Reuse temp table for trace ingest

Reusing the temp table will reduce catalog bloat and logging. No need to recreate it continuously.

Author: jgpruitt

pkg/pgmodel/ingestor/trace/writer.go

@@ -391,15 +391,15 @@ func (t *traceWriterImpl) insertRows(ctx context.Context, table string, columns
 		}
 	}()
 
-	if _, err = tx.Exec(ctx, fmt.Sprintf("CREATE TEMPORARY TABLE temp ON COMMIT DROP AS TABLE _ps_trace.%s WITH NO DATA", table)); err != nil {
+	if _, err = tx.Exec(ctx, fmt.Sprintf("CREATE TEMPORARY TABLE IF NOT EXISTS trace_writer_temp ON COMMIT DELETE ROWS AS TABLE _ps_trace.%s WITH NO DATA", table)); err != nil {
 		return err
 	}
 
 	if _, err = tx.CopyFrom(ctx, pgx.Identifier{"temp"}, columns, pgx.CopyFromRows(data)); err != nil {
 		return err
 	}
 
-	if _, err = tx.Exec(ctx, fmt.Sprintf("INSERT INTO _ps_trace.%s(%[2]s) SELECT %[2]s FROM temp ON CONFLICT DO NOTHING", table, strings.Join(columns, ","))); err != nil {
+	if _, err = tx.Exec(ctx, fmt.Sprintf("INSERT INTO _ps_trace.%s(%[2]s) SELECT %[2]s FROM trace_writer_temp ON CONFLICT DO NOTHING", table, strings.Join(columns, ","))); err != nil {
 		return err
 	}
 	return tx.Commit(ctx)