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The operators in Odysseus must not be aware which meta data they process. Therefore, special meta data merge functions are provided. They will be injected at query compile time.
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The meta data can used as any other attributes.
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SELECT({PREDICATE = 'TimeInterval.start > 0'},timer2) |
When using Odysseus Studio the meta data is displayed in the outline of an operator:
The values are shown in the result table:
