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https://github.com/ConnectedHumber/Air-Quality-Web
synced 2024-11-22 06:23:01 +00:00
Optimise some queries using the new datetime computed column, but there's more work to do.
The fetch-data query in particular is using the wrong index.
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1BE5172E637709C2
2 changed files with 21 additions and 47 deletions
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@ -53,12 +53,14 @@ class Database
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}
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public function query($sql, $variables = []) {
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// Replace tabs with spaces for debugging purposes
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$sql = str_replace("\t", " ", $sql);
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if($this->settings->get("env.mode") == "development")
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error_log("[Database/SQL] $sql");
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// FUTURE: Optionally cache prepared statements?
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// Note that we replace tabs with spaces for debugging purposes
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$statement = $this->connection->prepare(str_replace("\t", " ", $sql));
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$statement = $this->connection->prepare($sql);
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$statement->execute($variables);
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return $statement; // fetchColumn(), fetchAll(), etc. are defined on the statement, not the return value of execute()
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}
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@ -20,6 +20,11 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
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public static $column_metadata_id = "id";
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public static $column_metadata_storedon = "storedon";
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public static $column_metadata_recordedon = "recordedon";
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/**
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* A coaleasce of storedon and recorded on.
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* @var string
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*/
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public static $column_metadata_datetime = "datetime";
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public static $column_metadata_device_id = "device_id";
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public static $column_metadata_lat = "reading_latitude";
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public static $column_metadata_long = "reading_longitude";
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@ -78,26 +83,17 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
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{$s("table_name_values")}.{$s("column_values_reading_id")},
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{$s("table_name_metadata")}.{$s("column_metadata_device_id")},
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COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) AS datetime,
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{$s("table_name_metadata")}.{$s("column_metadata_datetime")} AS datetime,
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COUNT({$s("table_name_metadata")}.{$s("column_metadata_device_id")}) AS record_count
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FROM {$s("table_name_values")}
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JOIN {$s("table_name_metadata")} ON {$s("table_name_values")}.{$s("column_values_reading_id")} = {$s("table_name_metadata")}.id
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WHERE
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COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) >= :start_datetime AND
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COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) <= :end_datetime
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{$s("table_name_metadata")}.{$s("column_metadata_datetime")} >= :start_datetime AND
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{$s("table_name_metadata")}.{$s("column_metadata_datetime")} <= :end_datetime
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AND
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{$s("table_name_values")}.{$s("column_values_reading_type")} = :reading_type
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GROUP BY {$s("table_name_metadata")}.{$s("column_metadata_device_id")}
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ORDER BY {$s("table_name_metadata")}.{$s("column_metadata_recordedon")}
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ORDER BY {$s("table_name_metadata")}.{$s("column_metadata_datetime")}
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", [
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"reading_type" => $type_id,
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// The database likes strings, not PHP DateTime() instances
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@ -111,14 +107,8 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
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$s = $this->get_static;
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return $this->database->query(
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"SELECT
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MIN(COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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)) AS start,
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MAX(COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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)) AS end
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MIN({$s("table_name_metadata")}.{$s("column_metadata_datetime")}) AS start,
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MAX({$s("table_name_metadata")}.{$s("column_metadata_datetime")}) AS end
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FROM {$s("table_name_metadata")}
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WHERE {$s("table_name_metadata")}.{$s("column_metadata_device_id")} = :device_id;", [
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"device_id" => $device_id
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@ -135,10 +125,7 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
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AVG({$s("table_name_values")}.{$s("column_values_value")}) AS {$s("column_values_value")},
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MIN({$s("table_name_values")}.{$s("column_values_reading_id")}) AS {$s("column_values_reading_id")},
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MIN(COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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)) AS datetime
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MIN({$s("table_name_metadata")}.{$s("column_metadata_datetime")}) AS datetime
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FROM {$s("table_name_values")}
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JOIN {$s("table_name_metadata")} ON
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{$s("table_name_metadata")}.{$s("column_metadata_id")} = {$s("table_name_values")}.{$s("column_values_reading_id")}
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@ -146,18 +133,9 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
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{$s("table_name_metadata")}.{$s("column_metadata_device_id")} = :device_id AND
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{$s("table_name_values")}.{$s("column_values_reading_type")} = :reading_type AND
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COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) >= :start_datetime AND
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COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) <= :end_datetime
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GROUP BY CEIL(UNIX_TIMESTAMP(COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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)) / :average_seconds);", [
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{$s("table_name_metadata")}.{$s("column_metadata_datetime")} >= :start_datetime AND
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{$s("table_name_metadata")}.{$s("column_metadata_datetime")} <= :end_datetime
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GROUP BY CEIL(UNIX_TIMESTAMP({$s("table_name_metadata")}.{$s("column_metadata_datetime")}) / :average_seconds);", [
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"device_id" => $device_id,
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"reading_type" => $type_id,
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"start_datetime" => $start->format(\DateTime::ISO8601),
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@ -176,20 +154,14 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
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{$s("table_name_values")}.{$s("column_values_value")} AS {$s("column_values_value")},
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{$s("table_name_values")}.{$s("column_values_reading_id")} AS {$s("column_values_reading_id")},
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COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) AS datetime
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{$s("table_name_metadata")}.{$s("column_metadata_datetime")} AS datetime
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FROM {$s("table_name_values")}
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JOIN {$s("table_name_metadata")} ON
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{$s("table_name_metadata")}.{$s("column_metadata_id")} = {$s("table_name_values")}.{$s("column_values_reading_id")}
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WHERE
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{$s("table_name_metadata")}.{$s("column_metadata_device_id")} = :device_id AND
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{$s("table_name_values")}.{$s("column_values_reading_type")} = :reading_type
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ORDER BY COALESCE(
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{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
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{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
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) DESC
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ORDER BY {$s("table_name_metadata")}.{$s("column_metadata_datetime")} DESC
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LIMIT :count;", [
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"device_id" => $device_id,
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"reading_type" => $type_id,
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