SQL itself has no variables.   What programming language are you using and how does it call SQL?  PosgGIS supports WKT format so pretty much any programming language which can store strings can store geometry.

Ruven Brooks

On 8/21/2020 7:54 AM, Shaozhong SHI wrote:
Has anyone got experience in storing geometries in variables, so that these can be used in a program?

Regards,

Shao

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