Tabularx in twocolumn documents

Question

I am trying to create a tabular that should

stretch to the full width of a single column of a twocolumn document using X column specifications and
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.?

L.J.R. · Answer

Maybe tabularray package is what you want:
documentclass[twocolumn]{article}

usepackage{tabularray}

begin{document}

Text Text Text Text Text Text Text Text Text
Text Text Text Text Text Text Text Text Text
Text Text Text Text Text Text Text Text Text

begin{longtblr}[
  caption = {Long Long Long Tabular},
  entry = {Short Caption},
  label = {tblr:test},
]{
  colspec = {lXX}, hlines,
  rowhead = 2, rowfoot = 1,
}
 Head    & Head  & Head    \
 Head    & Head  & Head    \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kappa & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kapp  & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kappa & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kappa & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kappa & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kappa & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Alpha   & Beta  & Gamma   \
 Epsilon & Zeta  & Eta     \
 Iota    & Kappa & Lambda  \
 Nu      & Xi    & Omicron \
 Rho     & Sigma & Tau     \
 Phi     & Chi   & Psi     \
 Foot    & Foot  & Foot    \
end{longtblr}

Text Text Text Text Text Text Text Text Text
Text Text Text Text Text Text Text Text Text
Text Text Text Text Text Text Text Text Text

end{document}

Tabularx in twocolumn documents

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