MySQL Errors

ERROR 1037 indicates MySQL has exhausted available memory, but the underlying cause can be insufficient RAM, too many file handles, corrupted table files, or memory buffer misconfiguration. This guide covers diagnosis and fixes.

MySQL Error 1069 occurs when a table definition exceeds the maximum number of allowed indexes (typically 64). This error commonly arises in ORMs and migrations that automatically create indexes for foreign keys. Resolve it by reviewing and consolidating redundant indexes or using composite indexes instead of multiple single-column indexes.

Error 1406 occurs when you attempt to insert or update data that exceeds the defined column width. This commonly happens with VARCHAR columns or when string data length mismatches occur due to character set encoding differences.

This MySQL Connector/C error occurs when a prepared statement is closed indirectly, often due to connection issues, improper statement lifecycle management, or server-side cleanup. The error typically appears in C/C++ applications using the MySQL C API when statements are not properly managed.

This error occurs when you attempt to INSERT or UPDATE a row in a MySQL table without providing a value for a NOT NULL column that has no default value. It is triggered only when MySQL is running in Strict mode, which enforces data integrity rules.

This error occurs when MySQL cannot locate a stored procedure or function you are trying to call. It is usually caused by a wrong database context, incorrect routine name, case sensitivity issues, or privilege problems.

This replication error occurs on MySQL slaves when the master cannot send binary log events due to packet size mismatches, corrupted logs, or missing binary log files. It typically requires resynchronizing the replication connection or adjusting packet size settings.

This error occurs when MySQL system tables have a different number of columns than expected by the current MySQL version, typically after an incomplete upgrade. The fix is to run the mysql_upgrade utility to synchronize your system tables with your current MySQL version.

MySQL error 1559 occurs when you try to change the binary log format while temporary tables are open. The fix is to close all temporary tables before attempting to switch the replication format.

ERROR 1206 occurs when InnoDB exhausts the lock table buffer space during large transactions or high-concurrency operations. The primary fix is increasing innodb_buffer_pool_size, though breaking large operations into smaller batches provides a quick workaround.

MySQL ERROR 2006 "server has gone away" occurs when the database connection is lost or closed unexpectedly. This happens when idle connections exceed the timeout threshold (default 8 hours), the server is restarted, packets are too large, or network issues disconnect the client. The error indicates the connection was valid but is no longer available.

This error occurs when the MySQL client and server fail to complete the initial handshake process during connection establishment. It typically indicates authentication protocol mismatches, version incompatibility, or network configuration issues.

MySQL error 2026 occurs when the SSL/TLS connection between client and server fails due to certificate issues, protocol version mismatches, or misconfiguration. This commonly affects database connections in applications and requires SSL certificate verification fixes.

This MySQL error occurs when attempting to use database privileges through a role that hasn't been properly granted to a user. Roles in MySQL provide a way to group privileges and assign them to users collectively. The error typically appears when executing SQL statements that require specific permissions managed through roles.

MySQL only allows one primary key per table. This error occurs when you define multiple PRIMARY KEY constraints in a CREATE TABLE or ALTER TABLE statement. Remove duplicate primary key definitions or use a composite primary key instead.

This error occurs when a MySQL window function frame specification uses UNBOUNDED PRECEDING as the frame end boundary. Window frames must follow logical ordering where the frame start cannot occur later than the frame end in the dataset.

The CR_MALFORMED_PACKET error occurs when MySQL server receives a corrupted or improperly formatted network packet from a client. This typically indicates network issues, client bugs, or protocol mismatches between the client and server. The error prevents successful communication and requires investigation of network stability, client libraries, and MySQL protocol compatibility.

This MySQL client error occurs when the MySQL client library cannot create a TCP/IP socket for connecting to the database server. The error indicates system-level socket creation failures, often due to resource exhaustion, permission issues, or network configuration problems. TCP/IP sockets are essential for remote database connections and certain local connections.

The MySQL client error 2014 occurs when you attempt to execute a new query before properly consuming all results from the previous query. This happens when client functions are called in the wrong order, leaving the client and server out of sync.

MySQL ERROR 1213 occurs when two or more concurrent transactions are waiting for each other to release locks, creating a circular dependency. This is a transactional database lock contention issue that requires application-level retry logic and optimized transaction design to resolve.

This MySQL error occurs when attempting to create or alter a table with all columns marked as INVISIBLE. MySQL requires every table to have at least one visible column to ensure data can be retrieved via standard SELECT * queries.

MySQL error 1449 occurs when a stored procedure, view, trigger, or event references a user account that no longer exists. The definer is the user who originally created the object, and MySQL cannot execute it without verifying the definer's privileges.

This MySQL client error occurs when a network packet exceeds the maximum allowed size configured in the server. The error typically appears during large data transfers, BLOB/CLOB operations, or bulk imports when individual packets exceed the max_allowed_packet limit. Increasing this server variable or breaking operations into smaller chunks resolves the issue.

This MySQL error occurs when data being inserted or updated violates a CHECK constraint defined on a table. CHECK constraints enforce data integrity rules at the database level, ensuring values meet specific conditions. The error indicates that one or more rows fail to satisfy the constraint condition, preventing the operation from completing.

This MySQL client error occurs when trying to read column data from a prepared statement without first fetching a result row. It typically happens in C/C++ applications using the MySQL C API with prepared statements when the application logic skips the row fetch step before accessing column values.

This MySQL connection error occurs when the client loses connection to the MySQL server, typically due to network issues, server timeouts, or server restarts. The error indicates that the MySQL server terminated the connection unexpectedly, often during long-running queries or idle periods.

This MySQL error occurs when using the RANGE frame specification in a window function without a proper ORDER BY clause that uses numeric or temporal data types. The error indicates that MySQL cannot determine the range boundaries because the ordering column is not compatible with range-based window frames.

MySQL ERROR 1021 occurs when the server runs out of disk space while writing data or temporary files. The server will pause operations and wait for space to become available. Fix it by freeing disk space, managing binary logs, redirecting the temp directory, or expanding storage.

MySQL throws ER_WINDOW_NO_SUCH_WINDOW when a window function refers to a named window (e.g. `OVER w`) that has no matching `WINDOW w AS (...)` definition in the same SELECT. The resolver cannot locate the shared specification, so the query fails before any rows are processed.

