sqlite-json1 | 易学教程

Loading JSON1 extension with flutter sqflite

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问题 In my flutter app I'm using sqflite to talk to a local database. I need to peek into json data for specific queries. The JSON1 extension would be ideal for this. However, I can't find how to load the extension in a flutter app, making it available in my queries, since the documentation for loading the extension is written for C language, not Dart. So, some questions to help me on the way: Should I compile in different architectures for iOS and Android? Where should the compiled file(s) be

Loading JSON1 extension with flutter sqflite

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Python - SQLite JSON1 load extension

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问题 I want to use the json1 extension for SQLite within Python. According to the official documentation, it should be a loadable extension. I got the json1.c file from the source and compiled it into json1.so as per the official instructions without any errors. $ gcc -g -fPIC -shared json1.c -o json1.so The trouble came up when I tried to load the extension in Python 2.7.12 (and 3.5.2) according to the sqlite3 documentation. >>> import sqlite3 >>> con = sqlite3.connect(":memory:") >>> con.enable

SQLite JSON1 example for JSON extract\\set

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SQLite has now an experimental JSON1 extension to work with JSON fields. The functions to choose from look promising, but I don't get how to use them in the context of a query. Suppose I created the following table: sqlite> create table user(name,phone); sqlite> insert into user values('oz', json_array(['+491765','+498973'])); The documentation shows how to use json_each in a query, but all other functions lack some in context documentation. Can someone with SQLite experience provide a few examples of how to use: json_extract json_set So, here is a first example of how to use json_extract .