memgraph-d 0.0.5
D bindings for the memgraph DB
To use this package, run the following command in your project's root directory:
Manual usage
Put the following dependency into your project's dependences section:
memgraph-d
D bindings for the memgraph DB
Memgraph DB is © Memgraph Ltd., see https://memgraph.com
Please note that all structs are only thin wrappers around the native mg_* types and that no copying or allocations are being made.
Example
import std.stdio, std.conv;
import memgraph;
int main() {
auto client = Client.connect();
if (!client) {
writefln("Failed to connect: %s", client.status);
return 1;
}
if (!client.run("CREATE INDEX ON :Person(id);")) {
writefln("Failed to create index: %s %s", client.status, client.error);
return 1;
}
if (!client.run("CREATE (:Person:Entrepreneur {id: 0, age: 40, name: 'John', " ~
"isStudent: false, score: 5.0});")) {
writefln("Failed to add data: %s %s", client.status, client.error);
return 1;
}
auto results = client.execute("MATCH (n) RETURN n;");
foreach (r; results)
writefln("%s", r[0]);
writefln("Summary: %s", results.summary);
writefln("Columns: %s", results.columns);
return 0;
}
Output
Person:Entrepreneur {score:5 age:40 id:0 isStudent:false name:John}
Summary: {cost_estimate:1 type:r planning_time:0.000198 has_more:false plan_execution_time:0.000329302 parsing_time:4.0088e-05}
Columns: ["n"]
Prerequisites
To run the examples or the unit tests, a local Docker installation is required. Install Docker as appropriate for your platform.
docker pull memgraph/memgraph
Then start a local memgraph container with e.g.:
docker run -p 7687:7687 --name memgraph memgraph/memgraph --also-log-to-stderr --log-level=DEBUG
subsequently:
docker start memgraph
Building the library
dub build
This will pull the mgclient
C interface for memgraph as a git submodule and build it locally.
Please refer to https://github.com/memgraph/mgclient for the build requirements.
Building the examples
This package contains two examples that were adapted from the examples contained in the mgclient
C interface library.
cd examples/basic
dub build
./run.sh
cd examples/advanced
dub build
./advanced 127.0.0.1 7687
Generate local documentation
dub build -b ddox
Run unittests and generate coverage data
dub test -b unittest-cov
Some useful commands
Start mgconsole via docker
IP=`docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' memgraph`
docker run -it --entrypoint=mgconsole memgraph/memgraph --host $IP --use-ssl=False
Use mgconsole to run a cypher script
docker run -i --entrypoint=mgconsole memgraph/memgraph --host $IP --use-ssl=False -output_format=csv < script.cql
History
- v0.0.5 Reduced number of memory allocations by ~95%, added proper pagination when fetching results,
using native D temporal types, @nogc where possible and many more small improvements.
- 0.0.5 released 2 years ago
- sinisa-susnjar/memgraph-d
- MIT
- Copyright © 2022, Sinisa Susnjar
- Authors:
- Dependencies:
- none
- Versions:
-
0.0.6 2023-Feb-11 0.0.5 2022-Jan-13 0.0.4 2021-Sep-30 0.0.3 2021-Sep-28 0.0.2 2021-Aug-13 - Download Stats:
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- Score:
- 0.8
- Short URL:
- memgraph-d.dub.pm