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* feat: support json type * feat: add readme * feat: add json type test * fix: ci failed * chore: revert package import
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| # Insert data into GreptimeDB | ||
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| ## Insert | ||
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| ```go | ||
| go run main.go | ||
| ``` | ||
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| Output: | ||
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| ```log | ||
| 2024/11/11 14:59:56 affected rows: 1 | ||
| ``` | ||
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| ## Query | ||
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| Your can using [MySQL Client](https://docs.greptime.com/user-guide/protocols/mysql) to query the data from GreptimeDB. | ||
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| ```shell | ||
| $ mysql -h 127.0.0.1 -P 4002 | ||
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| mysql> select * from json_data; | ||
| +-----------------------------------------------------------------------------------------+----------------------------+ | ||
| | my_json | timestamp | | ||
| +-----------------------------------------------------------------------------------------+----------------------------+ | ||
| | {"Age":25,"Courses":["math","history","chemistry"],"IsStudent":false,"Name":"Jain Doe"} | 2024-11-11 06:59:56.340132 | | ||
| +-----------------------------------------------------------------------------------------+----------------------------+ | ||
| 1 row in set (0.04 sec) | ||
| ``` | ||
| You can view table fields using `show create table` command: | ||
| ```mysql | ||
| mysql> show create table json_data; | ||
| +-----------+-------------------------------------------------------------------------------------------------------------------------------------------------+ | ||
| | Table | Create Table | | ||
| +-----------+-------------------------------------------------------------------------------------------------------------------------------------------------+ | ||
| | json_data | CREATE TABLE IF NOT EXISTS `json_data` ( | ||
| `my_json` JSON NULL, | ||
| `timestamp` TIMESTAMP(6) NOT NULL, | ||
| TIME INDEX (`timestamp`) | ||
| ) | ||
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| ENGINE=mito | ||
| | | ||
| +-----------+-------------------------------------------------------------------------------------------------------------------------------------------------+ | ||
| 1 row in set (0.00 sec) | ||
| ``` |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| // Copyright 2024 Greptime Team | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| package main | ||
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| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "log" | ||
| "time" | ||
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| greptime "github.com/GreptimeTeam/greptimedb-ingester-go" | ||
| "github.com/GreptimeTeam/greptimedb-ingester-go/table" | ||
| "github.com/GreptimeTeam/greptimedb-ingester-go/table/types" | ||
| ) | ||
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| const ( | ||
| // The GreptimeDB address. | ||
| host = "127.0.0.1" | ||
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| // The database name. | ||
| database = "public" | ||
| ) | ||
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| type Person struct { | ||
| Name string | ||
| Age int | ||
| IsStudent bool | ||
| Courses []string | ||
| } | ||
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| type client struct { | ||
| client *greptime.Client | ||
| } | ||
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| func newClient() (*client, error) { | ||
| cfg := greptime.NewConfig(host).WithDatabase(database) | ||
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| gtClient, err := greptime.NewClient(cfg) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| c := &client{ | ||
| client: gtClient, | ||
| } | ||
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| return c, nil | ||
| } | ||
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| func main() { | ||
| c, err := newClient() | ||
| if err != nil { | ||
| log.Fatalf("failed to new client: %v:", err) | ||
| } | ||
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| data, err := initData() | ||
| if err != nil { | ||
| log.Fatalf("failed to init data: %v:", err) | ||
| } | ||
| if err = c.write(data[0]); err != nil { | ||
| log.Fatalf("failed to write data: %v:", err) | ||
| } | ||
| } | ||
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| func initData() ([]*table.Table, error) { | ||
| time1 := time.Now() | ||
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| itbl, err := table.New("json_data") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| p := Person{ | ||
| Name: "Jain Doe", | ||
| Age: 25, | ||
| IsStudent: false, | ||
| Courses: []string{"math", "history", "chemistry"}, | ||
| } | ||
| jsonData, err := json.Marshal(p) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| // add column at first. This is to define the schema of the table. | ||
| if err := itbl.AddFieldColumn("my_json", types.JSON); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := itbl.AddTimestampColumn("timestamp", types.TIMESTAMP_MICROSECOND); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := itbl.AddRow(string(jsonData), time1); err != nil { | ||
| return nil, err | ||
| } | ||
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| return []*table.Table{itbl}, nil | ||
| } | ||
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| func (c client) write(data *table.Table) error { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Second*3) | ||
| defer cancel() | ||
| resp, err := c.client.Write(ctx, data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| log.Printf("affected rows: %d\n", resp.GetAffectedRows().GetValue()) | ||
| return nil | ||
| } |
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