Function convertRemoveClause

packages/graph/src/astToSteps.ts:727–745

* Convert a REMOVE clause into a RemoveStep.

(removeClause: RemoveClause)

 * Convert a REMOVE clause into a RemoveStep.
 */
function convertRemoveClause(removeClause: RemoveClause): RemoveStep {
  const items: RemoveStepItem[] = removeClause.items.map((item) => {
    if (item.type === "RemoveProperty") {
      return {
        type: "property" as const,
        variable: item.variable,
        property: item.property,
      };
    } else {
      // Label removal is not supported - validate early
      throw new Error(
        `REMOVE: Label removal is not supported. Labels are immutable. ` +
          `Cannot remove label '${item.label}' from '${item.variable}'.`,
      );
    }
  });

  return new RemoveStep({ items });
}

/**
 * Convert a MERGE clause into a MergeStep.