From 5f9498babc185929623250756caa75d5622b1a3b Mon Sep 17 00:00:00 2001
From: Dan Hansen <dan@recidiviz.org>
Date: Sat, 9 Mar 2024 06:53:03 -0800
Subject: [PATCH] [String] `LIKE` properly escapes regexp-characters (#156)

* [String] `LIKE` properly escapes regexp-characters

* remove unused import
---
 internal/function.go | 2 +-
 query_test.go        | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/internal/function.go b/internal/function.go
index e936c28..34306ef 100644
--- a/internal/function.go
+++ b/internal/function.go
@@ -214,7 +214,7 @@ func LIKE(a, b Value) (Value, error) {
 	if err != nil {
 		return nil, err
 	}
-	wildcard := strings.Replace(vb, "%", ".*", -1)
+	wildcard := strings.Replace(regexp.QuoteMeta(vb), "%", ".*", -1)
 	matchLimits := fmt.Sprintf("^%s$", wildcard)
 	re, err := regexp.Compile(matchLimits)
 	if err != nil {
diff --git a/query_test.go b/query_test.go
index 3a39a5a..d0bdf18 100644
--- a/query_test.go
+++ b/query_test.go
@@ -158,6 +158,11 @@ func TestQuery(t *testing.T) {
 			query:        `SELECT "abcd" LIKE "a%d"`,
 			expectedRows: [][]interface{}{{true}},
 		},
+		{
+			name:         "like operator - special regex characters",
+			query:        `SELECT 'my*string' LIKE '%%*%%', 'my*string' LIKE '%%([][%';`,
+			expectedRows: [][]interface{}{{true, false}},
+		},
 		{
 			name:         "like operator2",
 			query:        `SELECT "abcd" LIKE "%a%"`,