github/portmaster
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Better utilize database indexes for UNION selects

Browse Source
This commit is contained in:
Patrick Pacher
2023-06-14 09:48:16 +02:00
committed by Daniel
parent e9e9b54364
commit 135b68c008
1 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
netquery/query_handler.go
View File

@@ -190,11 +190,18 @@ func (req *QueryRequestPayload) generateSQL(ctx context.Context, schema *orm.Tab
}
selectClause := req.generateSelectClause()
query := `SELECT ` + selectClause + ` FROM ( SELECT *, 'memory' as _source FROM main.connections UNION SELECT *, 'history' as _source FROM history.connections) `
inMem := `SELECT *, 'live' as _source FROM main.connections `
inHistory := `SELECT *, 'history' as _source FROM history.connections `
if whereClause != "" {
query += " WHERE " + whereClause
inMem += " WHERE " + whereClause
inHistory += " WHERE " + whereClause
}
source := inMem + " UNION " + inHistory
query := `SELECT ` + selectClause + ` FROM ( ` + source + ` ) `
query += " " + groupByClause + " " + orderByClause + " " + req.Pagination.toSQLLimitOffsetClause()
return strings.TrimSpace(query), req.paramMap, nil
@@ -298,8 +305,7 @@ func (req *QueryRequestPayload) generateGroupByClause(schema *orm.TableSchema) (
func (req *QueryRequestPayload) generateSelectClause() string {
selectClause := "*"
if len(req.selectedFields) > 0 {
selectedFields := append(req.selectedFields, "_source")
selectClause = strings.Join(selectedFields, ", ")
selectClause = strings.Join(req.selectedFields, ", ")
}
return selectClause