diff --git a/internal/s3select/select_test.go b/internal/s3select/select_test.go
index c2fea80f5..c46183ebb 100644
--- a/internal/s3select/select_test.go
+++ b/internal/s3select/select_test.go
@@ -794,6 +794,14 @@ func TestCSVQueries2(t *testing.T) {
 			query:      `select * from S3object where _2 IS NOT ''`,
 			wantResult: `{"c1":"1","c2":"2","c3":"3"}`,
 		},
+		{
+			name: "select-is_not_string",
+			input: []byte(`c1,c2,c3
+1,2,3
+1,,3`),
+			query:      `select * from S3object where _2 != '' AND _2 > 1`,
+			wantResult: `{"c1":"1","c2":"2","c3":"3"}`,
+		},
 	}
 
 	defRequest := `<?xml version="1.0" encoding="UTF-8"?>
diff --git a/internal/s3select/sql/evaluate.go b/internal/s3select/sql/evaluate.go
index 1ebef61d8..a8a729f94 100644
--- a/internal/s3select/sql/evaluate.go
+++ b/internal/s3select/sql/evaluate.go
@@ -69,6 +69,9 @@ func (e *Expression) evalNode(r Record, tableAlias string) (*Value, error) {
 		if !ok {
 			return nil, errExpectedBool
 		}
+		if b {
+			return FromBool(true), nil
+		}
 		result = result || b
 	}
 	return FromBool(result), nil
@@ -91,6 +94,9 @@ func (e *AndCondition) evalNode(r Record, tableAlias string) (*Value, error) {
 		if !ok {
 			return nil, errExpectedBool
 		}
+		if !b {
+			return FromBool(false), nil
+		}
 		result = result && b
 	}
 	return FromBool(result), nil