This topic describes the flow control functions that are supported by PolarDB-X 1.0.
PolarDB-X 1.0 supports the following flow control functions.
| Function | Description |
|---|---|
| CASE | Case operator |
| IF() | If/else construct |
| IFNULL() | Null if/else construct |
| NULLIF() | Return NULL if expr1 = expr2 |