Method isUpsert

core/src/main/java/org/apache/calcite/sql/SqlInsert.java:90–92

Returns whether this is an UPSERT statement. In SQL, this is represented using the UPSERT keyword rather than INSERT; in the abstract syntax tree, an UPSERT is indicated by the presence of a SqlInsertKeyword#UPSERT keyword.

()

   * {@code INSERT}; in the abstract syntax tree, an UPSERT is indicated by the
   * presence of a {@link SqlInsertKeyword#UPSERT} keyword. */
  public final boolean isUpsert() {
    return getModifierNode(SqlInsertKeyword.UPSERT) != null;
  }

  @SuppressWarnings("assignment.type.incompatible")
  @Override public void setOperand(int i, @Nullable SqlNode operand) {