Change `DataFrame.filter(predicates: Expr | str)`

[milenkovicm]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

there is a bit of ceremony involved into creating filter statement

from datafusion import col, lit
df.filter(col("age") > lit(3))

Describe the solution you'd like

Add support for string expressions, something like

df.filter("age > 3").show()

which would simplify filter creation, but keep support for original way to create expression parameter

Describe alternatives you've considered

Expose DataFrame.parse_sql_expr(e) and use it as needed. Or it could be exposed as well as there could be quite few places it would be useful.

Additional context

• Spark DataFrame.filter(...) implementation

[K-dash]

@milenkovicm
Hi! I'd like to work on this issue and have created a PR to address it.
#1276