fix biased function name list

.github/workflows/scheduled.yml

@@ -820,12 +820,21 @@ jobs:
           ls /tmp/signatures
           echo "Biased functions:"
           cat /tmp/signatures/presto_bias_functions
+          function_names=""
+          IFS=',' read -r -a array <<< $(cat /tmp/signatures/presto_bias_functions)
+          for x in ${array[@]}; do
+          if [ -n "$function_names" ]; then
+            function_names+=","
+          fi
+          function_names+=$(echo $x | cut -d '=' -f 1)
+          done
+          echo "Biased function names: $function_names"
           echo "Running Fuzzer for $DURATION"
           ./velox_expression_fuzzer_test \
                 --seed ${RANDOM} \
                 --lazy_vector_generation_ratio 0.2 \
                 --common_dictionary_wraps_generation_ratio=0.3 \
-                --only=$(cat /tmp/signatures/presto_bias_functions) \
+                --only=$function_names \
                 --duration_sec $DURATION \
                 --enable_variadic_signatures \
                 --velox_fuzzer_enable_complex_types \