avz / node-jl-sql-api Goto Github PK

Add INSERT and UPDATE keywords to allow to add and modify data on the json-lf datastore, just by adding new lines to the end of the file and in the case of the UPDATE keyword removing the old one first (so it would make sense to also implement a DELETE keyword and maybe some kind of transaction mechanism, so the UPDATE would be implemented as a DELETE + INSERT).

I would also add an option to set a limit in the file size, so if the about-to-write line makes the file to be bigger than this value (easy to implement by just having the current size of the file and the length of the line) just write it in a new file, maybe with an identifier at the end of its filename so later the two (or more) files could be loaded at the same time. The store of the register would check what file has enough space and select it, but maybe this would make it enough complex to make it its own module, isn't it?

Работает:

SELECT 1 + 2

Не работает:

SELECT 1+2

For now, aliases only accessible in HAVING:

SELECT a AS b HAVING b = 10

but not in WHERE or GROUP BY:

SELECT a AS b WHERE b = 10 # make empty result (undefined = 10)
SELECT a AS b GROUP BY b   # all rows groupping by same key value (undefined)

For single-level names:

SELECT * WHERE [:field] = 'value'

For multi-level names (paths):

SELECT * WHERE [::path] = 'value'

Combination

SELECT * WHERE field.[:subkey].[::subpath] = 'value'

How to insert? An example?