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C function called from BigQuery
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int sum(int a, int b) | |
{ | |
return a + b; | |
} |
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# https://twitter.com/felipehoffa/status/951951175250841600 | |
SELECT SUM(y), COUNT(*) FROM | |
js( | |
(SELECT FLOOR(RAND()*100) group, NEST(requests) as x FROM | |
(SELECT requests FROM [fh-bigquery:wikipedia.pagecounts_201205] LIMIT 10000000) | |
GROUP BY group), | |
group, x, | |
"[{name:'y', type: 'float'}]", | |
"function(row, emit) { | |
const x = row.x; | |
const memory = new WebAssembly.Memory({ initial: 256, maximum: 256 }); | |
const env = { | |
'abortStackOverflow': _ => { throw new Error('overflow'); }, | |
'table': new WebAssembly.Table({ initial: 0, maximum: 0, element: 'anyfunc' }), | |
'tableBase': 0, | |
'memory': memory, | |
'memoryBase': 1024, | |
'STACKTOP': 0, | |
'STACK_MAX': memory.buffer.byteLength, | |
}; | |
const importObject = { env }; | |
var bytes = new Uint8Array([0, 97, 115, 109, 1, 0, 0, 0, 1, 139, 128, 128, 128, 0, 2, 96, 1, 127, 0, 96, 2, 127, 127, 1, 127, 2, 254, 128, 128, 128, 0, 7, 3, 101, 110, 118, 8, 83, 84, 65, 67, 75, 84, 79, 80, 3, 127, 0, 3, 101, 110, 118, 9, 83, 84, 65, 67, 75, 95, 77, 65, 88, 3, 127, 0, 3, 101, 110, 118, 18, 97, 98, 111, 114, 116, 83, 116, 97, 99, 107, 79, 118, 101, 114, 102, 108, 111, 119, 0, 0, 3, 101, 110, 118, 6, 109, 101, 109, 111, 114, 121, 2, 1, 128, 2, 128, 2, 3, 101, 110, 118, 5, 116, 97, 98, 108, 101, 1, 112, 1, 0, 0, 3, 101, 110, 118, 10, 109, 101, 109, 111, 114, 121, 66, 97, 115, 101, 3, 127, 0, 3, 101, 110, 118, 9, 116, 97, 98, 108, 101, 66, 97, 115, 101, 3, 127, 0, 3, 130, 128, 128, 128, 0, 1, 1, 6, 147, 128, 128, 128, 0, 3, 127, 1, 35, 0, 11, 127, 1, 35, 1, 11, 125, 1, 67, 0, 0, 0, 0, 11, 7, 136, 128, 128, 128, 0, 1, 4, 95, 115, 117, 109, 0, 1, 9, 129, 128, 128, 128, 0, 0, 10, 196, 128, 128, 128, 0, 1, 190, 128, 128, 128, 0, 1, 7, 127, 2, 64, 35, 4, 33, 8, 35, 4, 65, 16, 106, 36, 4, 35, 4, 35, 5, 78, 4, 64, 65, 16, 16, 0, 11, 32, 0, 33, 2, 32, 1, 33, 3, 32, 2, 33, 4, 32, 3, 33, 5, 32, 4, 32, 5, 106, 33, 6, 32, 8, 36, 4, 32, 6, 15, 0, 11, 0, 11,]) | |
WebAssembly.instantiate(bytes, importObject).then(wa => { | |
const exports = wa.instance.exports; | |
var sum = exports._sum; | |
for (var i = 0, len = x.length; i < len; i++) { | |
emit({y: sum(x[0], x[0])}); | |
} | |
}); | |
} | |
") | |
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5 billion rows, 56 seconds: