Skip to content

Add some helper code for PLpgSQL AST #189

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Aug 24, 2024
Merged

Add some helper code for PLpgSQL AST #189

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
46 changes: 46 additions & 0 deletions src/pgspot/plpgsql.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,46 @@
#
# pglast returns PLpgSQL AST as a nested dict. This file contains some glue code
# to convert the nested dict into a tree of objects.
#
# Disable pylint warnings about class names cause we are trying to match the
# AST names used by PLpgSQL parser.
# pylint: disable-msg=C0103
# pylint: disable-msg=R0903


class PLpgSQLNode:
def __init__(self, raw):
self.type = list(raw.keys())[0]
self.lineno = None
for k, v in raw[self.type].items():
setattr(self, k, build_node(v))

def __str__(self):
return f"{self.type}({self.lineno})"

def __repr__(self):
fields = self.__dict__.copy()
fields.pop("type")
return f"{self.type}({fields})"


class PLpgSQL_var(PLpgSQLNode):
def __init__(self, raw):
self.refname = None
self.datatype = None
super().__init__(raw)

def __str__(self):
return f"Variable(name={self.refname} type={self.datatype})"


def build_node(node):
if isinstance(node, list):
return [build_node(n) for n in node]
if isinstance(node, dict):
name = list(node.keys())[0]
if globals().get(name) is not None:
return globals()[name](node)
return PLpgSQLNode(node)

return node