MySQL error 20 (EE_DISK_FULL) occurs when the server runs out of disk space while attempting to write data. This error blocks write operations while read-only queries continue, and can occur during INSERT, ALTER TABLE, or binary log operations. Recovery requires immediate free disk space.

CR_SERVER_LOST (2013) is thrown when the client loses the TCP session in the middle of a query. MySQL treats the connection as aborted and reports an "Aborted connection" entry, so the client never knows whether the statement finished. Timeouts, packet limits, network drops, and a restarted server are the usual suspects.

This error occurs when attempting to drop or rename a column that is referenced by a CHECK constraint. MySQL prevents the operation to maintain constraint integrity unless the constraint is dropped first.

This MySQL client error occurs when a prepared statement is closed with mysql_stmt_close() while rows are still being fetched, immediately canceling the retrieval operation. The error is raised on the client side when the fetch loop is interrupted before all rows have been retrieved, typically due to premature statement cleanup in applications using the MySQL C API, PHP mysqli, Python mysql-connector, or similar language bindings.

Error 5 occurs when MySQL cannot allocate the requested memory block, either due to insufficient system RAM or misconfigured buffer settings. This critical error halts query execution and requires immediate memory tuning or hardware upgrade.

This MySQL connection error occurs when a client application cannot establish a local socket connection to the MySQL server. The error typically indicates that the MySQL server is not running, the socket file path is incorrect, or there are permission issues preventing access to the socket file. Local socket connections are commonly used for connections from applications running on the same server as the database.

MySQL throws ER_WINDOW_INVALID_WINDOW_FUNC_USE when a window function is used incorrectly, such as mixing aggregate and non-aggregate window functions improperly, using window functions in invalid contexts like WHERE clauses, or violating MySQL's specific window function syntax rules. This error indicates a fundamental misunderstanding of how window functions work in MySQL.

This MySQL error occurs when a configuration file has overly permissive file permissions that allow other users to read or write to it. MySQL enforces strict security by requiring config files to be readable/writable only by the current user.

This client-side error occurs when calling deprecated or insecure MySQL C API functions. The error warns developers to replace unsafe functions with their modern, secure alternatives.

MySQL error 1184 (ER_NEW_ABORTING_CONNECTION) occurs when the server forcibly closes a connection during authentication or handshake due to invalid credentials, network issues, SSL mismatches, or max_connections limits being exceeded.

This client-side error occurs when a file path supplied to MySQL file operations exceeds operating system limits. Fix it by shortening file paths or restructuring directory hierarchies.

This error occurs when using a RANGE frame in a window function with a temporal ORDER BY column, but the frame bounds do not use INTERVAL syntax. MySQL requires INTERVAL expressions like "INTERVAL 5 DAY PRECEDING" for temporal columns.

This MySQL error occurs when using non-constant expressions (like column references or complex calculations) in RANGE frame boundaries for window functions. RANGE frames require constant numeric or interval values to define the window boundaries, not dynamic expressions that change per row.

This MySQL client error occurs when trying to fetch rows from a prepared statement that doesn't return a result set. It typically happens in C/C++ applications using the MySQL C API when calling mysql_stmt_fetch() on statements that execute non-SELECT queries like INSERT, UPDATE, or DELETE.

This error occurs when you try to reference a non-existent index or key in your MySQL table. It's commonly caused by using FORCE INDEX, USE INDEX, or DROP KEY commands with an index name that doesn't exist, or by typos in index names. The error can also occur when trying to drop a foreign key that has been corrupted or already removed.

MySQL Error 1177 occurs when the database engine cannot find, access, or open a table referenced in a CHECK or FOREIGN KEY constraint. Common causes include non-existent tables, case sensitivity mismatches, corrupted files, or insufficient permissions.

Error 1179 occurs when you attempt to run DDL (ALTER TABLE, LOCK TABLES) or administrative commands inside an active transaction. MySQL blocks these operations to maintain transaction integrity and prevent deadlocks.

CR_UNKNOWN_ERROR (2000) is a catch-all MySQL client error that fires before the connector can deliver a more specific message. It usually appears when the connection or authentication handshake is aborted early—for example, when TLS is required but the client and server cannot agree on a cipher stack or when an authentication plugin terminates the session without reporting a normal SQLSTATE. Because no additional diagnostics are printed, the client sees only "Unknown MySQL error" and the server log typically contains nothing more than a brief warning or a reverse DNS lookup entry.

Error 2059 occurs when MySQL client cannot locate or load a required authentication plugin library. This typically happens with caching_sha2_password after MySQL 8.0 changes or when the plugin directory is misconfigured.

This MySQL client error occurs when data being sent or received doesn't fit the target column's type or size constraints. It commonly appears during INSERT/UPDATE operations or when fetching prepared statement results.

This error occurs when using unsupported or invalid frame specifications in MySQL window functions. It typically happens when using GROUPS frame units, EXCLUDE clauses, or invalid combinations of frame boundaries.

MySQL error 29 (EE_FILENOTFOUND) occurs when the database server cannot locate a required file. This commonly happens with LOAD DATA INFILE operations, when accessing database table files, or due to file permission restrictions.

MySQL ERROR 1365 occurs when a query divides by zero, halting execution. Fix it using NULLIF(), CASE statements, or filtering with WHERE clauses to handle zero denominators safely.

This MySQL client error occurs when the client library cannot load the required character set definition files from disk. The error typically indicates that the character set files are missing, corrupted, or inaccessible, often due to incomplete MySQL installation, missing /usr/share/mysql/charsets directory, or incorrect file permissions.

This MySQL client error occurs when attempting to execute prepared statement operations on a statement that has not been properly initialized or prepared. The error indicates that statement handler functions are being called in the wrong order or on an invalid statement object.

This error occurs when MySQL cannot write temporary files to disk, usually due to insufficient permissions on the tmpdir, a full filesystem, or file descriptor limits being reached.

This error occurs when attempting to create a MySQL resource group with a name that already exists in the database. The fix involves either dropping the existing group, using a different name, or altering the existing group instead.

This MySQL connection error occurs when the client cannot establish a TCP/IP connection to the MySQL server at the specified host and port. The error typically indicates that the MySQL server is not running, a firewall is blocking the connection, the bind-address configuration is restricting remote access, or there are network connectivity issues between the client and server.

