How to populate mysql database column to json values - mysql

Question

I try to populate mysql database column values to json values of items without success.
Database structure:
CREATE TABLE IF NOT EXISTS `ejkb4_k2_items` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`code` varchar(11) NOT NULL,
`title` varchar(255) NOT NULL,
`alias` varchar(255) DEFAULT NULL,
`catid` int(11) NOT NULL,
`published` smallint(6) NOT NULL DEFAULT '0',
`introtext` mediumtext,
`fulltext` mediumtext,
`video` text,
`gallery` varchar(255) DEFAULT NULL,
`extra_fields` text CHARACTER SET utf8 COLLATE utf8_unicode_ci,
`extra_fields_search` text NOT NULL,
`created` datetime NOT NULL,
`created_by` int(11) NOT NULL DEFAULT '0',
`created_by_alias` varchar(255) NOT NULL,
`checked_out` int(10) unsigned NOT NULL,
`checked_out_time` datetime NOT NULL,
`modified` datetime NOT NULL,
`modified_by` int(11) NOT NULL DEFAULT '0',
`publish_up` datetime NOT NULL,
`publish_down` datetime NOT NULL,
`trash` smallint(6) NOT NULL DEFAULT '0',
`access` int(11) NOT NULL DEFAULT '0',
`ordering` int(11) NOT NULL DEFAULT '0',
`featured` smallint(6) NOT NULL DEFAULT '0',
`featured_ordering` int(11) NOT NULL DEFAULT '0',
`image_caption` text NOT NULL,
`image_credits` varchar(255) NOT NULL,
`video_caption` text NOT NULL,
`video_credits` varchar(255) NOT NULL,
`hits` int(10) unsigned NOT NULL,
`params` text NOT NULL,
`metadesc` text NOT NULL,
`metadata` text NOT NULL,
`metakey` text NOT NULL,
`plugins` varchar(1024) NOT NULL DEFAULT 'k2storeitem_price=1',
`code_search` varchar(11) NOT NULL,
`language` char(7) NOT NULL,
PRIMARY KEY (`id`),
KEY `item` (`published`,`publish_up`,`publish_down`,`trash`,`access`),
KEY `catid` (`catid`),
KEY `created_by` (`created_by`),
KEY `ordering` (`ordering`),
KEY `featured` (`featured`),
KEY `featured_ordering` (`featured_ordering`),
KEY `hits` (`hits`),
KEY `language` (`language`),
FULLTEXT KEY `search` (`title`,`introtext`,`fulltext`,`extra_fields_search`,`image_caption`,`image_credits`,`video_caption`,`video_credits`,`metadesc`,`metakey`),
FULLTEXT KEY `title` (`title`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=992 ;
One item from this database table:
INSERT INTO `ejkb4_k2_items` (`id`, `code`, `title`, `alias`, `catid`, `published`, `introtext`, `fulltext`, `video`, `gallery`, `extra_fields`, `extra_fields_search`, `created`, `created_by`, `created_by_alias`, `checked_out`, `checked_out_time`, `modified`, `modified_by`, `publish_up`, `publish_down`, `trash`, `access`, `ordering`, `featured`, `featured_ordering`, `image_caption`, `image_credits`, `video_caption`, `video_credits`, `hits`, `params`, `metadesc`, `metadata`, `metakey`, `plugins`, `code_search`, `language`) VALUES
(992, '1234567', 'Спирателен вентил ХХХ', 'спирателен-вентил-ххх', 704, 1, '<ul>\r\n<li>материал</li>\r\n<li>още нещо</li>\r\n<li>друго...</li>\r\n<li>и още</li>\r\n</ul>', '', '<iframe width="560" height="315" src="https://www.youtube.com/embed/pMPinbC1VJ4" frameborder="0" allowfullscreen></iframe>', NULL, '[{"id":"1","value":"1\\""},{"id":"9","value":"22311"},{"id":"5","value":""},{"id":"6","value":""},{"id":"7","value":""},{"id":"8","value":""},{"id":"10","value":"\\u041f\\u0440\\u043e\\u0438\\u0437\\u0432\\u043e\\u0434\\u0438\\u0442\\u0435\\u043b \\u0425"}]', '1" 22311 Производител Х ', '2017-05-30 07:27:22', 50, '', 0, '0000-00-00 00:00:00', '2017-06-06 13:20:35', 50, '2017-05-30 07:27:22', '0000-00-00 00:00:00', 0, 1, 2, 0, 0, '', '', '', '', 14, '{"catItemTitle":"","catItemTitleLinked":"","catItemFeaturedNotice":"","catItemAuthor":"","catItemDateCreated":"","catItemRating":"","catItemImage":"","catItemIntroText":"","catItemExtraFields":"","catItemHits":"","catItemCategory":"","catItemTags":"","catItemAttachments":"","catItemAttachmentsCounter":"","catItemVideo":"","catItemVideoWidth":"","catItemVideoHeight":"","catItemAudioWidth":"","catItemAudioHeight":"","catItemVideoAutoPlay":"","catItemImageGallery":"","catItemImageGalleryWidth":"","catItemImageGalleryHeight":"","catItemDateModified":"","catItemReadMore":"","catItemCommentsAnchor":"","catItemK2Plugins":"","itemDateCreated":"","itemTitle":"","itemFeaturedNotice":"","itemAuthor":"","itemFontResizer":"","itemPrintButton":"","itemEmailButton":"","itemSocialButton":"","itemVideoAnchor":"","itemImageGalleryAnchor":"","itemCommentsAnchor":"","itemRating":"","itemImage":"","itemImgSize":"","itemImageMainCaption":"","itemImageMainCredits":"","itemIntroText":"","itemFullText":"","itemExtraFields":"","itemDateModified":"","itemHits":"","itemCategory":"","itemTags":"","itemAttachments":"","itemAttachmentsCounter":"","itemVideo":"","itemVideoWidth":"","itemVideoHeight":"","itemAudioWidth":"","itemAudioHeight":"","itemVideoAutoPlay":"","itemVideoCaption":"","itemVideoCredits":"","itemImageGallery":"","itemImageGalleryWidth":"","itemImageGalleryHeight":"","itemNavigation":"","itemComments":"","itemTwitterButton":"","itemFacebookButton":"","itemGooglePlusOneButton":"","itemAuthorBlock":"","itemAuthorImage":"","itemAuthorDescription":"","itemAuthorURL":"","itemAuthorEmail":"","itemAuthorLatest":"","itemAuthorLatestLimit":"","itemRelated":"","itemRelatedLimit":"","itemRelatedTitle":"","itemRelatedCategory":"","itemRelatedImageSize":"","itemRelatedIntrotext":"","itemRelatedFulltext":"","itemRelatedAuthor":"","itemRelatedMedia":"","itemRelatedImageGallery":"","itemK2Plugins":""}', '', 'robots=\nauthor=', '', '{"k2storeitem_enabled":"1","k2storeitem_sku":"","k2storeitem_price":"","k2storespecial_price":"","k2storeitem_tax":"0","k2storeitem_shipping":"0","k2storeitem_metrics":{"item_length":"0.00000000","item_width":"0.00000000","item_height":"0.00000000","item_length_class_id":"0","item_weight":"0.00000000","item_weight_class_id":"0"},"k2storeitem_cart_text":""}', '', '*');
All values from column code must be populated to column extra_fields - as value of id:9. For example {"id":"9","value":"22311"} must going to: {"id":"9","value":"1234567"} in all database items.