ST_MakeLine
ST_MakeLine creates a linestring from the input geometries.
The dimension of the returned geometry is the same as that of the input geometries. Both input geometries must of the same dimension.
Syntax
ST_MakeLine(geom1, geom2)
Arguments
- geom1
-
A value of data type
GEOMETRYor an expression that evaluates to aGEOMETRYtype. The subtype must bePOINT,LINESTRING, orMULTIPOINT. - geom2
-
A value of data type
GEOMETRYor an expression that evaluates to aGEOMETRYtype. The subtype must bePOINT,LINESTRING, orMULTIPOINT.
Return type
GEOMETRY of subtype LINESTRING.
If geom1 or geom2 is null, then null is returned.
If geom1 and geom2 is the empty point or contains empty points, then these empty points are ignored.
If geom1 and geom2 are empty,
then the empty LINESTRING is returned.
The spatial reference system identifier (SRID) value of the returned geometry is the SRID value of the input geometries.
If geom1 and geom2 have different SRID values, then an error is returned.
If geom1 or geom2 is not a POINT, LINESTRING, or MULTIPOINT, then an error is returned.
If geom1 and geom2 have different dimensions, then an error is returned.
Examples
The following SQL constructs a linestring from two input linestrings.
SELECT ST_MakeLine(ST_GeomFromText('LINESTRING(77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07)'), ST_GeomFromText('LINESTRING(88.29 39.07,88.42 39.26,88.27 39.31,88.29 39.07)'));
st_makeline
-----------
010200000008000000C3F5285C8F52534052B81E85EB113D407B14AE47E15A5340C3F5285C8F423D40E17A14AE475153408FC2F5285C4F3D40C3F5285C8F52534052B81E85EB113D40C3F5285C8F125640295C8FC2F58843407B14AE47E11A5640E17A14AE47A14340E17A14AE4711564048E17A14AEA74340C3F5285C8F125640295C8FC2F5884340
