jiangtao69039 opened a new issue, #24637:
URL: https://github.com/apache/shardingsphere/issues/24637
#24532 Branches added to **BaseRule.g4/castFunction** may crash in a null
pointer. because **ctx.dataType()** my not exist.
```java
@Override
public final ASTNode visitCastFunction(final CastFunctionContext ctx) {
calculateParameterCount(ctx.expr());
FunctionSegment result = new
FunctionSegment(ctx.getStart().getStartIndex(), ctx.getStop().getStopIndex(),
ctx.CAST().getText(), getOriginalText(ctx));
for (ExprContext each : ctx.expr()) {
ASTNode expr = visit(each);
if (expr instanceof ColumnSegment) {
result.getParameters().add((ColumnSegment) expr);
} else if (expr instanceof LiteralExpressionSegment) {
result.getParameters().add((LiteralExpressionSegment) expr);
}
}
result.getParameters().add((DataTypeSegment) visit(ctx.dataType()));
return result;
}
```
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