scripts: add sql slices workaround to sqlc gen script

This copies the workaround introduced in the taproot-assets code base
and will allow us to use `WHERE x in <list>` type queries.

sqldb/sqlc/db_custom_test.go

@@ -0,0 +1,67 @@
+package sqlc
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// BenchmarkMakeQueryParams benchmarks the makeQueryParams function for
+// various argument sizes. This helps to ensure the function performs
+// efficiently when generating SQL query parameter strings for different
+// input sizes.
+func BenchmarkMakeQueryParams(b *testing.B) {
+	cases := []struct {
+		totalArgs int
+		listArgs  int
+	}{
+		{totalArgs: 5, listArgs: 2},
+		{totalArgs: 10, listArgs: 3},
+		{totalArgs: 50, listArgs: 10},
+		{totalArgs: 100, listArgs: 20},
+	}
+
+	for _, c := range cases {
+		name := fmt.Sprintf(
+			"totalArgs=%d/listArgs=%d", c.totalArgs,
+			c.listArgs,
+		)
+		b.Run(name, func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				_ = makeQueryParams(
+					c.totalArgs, c.listArgs,
+				)
+			}
+		})
+	}
+}
+
+// TestMakeQueryParams tests the makeQueryParams function for various
+// argument sizes and verifies the output matches the expected SQL
+// parameter string. The function is assumed to generate a comma-separated
+// list of parameters in the form $N for use in SQL queries.
+func TestMakeQueryParams(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		totalArgs int
+		listArgs  int
+		expected  string
+	}{
+		{totalArgs: 5, listArgs: 2, expected: "$4,$5"},
+		{totalArgs: 10, listArgs: 3, expected: "$8,$9,$10"},
+		{totalArgs: 1, listArgs: 1, expected: "$1"},
+		{totalArgs: 3, listArgs: 0, expected: ""},
+		{totalArgs: 4, listArgs: 4, expected: "$1,$2,$3,$4"},
+	}
+
+	for _, tc := range testCases {
+		result := makeQueryParams(tc.totalArgs, tc.listArgs)
+		require.Equal(
+			t, tc.expected, result,
+			"unexpected result for totalArgs=%d, "+
+				"listArgs=%d", tc.totalArgs, tc.listArgs,
+		)
+	}
+}