json-search | Asynchronous full text indexing | Search Engine library
kandi X-RAY | json-search Summary
kandi X-RAY | json-search Summary
JSON Search is an asynchronous full text indexing and searching library written in JavaScript, and is based off Lucene. JSON Search is still a work in progress, but is currently fully functional and supports almost all of the core features of Lucene. It is sorely lacking documentation and unit tests, but you can get a good sense of what it can do by looking at the files in the src directory.
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Community Discussions
Trending Discussions on json-search
QUESTION
My goal is how to get a relation between a column that have references in a json array to other one. In a simplified way, I have two tables:
...ANSWER
Answered 2020-Nov-10 at 09:26Incorrect (but checked successfully by JSON_VALID function) JSON.
The solution is monstrous:
QUESTION
I have developed a package to enable search method on Eloquent models with JSON.
The engine currently works in a way that a query is appended for supported parameters depending on values provided.
...ANSWER
Answered 2020-Aug-22 at 05:49After a lot of research of Laravel inner workings, what I asked initially isn't possible.
At the point where you call the method to interact with DB in some way, a query builder instance is made and depending on the method you called on the original model, the query is formed. After execution there is nothing to tap into as the object no longer exists.
Also, from the logical point of view, I have concluded that search
makes no sense on already loaded models, so I did a concept switch there and disabled the package for already loaded models.
QUESTION
I've got MySQL table with JSON field, where I store data in such a format.
...ANSWER
Answered 2020-Feb-18 at 05:06Try FOR ORDINALITY
(see 12.17.6 JSON Table Functions), this type enumerates rows in the COLUMNS clause:
QUESTION
I have a JSON block where a property is a number. For example {"123": "1"}
. But I can't seem to get it to work with MySQL's JSON_CONTAINS function. I also tried the JSON_CONTAINS_PATH function with the same result.
The following works:
...ANSWER
Answered 2020-Jan-31 at 21:42You can use the following double-quote the key name:
QUESTION
I'm playing with MySQL 8's new JSON capabilities, in particular multi-value indexes.
I noticed that there are 2 ways to check if a JSON array contains a given value: the MEMBER OF() operator, and the JSON_CONTAINS() function.
They both return the same set of results for every query I make, but surprisingly, MEMBER OF
seems to be 3x faster than JSON_CONTAINS
.
Example on a table with 200,000 records, with around 700,000 values total in the catIds
fields:
ANSWER
Answered 2019-Dec-31 at 00:22JSON_CONTAINS()
does more complex work than MEMBER OF
.
JSON_CONTAINS()
must parse its second argument, a candidate JSON document that you're searching for within the stored JSON document.
The candidate may not be a simple scalar as you're searching for in your example above. It could be a more complex document with its own nested arrays and objects.
Therefore comparing the candidate to the stored document must potentially compare in a more complex manner, not just searching for a single scalar value, but comparing recursively, all nested elements.
Even if your example search is for a simple scalar value, it still invokes the same code path that might need to search for a complex document. Based on your timing measurement, that code path seems to have more overhead.
Whereas MEMBER OF
only searches for a scalar value, and only searches in an array. It can also optimize by using a cached, pre-sorted array.
See https://github.com/mysql/mysql-server/blob/8.0/sql/item_json_func.cc#L3852 for the code.
QUESTION
I have two columns from different tables that hold JSON-formatted data. The data stored in both columns are arrays. Example:
users
ANSWER
Answered 2019-Nov-27 at 14:08How to emulate JSON_OVERLAPS function on MySQL 5.7?
Edit: Unfortunately, upgrading to MySQL 8 is not an option since we run MariaDB on production, which also doesn't have that function.
Be warned like Strawberry, suggested already upgrading is more easy
Now that is out off the way. You still asked for it, lets have some fun.
I posted some answers in the past to simulate MySQL's 8 JSON_TABLE()
, why did i mention this? Because i use this method to emulate MySQL's 8 JSON_OVERLAPS
to simply JOIN both resultsets which emulate JSON_TABLE()
to a final resultset
Which makes the query below (forgive the formatting)
Query
QUESTION
In MySQL 8, we can now use a JSON typed column and also use built-in functions like JSON_TABLE() but as I'm using in different scenarios sometimes I see results I did not expect.
Docs for JSON_TABLE() : https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html
Maybe JSON_TABLE is not the way to accomplish joining with a piece of JSON. There are some search functions MySQL provides, but nothing jumped out at me as an alternative to JSON_TABLE()
Docs for JSON search functions: https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html
Schema (MySQL v8.0)
...ANSWER
Answered 2019-Nov-12 at 10:27Use ISNULL
property to create dummy json
QUESTION
I have an array of JSON objects and want to have a specific node returned. To simplify my problem, lets say the array could look like this:
...ANSWER
Answered 2019-Apr-23 at 13:22Look at JSON_CONTAINS (https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-contains) and us it in your WHERE clause to identify the records that match your criteria.
QUESTION
I am using XAMPP for Linux 5.6.30 and MySQL version is 10.1.21-MariaDB
I have one table 'employee'
...ANSWER
Answered 2017-May-16 at 04:25The function JSON_EXTRACT
in maria db is available since version 10.2.3,
you can read the documentation here.
You have to update your maria db installation to use that function.
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