A protocol mismatch occurs when your MySQL client cannot communicate with the server due to incompatible protocol versions. This typically happens after version upgrades, downgrades, or when connecting to the wrong port.

Error 2061 occurs when the MySQL server selects an authentication plugin (usually caching_sha2_password in MySQL 8.0+) that the client cannot properly execute. Fix by using SSL/TLS, requesting the RSA public key, or changing the authentication plugin.

Error 3582 occurs when a window function tries to inherit a frame specification from a named window that already defines one. Fix it by removing redundant frame clauses or refactoring your window definitions.

MySQL ignores frame clauses when used with ranking and offset window functions like RANK(), ROW_NUMBER(), LAG(), and LEAD(). These functions always operate on the entire partition regardless of frame specifications. Remove the frame clause from affected functions or use frame clauses only with aggregate window functions.

MySQL error 3580 occurs when named windows reference each other in a circular pattern. Break the cycle by removing unnecessary windows or restructuring references to form a linear dependency chain.

This MySQL error occurs when you attempt to execute a COMMIT statement or an operation that causes an implicit commit inside a stored function or trigger, which MySQL does not permit. The error prevents transaction control statements from executing in these contexts.

This MySQL authentication error (1045) occurs when connection credentials are rejected during the authentication phase. The error indicates MySQL received the password but rejected it due to authentication method mismatch, incorrect password, wrong user account, socket authentication plugin, or permissions issue. Common on fresh installations with auth_socket authentication or when password authentication is not properly configured.

MySQL ERROR 1045 occurs when authentication fails during login. This happens when the username and password don't match, the user doesn't exist, or the host isn't allowed. The error appears immediately when connecting to MySQL and prevents database access until credentials are corrected.

The "Aborted connection" error (ERROR 1152) occurs when MySQL terminates a client connection due to a fatal network issue, timeout, or resource problem. This happens when the server detects the connection is unsafe to continue, such as when packet sizes exceed limits, clients timeout during idle periods, or communication errors occur.

This MySQL connection error occurs when the client cannot establish a Unix socket connection to a local MySQL server. The error typically indicates that the MySQL server is not running, the socket file doesn't exist or is inaccessible, or the client is looking for the socket in the wrong location.

MySQL ERROR 1025 occurs when attempting to rename or alter a table that has foreign key constraints or other structural conflicts. This error typically stems from constraint violations or file system issues during the rename operation.

MySQL Error 1050 occurs when attempting to CREATE a table that already exists in the database. Fix it using IF NOT EXISTS clause or by checking/dropping the existing table first.

ERROR 1054 occurs when MySQL cannot find a column you referenced in your query. This is usually caused by a typo, missing quotes around string values, or referencing a column that does not exist in the table.

ERROR 1055 occurs when a SELECT statement includes non-aggregated columns not in the GROUP BY clause while ONLY_FULL_GROUP_BY mode is enabled. Fix by adding missing columns to GROUP BY, using aggregate functions, or applying ANY_VALUE() to accept arbitrary values.

This error occurs when a column name referenced in your query exists in multiple joined tables, and MySQL cannot determine which table the column comes from. Qualify column names with table or alias prefixes to resolve the ambiguity.

This error occurs when you try to create an index or key on a column that doesn't exist in your MySQL table. It's typically caused by typos in column names, case sensitivity issues, or referencing a non-existent column in your ALTER TABLE or CREATE TABLE statement.

This error occurs when a GROUP BY query selects columns that are not aggregated or included in the GROUP BY clause. Add missing columns to GROUP BY or wrap them in aggregate functions like MAX(), MIN(), or ANY_VALUE().

MySQL ERROR 1036 occurs when the database cannot write to a table due to permission issues or read-only settings. This usually happens after copying database files, incorrect ownership, or enabling global read-only mode. Most commonly resolved by fixing file permissions.

ERROR 1060 occurs when a CREATE TABLE, ALTER TABLE, or SELECT statement tries to define the same column name twice. Resolve this by identifying the duplicate column and either removing, renaming, or qualifying it uniquely.

This error occurs when defining a window function with an invalid starting boundary in the OVER() clause. The frame start specification violates MySQL's window function syntax requirements.

MySQL throws error 1006 when it cannot create a new database due to file system permissions, disk space issues, or conflicting files. This typically requires checking write permissions on the MySQL data directory and ensuring sufficient disk space.

MySQL reaches its maximum allowed concurrent connections and rejects new connection attempts. This error commonly occurs when max_connections is too low, connections aren't properly closed, or traffic spikes exceed current capacity.

MySQL does not allow default values on BLOB, TEXT, GEOMETRY, or JSON columns due to how these types allocate memory. Remove the DEFAULT clause or use expression syntax (MySQL 8.0.13+) to fix this error.

This error occurs when you try to insert or update NULL into a column defined with a NOT NULL constraint. MySQL enforces this integrity rule to maintain data quality.

ERROR 1026 (ER_ERROR_ON_WRITE) occurs when MySQL cannot write to temporary, log, or data files. This is typically caused by insufficient disk space, missing file permissions, or a read-only filesystem. Fixing the underlying filesystem issue resolves the error.

ERROR 1020 (ER_CHECKREAD) occurs when another transaction modifies a record between reads in a multi-user environment. This commonly affects MyISAM tables and can be resolved through retry logic, isolation level adjustments, or row-level locking.

MySQL Error 1065 occurs when an empty or null SQL statement is sent to the server. This typically happens due to programming errors in query construction, malformed dynamic queries, or accidental empty strings in application code.

MySQL Error 1009 occurs when the DROP DATABASE command fails because the server cannot delete the database directory from the file system, usually due to permission issues, active connections, or leftover files.

MySQL error 1023 indicates that the server failed to close a table, log, or temporary file, typically caused by disk space issues, file permission problems, or file descriptor limits. This guide shows how to diagnose the underlying filesystem problem and resolve it.

MySQL error 1044 occurs when a user lacks sufficient privileges to access a specified database. The user can connect to the MySQL server but does not have permission to use the database. Fix this by granting proper privileges using GRANT statements and FLUSH PRIVILEGES.

This error occurs when you try to use a table option or feature that your storage engine (InnoDB, MyISAM, etc.) does not support. Common causes include deprecated options like ROW_FORMAT=FIXED, unsupported INDEX DIRECTORY clauses, or engine-specific features being used with incompatible engines.

