Tabularx in twocolumn documents

I am trying to create a tabular that should

1. stretch to the full width of a single column of a twocolumn document using X column specifications and
2. be broken over the columns and pages of a twocolumn document.

I have tried the following packages so far, but none could meet both of my requirements:

• vanilla tabular environment: none of the requirements are supported
• tabularx: supports 1. only
• longtable: cannot be used in twocolumn mode
• supertabular: supports 2. only
• xtab: despite the name supports 2. only
• ltablex: depends on longtable for 2. so it cannot be used in twocolumn mode for achieving 2.
• xltabular: same shortcoming as ltablex
• tabu: supports 1., but longtabu depends on longtable, so it cannot be used in twocolumn mode for achieving 2.

Is there any package or other solution that could support both 1. and 2.?