cosmopolitan/tool/net/demo/sql-backup.lua

if GetAssetSize("backup.sqlite3") == nil then
    Write("no backup exists. call <a href='sql-backupstore.lua'>sql-backupstore.lua</a> first.")
    return
end

backup = sqlite3.open_memory()
buffer = LoadAsset("backup.sqlite3")
backup:deserialize(buffer)

-- insert more values
for i = 1, 250 do
  backup:exec("INSERT INTO test (content) VALUES ('Hello more')")
end

-- See .init.lua for CREATE TABLE setup.
for row in backup:nrows("SELECT * FROM test") do
   Write(row.id.." "..row.content.."<br>")
end
Proof of concept of sqlite serialization (#436) * Proof of concept of sqlite serialization This is a minimal proof of concept in order to show that it is easily possible to store the sqlite database within the zip file itself not requiring creating an external file first. Changes include compiling the sqlite library with the serialization flag, adding serialize/deserialize to the lua sqlite library and demonstrating the work via the redbean demo. * Change demo for sqlite serialization As explained in https://github.com/jart/cosmopolitan/pull/436#issuecomment-1164706893 the original use case is not possible with sqlite serialization, as an in-memory database cannot be shared across multiple processes. Thereby, this use case simply creates a backup of the in-memory database created in '.init.lua' and loads it to do a query. * Fix sqlite3_deserialize parameters The call to the sqlite3 library for the deserilization wasn't fully correct. This should fix the size parameters. 2022-10-05 16:09:53 +02:00			`if GetAssetSize("backup.sqlite3") == nil then`
			`Write("no backup exists. call <a href='sql-backupstore.lua'>sql-backupstore.lua</a> first.")`
			`return`
			`end`

			`backup = sqlite3.open_memory()`
			`buffer = LoadAsset("backup.sqlite3")`
			`backup:deserialize(buffer)`

Update SQLite deserialize to allow resizing restored DB (#701) Using either option (FREEONCLOSE or RESIZEABLE) requires using sqlite3_malloc. Ref. #436 2022-11-28 12:53:20 -08:00			`-- insert more values`
			`for i = 1, 250 do`
			`backup:exec("INSERT INTO test (content) VALUES ('Hello more')")`
			`end`

Proof of concept of sqlite serialization (#436) * Proof of concept of sqlite serialization This is a minimal proof of concept in order to show that it is easily possible to store the sqlite database within the zip file itself not requiring creating an external file first. Changes include compiling the sqlite library with the serialization flag, adding serialize/deserialize to the lua sqlite library and demonstrating the work via the redbean demo. * Change demo for sqlite serialization As explained in https://github.com/jart/cosmopolitan/pull/436#issuecomment-1164706893 the original use case is not possible with sqlite serialization, as an in-memory database cannot be shared across multiple processes. Thereby, this use case simply creates a backup of the in-memory database created in '.init.lua' and loads it to do a query. * Fix sqlite3_deserialize parameters The call to the sqlite3 library for the deserilization wasn't fully correct. This should fix the size parameters. 2022-10-05 16:09:53 +02:00			`-- See .init.lua for CREATE TABLE setup.`
			`for row in backup:nrows("SELECT * FROM test") do`
			`Write(row.id.." "..row.content.."<br>")`
Update SQLite deserialize to allow resizing restored DB (#701) Using either option (FREEONCLOSE or RESIZEABLE) requires using sqlite3_malloc. Ref. #436 2022-11-28 12:53:20 -08:00			`end`