case class ResolveDefaultColumns(catalog: SessionCatalog) extends Rule[LogicalPlan] with Product with Serializable
This is a rule to process DEFAULT columns in statements such as CREATE/REPLACE TABLE.
Background: CREATE TABLE and ALTER TABLE invocations support setting column default values for later operations. Following INSERT, UPDATE, and MERGE commands may then reference the value using the DEFAULT keyword as needed.
Example: CREATE TABLE T(a INT DEFAULT 4, b INT NOT NULL DEFAULT 5); INSERT INTO T VALUES (1, 2); INSERT INTO T VALUES (1, DEFAULT); INSERT INTO T VALUES (DEFAULT, 6); SELECT * FROM T; (1, 2) (1, 5) (4, 6)
- catalog
the catalog to use for looking up the schema of INSERT INTO table objects.
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- new ResolveDefaultColumns(catalog: SessionCatalog)
- catalog
the catalog to use for looking up the schema of INSERT INTO table objects.
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- def addMissingDefaultValuesForInsertFromInlineTable(node: LogicalPlan, insertTableSchemaWithoutPartitionColumns: StructType, numUserSpecifiedColumns: Int): (LogicalPlan, Boolean)
Updates an inline table to generate missing default column values.
Updates an inline table to generate missing default column values. Returns the resulting plan plus a boolean indicating whether such values were added.
- def apply(plan: LogicalPlan): LogicalPlan
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- final def asInstanceOf[T0]: T0
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- val catalog: SessionCatalog
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- def conf: SQLConf
The active config object within the current scope.
The active config object within the current scope. See SQLConf.get for more information.
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- val ruleName: String
Name for this rule, automatically inferred based on class name.
Name for this rule, automatically inferred based on class name.
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