behavior.
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