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AlterTableDropConstraint is an AlterTableCommand (Spark SQL) for ALTER TABLE DROP CONSTRAINT SQL command for CHECK constraints.

Creating Instance

AlterTableDropConstraint takes the following to be created:

  • Table (LogicalPlan)
  • Constraint Name
  • ifExists flag

AlterTableDropConstraint is created when:

Table Changes

changes: Seq[TableChange]

changes is part of the AlterTableCommand (Spark SQL) abstraction.

changes gives a single-element collection with an DropConstraint (with the constraintName and ifExists flag).