Flex Index: Default Index: queries with arrays returns 0 results from FTS index

Build:7.0.0 build 2016

• Load dataset attached
• Create default fts index with keyword analyzer:

  {

  "type": "fulltext-index",

  "name": "default_index",

  "uuid": "5005f41409c983df",

  "sourceType": "gocbcore",

  "sourceName": "default",

  "sourceUUID": "b08aa384fdcd7adfdfe3569237428631",

  "planParams": {

  "maxPartitionsPerPIndex": 171

  },

  "params": {

  "doc_config": {

  "docid_prefix_delim": "",

  "docid_regexp": "",

  "mode": "type_field",

  "type_field": "type"

  },

  "mapping": {

  "analysis": {},

  "default_analyzer": "standard",

  "default_datetime_parser": "dateTimeOptional",

  "default_field": "_all",

  "default_mapping": {

  "default_analyzer": "keyword",

  "dynamic": true,

  "enabled": true

  },

  "default_type": "_default",

  "docvalues_dynamic": true,

  "index_dynamic": true,

  "store_dynamic": false,

  "type_field": "type"

  },

  "store": {

  "indexType": "scorch",

  "mossStoreOptions": {}

  }

  },

  "sourceParams": {}

  }

• Create GSI primary index
• For the below Flex queries, fts index is considered but returns 0 results but GSI do returns 71 results

  Number of results from flex query: select meta().id from default USE INDEX (USING FTS, USING GSI) where ANY v IN languages_known SATISFIES v = "Japanese" END is 0

  Number of results from gsi query: select meta().id from default USE INDEX (USING GSI) where ANY v IN languages_known SATISFIES v = "Japanese" END is 71

  Explain plan:

  {

  "#operator": "Sequence",

  "~children": [

  {

  "#operator": "IndexFtsSearch",

  "covers": [

  "cover (any `v` in (`default`.`languages_known`) satisfies (`v` = \"Japanese\") end)",

  "cover ((meta(`default`).`id`))"

  ],

  "index": "default_index",

  "index_id": "12b646a78c84ef13",

  "keyspace": "default",

  "namespace": "default",

  "search_info": {

  "field": "\"\"",

  "options": "{\"index\": \"default_index\"}",

  "outname": "out",

  "query": "{\"query\": {\"field\": \"languages_known\", \"term\": \"Japanese\"}, \"score\": \"none\"}"

  },

  "using": "fts"

  },

  {

  "#operator": "Parallel",

  "~child": {

  "#operator": "Sequence",

  "~children": [

  {

  "#operator": "Filter",

  "condition": "cover (any `v` in (`default`.`languages_known`) satisfies (`v` = \"Japanese\") end)"

  },

  {

  "#operator": "InitialProject",

  "result_terms": [

  {

  "expr": "cover ((meta(`default`).`id`))"

  }

  ]

  }

  ]

  }

  }

  ]

  }