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24 lines
1.4 KiB
SQL
24 lines
1.4 KiB
SQL
-- Test NULL raster
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SELECT ST_MapAlgebraExpr(NULL, 1, NULL, 'rast + 20', 2) IS NULL FROM ST_TestRaster(0, 0, -1) rast;
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-- Test empty raster
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SELECT ST_IsEmpty(ST_MapAlgebraExpr(ST_MakeEmptyRaster(0, 10, 0, 0, 1, 1, 1, 1, -1), 1, NULL, 'rast + 20', 2));
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-- Test hasnoband raster
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SELECT ST_HasNoBand(ST_MapAlgebraExpr(ST_MakeEmptyRaster(10, 10, 0, 0, 1, 1, 1, 1, -1), 1, NULL, 'rast + 20', 2));
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-- Test hasnodata value
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(ST_SetBandNoDataValue(rast, NULL), 1, NULL, 'rast + 20', 2), 1, 1) FROM ST_TestRaster(0, 0, -1) rast;
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-- Test nodata value
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(rast, 1, NULL, 'rast + 20', 2), 1, 1) FROM ST_TestRaster(0, 0, -1) rast;
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-- Test 'rast' expression
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(rast, 1, NULL, 'rast', 2), 1, 1) FROM ST_TestRaster(0, 0, -1) rast;
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(ST_SetBandNoDataValue(rast, NULL), 1, NULL, 'rast'), 1, 1) FROM ST_TestRaster(0, 0, -1) rast;
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-- Test pixeltype
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(rast, 1, '4BUI', 'rast + 20', 2), 1, 1) FROM ST_TestRaster(0, 0, 100) rast;
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(rast, 1, '4BUId', 'rast + 20', 2), 1, 1) FROM ST_TestRaster(0, 0, 100) rast;
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SELECT ST_Value(rast, 1, 1), ST_Value(ST_MapAlgebraExpr(rast, 1, '2BUI', 'rast + 20', 2), 1, 1) FROM ST_TestRaster(0, 0, 101) rast;
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