[receiver/mysql] feat: add table metrics

.chloggen/feat_table_stats.yaml

@@ -17,7 +17,7 @@ issues: [32693]
 # Use pipe (|) for multiline entries.
 subtext: |
   This adds table size metrics using the INFORMATION_SCHEMA TABLES table: https://dev.mysql.com/doc/refman/8.3/en/information-schema-tables-table.html. 
-  Specifically, we are adding the columns: `TABLE_ROWS`, `AVG_ROW_LENGTH`, `DATA_LENGTH`, `INDEX_LENGTH` and `TABLE_LENGTH` as the sum of `DATA_LENGTH` and `INDEX_LENGTH`.
+  Specifically, we are adding the columns: `TABLE_ROWS`, `AVG_ROW_LENGTH`, `DATA_LENGTH`, `INDEX_LENGTH`.
 
 
 # If your change doesn't affect end users or the exported elements of any package,

receiver/mysqlreceiver/client.go

@@ -63,7 +63,6 @@ type TableStats struct {
 	name             string
 	rows             int64
 	averageRowLength int64
-	totalLength      int64
 	dataLength       int64
 	indexLength      int64
 }
@@ -245,8 +244,7 @@ func (c *mySQLClient) getInnodbStats() (map[string]string, error) {
 // getTableStats queries the db for information_schema table size metrics.
 func (c *mySQLClient) getTableStats() ([]TableStats, error) {
 	query := "SELECT TABLE_SCHEMA, TABLE_NAME, TABLE_ROWS, " +
-		"AVG_ROW_LENGTH, data_length + index_length `TOTAL_LENGTH`, " +
-		"DATA_LENGTH, INDEX_LENGTH " +
+		"AVG_ROW_LENGTH, DATA_LENGTH, INDEX_LENGTH " +
 		"FROM information_schema.TABLES " +
 		"WHERE TABLE_SCHEMA NOT in ('information_schema', 'sys') " +
 		"ORDER BY TABLE_LENGTH DESC;"
@@ -260,7 +258,7 @@ func (c *mySQLClient) getTableStats() ([]TableStats, error) {
 		var s TableStats
 		err := rows.Scan(&s.schema, &s.name,
 			&s.rows, &s.averageRowLength,
-			&s.totalLength, &s.dataLength, &s.indexLength)
+			&s.dataLength, &s.indexLength)
 		if err != nil {
 			return nil, err
 		}

receiver/mysqlreceiver/documentation.md

@@ -534,36 +534,6 @@ The average row length in bytes for a given table.
 | table | Table name for event or process. | Any Str |
 | schema | The schema of the object. | Any Str |
 
-### mysql.table.data_length
-
-The data length in bytes for a given table.
-
-| Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
-| ---- | ----------- | ---------- | ----------------------- | --------- |
-| By | Sum | Int | Cumulative | false |
-
-#### Attributes
-
-| Name | Description | Values |
-| ---- | ----------- | ------ |
-| table | Table name for event or process. | Any Str |
-| schema | The schema of the object. | Any Str |
-
-### mysql.table.index_length
-
-The index length in bytes for a given table.
-
-| Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
-| ---- | ----------- | ---------- | ----------------------- | --------- |
-| By | Sum | Int | Cumulative | false |
-
-#### Attributes
-
-| Name | Description | Values |
-| ---- | ----------- | ------ |
-| table | Table name for event or process. | Any Str |
-| schema | The schema of the object. | Any Str |
-
 ### mysql.table.lock_wait.read.count
 
 The total table lock wait read events.
@@ -643,9 +613,9 @@ The number of rows for a given table.
 | table | Table name for event or process. | Any Str |
 | schema | The schema of the object. | Any Str |
 
-### mysql.table.total_length
+### mysql.table.size
 
-The total length (sum of data_length and index_length) in bytes for a given table.
+The table size in bytes for a given table.
 
 | Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
 | ---- | ----------- | ---------- | ----------------------- | --------- |
@@ -657,6 +627,7 @@ The total length (sum of data_length and index_length) in bytes for a given tabl
 | ---- | ----------- | ------ |
 | table | Table name for event or process. | Any Str |
 | schema | The schema of the object. | Any Str |
+| kind | The table size types. | Str: ``data``, ``index`` |
 
 ### mysql.table_open_cache