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f5aaeb712e
Derived from Dgraph (github.com/dgraph-io/dgraph) at commit 64804bd2, Apache-2.0. See NOTICE. WHAT THIS IS. The graph engine as a Go library: posting lists, the DQL parser, the type and tokenizer system, the index and schema layers, and the wire types. 39,170 lines of the upstream's 166,337. THE STORE is github.com/luxfi/zapdb, a Badger fork that kept the package name, the subpackages (options, pb, y) and the API — Open, OpenManaged, DB, Options — so the 74 import sites are aliased rather than rewritten. THE CODEC is ZAP. zapdb serializes with ZAP, not protobuf: its pb package builds the ZAP types by default and the protobuf ones only under `-tags grpc`, a path that does not compile (table/builder.go calls pb.Marshal, which that tag removes). One call site in posting needed converting; every other type here is Hanzo's own protobuf and is untouched. NO TRANSPORT. An embedded engine dials nothing, so nothing here imports google.golang.org/grpc. Removed: 20 transport functions in x, the generated service stubs for Raft, Zero and Worker (1,657 lines), and the JWT helper — identity belongs to IAM. The core called none of them. NOT KEPT: worker, conn, raftwal, the cluster commands, the GraphQL layer and the test harnesses. `query`, the DQL execution engine, went with them because it depends on worker; parsing DQL is available here, executing it is not. The history of the upstream project lives at github.com/dgraph-io/dgraph. This repository begins at the derivation because three quarters of that history describes code this fork does not carry.
51 lines
919 B
Go
51 lines
919 B
Go
/*
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* SPDX-FileCopyrightText: © 2017-2026 Istari Digital, Inc.
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* SPDX-License-Identifier: Apache-2.0
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*/
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package dql
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import (
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"github.com/dgraph-io/dgo/v250/protos/api"
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"github.com/hanzoai/graph/lex"
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)
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func ParseDQL(dqlQuery string) (*api.Request, error) {
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var lexer lex.Lexer
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lexer.Reset(dqlQuery)
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lexer.Run(lexTopLevel)
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if err := lexer.ValidateResult(); err != nil {
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return nil, err
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}
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it := lexer.NewIterator()
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if !it.Next() {
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return nil, it.Errorf("Invalid mutation")
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}
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item := it.Item()
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switch item.Typ {
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case itemUpsertBlock:
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it.Prev()
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return parseUpsertBlock(it)
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default:
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it.Next()
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item = it.Item()
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if item.Typ == itemMutationOp {
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it.Prev()
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it.Prev()
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mu, err := parseMutationBlock(it)
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if err != nil {
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return nil, err
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}
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return &api.Request{Mutations: []*api.Mutation{mu}}, nil
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}
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it.Prev()
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it.Prev()
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return &api.Request{Query: dqlQuery}, nil
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}
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}
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