There are 2 syntax highlighting bugs here, but these are not keyword highlighting issues. Both these items deal with the fact that the editor should color code any text inside of a double quote:

1) {"first"} --> if I have a curly brace followed immediately by a double quote, the contents inside the double quote do not get highlighted. They should.

2) [ "asdf" ] --> any double quoted content inside of a bracket does not get highlighted. It should.

To fix these issues, take a look at: SQLStdSyntax.parseToken()

Verified on ADS 14-beta-55.

For the cases mentioned on the description and commented by Sachin, the highlighting works fine. However I noticed discrepancy in following 2 scenarios:

a) {jkjlk"jkjlk"} 
b) [asdsa"jkaljfs"]

On (a), the part "jkjlk" does not get highlighted whereas on (b) "jkaljfs" does. Was expecting consistent behavior in both the cases.

We have decided to only support 

1) {"first"} --> if I have a curly brace followed immediately by a double quote, the contents inside the double quote do not get highlighted. They should.

but not:

2) [ "asdf" ] --> any double quoted content inside of a bracket does not get highlighted. It should.

I have re-opened this issue. Please check #10416 and #10460 for regression

Also note that  for [ {"asdf"} ], "asdf" will not be highlighted red.

Verified in ADS 14.0.1-4. Tested all the combinations mentioned in the issue with the below statement:

replace into students values (

{

  "_id"  : 200,

  "category"   : "kids",

  "name" : "potayu",

  "parentname" : {"first" : "Raj", "last" : "Shrestha" },

  "subs" : [ {"name" : "Humanities", "code" : "H101"} ],

  "mavs" : [ {"asdf"} ],

  "mavs_2" : ["asdf"],

  "mavs_3" : {jkjlk"jkjlk"} ,

  "mavs_4" : [asdsa"jkaljfs"],

}

) where _id >= 200

--1