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@@ -0,0 +1,54 @@
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+/*##############################################################################
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+
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+ HPCC SYSTEMS software Copyright (C) 2020 HPCC Systems®.
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+
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+ Licensed under the Apache License, Version 2.0 (the "License");
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+ you may not use this file except in compliance with the License.
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+ You may obtain a copy of the License at
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+
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+ http://www.apache.org/licenses/LICENSE-2.0
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+
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+ Unless required by applicable law or agreed to in writing, software
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+ distributed under the License is distributed on an "AS IS" BASIS,
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+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ See the License for the specific language governing permissions and
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+ limitations under the License.
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+############################################################################## */
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+
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+#onwarning(4523, ignore);
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+
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+import Std.File AS FileServices;
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+import $.setup;
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+prefix := setup.Files(false, false).QueryFilePrefix;
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+
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+num := 10;
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+pnum := 3;
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+
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+payloadRec := RECORD
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+ UNSIGNED8 p1;
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+END;
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+rec := RECORD
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+ UNSIGNED4 id;
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+ DATASET(payloadRec) pl;
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+END;
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+
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+d := DATASET(num, TRANSFORM(rec, SELF.id := COUNTER; SELF.pl := DATASET(pnum, TRANSFORM(payloadRec, SELF.p1 := -COUNTER))));
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+
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+i := INDEX(d, {id}, {d}, prefix + 'idx');
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+
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+payloadRec2 := RECORD
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+ STRING p1;
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+END;
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+rec2 := RECORD
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+ UNSIGNED4 id;
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+ DATASET(payloadRec2) pl;
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+END;
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+
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+d2 := DATASET([], rec2);
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+i2 := INDEX(d2, {id}, {d2}, prefix + 'idx');
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+
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+SEQUENTIAL(
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+ OUTPUT(d, , prefix + 'ds', OVERWRITE);
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+ BUILDINDEX(i, OVERWRITE);
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+ OUTPUT(i2);
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+);
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Gavin Halliday