How to insert/update a bunch of JSOB values?

On Mon, Jul 11, 2016 at 8:45 AM, Deven Phillips <deven.phillips@gmail.com>
wrote:

We need to update a JSONB data structure in our tables to include an
'is_valid' flag. I was able to build a CTE which I use to create a temp
table containing the 'is_valid' value, the path where it needs to be set,
and the join criteria. Let's say that the temp table looks like:

id TEXT,

time_inserted TIMESTAMPTZ,
path TEXT[],
is_valid BOOLEAN
PRIMARY KEY (id, time_inserted)

Let's say that the table with the data I want to modify has a JSONB
structure which needs to be updated in multiple paths:

{

"path1": {
"invalid_data": "here"
},
"path2: {
"valid_data": "here",
},...
}

For each path needing updates, I have a single entry in the temp table...
How do I structure the WITH..UPDATE..FROM query to apply all changes from
the temp table?

I've tried to use a simple case:

UPDATE target AS d SET data=jsonb_set(d.data, n.path, is_valid::JSONB,

true)
FROM temp_table n
WHERE d.time_inserted=n.time_inserted AND d.data->>'id'=n.id

But this results in just the first update for a given PK being applied.

Any assistance would be appreciated!!!

​This is a limitation of SQL-based processing.​

​You will probably need to use pl/pgsql and a loop here. Within the loop
you execute jsonb_set(...) once for each path on temp_table.
​

David J.