<p>MySQL warns that leading spaces are stripped from an identifier, meaning the stored name differs from what you typed.</p>
<p>MySQL Error 1466 ER_REMOVED_SPACES appears when an identifier starts with spaces. MySQL strips the spaces and issues a warning. Remove the spaces or rename the object to clear the warning.</p>
Leading spaces are removed from name '%s'
MySQL Error 1466 with condition ER_REMOVED_SPACES shows the message "Leading spaces are removed from name '%s'". The server issues it as a warning when you create or rename a table, column, index, constraint, or alias whose identifier starts with one or more spaces.
The spaces are silently stripped, and the stored identifier no longer matches the original text. Although execution continues, the mismatch can break scripts, ORMs, or downstream code that expects the exact name.
The warning comes from the parser detecting whitespace at the beginning of an identifier token. It triggers most often during CREATE TABLE, ALTER TABLE, CREATE INDEX, or SELECT alias statements where the name is surrounded by back-ticks or left unquoted.
It also appears after programmatic DDL generation or copy-paste actions in editors that introduce leading spaces. Upgrading to MySQL 8.0 from earlier versions can surface previously hidden issues because stricter parsing now warns on them.
Strip the leading spaces from every identifier that MySQL reports. Use SHOW WARNINGS immediately after the statement to view the corrected name, then rewrite the DDL or query so the supplied text matches that trimmed value.
If you truly need a name that begins with a space, MySQL cannot support it; adopt a different naming convention. Automate linting in your CI pipeline or rely on Galaxy's inline error surfacing to catch the warning before deployment.
During table creation, remove spaces inside the back-ticks around column names, then rerun the statement.
When importing legacy dumps, search-and-replace leading spaces in CREATE statements. A simple sed or editor macro usually suffices.
For generated SQL, patch the template engine or ORM field mapper so it trims names before emitting DDL.
Adopt a strict identifier naming policy that disallows surrounding whitespace. Document the rule in your style guide.
Add a pre-commit hook that uses a regex like ^s+[`"]?w to flag lines starting with spaces followed by identifier delimiters.
Use Galaxy's linting extension, which highlights non-standard names in red and offers one-click cleanup.
Error 1166 ER_WRONG_COLUMN_NAME occurs when an identifier contains illegal characters. Remove or quote the problematic characters.
Error 1059 ER_DUP_KEYNAME fires when an index name duplicates an existing one. Rename the index to resolve.
Error 1170 ER_BLOB_KEY_WITHOUT_LENGTH warns that a BLOB/TEXT column used in an index needs a length specifier. Supply a length in parentheses.
Indentation copied from documentation can slip inside back-ticks around identifiers, leading to this warning.
Template engines concatenating strings sometimes prepend a space before field names, especially when joining with commas.
Old mysqldump outputs may include spaces if the original schema was written carelessly. Restoring them surfaces the warning.
Developers occasionally add a space after a comma and before an identifier, unaware that it will be captured as part of the name.
Triggered when a column name contains illegal characters. Quote or change the name.
Appears when two columns in the same table share the same name. Use unique identifiers.
Raised for duplicate index names within a table. Rename the index.
Occurs when an identifier exceeds the maximum length. Shorten the name.
No. MySQL treats it as a warning, so the statement executes but the name is altered.
No. Even with back-ticks or double quotes, MySQL strips the spaces.
All supported versions 5.7 and 8.0 emit it, but stricter parsing in 8.0 makes it more visible.
Galaxy highlights identifiers with leading spaces in real time and suggests a one-click fix before you run the statement.
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