Should close $wpdb via $wpdb->close()

The close() function was added for completeness in the database abstraction. If the database is prematurely closed in a plugin or theme (as you are using it), the next call to wpdb::query() will re-open the connection.

Your Commands out of sync error is a MySQL error, not a WordPress one, and it might be coming from a plugin or theme that you’re using. Googling for wordpress database commands out of sync comes up with a lot of possible issues, including caching plugins. Try disabling all plugins and switching to a default theme (like Twenty Twenty); if the issue goes away, turn plugins back on till you find the culprit. Then contact that plugin’s support crew.

Related Posts:

  1. How To Get Some Data From WordPress Database Using WordPress $wpdb Query?
  2. Order by custom table and multiplication
  3. wp_Qwery works to slow
  4. How to access custom WordPress database tables
  5. List of ways to access WordPress database?
  6. Specify strict ‘order by’ in WordPress query
  7. Does WordPress have something like Drupal’s DB API?
  8. How to get user avatar via WPDB
  9. Include post_status check within $wpdb query
  10. wpdb get_results() returns only 2 rows
  11. Optimising amount of calls to custom fields
  12. How to print the excuted sql right after its execution
  13. Ignoring initial articles (like ‘a’, ‘an’ or ‘the’) when sorting queries?
  14. Return only Count from a wp_query request?
  15. how does $wpdb differ to WP_Query?
  16. Should I use Transients with W3 Total Cache APC Caching? [closed]
  17. Is it true $wpdb->get_results is faster than WP_Query in most cases?
  18. Get posts by menu ID
  19. Use WP_Query with a custom SQL query
  20. How to make an activities stream mixing posts and comments?
  21. Get number of comments after modifying comment query
  22. How to change a custom query into a standard loop?
  23. How to count data records in wordpress which have same meta_value in wp_postmeta table?
  24. Get the post permalink within the loop but without additional DB query
  25. Filter WordPress posts by between parameter
  26. Retrieve featured image (thumbnail) url from multiple posts with one query
  27. $wpdb->insert inserting two rows in database
  28. Get the Plugin Which Triggered a MySql Query in WordPress?
  29. How would I format a query that depends on post parent taxonomy
  30. Mysql query LIKE not working
  31. How WordPress attaches its Featured Images with posts?
  32. How to correctly pass values to wpdb->prepare()?
  33. wpdb custom post_type problem
  34. $wpdb select date range of posts
  35. why update and delete query not worked in custom table?
  36. How to delete taxonomy term when a wordpress user is removed?
  37. How to create database table, add data, update and delete using wpdb via plugins?
  38. Custom Query num_rows returns wrong amount
  39. Getting post revision and printing them on the post content site
  40. Filtering posts from different categories into different section by doing WP_Query only once
  41. Iterating through $wpdb query without using get_results for large query results
  42. How to implement a new row_count method in WordPress?
  43. Query with search and subscribers only output
  44. querying data via $wpdb and get_row
  45. No results found from a $wpdb->get_results() query when trying to join more than one meta key query
  46. How to query custom post types with mixed AND & OR statements for custom fields
  47. Query most popular terms by taxonomy over 2 week period
  48. wp_posts table: safely remove unused columns to save database storage
  49. Which is faster wpdb & get_row or wp_query & ge_post_meta?
  50. Custom query: Get all posts that are from a certain category?
  51. How to pass orderby params to $wpdb->prepare()?
  52. Ajax future single post query doesn’t work when NOT logged in
  53. Conditional sorting with variable using WP Query
  54. Is it safe to access the underlying mysqli object from \wpdb for custom queries?
  55. Is it possible to query from external database? [duplicate]
  56. WP User Query with Custom Fields and Search Results
  57. Make a SQL query with wpdb in WordPress
  58. How to set up hierarchical relationships without using plugins / meta query
  59. how to get Nearby zipcode
  60. Slow Query On Search
  61. Wpdb->query result show 1 but is not an integer
  62. Why having more than 10 clauses in WP_Query results in some outputs being dropped?
  63. Storing an array of objects related to each user
  64. Retrieve data from wordpress db via input and put those result in dropdown
  65. WP Query – filtering terms with regex
  66. Function to retrieve IDs of posts, cache results, and improve wp_query
  67. Issue with data array format
  68. Disable (or limit) queries when certain content (or data) is not needed (or showed)
  69. get_var is neither a string, integer, or array …?
  70. What’s wrong with this wpdb query?
  71. Save queried result into database
  72. Any way to use FETCH_KEY_PAIR with $wpdb?
  73. Doing $wpdb->get_results returns NULL, doing the same query in my DB returns correct value
  74. wp query search multi terms
  75. How to get meta key list efficiently?
  76. Fix wp_term_relationships slow query in get_posts
  77. Translating WP query into to SQL query
  78. update_post_meta performance in a loop woocommerce
  79. update_post_meta performance in a loop woocommerce
  80. WP_Term_Query->get_terms() very slow query for WordPress filter
  81. Separate by Category Post Type
  82. I removed the “wp_rm_logs” table and am constantly getting this error
  83. In which file to use $wpdb and its functions for database operations and queries in wordpress?
  84. What argument does my function need to echo get_results() query results
  85. complex query question
  86. Select Unique Posts for a List of Tags
  87. How To Use WP_Query To Get The Custom Post type Posts With Keywords
  88. Website goes slow down after importing long database
  89. WP_Query always returning the last custom post
  90. Fire query on ajax post url page
  91. Slow getting posts from category
  92. Custom query (author is post_author or meta co_author) with Pagenavi pagination
  93. WP_Query search by multiple meta key and distance
  94. Different sql queries count indicator on the main page [closed]
  95. Convert a WP Query into a simpler SQL query to fetch only COUNT of posts
  96. 294 Queries on Mainpage of WordPress
  97. how to add limit records in wordpress query
  98. WP_Query by meta key not returning any posts
  99. SQL query into to WP query
  100. Is there another way to retrieve a post_id from post_meta other than a SQL query?