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ClickHouse: Made tags optional and adjusted TABLE creation for newer version #237

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ClickHouse: Made tags optional and adjusted TABLE creation for newer version #237

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ClickHouse: Made tags optional and adjusted TABLE creation for newer …
MoellJ Aug 24, 2023
dddc2a0
Update creator_test.go
MoellJ Aug 31, 2023
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1 change: 1 addition & 0 deletions cmd/tsbs_load_clickhouse/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,7 @@ func init() {
Password: viper.GetString("password"),
LogBatches: viper.GetBool("log-batches"),
Debug: viper.GetInt("debug"),
InTableTag: viper.GetBool("in-table-partition-tag"),
DbName: loaderConf.DBName,
}

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14 changes: 10 additions & 4 deletions pkg/targets/clickhouse/creator.go
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Expand Up @@ -127,12 +127,17 @@ func createMetricsTable(conf *ClickhouseConfig, db *sqlx.DB, tableName string, f

// columnsWithType - column specifications with type. Ex.: "cpu_usage Float64"
var columnsWithType []string
for _, column := range columnNames {
for idx, column := range columnNames {
if len(column) == 0 {
// Skip nameless columns
continue
}
columnsWithType = append(columnsWithType, fmt.Sprintf("%s Nullable(Float64)", column))
if conf.InTableTag && idx == 0 {
columnsWithType = append(columnsWithType, fmt.Sprintf("%s Nullable(String)", column))
} else {
columnsWithType = append(columnsWithType, fmt.Sprintf("%s Nullable(Float64)", column))
}

}

sql := fmt.Sprintf(`
Expand All @@ -143,7 +148,7 @@ func createMetricsTable(conf *ClickhouseConfig, db *sqlx.DB, tableName string, f
tags_id UInt32,
%s,
additional_tags String DEFAULT ''
) ENGINE = MergeTree(created_date, (tags_id, created_at), 8192)
) ENGINE = MergeTree() PARTITION BY toYYYYMM(created_date) PRIMARY KEY (tags_id, created_at)
`,
tableName,
strings.Join(columnsWithType, ","))
Expand Down Expand Up @@ -180,7 +185,8 @@ func generateTagsTableQuery(tagNames, tagTypes []string) string {
"created_at DateTime DEFAULT now(),\n"+
"id UInt32,\n"+
"%s"+
") ENGINE = MergeTree(created_date, (%s), 8192)",
") ENGINE = MergeTree()"+
"PARTITION BY toYYYYMM(created_date) PRIMARY KEY %s",
cols,
index)
}
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4 changes: 2 additions & 2 deletions pkg/targets/clickhouse/creator_test.go
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Expand Up @@ -18,7 +18,7 @@ func TestGenerateTagsTableQuery(t *testing.T) {
"created_at DateTime DEFAULT now(),\n" +
"id UInt32,\n" +
"tag1 Nullable(String)" +
") ENGINE = MergeTree(created_date, (id), 8192)"}, {
") ENGINE = MergeTree()PARTITION BY toYYYYMM(created_date) PRIMARY KEY id"}, {
inTagNames: []string{"tag1", "tag2", "tag3", "tag4"},
inTagTypes: []string{"int32", "int64", "float32", "float64"},
out: "CREATE TABLE tags(\n" +
Expand All @@ -29,7 +29,7 @@ func TestGenerateTagsTableQuery(t *testing.T) {
"tag2 Nullable(Int64),\n" +
"tag3 Nullable(Float32),\n" +
"tag4 Nullable(Float64)" +
") ENGINE = MergeTree(created_date, (id), 8192)"},
") ENGINE = MergeTree()PARTITION BY toYYYYMM(created_date) PRIMARY KEY id"},
}
for _, tc := range testCases {
t.Run(fmt.Sprintf("tags table for %v", tc.inTagNames), func(t *testing.T) {
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1 change: 1 addition & 0 deletions pkg/targets/clickhouse/implemented_target.go
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Expand Up @@ -30,6 +30,7 @@ func (c clickhouseTarget) TargetSpecificFlags(flagPrefix string, flagSet *pflag.
flagSet.String(flagPrefix+"password", "", "Password to connect to ClickHouse")
flagSet.Bool(flagPrefix+"log-batches", false, "Whether to time individual batches.")
flagSet.Int(flagPrefix+"debug", 0, "Debug printing (choices: 0, 1, 2). (default 0)")
flagSet.Bool(flagPrefix+"in-table-partition-tag", false, "Whether the partition key (e.g. hostname) should also be in the metrics hypertable")
}

func (c clickhouseTarget) TargetName() string {
Expand Down