This MySQL error occurs when you define an AUTO_INCREMENT column without a key constraint, or attempt to create multiple AUTO_INCREMENT columns. Fix it by adding PRIMARY KEY to your AUTO_INCREMENT column or ensuring only one auto column exists per table.

This error occurs when you attempt to create a database with CREATE DATABASE but a database with that name already exists. The fix is to use CREATE DATABASE IF NOT EXISTS to make the statement idempotent, or drop the existing database first if you want to start fresh.

MySQL Error 1073 occurs when trying to use a BLOB column as a key or index without specifying a prefix length. This happens because BLOB columns store variable-length data that MySQL cannot fully index, requiring either a table engine change, prefix length specification, or column type modification.

MySQL error 1022 occurs when you try to insert or update a row with a value that already exists in a column with a UNIQUE or PRIMARY KEY constraint. This guide shows how to identify duplicates, fix constraint conflicts, and safely update your data.

MySQL Error 1035 appears when the MyISAM storage engine detects a corrupted or outdated .MYI key file. Quick repair using REPAIR TABLE or myisamchk restores access to your table and prevents data integrity issues.

This error occurs when a query references a table that was not included in a preceding LOCK TABLES statement. Fix it by adding all required tables to your lock statement or by using UNLOCK TABLES to release locks and switch to transactions.

This error occurs when you try to create a table, index, or constraint with a name that already exists in the table. Common causes include running migrations twice or conflicting auto-generated index names. Fix it by checking existing indexes and either dropping the duplicate or using IF NOT EXISTS syntax in MySQL 8.0+.

MySQL Error 1074 occurs when a VARCHAR or CHAR column exceeds the maximum byte limit of 65,535 bytes. The actual character limit depends on your character set (UTF-8, GBK, Latin1), and can be reduced when using multi-byte encoding.

This MySQL error occurs when an INSERT statement tries to insert data into a table, but the number of columns specified doesn't match the number of values provided. The error is a validation check that prevents inserting incomplete or misaligned data. The mismatch typically happens when you don't explicitly list column names and provide the wrong number of values, or when you list columns but provide a different count of values.

ERROR 1010 occurs when MySQL cannot remove a database directory due to extra files or permission issues. The directory contains files that MySQL doesn't recognize or can't delete, preventing the DROP DATABASE command from completing successfully.

ERROR 1008 occurs when attempting to drop a database that doesn't exist on the MySQL server. The quickest fix is to use the IF EXISTS clause to prevent the error, or verify the database name and ensure it exists before dropping.

Error 1076 (ER_READY) is not actually an error but an informational message indicating that your MySQL server has successfully started and is ready to accept client connections. No action is required unless the message appears repeatedly, which could indicate server crashes.

MySQL ERROR 1024 (ER_ERROR_ON_READ) occurs when MySQL cannot read a database file due to permissions, corruption, or disk issues. Fixes involve checking permissions, disk space, file integrity, and restarting the MySQL server.

MySQL Error 1045 occurs when connection credentials are incorrect, the user lacks privileges from the specified host, or authentication settings are misconfigured. Fix it by verifying credentials, checking user permissions, and adjusting authentication plugins on MySQL 8.0+.

MySQL Error 1104 occurs when a SELECT query would examine more rows than the max_join_size limit allows. This typically happens with unindexed joins on large tables. Fix it by optimizing your query with proper indexes, adding WHERE clauses, or temporarily enabling SQL_BIG_SELECTS.

ERROR 1032 occurs when MySQL cannot locate a record during DELETE or UPDATE operations, commonly due to replication drift, table corruption, or incorrect WHERE clauses. This guide shows how to identify the root cause and resync your databases.

ERROR 1005 occurs when MySQL cannot create a table, usually due to foreign key constraint issues. Most commonly, this happens when data types don't match, storage engines are incompatible, or referenced tables don't exist. Fix by ensuring matching column types, using InnoDB for both tables, and verifying all referenced objects exist.

ERROR 1102 occurs when MySQL encounters an invalid or non-existent database name in your query. This typically happens due to typos, special characters, reserved words, or databases that no longer exist.

ERROR 1033 occurs when MySQL encounters corrupted or malformed table files (.frm, .MYD, or .MYI). This typically indicates table corruption from hardware failures, unexpected shutdowns, or filesystem issues that prevent MySQL from reading critical table metadata.

MySQL Error 1070 occurs when creating an index or primary key with more than 16 columns. MySQL enforces a hard limit of 16 key parts per index across all storage engines (InnoDB, MyISAM). Fix by reducing indexed columns or splitting into multiple indexes.

MySQL error 1064 indicates a syntax error in your SQL query. This happens when MySQL encounters mistyped commands, reserved words used as identifiers, incorrect punctuation, or deprecated syntax that it cannot parse.

Error 1062 occurs when you try to insert or update a record with a value that already exists in a column with a unique constraint (primary key or unique index). This can be fixed by checking for existing records, using INSERT...ON DUPLICATE KEY UPDATE, or properly managing your auto-increment values.

ERROR 1103 occurs when MySQL encounters an invalid or empty table identifier in your SQL statement. This is commonly caused by incorrect quoting, special characters, or reserved keywords in table names.

This error occurs when you try to add a PARTITION BY clause to a named window that already defines partitioning. Named windows in MySQL cannot be modified with additional PARTITION BY clauses once they are referenced in an OVER clause.

ERROR 1185 occurs when attempting binary backup operations on tables with storage engines that don't support this feature. Use mysqldump for logical backups or convert tables to InnoDB.

Error 1155 is a network communication issue that occurs when MySQL cannot complete file descriptor operations on the client-server connection. This typically indicates system resource limits have been reached or network connectivity problems are preventing proper connection handling.

ERROR 1109 occurs when MySQL cannot find a referenced table in your query. This is usually due to typos, incorrect database context, or table aliases. Fix it by verifying table names, checking your database context, and confirming the table exists.

ERROR 1175 occurs when safe update mode is enabled and you try to UPDATE or DELETE rows without specifying a WHERE clause on a key column. Disable safe updates, add a proper WHERE clause, or use LIMIT to fix this.

Error 1147 occurs when attempting to revoke table-level privileges that were never explicitly granted. Fix it by verifying user privileges, checking for typos in usernames or table names, or using IF EXISTS for MySQL 8.0.30+.

