The Text-to-SQL task has significant application prospects in automating relational database query interfaces. It can reduce user learning costs and improve data query efficiency. However, in ...

SQL query optimization aims to choose an optimal Query Execution Plan (QEP) for a query. The existing optimizers usually choose the plan with the minimal execution cost. However, in some real ...

When the ternary condition contains a == null check, the else branch doesn't eliminate null values in the else expression, resulting in queries that will scan more data than required when executed ...