ACM Reference Format:
1 INTRODUCTION  
2 DEEP LEARNING-BASED CODE SEARCH FRAMEWORK  
3 QUERY REPRESENTATION AND ENHANCEMENT (RQ1)  
4 CODE REPRESENTATION AND VECTORIZATION (RQ2)  
5 TRAINING METHOD (RQ3)  
6 DATASETS AND EVALUATION (RQ4)  
7 OPEN CHALLENGES AND FUTURE DIRECTIONS (RQ5)  
8 CONCLUSION