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https://issues.apache.org/jira/browse/NIFI-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15101900#comment-15101900
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Daniel Cave commented on NIFI-1093:
-----------------------------------
I've seen this same behaviour as well on trying to convert JSON to SQL when not
all fields are present. The processor reads the schema from the database and
hard validates that all fields are present using the TableSchema POJO.
Unless anyone disagrees, I will add the suggested UnmatchedColumnBehaviour
property allow "requiredColumnNames" to generate a warning rather than a
failure.
> ConvertJSONToSQL incorrectly detects required columns
> -----------------------------------------------------
>
> Key: NIFI-1093
> URL: https://issues.apache.org/jira/browse/NIFI-1093
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Reporter: Randy Gelhausen
> Fix For: 0.5.0
>
>
> create table device_pings(id varchar not null, ts varchar not null, bssid
> varchar, ssid varchar, noise integer, signal integer, constraint pk primary
> key (id, ts))
> With the example DDL above, neither SSID nor BSSID are required fields, yet
> ConvertJSONToSQL throws an exception if the input JSON lacks those fields:
> 2015-11-01 17:47:10,373 ERROR [Timer-Driven Process Thread-6]
> o.a.n.p.standard.ConvertJSONToSQL
> ConvertJSONToSQL[id=a336eb2b-fc63-4118-b098-c0ded1dd5520] Failed to convert
> StandardFlowFileRecord[uuid=5d2c05f0-982e-4feb-94b1-d9946be730d4,claim=StandardContentClaim
> [resourceClaim=StandardResourceClaim[id=1446416358991-2, container=default,
> section=2], offset=203306,
> length=614],offset=0,name=1446418019645796000,size=614] to a SQL INSERT
> statement due to org.apache.nifi.processor.exception.ProcessException: JSON
> does not have a value for the Required column 'BSSID'; routing to failure:
> org.apache.nifi.processor.exception.ProcessException: JSON does not have a
> value for the Required column 'BSSID'
> 2015-11-01 17:47:10,381 ERROR [Timer-Driven Process Thread-6]
> o.a.n.p.standard.ConvertJSONToSQL
> ConvertJSONToSQL[id=a336eb2b-fc63-4118-b098-c0ded1dd5520] Failed to convert
> StandardFlowFileRecord[uuid=727b8c3c-66c5-4d6a-8cdc-602da8b80132,claim=StandardContentClaim
> [resourceClaim=StandardResourceClaim[id=1446416358991-2, container=default,
> section=2], offset=203920,
> length=674],offset=0,name=1446418019645796000,size=674] to a SQL INSERT
> statement due to org.apache.nifi.processor.exception.ProcessException: JSON
> does not have a value for the Required column 'SSID'; routing to failure:
> org.apache.nifi.processor.exception.ProcessException: JSON does not have a
> value for the Required column 'SSID'
> The processor has "Unmatched Field Behavior" property. Should there be an
> additional property "Unmatched Column Behavior" property that allows SQL
> statements to be generated from the set of columns actually available in the
> JSON?
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