[postgis-users] How can i interchange(swap) the values of a band in postgis raster

[Zelio Fernandes]

SELECT ST_Band(rast,2,1) FROM image2tiff;

ERROR:  function st_band(raster, integer, integer) does not exist
LINE 1: SELECT ST_Band(rast,2,1) FROM image2tiff;
               ^
HINT:  No function matches the given name and argument types. You might need
to add explicit type casts.


********** Error **********

ERROR: function st_band(raster, integer, integer) does not exist
SQL state: 42883
Hint: No function matches the given name and argument types. You might need
to add explicit type casts.
Character: 8


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