diff --git a/lib/logstorage/filter.go b/lib/logstorage/filter.go
index 5a525897f..20e62a32d 100644
--- a/lib/logstorage/filter.go
+++ b/lib/logstorage/filter.go
@@ -2,9 +2,6 @@ package logstorage
 
 import (
 	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 )
 
 type filter interface {
@@ -62,27 +59,3 @@ func (fs *streamFilter) apply(bs *blockSearch, bm *bitmap) {
 		return
 	}
 }
-
-func toFloat64StringExt(bs *blockSearch, bb *bytesutil.ByteBuffer, v string) string {
-	if len(v) != 8 {
-		logger.Panicf("FATAL: %s: unexpected length for binary representation of floating-point number: got %d; want 8", bs.partPath(), len(v))
-	}
-	bb.B = toFloat64String(bb.B[:0], v)
-	return bytesutil.ToUnsafeString(bb.B)
-}
-
-func toIPv4StringExt(bs *blockSearch, bb *bytesutil.ByteBuffer, v string) string {
-	if len(v) != 4 {
-		logger.Panicf("FATAL: %s: unexpected length for binary representation of IPv4: got %d; want 4", bs.partPath(), len(v))
-	}
-	bb.B = toIPv4String(bb.B[:0], v)
-	return bytesutil.ToUnsafeString(bb.B)
-}
-
-func toTimestampISO8601StringExt(bs *blockSearch, bb *bytesutil.ByteBuffer, v string) string {
-	if len(v) != 8 {
-		logger.Panicf("FATAL: %s: unexpected length for binary representation of ISO8601 timestamp: got %d; want 8", bs.partPath(), len(v))
-	}
-	bb.B = toTimestampISO8601String(bb.B[:0], v)
-	return bytesutil.ToUnsafeString(bb.B)
-}
diff --git a/lib/logstorage/filter_phrase.go b/lib/logstorage/filter_phrase.go
index e34822f2e..fc396668e 100644
--- a/lib/logstorage/filter_phrase.go
+++ b/lib/logstorage/filter_phrase.go
@@ -6,6 +6,7 @@ import (
 	"sync"
 	"unicode/utf8"
 
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 )
 
@@ -292,3 +293,27 @@ func quoteFieldNameIfNeeded(s string) string {
 func isMsgFieldName(fieldName string) bool {
 	return fieldName == "" || fieldName == "_msg"
 }
+
+func toFloat64StringExt(bs *blockSearch, bb *bytesutil.ByteBuffer, v string) string {
+	if len(v) != 8 {
+		logger.Panicf("FATAL: %s: unexpected length for binary representation of floating-point number: got %d; want 8", bs.partPath(), len(v))
+	}
+	bb.B = toFloat64String(bb.B[:0], v)
+	return bytesutil.ToUnsafeString(bb.B)
+}
+
+func toIPv4StringExt(bs *blockSearch, bb *bytesutil.ByteBuffer, v string) string {
+	if len(v) != 4 {
+		logger.Panicf("FATAL: %s: unexpected length for binary representation of IPv4: got %d; want 4", bs.partPath(), len(v))
+	}
+	bb.B = toIPv4String(bb.B[:0], v)
+	return bytesutil.ToUnsafeString(bb.B)
+}
+
+func toTimestampISO8601StringExt(bs *blockSearch, bb *bytesutil.ByteBuffer, v string) string {
+	if len(v) != 8 {
+		logger.Panicf("FATAL: %s: unexpected length for binary representation of ISO8601 timestamp: got %d; want 8", bs.partPath(), len(v))
+	}
+	bb.B = toTimestampISO8601String(bb.B[:0], v)
+	return bytesutil.ToUnsafeString(bb.B)
+}