[MM-24088] Use Raw SQL query for PluginStore.Get instead of GORP (#14650)

* Use Raw SQL query instead of GORP

As part of performance improvements we're moving the top
used queries to avoid using gorp and get rid of the overhead
caused by the reflection usage

store/sqlstore/plugin_store.go

@@ -9,6 +9,8 @@ import (
 	"fmt"
 	"net/http"
 
+	sq "github.com/Masterminds/squirrel"
+
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/store"
 )
@@ -219,16 +221,37 @@ func (ps SqlPluginStore) SetWithOptions(pluginId string, key string, value []byt
 }
 
 func (ps SqlPluginStore) Get(pluginId, key string) (*model.PluginKeyValue, *model.AppError) {
-	var kv *model.PluginKeyValue
 	currentTime := model.GetMillis()
-	if err := ps.GetReplica().SelectOne(&kv, "SELECT * FROM PluginKeyValueStore WHERE PluginId = :PluginId AND PKey = :Key AND (ExpireAt = 0 OR ExpireAt > :CurrentTime)", map[string]interface{}{"PluginId": pluginId, "Key": key, "CurrentTime": currentTime}); err != nil {
-		if err == sql.ErrNoRows {
-			return nil, model.NewAppError("SqlPluginStore.Get", "store.sql_plugin_store.get.app_error", nil, fmt.Sprintf("plugin_id=%v, key=%v, err=%v", pluginId, key, err.Error()), http.StatusNotFound)
-		}
-		return nil, model.NewAppError("SqlPluginStore.Get", "store.sql_plugin_store.get.app_error", nil, fmt.Sprintf("plugin_id=%v, key=%v, err=%v", pluginId, key, err.Error()), http.StatusInternalServerError)
+
+	failure := func(err error, statusCode int) *model.AppError {
+		return model.NewAppError(
+			"SqlPluginStore.Get",
+			"store.sql_plugin_store.get.app_error",
+			nil,
+			fmt.Sprintf("plugin_id=%v, key=%v, err=%v", pluginId, key, err.Error()),
+			statusCode,
+		)
 	}
 
-	return kv, nil
+	query := ps.getQueryBuilder().Select("PluginId, PKey, PValue, ExpireAt").
+		From("PluginKeyValueStore").
+		Where(sq.Eq{"PluginId": pluginId}).
+		Where(sq.Eq{"PKey": key}).
+		Where(sq.Or{sq.Eq{"ExpireAt": 0}, sq.Gt{"ExpireAt": currentTime}})
+	queryString, args, err := query.ToSql()
+	if err != nil {
+		return nil, failure(err, http.StatusInternalServerError)
+	}
+	row := ps.GetReplica().Db.QueryRow(queryString, args...)
+	var kv model.PluginKeyValue
+	if err := row.Scan(&kv.PluginId, &kv.Key, &kv.Value, &kv.ExpireAt); err != nil {
+		if err == sql.ErrNoRows {
+			return nil, failure(err, http.StatusNotFound)
+		}
+		return nil, failure(err, http.StatusInternalServerError)
+	}
+
+	return &kv, nil
 }
 
 func (ps SqlPluginStore) Delete(pluginId, key string) *model.AppError {