ext/duckdb/prepared_statement.c in duckdb-0.9.0.1 vs ext/duckdb/prepared_statement.c in duckdb-0.9.1

@@ -10,11 +10,14 @@
 static VALUE duckdb_prepared_statement_execute(VALUE self);
 static idx_t check_index(VALUE vidx);
 
 #ifdef HAVE_DUCKDB_H_GE_V090
 static VALUE duckdb_prepared_statement_bind_parameter_index(VALUE self, VALUE name);
+#ifdef HAVE_DUCKDB_PARAMETER_NAME
+static VALUE duckdb_prepared_statement_parameter_name(VALUE self, VALUE vidx);
 #endif
+#endif
 
 static VALUE duckdb_prepared_statement_bind_bool(VALUE self, VALUE vidx, VALUE val);
 static VALUE duckdb_prepared_statement_bind_int8(VALUE self, VALUE vidx, VALUE val);
 static VALUE duckdb_prepared_statement_bind_int16(VALUE self, VALUE vidx, VALUE val);
 static VALUE duckdb_prepared_statement_bind_int32(VALUE self, VALUE vidx, VALUE val);
@@ -108,12 +111,31 @@
     if (duckdb_bind_parameter_index(ctx->prepared_statement, &idx, StringValuePtr(name)) == DuckDBError) {;
         rb_raise(rb_eArgError, "parameter '%s' not found", StringValuePtr(name));
     }
     return ULL2NUM(idx);
 }
-#endif
 
+#ifdef HAVE_DUCKDB_PARAMETER_NAME
+static VALUE duckdb_prepared_statement_parameter_name(VALUE self, VALUE vidx) {
+    rubyDuckDBPreparedStatement *ctx;
+    VALUE vname;
+    const char *name;
+    idx_t idx = check_index(vidx);
+
+    TypedData_Get_Struct(self, rubyDuckDBPreparedStatement, &prepared_statement_data_type, ctx);
+
+    name = duckdb_parameter_name(ctx->prepared_statement, idx);
+    if (name == NULL) {
+        rb_raise(eDuckDBError, "fail to get name of %llu parameter", (unsigned long long)idx);
+    }
+    vname = rb_str_new2(name);
+    duckdb_free((void *)name);
+    return vname;
+}
+#endif /* HAVE_DUCKDB_PARAMETER_NAME */
+#endif /* HAVE_DUCKDB_H_GE_V090 */
+
 static VALUE duckdb_prepared_statement_bind_bool(VALUE self, VALUE vidx, VALUE val) {
     rubyDuckDBPreparedStatement *ctx;
     idx_t idx = check_index(vidx);
 
     TypedData_Get_Struct(self, rubyDuckDBPreparedStatement, &prepared_statement_data_type, ctx);
@@ -328,9 +350,12 @@
     rb_define_method(cDuckDBPreparedStatement, "execute", duckdb_prepared_statement_execute, 0);
     rb_define_method(cDuckDBPreparedStatement, "nparams", duckdb_prepared_statement_nparams, 0);
 
 #ifdef HAVE_DUCKDB_H_GE_V090
     rb_define_method(cDuckDBPreparedStatement, "bind_parameter_index", duckdb_prepared_statement_bind_parameter_index, 1);
+#ifdef HAVE_DUCKDB_PARAMETER_NAME
+    rb_define_method(cDuckDBPreparedStatement, "parameter_name", duckdb_prepared_statement_parameter_name, 1);
+#endif
 #endif
 
     rb_define_method(cDuckDBPreparedStatement, "bind_bool", duckdb_prepared_statement_bind_bool, 2);
     rb_define_method(cDuckDBPreparedStatement, "bind_int8", duckdb_prepared_statement_bind_int8, 2);
     rb_define_method(cDuckDBPreparedStatement, "bind_int16", duckdb_prepared_statement_bind_int16, 2);