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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.
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
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 x
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// ValueTypeInfo represents information about the type of values in DirectedEdge/Posting/N-Quad.
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type ValueTypeInfo int32
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// Type of a data inside DirectedEdge, Posting or N-Quad
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const (
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// ValueUnknown represents an unknown type of value.
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ValueUnknown ValueTypeInfo = iota
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// ValueEmpty represents a value with no UID and no value.
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ValueEmpty
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// ValueUid represents a value with an UID.
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ValueUid
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// ValuePlain represents a plain old value without defined language tag.
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ValuePlain
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// ValueMulti represents a value which is part of a multi-value posting list (like language).
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ValueMulti
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)
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// ValueType s a helper function to decide value type of DirectedEdge/Posting/N-Quad.
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func ValueType(hasValue, hasLang, hasSpecialId bool) ValueTypeInfo {
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switch {
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case hasValue && hasLang:
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return ValueMulti
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case hasValue && !hasLang:
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return ValuePlain
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case !hasValue && hasSpecialId:
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return ValueEmpty
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case !hasValue && !hasSpecialId:
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return ValueUid
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default:
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return ValueUnknown
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}
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}
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