WebMay 19, 2024 · Short answer, no. We cannot use spread operator on array of object to access elements. As @VLAZ said in a comment. Spreading doesn't work like mapping at all. So...no, you cannot make it work like mapping. Share. Follow. edited May 19, 2024 at 7:54. answered May 19, 2024 at 7:48. user15873596. WebMar 18, 2024 · Here I use the 'slot' function to extract the list from the class object then subset out the sub-lists desired. However, I would be interested to know how to access (point to) these sub-list more directly for such a class list, rather than extracting the list then sub-setting the list.
JSON Functions and Operators — Presto 0.280 Documentation
WebAug 18, 2011 · I have an object which contains an array of any type (not a priory known type. So I cannot a simple cast in the code because I can determine the type just in the run-time!). How can I extract the content of array? For example: int[] array = new int[] { 0, 1, 2 }; object obj=array; ... WebI created a query to do this: SELECT DISTINCT json_object_keys (j) FROM t; Where t is the table and j is the JSON column. This worked on a small set of data correctly, it would list all the keys that exist in j, without repeating them. However, after adding a lot more data, it doesn't work anymore, giving the error: ERROR: cannot call json ... how to save mountain gorillas
Azure data factory get object properties from array
WebExtract json array from postgres table gives error: cannot extract elements from a scalar; cannot extract elements from a scalar; Cannot extract element from a scalar - postgresql error; PG::InvalidParameterValue: ERROR: cannot extract element from a scalar; Cannot extract field from a non-object, Postgres json array WebJun 19, 2024 · I cannot get your question, after 2 times reading. PSObject[] type mean that you have array of PSObjects (more then 1 elements inside your variable). Rich desribed … WebJul 24, 2024 · [22024] ERROR: cannot extract element from a scalar. when I use desc order. When I use asc the query does not fail and at least first 500 records ... (because of faulty backend). So instead of normal json object: {} the values is a quoted object string "{}". Detected by the following query: select data from some_table where data::text not like ... how to save movies in laptop