ERROR 1132 occurs when a user lacks UPDATE privilege on the mysql.user system database table needed to change passwords. Resolve by granting the required privileges or connecting as a privileged account like root.

MySQL Error 1143 occurs when a user attempts to access a column without the required column-level privileges. Grant the missing SELECT, INSERT, or UPDATE permission on that column to fix it.

MySQL EE_SSL_ERROR (60) indicates a failed SSL/TLS handshake between client and server. This typically results from certificate validation failures, permission issues, or TLS version mismatches. Fixing it involves verifying certificates, adjusting permissions, and reloading TLS configuration.

ERROR 1201 occurs in MySQL replication when the slave cannot initialize the master info structure, usually due to corrupted files or previous replication configuration. Reset the slave and reconfigure replication to fix this.

This error occurs when attempting to revoke or modify privileges for a user@host combination where no grant exists. It typically results from host mismatches, typos, or attempting to revoke privileges that were never granted. Verify the exact user and host, check existing grants, and ensure your REVOKE syntax matches an actual privilege assignment.

MySQL ERROR 1200 occurs when you try to execute replication commands on a server that hasn't been configured as a slave. This is typically fixed by running CHANGE MASTER TO with the correct replication settings or by verifying your configuration file.

This error occurs when attempting to change a MySQL password while logged in as an anonymous user. Anonymous accounts lack the ALTER USER privilege required to modify passwords, preventing password changes from succeeding.

MySQL Error 1156 occurs when network packets between client and server are received out of sequence, disrupting protocol communication. This typically stems from network instability, protocol mismatches, timeout issues, or configuration problems.

ERROR 1154 occurs when the MySQL server fails to read data from the client connection pipe, typically due to network timeouts, oversized data transfers, or resource exhaustion. Fix it by increasing timeout settings, checking packet sizes, and ensuring proper connection handling.

ERROR 1182 occurs when MySQL cannot rotate or flush its binary, relay, or general query logs due to disk space issues, file permission problems, or I/O errors. Fix by freeing disk space, correcting log directory permissions, or resolving filesystem errors, then retry the FLUSH LOGS operation.

MySQL aborts connections when it detects network issues, timeouts, or packet size violations. This error indicates the server forcefully closed a client session due to unsafe communication conditions.

MySQL ERROR 1146 occurs when a query references a table that MySQL cannot find in the selected database. Common causes include typos in table names, case sensitivity mismatches on Linux systems, querying the wrong database, or the table being accidentally deleted. The fix usually involves verifying the table exists and using the correct database.

MySQL Error 1204 occurs when you try to assign a non-constant expression (function, subquery, or variable) to a SET statement that requires a literal value. Use constant values directly or SELECT...INTO syntax instead.

ERROR 1030 indicates the storage engine encountered a problem reading, writing, or accessing data. Common causes include insufficient disk space, table corruption, file permissions issues, or buffer pool misconfiguration. Most cases resolve by checking disk space and repairing corrupted tables.

ERROR 1180 occurs when MySQL encounters a storage, engine, or replication fault while completing a COMMIT statement. This error signals an underlying problem such as disk space issues, hardware failures, or transaction size limits that prevented the transaction from being persisted.

This error occurs when you try to use a feature—like CHECK constraints, foreign keys, or transactions—that your table's storage engine doesn't support. Switch to InnoDB or remove the unsupported feature to resolve it.

MySQL error 1151 occurs when the number of background INSERT DELAYED threads exceeds the configured limit. This legacy feature is deprecated in modern MySQL versions and typically requires adjusting max_delayed_threads or refactoring to use regular inserts.

This error occurs when trying to modify (ALTER, SET PASSWORD, RENAME) a MySQL user account that doesn't exist in the mysql.user table. The fix is to create the user first or verify the exact user@host combination matches.

MySQL error 1115 occurs when a query references a character set that your MySQL server does not recognize or support. This commonly happens with utf8mb4 on older versions, during database imports, or due to typos in charset names.

This error occurs when you mix aggregate functions (MIN, MAX, COUNT) with non-aggregated columns in SELECT without a GROUP BY clause. Fix it by adding GROUP BY for all non-aggregated columns, using ANY_VALUE(), or ensuring functional dependency on a primary key.

MySQL Error 1144 occurs when a GRANT or REVOKE statement uses privileges that cannot be applied to the specified object. The error typically arises from privilege scope mismatches, missing PROCEDURE/FUNCTION keywords, or attempting to grant global-only privileges at table level. Fixing it requires matching privilege scope to the target object type.

This error occurs when you try to create an index, PRIMARY KEY, or UNIQUE constraint on a BLOB or TEXT column without specifying a prefix length. MySQL requires a fixed number of bytes for indexes, so variable-length text fields need an explicit length specification.

ERROR 1142 occurs when a MySQL user lacks the necessary table-level permissions to execute a command like SELECT, INSERT, UPDATE, or DELETE. Resolve this by granting the appropriate privileges and flushing the privilege cache.

MySQL rejected a data packet that exceeds the max_allowed_packet limit. Increase the max_allowed_packet setting in your MySQL configuration or pass it as a command-line option to handle larger queries, BLOB uploads, or database dumps.

This error occurs when a MySQL client connects from a host that lacks user privileges in the mysql.user table. The fix involves granting appropriate privileges to the user for that specific host or using wildcard permissions with FLUSH PRIVILEGES.

This error indicates that MySQL cannot write to a table because it has reached its size limit or the disk is full. The fix depends on the underlying cause: insufficient disk space, InnoDB configuration limits, or MEMORY table size constraints.

MySQL Error 1211 occurs when a user attempts to create a new user account but lacks the required CREATE USER privilege. This commonly happens in MySQL 8.0+ when using GRANT statements to implicitly create users, which is no longer supported. Fix it by explicitly creating the user first with CREATE USER, then granting privileges separately.

This error occurs when a transaction waits too long (default 50 seconds) to acquire a row lock. It happens due to uncommitted transactions holding locks, missing indexes, or high contention. You can fix it by increasing the timeout, identifying blocking sessions, or optimizing queries.

Error 1181 occurs when MySQL fails to complete a transaction rollback due to internal errors like disk space issues or corrupted undo logs. Fix by checking disk space, repairing tables, and reviewing error logs.

MySQL Error 1105 (ER_UNKNOWN_ERROR) is a generic fallback error that occurs when the MySQL server encounters an internal failure it cannot map to a specific error code. Fix it by checking the error log for details, repairing corrupted tables, verifying plugin compatibility, and checking system resources.

