FlexIndex: FTS index not sargable for the predicates with like operator for matches with .%

Build: 7.0.0-1834

• Load dataset attached
• Create fts index where languages_known is an array element with below:

  {

  "type": "fulltext-index",

  "name": "custom_index",

  "uuid": "799ddfc7c9960031",

  "sourceType": "gocbcore",

  "sourceName": "default",

  "sourceUUID": "5e6b524d1d75add5e112fa78ac6caffd",

  "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": {

  "dynamic": true,

  "enabled": false

  },

  "default_type": "_default",

  "docvalues_dynamic": true,

  "index_dynamic": true,

  "store_dynamic": false,

  "type_field": "type",

  "types": {

  "emp": {

  "dynamic": false,

  "enabled": true,

  "properties": {

  "email": {

  "dynamic": false,

  "enabled": true,

  "fields": [

  {

  "analyzer": "keyword",

  "include_in_all": true,

  "include_term_vectors": true,

  "index": true,

  "name": "email",

  "type": "text"

  }

  ]

  },

  "join_date": {

  "dynamic": false,

  "enabled": true,

  "fields": [

  {

  "include_in_all": true,

  "include_term_vectors": true,

  "index": true,

  "name": "join_date",

  "type": "datetime"

  }

  ]

  },

  "manages": {

  "dynamic": false,

  "enabled": true,

  "properties": {

  "reports": {

  "dynamic": false,

  "enabled": true,

  "fields": [

  {

  "analyzer": "keyword",

  "include_in_all": true,

  "include_term_vectors": true,

  "index": true,

  "name": "reports",

  "type": "text"

  }

  ]

  }

  }

  }

  }

  }

  }

  },

  "store": {

  "indexType": "scorch",

  "mossStoreOptions": {}

  }

  },

  "sourceParams": {}

  }

• Create GSI primary index
• For the below Flex query with .%, fts index is not considered.

  select meta().id from default USE INDEX (custom_index USING FTS) where type = "emp" and email like "devi@mcdiabetes.%"