Change to SPI_execute so we can run SRS query in 'read_only' mode and…

… avoid transaction issues that break parallel mode

git-svn-id: http://svn.osgeo.org/postgis/trunk@16248 b70326c6-7e19-0410-871a-916f4a2858ee

libpgcommon/lwgeom_transform.c

@@ -338,7 +338,7 @@ char* GetProj4StringSPI(int srid)
 
 	/* Execute the lookup query */
 	snprintf(proj4_spi_buffer, 255, "SELECT proj4text FROM spatial_ref_sys WHERE srid = %d LIMIT 1", srid);
-	spi_result = SPI_exec(proj4_spi_buffer, 1);
+	spi_result = SPI_execute(proj4_spi_buffer, true, 1);
 
 	/* Read back the PROJ4 text */
 	if (spi_result == SPI_OK_SELECT && SPI_processed > 0)