ERROR 1106 occurs when MySQL cannot find the stored procedure you're trying to call. This happens when the procedure doesn't exist, hasn't been created in the current database, or the user lacks EXECUTE permissions.

MySQL ERROR 1183 occurs when InnoDB fails during a checkpoint operation, which flushes modified data from memory to disk. This critical error usually indicates disk I/O problems, insufficient disk space, file system issues, or hardware failures. Resolve it by checking disk health, freeing space, restarting MySQL, and investigating the error log for the underlying cause.

ERROR 1210 occurs when a MySQL function, stored procedure, or prepared statement receives arguments that do not match the function definition in type, count, or format. This commonly happens with prepared statements using LIMIT clauses, UNSIGNED parameters with IFNULL, or DATA DIRECTORY options.

MySQL error 1202 stops replication when the system cannot create slave threads. This typically indicates insufficient memory, thread limits, or other resource constraints. Resolve by checking system resources, adjusting ulimit settings, or restarting the replication process.

MySQL Error 1203 occurs when a user account exceeds its max_user_connections limit. Fix it by increasing the connection limit, optimizing your application code, or closing idle connections.

ERROR 1150 occurs when a DELAYED insert thread cannot acquire the lock it needs to write to a table, often due to conflicting LOCK TABLES or FLUSH statements. This error is rare in modern MySQL (5.7+) since INSERT DELAYED has been deprecated and removed; if you encounter it, switch to regular INSERT statements or batch inserts.

MySQL ERROR 1071 occurs when you create an index that exceeds the maximum allowed key length. This commonly happens with UTF-8 or UTF-8MB4 character sets when indexing VARCHAR columns, or when combining multiple columns in a composite index. The fix depends on your MySQL version and storage engine configuration.

This error occurs when attempting to create a FULLTEXT index on a table with an incompatible storage engine. MySQL requires InnoDB (5.6+) or MyISAM to support FULLTEXT indexes. The fix depends on your MySQL version and application requirements.

This error occurs when you try to use a collation that is incompatible with the specified character set. MySQL requires that each collation belongs to exactly one character set. Fix it by ensuring your character set and collation are compatible and consistent across your database.

MySQL prevents creating stored procedures, functions, or triggers from within another stored routine. This error commonly occurs when using GUI tools like Navicat with incomplete syntax or when attempting recursive routine creation.

MySQL 8.0+ does not allow creating users implicitly through GRANT statements. You must create the user first with CREATE USER, then grant privileges separately.

ERROR 1215 occurs when MySQL cannot create a foreign key constraint due to mismatched data types, missing indexes, or storage engine issues. The fix involves verifying data types match exactly, ensuring the referenced column has an index, and confirming both tables use InnoDB.

Error 1302 occurs when a stored procedure or function has duplicate variable declarations or a local variable conflicts with a parameter name. Rename one of the conflicting identifiers to resolve the issue.

MySQL ERROR 1292 occurs when inserting or updating datetime values in an incorrect format. MySQL expects DATETIME columns in YYYY-MM-DD HH:MM:SS format. Use STR_TO_DATE() to convert misformatted dates or verify your date values match MySQL's strict requirements.

This error occurs when MySQL query results or packets exceed the configured max_allowed_packet limit. Fixing it requires increasing the max_allowed_packet setting on both the client and server, or optimizing queries to produce smaller result sets.

MySQL ERROR 1366 occurs when data cannot be stored in a column due to character set mismatches, type incompatibility, or invalid values. This commonly happens with UTF-8 special characters in latin1 columns, empty strings in integer columns, or numeric precision issues in strict mode.

ERROR 1407 occurs when you provide an invalid SQLSTATE value in a SIGNAL statement within a stored procedure or condition handler. SQLSTATE values must be exactly 5 characters and cannot start with "00" (which indicates success). Use "45000" for user-defined exceptions.

This error occurs when you try to create or update a view with the WITH CHECK OPTION clause, but the view definition makes it non-updatable. Views with aggregate functions, UNION, GROUP BY, or non-mergeable joins cannot use CHECK OPTION.

This error occurs when you attempt to create or alter a MySQL partitioned table with zero partitions. MySQL requires at least one partition for partitioned tables; if you want to remove all partitions, use DROP TABLE instead.

ERROR 1452 occurs when you try to insert or update a child table row with a foreign key value that doesn't exist in the parent table. Fix it by verifying the parent record exists or by ensuring data types match correctly.

ERROR 1419 occurs when creating or updating triggers and stored functions with binary logging enabled, but your MySQL user lacks the SUPER privilege. This is common in managed databases like AWS RDS where SUPER access is restricted.

ERROR 2001 (CR_SOCKET_CREATE_ERROR) occurs when the MySQL client cannot create or access the UNIX socket file used for local connections. This typically happens when the socket file is missing, has incorrect permissions, or the server isn't running.

ERROR 2000 (CR_UNKNOWN_ERROR) is a generic MySQL client error indicating an unknown issue between the client and server. This typically stems from network connectivity problems, version mismatches, or protocol incompatibilities.

MySQL does not support foreign key constraints on partitioned InnoDB tables. You must choose between using partitioning or foreign keys. Remove partitioning or foreign keys, use application-level enforcement, or implement trigger-based validation instead.

ERROR 1411 occurs when you pass an invalid or incorrectly formatted value to a MySQL function, most commonly with date/time functions like STR_TO_DATE(). The error happens when the input format doesn't match the format specifier or when using these functions in stored procedures.

MySQL ERROR 1449 occurs when a stored procedure, view, trigger, or event references a user account (the definer) that no longer exists in the database. This commonly happens after user deletion, database migration, or importing objects from a different server with different user accounts.

MySQL ERROR 1593 indicates replication failure caused by a corrupted relay log file. The relay log stores replication data from the source server, and corruption typically results from hardware failures or unexpected server shutdowns. Fix by resetting the replica and resyncing from the source.

This error occurs when you attempt to execute partition management operations (ADD PARTITION, DROP PARTITION, REORGANIZE PARTITION) on a table that was not created with partitioning enabled. The fix depends on whether you need to add partitioning to the table or remove the partition statement from your script.

