Copy data from one wordpress database to another (tables wp_posts and wp_postmeta)

copy.sql

-- Don't forget chech base_product at wp_postmeta
DELETE FROM dest_db.wp_terms
    WHERE exists(SELECT * FROM dest_db.wp_term_taxonomy
      WHERE taxonomy='wpc-template-cat' AND wp_term_taxonomy.term_id=wp_terms.term_id);

DELETE FROM dest_db.wp_term_relationships
WHERE term_taxonomy_id IN (SELECT wp_term_taxonomy.term_taxonomy_id FROM dest_db.wp_term_taxonomy
      WHERE taxonomy='wpc-template-cat');

DELETE FROM dest_db.wp_term_taxonomy
      WHERE taxonomy='wpc-template-cat';

DROP PROCEDURE IF EXISTS copy_taxonomy;
CREATE PROCEDURE copy_taxonomy()
BEGIN
  DECLARE done INT DEFAULT FALSE;
  DECLARE old_term_id INT;
  DECLARE new_term_id INT;
  DECLARE cur_term CURSOR FOR SELECT term_id FROM source_db.wp_terms
    WHERE exists(SELECT * FROM source_db.wp_term_taxonomy
      WHERE taxonomy='wpc-template-cat' AND wp_term_taxonomy.term_id=wp_terms.term_id);
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

  OPEN cur_term;

  read_loop: LOOP
    FETCH cur_term INTO old_term_id;
    IF done THEN
      LEAVE read_loop;
    END IF;
    INSERT INTO dest_db.wp_terms (name, slug, term_group, term_order)
      SELECT name, slug, term_group, term_order FROM source_db.wp_terms WHERE wp_terms.term_id=old_term_id;
    SET @new_term_id=LAST_INSERT_ID();
    INSERT INTO dest_db.wp_term_taxonomy (term_id, taxonomy, description, parent, count)
      SELECT @new_term_id, taxonomy, description, parent, count FROM source_db.wp_term_taxonomy
      WHERE wp_term_taxonomy.term_id=old_term_id;

  END LOOP;

  CLOSE cur_term;
END;

CALL copy_taxonomy();

DELETE FROM dest_db.wp_postmeta WHERE post_id IN (
  SELECT ID FROM dest_db.wp_posts WHERE post_type='wpc-template'
);

DELETE FROM dest_db.wp_posts WHERE post_type='wpc-template';

DROP PROCEDURE IF EXISTS copy_data;
CREATE PROCEDURE copy_data()
BEGIN
  DECLARE done INT DEFAULT FALSE;
  DECLARE old_post_id INT;
  DECLARE new_post_id INT;
  DECLARE new_term_taxonomy_id INT;
  DECLARE term_name VARCHAR(200);
  DECLARE cur_post CURSOR FOR SELECT ID FROM source_db.wp_posts WHERE post_type='wpc-template';
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

  OPEN cur_post;

  read_loop: LOOP
    FETCH cur_post INTO old_post_id;
    IF done THEN
      LEAVE read_loop;
    END IF;
    INSERT INTO dest_db.wp_posts (post_author, post_date, post_date_gmt, post_content, post_title, post_excerpt, post_status,
                          comment_status, ping_status, post_password, post_name, to_ping, pinged, post_modified,
                          post_modified_gmt, post_content_filtered, post_parent, guid, menu_order, post_type,
                          post_mime_type, comment_count)
      SELECT post_author, post_date, post_date_gmt, post_content, post_title, post_excerpt, post_status,
                          comment_status, ping_status, post_password, post_name, to_ping, pinged, post_modified,
                          post_modified_gmt, post_content_filtered, post_parent, guid, menu_order, post_type,
                          post_mime_type, comment_count FROM source_db.wp_posts WHERE wp_posts.ID=old_post_id;
    SET @new_post_id:=LAST_INSERT_ID();
    INSERT INTO dest_db.wp_postmeta (post_id, meta_key, meta_value)
      SELECT @new_post_id, meta_key, meta_value FROM source_db.wp_postmeta WHERE wp_postmeta.post_id=old_post_id;

    SELECT t.name FROM source_db.wp_term_relationships r
      LEFT JOIN source_db.wp_term_taxonomy tx ON tx.term_taxonomy_id=r.term_taxonomy_id
      LEFT JOIN source_db.wp_terms t ON t.term_id=tx.term_id
    WHERE r.object_id=old_post_id
    LIMIT 1
    INTO @term_name;

    SELECT tx.term_taxonomy_id FROM dest_db.wp_terms t
      LEFT JOIN dest_db.wp_term_taxonomy tx ON t.term_id=tx.term_id
    WHERE t.name=@term_name
    LIMIT 1 INTO @new_term_taxonomy_id;

    INSERT INTO dest_db.wp_term_relationships (object_id, term_taxonomy_id, term_order)
    VALUES (@new_post_id, @new_term_taxonomy_id, 0);
  END LOOP;

  CLOSE cur_post;
END;

CALL copy_data();