public static interface BuiltInMetadata.ColumnOrigin extends Metadata
Modifier and Type | Interface and Description |
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static interface |
BuiltInMetadata.ColumnOrigin.Handler
Handler API.
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Modifier and Type | Field and Description |
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static MetadataDef<BuiltInMetadata.ColumnOrigin> |
DEF |
Modifier and Type | Method and Description |
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java.util.Set<RelColumnOrigin> |
getColumnOrigins(int outputColumn)
For a given output column of an expression, determines all columns of
underlying tables which contribute to result values.
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static final MetadataDef<BuiltInMetadata.ColumnOrigin> DEF
java.util.Set<RelColumnOrigin> getColumnOrigins(int outputColumn)
outputColumn
- 0-based ordinal for output column of interestCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.