augustoasilva commented on a change in pull request #11166:
URL: https://github.com/apache/arrow/pull/11166#discussion_r743570760
##########
File path: cpp/src/gandiva/gdv_function_stubs.cc
##########
@@ -794,6 +795,162 @@ const char* gdv_fn_initcap_utf8(int64_t context, const
char* data, int32_t data_
*out_len = out_idx;
return out;
}
+
+GANDIVA_EXPORT
+const char* gdv_fn_elt_int32_utf8_utf8(int64_t context, int32_t pos, const
char* word1,
+ int32_t word1_len, const char* word2,
+ int32_t word2_len, int32_t* out_len) {
+ const char* selected;
+ if (pos < 1 || pos > 2) {
+ *out_len = 0;
+ return "";
+ }
+
+ if (pos == 1) {
+ *out_len = word1_len;
+ selected = word1;
+ }
+
+ if (pos == 2) {
+ *out_len = word2_len;
+ selected = word2;
+ }
+
+ char* out = reinterpret_cast<char*>(gdv_fn_context_arena_malloc(context,
*out_len));
+ if (out == nullptr) {
+ gdv_fn_context_set_error_msg(context, "Could not allocate memory for
output string");
+ *out_len = 0;
+ return "";
+ }
+ memcpy(out, selected, *out_len);
+ return out;
+}
+
+GANDIVA_EXPORT
+const char* gdv_fn_elt_int32_utf8_utf8_utf8(int64_t context, int32_t pos,
+ const char* word1, int32_t
word1_len,
+ const char* word2, int32_t
word2_len,
+ const char* word3, int32_t
word3_len,
+ int32_t* out_len) {
+ const char* selected;
+ if (pos < 1 || pos > 3) {
+ *out_len = 0;
+ return "";
+ }
+
+ if (pos == 1) {
Review comment:
Done
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