ST_GEOMETRYFROMWKB

Description

Converts a standard figure WKB (Well-known binary) to the corresponding memory geometry

Alias

ST_GEOMFROMWKB

Syntax

ST_GEOMETRYFROMWKB( <wkb>)

Parameters

Parameters	Instructions
`<wkb>`	A binary representation of a geometry, typically generated by ST_AsBinary or other WKB-producing functions. Supported geometry types include all standard types: POINT, LINESTRING,LINE, POLYGON

Return Value

Returns the geometric object corresponding to the input WKB. Returns NULL if the input is NULL or an invalid WKB format.

Examples

POINT Type Argument

select ST_AsText(ST_GeometryFromWKB(ST_AsBinary(ST_Point(24.7, 56.7))));

+------------------------------------------------------------------+
| st_astext(st_geometryfromwkb(st_asbinary(st_point(24.7, 56.7)))) |
+------------------------------------------------------------------+
| POINT (24.7 56.7)                                                |
+------------------------------------------------------------------+

select ST_AsText(ST_GeomFromWKB(ST_AsBinary(ST_Point(24.7, 56.7))));

+--------------------------------------------------------------+
| st_astext(st_geomfromwkb(st_asbinary(st_point(24.7, 56.7)))) |
+--------------------------------------------------------------+
| POINT (24.7 56.7)                                            |
+--------------------------------------------------------------+

LINESTRING Type Argument

select ST_AsText(ST_GeometryFromWKB(ST_AsBinary(ST_GeometryFromText("LINESTRING (1 1, 2 2)"))));

+------------------------------------------------------------------------------------------+
| st_astext(st_geometryfromwkb(st_asbinary(st_geometryfromtext('LINESTRING (1 1, 2 2)')))) |
+------------------------------------------------------------------------------------------+
| LINESTRING (1 1, 2 2)                                                                    |
+------------------------------------------------------------------------------------------+

POLYGON Type Argument

select ST_AsText(ST_GeometryFromWKB(ST_AsBinary(ST_Polygon("POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))"))));

+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| st_astext(st_geometryfromwkb(st_asbinary(st_polygon('POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))')))) |
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| POLYGON ((114.104486 22.547119, 114.093758 22.547753, 114.096504 22.532057, 114.104229 22.539826, 114.106203 22.54268, 114.104486 22.547119))                                                       |
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

select ST_AsText(ST_GeomFromWKB(ST_AsBinary(ST_Polygon("POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))"))));

+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| st_astext(st_geomfromwkb(st_asbinary(st_polygon('POLYGON ((114.104486 22.547119,114.093758 22.547753,114.096504 22.532057,114.104229 22.539826,114.106203 22.542680,114.104486 22.547119))')))) |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| POLYGON ((114.104486 22.547119, 114.093758 22.547753, 114.096504 22.532057, 114.104229 22.539826, 114.106203 22.54268, 114.104486 22.547119))                                                   |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

Input NULL

mysql> SELECT ST_AsText(ST_GeometryFromWKB(NULL));
+-------------------------------------+
| ST_AsText(ST_GeometryFromWKB(NULL)) |
+-------------------------------------+
| NULL                                |
+-------------------------------------+

valid wkb

mysql> select ST_AsText(ST_GeometryFromWKB("\x010300000001000000050000000000000000002440000000000000000000000000000024400000000000002440000000000000000000000000000024400000000000000000000000000000000000000000000024400000000000000000"));
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| ST_AsText(ST_GeometryFromWKB("\x010300000001000000050000000000000000002440000000000000000000000000000024400000000000002440000000000000000000000000000024400000000000000000000000000000000000000000000024400000000000000000")) |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| POLYGON ((10 0, 10 10, 0 10, 0 0, 10 0))                                                                                                                                                                                      |
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

invalid wkb

mysql> select ST_AsText(ST_GeometryFromWKB("\010300000001000000050000000000000000002440000000000000000000000000000024400000000000002440000000000000000000000000000024400000000000000000000000000000000000000000000024400000000000000000"));
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| ST_AsText(ST_GeometryFromWKB("\010300000001000000050000000000000000002440000000000000000000000000000024400000000000002440000000000000000000000000000024400000000000000000000000000000000000000000000024400000000000000000")) |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| NULL                                                                                                                                                                                                                         |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

Description​

Alias​

Syntax​

Parameters​

Return Value​

Examples​