byName(table: NamedRelation, df: LogicalPlan): AppendDataAppendData Logical Operator — Appending Data to DataSourceV2
AppendData is a logical operator that represents appending data (the result of executing a structured query) to a table (with the columns matching by name or position) in Data Source API V2.
AppendData is created (indirectly via byName or byPosition factory methods) only for tests.
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Note
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AppendData has replaced the deprecated WriteToDataSourceV2 logical operator.
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AppendData takes the following to be created:
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Logical operator (for the query)
AppendData has a single child logical operator that is exactly the logical operator.
AppendData is resolved using ResolveOutputRelation logical resolution rule.
AppendData is planned (replaced) to WriteToDataSourceV2Exec physical operator (when the table is a DataSourceV2Relation logical operator).
byName Factory Method
byName simply creates a AppendData logical operator with the isByName flag on (true).
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Note
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byName seems used only for tests.
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byPosition Factory Method
byPosition(table: NamedRelation, query: LogicalPlan): AppendDatabyPosition simply creates a AppendData logical operator with the isByName flag off (false).
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Note
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byPosition seems used only for tests.
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