MySQL error 1412 occurs when a transaction tries to access a table whose structure has been modified by another session. This happens due to transaction isolation levels and metadata locking conflicts during concurrent DDL operations.

When creating stored functions in MySQL with binary logging enabled, you must explicitly declare how the function interacts with data using DETERMINISTIC, NO SQL, or READS SQL DATA. Without one of these declarations, MySQL raises ERROR 1418 to ensure safe replication.

MySQL ERROR 1217 occurs when you try to delete or update a parent table row that is referenced by foreign keys in child tables. This error protects data integrity by preventing orphaned records. Fix it by using CASCADE options, deleting child records first, or restructuring your foreign key constraints.

MySQL error 1216 occurs when you try to insert or update a row in a child table with a foreign key value that does not exist in the parent table. This happens because MySQL enforces referential integrity to prevent orphaned records.

Error 1273 occurs when your MySQL server doesn't recognize a collation used in your database dump, typically because the dump was created with a newer MySQL version than your target server. You can resolve this by replacing the unsupported collation with a compatible one or upgrading MySQL.

ERROR 1296 indicates a MySQL NDB Cluster error occurred during query execution. This generic error wraps underlying cluster-specific errors like cluster failure, connection loss, or transaction abort. Fixes depend on the specific NDB error code and typically involve verifying cluster status, checking connectivity, or adjusting transaction handling.

MySQL throws error 1406 when an INSERT or UPDATE attempts to write a value longer than the column's defined size. Fix by resizing the column, validating input data, or correcting the data type.

MySQL error 1304 (ER_SP_ALREADY_EXISTS) occurs when you try to create a stored procedure, function, trigger, or event with a name that already exists. The fix is to drop the existing routine first or use CREATE OR REPLACE on MySQL 8.0.13+.

ERROR 1297 indicates a temporary issue in MySQL NDB Cluster that may resolve on retry. Common causes include resource exhaustion, node failures, or overloaded REDO logs. Adjusting cluster configuration parameters can prevent recurrence.

MySQL ERROR 1300 occurs when the database encounters character data that doesn't conform to the expected character set encoding, typically during data import or string operations. This error is resolved by aligning character set configurations and ensuring your data uses the correct encoding.

ERROR 1367 occurs when MySQL tries to parse a value that is out of range or invalid for its data type, commonly with DOUBLE/FLOAT overflow or incorrect spatial data. Fix it by validating data types, checking numeric ranges, and using explicit CAST() functions when needed.

MySQL deadlock errors occur when two or more transactions are waiting for each other to release locks. This guide explains why deadlocks happen and provides actionable strategies to prevent, diagnose, and recover from them.

MySQL Error 1451 occurs when you try to delete or update a row in a parent table that has child rows referencing it through a foreign key constraint. This error protects referential integrity but can be resolved by deleting child rows first, using CASCADE rules, or modifying your constraint strategy.

This error occurs after upgrading MySQL versions or when views contain non-ASCII characters. Views lose metadata context during upgrades. Recreating affected views resolves the issue.

MySQL error 1598 occurs when the server cannot write to the binary log, usually due to transaction isolation level conflicts with statement-based logging or filesystem permission issues. Fixing it requires changing the binary log format or transaction isolation level.

MySQL ERROR 1503 occurs when a unique or primary key on a partitioned table doesn't include all columns used in the partition function. Fix it by adding partitioning columns to your unique keys.

This error occurs when you attempt ALTER TABLE partition operations (DROP, REORGANIZE, ANALYZE, etc.) on partitions that do not exist. The most common cause is automated partition maintenance scripts that reference partition names which no longer exist or have been misspelled. Fix by verifying partition names with SHOW CREATE TABLE before running ALTER TABLE commands.

MySQL Error 1614 (XAER_NOTA) occurs when you try to commit, rollback, or prepare an XA distributed transaction that doesn't exist or has already been completed. This commonly happens in replication scenarios or when another connection already committed the transaction.

This error occurs when you try to use a table option or feature that your storage engine (InnoDB, MyISAM, etc.) does not support. Common causes include deprecated options like ROW_FORMAT=FIXED, unsupported INDEX DIRECTORY clauses, or engine-specific features being used with incompatible engines.

MySQL Error 1317 (ER_QUERY_INTERRUPTED) occurs when a long-running query is forcibly stopped by a KILL command, user interruption (Ctrl+C), or server shutdown. The error typically indicates an external interrupt rather than a query syntax or logic problem. Most cases resolve by allowing queries to complete or implementing proper timeout handling.

MySQL Error 2026 occurs when SSL/TLS handshake fails between client and server, typically due to protocol version mismatches, missing or expired certificates, or configuration mismatches. Fix it by verifying SSL is enabled on both sides, updating client libraries, and ensuring certificate files are accessible.

The MySQL client runs out of memory while processing a query result set or allocating memory for operations. This error occurs when the result set is too large for available client memory, the client application is 32-bit, or when memory is poorly configured.

MySQL Error 1030 "Got an error reading communication packets" occurs when the server cannot properly read data packets from a client connection. Common causes include network interruptions, timeout settings, oversized packets, improperly closed connections, and proxy/load balancer issues. Fixing requires adjusting timeout values, increasing max_allowed_packet, and ensuring proper connection handling.

MySQL Error 2006 (HY000) occurs when the connection between your client and MySQL server is lost. Common causes include connection timeouts, large packets, firewall issues, server crashes, and killed connections. Fixing requires adjusting wait_timeout, increasing max_allowed_packet, checking network connectivity, and verifying server health.

MySQL error 1305 occurs when you try to call a stored function that doesn't exist in the database. This commonly happens due to spaces between the function name and parentheses, incorrect database context, misspelled function names, or calling a stored procedure as a function.

MySQL Error 1364 occurs when inserting or updating a row with a NOT NULL column that has no default value and you fail to provide an explicit value. This error is triggered by MySQL's STRICT_TRANS_TABLES mode. Solutions include providing explicit values, adding defaults to columns, using AUTO_INCREMENT, or altering table definitions.

Window functions in MySQL cannot have ORDER BY redefined when the named window already contains an ORDER BY clause. Remove the redundant ORDER BY from the OVER clause to resolve this error.

MySQL Error 2005 occurs when the MySQL client cannot resolve or connect to the specified hostname. Common causes include typos in the hostname, incorrect hostname format (including protocol), DNS resolution failures, network connectivity issues, or the port being included in the hostname. Fixing requires verifying the hostname spelling, using correct connection syntax, and testing network connectivity.

