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https://issues.apache.org/jira/browse/PARQUET-2305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17730184#comment-17730184
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ASF GitHub Bot commented on PARQUET-2305:
-----------------------------------------
tddfan commented on code in PR #1102:
URL: https://github.com/apache/parquet-mr/pull/1102#discussion_r1221865678
##########
parquet-protobuf/src/main/java/org/apache/parquet/proto/ProtoMessageConverter.java:
##########
@@ -86,32 +89,71 @@ class ProtoMessageConverter extends GroupConverter {
this.conf = conf;
this.parent = pvc;
this.extraMetadata = extraMetadata;
- int parquetFieldIndex = 1;
+ boolean ignoreUnknownFields = conf.getBoolean("IGNORE_UNKNOWN_FIELDS",
false);
+
+ myBuilder = builder;
if (pvc == null) {
throw new IllegalStateException("Missing parent value container");
}
- myBuilder = builder;
+ if(builder == null && ignoreUnknownFields) {
Review Comment:
Change done.
> Allow Parquet to Proto conversion even though Target Schema has less fields
> ---------------------------------------------------------------------------
>
> Key: PARQUET-2305
> URL: https://issues.apache.org/jira/browse/PARQUET-2305
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-protobuf
> Reporter: Sanjay Sharma
> Priority: Major
>
> If Parquet has any field which has been removed from the schema and Parquet
> to Proto conversion happens, it errors out due to Unknown fields. There could
> be some scenarios that we want to still convert PARQUET into the target proto
> schema object which has lesser fields.
> If specified "ignoreUnknownFields" as an argument, this should allow the
> conversion which ignore fields it can't convert and not error out.
> Similar functionality exist in
> [https://github.com/protocolbuffers/protobuf/blob/main/java/util/src/main/java/com/google/protobuf/util/JsonFormat.java]
> with field "ignoringUnknownFields"
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