Troubleshooting of MySQL errors: Difference between revisions

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Troubleshooting of MySQL errors (edit)

Revision as of 19:29, 12 May 2024

1,458 bytes removed ,  12 May 2024
→‎ERROR 1170: BLOB/TEXT column 'url' used in key specification without a key length
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* Because the hard disk of partition where [https://dev.mysql.com/doc/refman/5.7/en/data-directory.html MySQL Data Directory] located is full or almost full, free some hard disk space<ref>[http://stackoverflow.com/questions/730579/error-1114-hy000-the-table-is-full mysql - ERROR 1114 (HY000): The table is full - Stack Overflow]</ref>.
* Because the hard disk of partition where [https://dev.mysql.com/doc/refman/5.7/en/data-directory.html MySQL Data Directory] located is full or almost full, free some hard disk space<ref>[http://stackoverflow.com/questions/730579/error-1114-hy000-the-table-is-full mysql - ERROR 1114 (HY000): The table is full - Stack Overflow]</ref>.


== ERROR 1170: BLOB/TEXT column 'url' used in key specification without a key length ==
Condition
* SQL syntax when tried to create the new table
<pre>
DROP TABLE IF EXISTS `my_table`;
/*!40101 SET @saved_cs_client    = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `my_table` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(500) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `url` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `status` tinyint(2) unsigned NOT NULL DEFAULT 1,
  PRIMARY KEY (`job_id`),
  UNIQUE KEY `url` (`url`) USING HASH
) ENGINE=InnoDB AUTO_INCREMENT=3573 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
/*!40101 SET character_set_client = @saved_cs_client */;
</pre>
Solution: BLOB/TEXT column 'url' used in key specification with a key length e.g. {{kbd | key=`url`(500)}}
<pre>
DROP TABLE IF EXISTS `my_table`;
/*!40101 SET @saved_cs_client    = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `my_table` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(500) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `url` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `status` tinyint(2) unsigned NOT NULL DEFAULT 1,
  PRIMARY KEY (`id`),
  UNIQUE KEY `url` (`url`(500))
) ENGINE=InnoDB AUTO_INCREMENT=3573 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
/*!40101 SET character_set_client = @saved_cs_client */;
</pre>


== Database and Table Operation Errors ==
== Database and Table Operation Errors ==
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