#26327: JSON_AGG aggregate for PostgreSQL
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Reporter: tomaszn | Owner:
Type: New feature | Status: new
Component: contrib.postgres | Version:
Severity: Normal | Keywords: JSON postgres aggregate
Triage Stage: Unreviewed | Has patch: 1
Easy pickings: 0 | UI/UX: 0
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PostgreSQL 9.3 added many features for the JSON data type.
They include JSON_AGG aggregate, which could join its friends (ArrayAgg
and StringAgg) in django/contrib/postgres/aggregates/general.py, please
find draft implementation.
Function description: http://www.postgresql.org/docs/9.3/static/functions-
aggregate.html
Other (non-aggregate) functions and expressions could go to a new file,
maybe django/contrib/postgres/expressions.py? Please find attached
JSON_BUILD_OBJECT implementation. It takes an array of column names and
converts it to alternating key/value pairs for the function; the key is an
extracted column name. It works for me, but I guess the column name (the
key) should be somehow sanitized before appending to sql_expressions.
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Ticket URL: <https://code.djangoproject.com/ticket/26327>
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