MySQL raises ER_BOOST_GEOMETRY_TURN_INFO_EXCEPTION (3041) when its Boost.Geometry engine cannot calculate turn information because the supplied geometry is invalid.
ER_BOOST_GEOMETRY_TURN_INFO_EXCEPTION occurs when MySQL 5.7.5+ encounters corrupt or self-intersecting geometry that prevents turn-info calculation. Validate and repair the geometry with ST_IsValid or ST_MakeValid, then rerun the query to resolve the error.
ER_BOOST_GEOMETRY_TURN_INFO_EXCEPTION
MySQL throws ER_BOOST_GEOMETRY_TURN_INFO_EXCEPTION when its internal Boost.Geometry library fails to compute turn information on a geometry object. This failure happens only when the geometry sent to a spatial function is malformed.
The error was introduced in MySQL 5.7.5 alongside the GIS rewrite. It carries SQLSTATE HY000, identifying it as a general runtime exception rather than a syntax or permissions issue.
The root cause is always an invalid geometry: self-intersections, duplicate points, wrong ring order, or mismatched SRIDs. When Boost.Geometry attempts to analyse such shapes for spatial operations, it raises an exception that bubbles up as error 3041.
The error frequently appears in queries using ST_Intersection, ST_Union, ST_Buffer, ST_SymDifference, or spatial indexes, because these functions calculate turn information to resolve topological relationships.
First, locate the offending row with ST_IsValid. Then repair it with ST_MakeValid, simplify it, or reload correct data. After fixing, rerun the original query to confirm the error is gone.
A bulk import may introduce corrupt shapefiles - validate immediately after load. Index creation on a GIS column can fail if even one row is bad - repair that row before recreating the index.
In analytic scripts, buffering thousands of polygons can halt mid-run - add a pre-flight validity check in your procedure to bypass or clean invalid shapes automatically.
Always validate geometry at ingestion time, enforce CHECK (ST_IsValid(geom)) constraints, and use Galaxy’s AI copilot to auto-generate import scripts that include validation steps. Keep SRIDs consistent and use ST_SnapToGrid to eliminate precision issues.
ER_GIS_INVALID_DATA (1416) signals general invalid geometry, ER_BOOST_GEOMETRY_EMPTY_INPUT_EXCEPTION (3042) fires when geometry is empty, and ER_GIS_DIFFERENT_SRIDS (3088) warns about SRID mismatch. All can be mitigated with systematic validation and consistent spatial data management.
Self-intersecting polygons or bow-tie shapes loaded from external GIS files.
Incorrect ring orientation (clockwise vs counter-clockwise) violating OGC rules.
Inconsistent or null SRID values assigned during data migration.
Excessive floating-point precision creating nearly overlapping vertices that fool the engine.
Corrupted WKB/WKT strings introduced by manual editing or faulty ETL pipelines.
General invalid geometry error triggered in older versions or simpler functions.
Raised when an operation receives an empty geometry collection.
Occurs when two geometries with different SRIDs participate in one function.
Signals that a spatial function received an argument of the wrong type.
MySQL 5.7 replaced the old GIS engine with Boost.Geometry. Strict topology checks now reveal issues that earlier versions silently ignored.
No. Validation is integral to Boost.Geometry. The only workaround is to fix or exclude invalid rows.
It corrects most issues, but extremely corrupt data may need manual reconstruction or re-import from the source system.
Galaxy’s AI copilot can generate validation scripts and highlight rows that violate spatial rules, reducing debugging time.
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