Method unparse

core/src/main/java/org/apache/calcite/sql/SqlUpdate.java:180–209

(SqlWriter writer, int leftPrec, int rightPrec)

  }

  @Override public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
    final SqlWriter.Frame frame =
        writer.startList(SqlWriter.FrameTypeEnum.SELECT, "UPDATE", "");
    final int opLeft = getOperator().getLeftPrec();
    final int opRight = getOperator().getRightPrec();
    targetTable.unparse(writer, opLeft, opRight);
    SqlIdentifier alias = this.alias;
    if (alias != null) {
      writer.keyword("AS");
      alias.unparse(writer, opLeft, opRight);
    }
    final SqlWriter.Frame setFrame =
        writer.startList(SqlWriter.FrameTypeEnum.UPDATE_SET_LIST, "SET", "");
    for (Pair<SqlNode, SqlNode> pair
        : Pair.zip(getTargetColumnList(), getSourceExpressionList())) {
      writer.sep(",");
      SqlIdentifier id = (SqlIdentifier) pair.left;
      id.unparse(writer, opLeft, opRight);
      writer.keyword("=");
      SqlNode sourceExp = pair.right;
      sourceExp.unparse(writer, opLeft, opRight);
    }
    writer.endList(setFrame);
    SqlNode condition = this.condition;
    if (condition != null) {
      writer.sep("WHERE");
      condition.unparse(writer, opLeft, opRight);
    }
    writer.endList(frame);
  }

  @Override public void validate(SqlValidator validator, SqlValidatorScope scope) {
    validator.validateUpdate(this);