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MySQL 8.0 Reference Manual  /  ...  /  DROP SPATIAL REFERENCE SYSTEM Syntax

13.1.28 DROP SPATIAL REFERENCE SYSTEM Syntax

DROP SPATIAL REFERENCE SYSTEM
    [IF EXISTS]
    srid

srid: 32-bit unsigned integer

This statement removes a spatial reference system (SRS) definition from the data dictionary. It requires the SUPER privilege.

If no SRS definition with the SRID value exists, an error occurs unless IF EXISTS is specified. In that case, a warning occurs rather than an error.

If the SRID value is used by some column, an error occurs.

SRID values must be in the range of 32-bit unsigned integers, with these restrictions:

  • SRID 0 is a valid SRID but cannot be used with DROP SPATIAL REFERENCE SYSTEM.

  • If the value is in a reserved SRID range, a warning occurs. Reserved ranges are [0, 32767] (reserved by EPSG), [60,000,000, 69,999,999] (reserved by EPSG), and [2,000,000,000, 2,147,483,647] (reserved by MySQL).

  • Users should not drop SRSs with SRIDs in the reserved ranges. If system-installed SRSs are dropped, the SRS definitions may be recreated for MySQL upgrades.

DROP SPATIAL REFERENCE SYSTEM 4120;

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