設定raster對象的指定波段的顏色表資訊，採用顏色表的JSON格式。
文法
raster ST_SetColorTable(raster rast, integer band_sn, cstring clb);參數
| 參數名稱 | 描述 |
| rast | raster對象。 |
| band_sn | 指定的波段序號，從0開始。 |
| clb | 顏色表的JSON格式，參見ST_ColorTable |
樣本
update rast set rast=ST_SetColorTable(rast,0,
'{"compsCount":4,
"entries":[
{"value":0,"c1":0,"c2":0,"c3":0,"c4":255},
{"value":1,"c1":0,"c2":0,"c3":85,"c4":255},
{"value":2,"c1":0,"c2":0,"c3":170,"c4":255}
]
}');
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(1 row)