Package gavo :: Package adql :: Module morphpg

Module morphpg

Morphing ADQL into queries that postgres/pgSphere can understand.

Basically, Postgres support most of the stuff out of the box, and it's just a matter of syntax.

We morph most of the geometry stuff to pgsphere; while some of it would work with plain postgres in a plane approximation, it's certainly not worth the effort.

There's also code to replace certain CONTAINS calls with q3c function calls.

Classes
	PostgresMorphError
	PgSphereCode A node that contains serialized pgsphere expressions plus a coordinate system id for cases in which we must conform.

Functions

morphMiscFunctions(tree)
replaces ADQL functions with (almost) equivalent expressions from postgres or postgastro.

source code

Variables
	__package__ = `'gavo.adql'`

Function Details

morphMiscFunctions(tree)

source code

replaces ADQL functions with (almost) equivalent expressions from postgres or postgastro.

This is a function mostly for unit tests, morphPG does these transformations.