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feat: enable prefilter in node js (#675)

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enable prefiltering in node js, both native and remote
This commit is contained in:
Rob Meng
2023-12-01 16:49:10 -05:00
committed by GitHub
parent a2a8f9615e
commit 72765d8e1a
5 changed files with 30 additions and 3 deletions
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14
node/src/test/test.ts
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@@ -102,6 +102,20 @@ describe('LanceDB client', function () {
assertResults(results)
})
it('should correctly process prefilter/postfilter', async function () {
const uri = await createTestDB(16, 300)
const con = await lancedb.connect(uri)
const table = await con.openTable('vectors')
await table.createIndex({ type: 'ivf_pq', column: 'vector', num_partitions: 2, max_iters: 2, num_sub_vectors: 2 })
// post filter should return less than the limit
let results = await table.search(new Array(16).fill(0.1)).limit(10).filter('id >= 10').prefilter(false).execute()
assert.isTrue(results.length < 10)
// pre filter should return exactly the limit
results = await table.search(new Array(16).fill(0.1)).limit(10).filter('id >= 10').prefilter(true).execute()
assert.isTrue(results.length === 10)
})
it('select only a subset of columns', async function () {
const uri = await createTestDB()
const con = await lancedb.connect(uri)