MySQL error 1343 occurs when the server cannot parse a parameter placeholder or default value in a stored program, view, or prepared statement.
MySQL Error 1343: ER_FPARSER_ERROR_IN_PARAMETER means the SQL parser failed to understand a parameter or default value in a routine, view, or prepared statement. Recheck the placeholder syntax, quoting, and data types, then recreate the object or run SET sql_mode=''; is the primary fix.
Error while parsing parameter '%s' (line: '%s')
The message “Error while parsing parameter '%s' (line: '%s')” signals that MySQL’s function parser cannot interpret a parameter definition or default value inside a stored procedure, function, view, trigger, or prepared statement.
The parser stops at the first unrecognizable token, throws error code 1343, and aborts compilation or execution. Fixing the malformed parameter definition lets the statement run normally.
Error 1343 surfaces during CREATE or ALTER statements for routines, views, and triggers, or when PREPARE EXECUTE is called with dynamic SQL that contains faulty parameter placeholders.
Developers typically meet it after copying code between versions, concatenating dynamic SQL strings, or mixing modes like STRICT_TRANS_TABLES and ANSI_QUOTES that change parsing rules.
Unparsed parameters stop object creation, break CI pipelines, and block application deploys. Fast resolution prevents downtime, protects data logic, and keeps automated migrations green.
Invalid placeholder format such as '?name' instead of '?' in PREPARE EXECUTE is a top cause. MySQL expects unnamed question marks.
Mis-quoted default values in routine parameters also trigger error 1343, for example DATE '2024-01-01' in versions before 8.0.19.
Mismatched parentheses or stray commas in parameter lists confuse the parser as well.
First, isolate the faulty statement by running SHOW CREATE PROCEDURE or printing the dynamic SQL. Look for non-standard placeholders, quotes, or extra commas.
Correct the syntax, then recreate the object or rerun PREPARE. If sql_mode includes NO_BACKSLASH_ESCAPES or ANSI_QUOTES, adjust quoting or unset the mode with SET sql_mode=''.
CREATE PROCEDURE with default string missing quotes fails; wrap the default in single quotes.
Dynamic SQL assembled in CONCAT often misses spaces; insert explicit spaces between tokens.
Dump files created in MySQL 5.7 may contain syntax unsupported in 5.6; upgrade target or edit the dump.
Use parameter placeholders only as question marks in prepared statements.
Always quote default literals and escape single quotes with another single quote.
Lock sql_mode in production and development to identical values to avoid version drift.
Error 1064 - generic SQL syntax error - appears when other parts of the statement are malformed. The troubleshooting process is similar.
Error 1336 ER_FPARSER_UNKNOWN_ERROR arises from unknown tokens inside routine bodies; validate loops, IF blocks, and handlers.
Using ?name or :name instead of simple ? in PREPARE EXECUTE statements confuses the parser.
Supplying a literal like 2024-01-01 without quotes in a VARCHAR parameter list triggers error 1343.
Trailing commas, missing parentheses, or misplaced COMMENT clauses inside routine definitions break parsing.
Different sql_mode settings between environments change reserved word and quoting rules, leading to parser failure.
General syntax error indicating malformed SQL anywhere in the statement.
Parser hit an unknown token inside routine body, often caused by bad control flow syntax.
Occurs when inserting without required column values, sometimes seen after resolving 1343 and rerunning scripts.
Older versions before 5.7 are stricter about parameter defaults. MySQL 8.0 added better error messages but the root causes remain identical.
Yes. Galaxy’s real-time parser highlights malformed parameters in the editor, letting you correct them before execution.
Temporarily lowering sql_mode can let a script run but you should still correct the underlying syntax to avoid future failures.
No. MySQL only supports anonymous question-mark placeholders in prepared statements. Use client-side frameworks for named binding.
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