Apache Jackrabbit Oak 1.8 Lucene未索引聚合节点二进制属性求助

Hey there, let's dig into why your binary properties aren't showing up in your queries even though the mimeType is working perfectly! Based on your description, here are the most common culprits to check:

• You haven't explicitly included binary properties in your index configuration
  Most indexing setups don't automatically include binary properties by default. Double-check your index definition to make sure the binary property you're trying to query is listed in the includedProperties (or equivalent) section. For example, if you're targeting a file's content, your config might look like this:

  {
    "name": "file-node-index",
    "includedProperties": ["mimeType", "content"], // Ensure your binary property is here
    "queryable": true,
    "fulltextIndexed": true // If you need full-text search on binary content
  }
  

• Binary content extraction isn't enabled or configured
  If your binary property is actual file content (like text from a PDF, DOCX, or image OCR), your system needs a content extractor to convert that raw binary data into indexable text. Without this, the binary data is stored but not parsed into something the index can understand. Make sure you've enabled the appropriate extractors for the file types you're working with, and that they're linked to your index.

• Your query syntax for binary properties is incorrect
  Querying binary content often requires different syntax than standard properties. For example, instead of using a simple equality check (=) you might need a full-text search function like CONTAINS or MATCH. If you're using a query like:

  // Wrong approach for binary content
  MATCH (f:File) WHERE f.content = "specific text" RETURN f
  

  Try switching to a full-text compatible query instead (depending on your system):

  // Correct full-text query example
  MATCH (f:File) WHERE CONTAINS(f.content, "specific text") RETURN f
  

• You haven't rebuilt the index after updating the configuration
  If you added the binary property to your index config after creating the index, you'll need to trigger a full index rebuild. Most indexes don't retroactively index existing nodes when you add new properties—you have to tell the system to re-scan all file nodes and index the new binary data.

• Your binary data is in an unindexable format
  If the binary property is encrypted, uses a proprietary format, or is a type your indexer doesn't support (like a raw binary blob with no text content), the system can't parse it into indexable data. Verify that your binary files are in a format your indexer can process, or add custom parsing logic if needed.

Once you check these areas, you should be able to get your binary properties showing up in queries!

内容的提问来源于stack exchange，提问作者Andreas O.