MySQL ERROR 1566 occurs when you attempt to modify binary log format settings while temporary tables are open in the session. This replication safety mechanism prevents data inconsistency between primary and replica servers. Fixing requires closing all temporary tables before changing binlog_format settings.

MySQL Error 1212 occurs when attempting to create a MERGE table with constituent tables located in different databases. MERGE tables are a special storage engine (MRG_MyISAM) that combines multiple identical MyISAM tables into a single virtual table. This error indicates that all underlying tables must reside in the same database for the MERGE table to function correctly.

MySQL received a network packet larger than the max_allowed_packet limit. Increase max_allowed_packet in your MySQL configuration to handle larger queries, database imports, or BLOB data uploads.

MySQL error 2007 (CR_VERSION_ERROR) occurs when the client and server use incompatible protocol versions or when connecting to the wrong port. This commonly happens with Docker port mapping errors or version mismatches between old clients and new servers. Fixing it requires checking port configuration and ensuring client/server version compatibility.

MySQL Error 2013 occurs when the connection between your client and database server is unexpectedly terminated while executing a query. This happens due to timeouts, oversized packets, network instability, or server overload. Solutions include increasing timeout values, optimizing slow queries, raising max_allowed_packet, and ensuring stable network connectivity.

MySQL Error 2002 occurs when the client cannot locate or access the Unix socket file used for local MySQL connections. This typically means the MySQL server is not running, the socket path is incorrect, or there are permission issues. Fix it by checking if the server is running, verifying socket file location and permissions, or using TCP/IP instead of socket connections.

MySQL Error 2004 (CR_IPSOCK_ERROR) occurs when the MySQL client cannot create a TCP/IP socket to connect to the server. This is a client-side error caused by resource exhaustion, system limits, permission issues, or network configuration problems. Fixing requires checking file descriptor limits, system resources, and network settings.

The MySQL client cannot establish a connection to the MySQL server at the specified host. This commonly occurs when the server isn't running, firewall rules block the connection, the bind address is misconfigured, or network connectivity is unavailable.

ERROR 1205 occurs when a transaction waits longer than the innodb_lock_wait_timeout limit (default 50 seconds) to acquire a row lock held by another transaction. This typically happens when transactions are slow, lock contention is high, or connections are idle but uncommitted. Fix by optimizing query performance, reducing transaction duration, increasing the timeout threshold, or killing blocking connections.

MySQL Error 1034 (ER_NOT_KEYFILE) indicates that MySQL cannot read the index (key) file for a table, usually due to corruption caused by disk issues, crash interruption, or filesystem problems. Common causes include insufficient disk space, permission errors, and MyISAM table corruption. Fixing requires checking disk space, repairing tables, and verifying filesystem health.

MySQL Error 1146 (42S02) occurs when a query tries to access a table that does not exist or cannot be found. Common causes include typos in table names, case sensitivity issues on Linux, selecting the wrong database, corrupted table files, and missing InnoDB data dictionary files. Fixes involve verifying table existence, checking case sensitivity, and repairing corrupted files.

MySQL Error 1040 occurs when the number of concurrent client connections exceeds the server's max_connections limit. This happens due to insufficient connection limits, poor connection management, slow queries, or traffic spikes. Fix by increasing max_connections, implementing connection pooling, adjusting timeout values, and optimizing queries.

MySQL Error 1064 (ER_PARSE_ERROR) occurs when the database parser encounters invalid SQL syntax. Common causes include misspelled keywords, unescaped reserved words, mismatched quotes or parentheses, missing data values, and outdated syntax. Fixing requires careful review of the query, using backticks for reserved words, and validating syntax with tools.

This error occurs when a MySQL query references a column name that doesn't exist in the table or isn't accessible in the current query context. It's one of the most common SQL errors and usually results from typos, missing quotes around string values, or incorrect table aliases.

This error occurs when using a RANGE frame in a MySQL window function without a numeric or temporal ORDER BY column. Window frames with RANGE boundaries require numeric or date/time types to define the range offset.

Error 2 (EE_READ) occurs when MySQL cannot read a file it needs to access, typically due to file permissions, missing files, or filesystem issues. This error prevents database operations and requires checking file access rights and data integrity.

This MySQL client error occurs when attempting to call mysql_real_connect() on a connection handle that is already connected to a MySQL server. The error indicates that your code is reusing a connection handle without properly closing the previous connection first, or attempting to reconnect on an already-active connection.

MySQL Error 2005 occurs when the client cannot resolve or reach the specified MySQL server hostname. This is typically caused by DNS resolution failures, incorrect hostnames, or network connectivity issues.

This MySQL client error occurs when the client process runs out of available memory while fetching or processing query results. The error typically appears when executing queries that return extremely large result sets, processing large BLOB columns, or when the client application has insufficient memory allocation. Breaking queries into smaller chunks, increasing memory limits, or using unbuffered result fetching resolves this issue.

MySQL Error 2001 (CR_SOCKET_CREATE_ERROR) occurs when the MySQL client cannot create or access a UNIX socket file needed for local database connections. This is typically caused by file descriptor limits, permission issues on the socket directory, or missing socket directories. The error occurs at the OS level before reaching the MySQL server.

MySQL throws ER_WINDOW_DUPLICATE_NAME when the WINDOW clause in a SELECT statement defines the same window name more than once. Each named window specification must have a unique identifier to avoid ambiguity when functions reference them.

MySQL error EE_WRITE (3) indicates a failure writing to a file, typically caused by permission problems, non-existent directories, or path issues with the tmpdir setting. This error blocks database operations until the underlying filesystem problem is resolved. Quick fixes include checking permissions, verifying directory existence, and ensuring the MySQL tmpdir points to a valid location.

This MySQL client error occurs when a prepared statement is executed without binding values to all the parameter placeholders (?) defined in the SQL query. The error indicates a mismatch between the expected parameters and the data actually provided.

This MySQL client error occurs when DNS SRV record lookup fails during connection attempts using the mysql_real_connect_dns_srv() function or --dns-srv-name option. The error indicates the DNS server either cannot find the SRV record, the SRV record is misconfigured, or DNS resolution is failing. This commonly affects MySQL 8.0+ clients using DNS SRV for failover and load balancing scenarios.