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-rw-r--r--src/include/utils/varlena.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/utils/varlena.h b/src/include/utils/varlena.h
index cab82ee888b..06f3b69893c 100644
--- a/src/include/utils/varlena.h
+++ b/src/include/utils/varlena.h
@@ -16,7 +16,7 @@
#include "nodes/pg_list.h"
#include "utils/sortsupport.h"
-extern int varstr_cmp(char *arg1, int len1, char *arg2, int len2, Oid collid);
+extern int varstr_cmp(const char *arg1, int len1, const char *arg2, int len2, Oid collid);
extern void varstr_sortsupport(SortSupport ssup, Oid collid, bool bpchar);
extern int varstr_levenshtein(const char *source, int slen,
const char *target, int tlen,