It turns out this isn't hard, but in order for the JSON extension to be usable, it needs to be initialized when a connection is open. The final step (and for me, the trickiest) is to build pysqlite against the new static library. If not, cruise the console output and hopefully the error is easy to spot. There should now be a file named lib/libsqlite3.a in the SQLite3 source checkout. configure -prefix=$JQLITE -enable-static -disable-shared make sqlite3.c cat ext/misc/json1.c > sqlite3.c make lib_install I put mine in ~/bin/jqlite for fun, but you can change the path to whatever you like.Įxport CFLAGS="-fPIC -DSQLITE_ENABLE_FTS3=1 \ -DSQLITE_ENABLE_COLUMN_METADATA=1 \ -DSQLITE_ENABLE_UNLOCK_NOTIFY \ -DSQLITE_SECURE_DELETE \ -DSQLITE_ENABLE_LOAD_EXTENSION=1". To get started, we need a nice clean home for the new libraries. There were a couple steps involved, so I'll try and break it down into sub-steps. SQLite also requires tcl and awk to create the source amalgamation, so before starting in, you'll need to install:
#Sqlite to json code
We'll be grabbing the latest SQLite source code - to do this you can use fossil, the source-code management system used by SQLite, or alternatively you can pull down a compressed image. I've done this now on arch and ubuntu, but I'm not sure about fapple or windoze.
In this post, we'll build SQLite with the new JSON extension, then build pysqlite against the json-ready SQLite. Hipp posted to the sqlite-users mailing list requesting feedback for a draft of the json1 module APIs, so I thought the Python community might be able to help out.
#Sqlite to json how to
The post includes instructions for compiling pysqlite and apsw, as well as example code showing how to use these new extensions in your Python projects.Ī couple weeks ago, word started getting around trendy programming circles about a new file that had appeared in the SQLite fossil repo named json1.c. I've written a new version of this post with updated instructions for compiling SQLite with JSON1 and FTS5. All the JSON type and structure information is there if you need it, but you can also flatten an entire JSON object tree to a list of string-valued atoms in one swoop if that's what makes more sense.With the release of SQLite 3.9.0, the instructions for compiling SQLite and building pysqlite have been greatly simplified. I've found JSON1's table valued functions (JSON_EACH() and JSON_TREE()) in particular to be a very convenient and natural way (if calling out to SQL queries can be called natural.) to iterate over JSON structures from Tcl scripts. (Do note however that it's possible for the sqlite3 shell program to have a different set of extensions enabled than the C or Tcl libraries!) some (including recent Debian as of this writing) build their sqlite with JSON1 enabled by default.
#Sqlite to json manual
Probably good to check first before performing a manual installation on Linux/BSD/etc. Tar zxvf "sqlite-autoconf-$"ĬFLAGS='-DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_JSON1'.
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