102 lines
3.4 KiB
Python
102 lines
3.4 KiB
Python
from threading import local
|
|
from typing import Optional, Callable, Dict, Any
|
|
|
|
from dbt.clients.jinja import QueryStringGenerator
|
|
|
|
from dbt.context.manifest import generate_query_header_context
|
|
from dbt.contracts.connection import AdapterRequiredConfig, QueryComment
|
|
from dbt.contracts.graph.compiled import CompileResultNode
|
|
from dbt.contracts.graph.manifest import Manifest
|
|
from dbt.exceptions import RuntimeException
|
|
|
|
|
|
class NodeWrapper:
|
|
def __init__(self, node):
|
|
self._inner_node = node
|
|
|
|
def __getattr__(self, name):
|
|
return getattr(self._inner_node, name, '')
|
|
|
|
|
|
class _QueryComment(local):
|
|
"""A thread-local class storing thread-specific state information for
|
|
connection management, namely:
|
|
- the current thread's query comment.
|
|
- a source_name indicating what set the current thread's query comment
|
|
"""
|
|
def __init__(self, initial):
|
|
self.query_comment: Optional[str] = initial
|
|
self.append = False
|
|
|
|
def add(self, sql: str) -> str:
|
|
if not self.query_comment:
|
|
return sql
|
|
|
|
if self.append:
|
|
# replace last ';' with '<comment>;'
|
|
sql = sql.rstrip()
|
|
if sql[-1] == ';':
|
|
sql = sql[:-1]
|
|
return '{}\n/* {} */;'.format(sql, self.query_comment.strip())
|
|
|
|
return '{}\n/* {} */'.format(sql, self.query_comment.strip())
|
|
|
|
return '/* {} */\n{}'.format(self.query_comment.strip(), sql)
|
|
|
|
def set(self, comment: Optional[str], append: bool):
|
|
if isinstance(comment, str) and '*/' in comment:
|
|
# tell the user "no" so they don't hurt themselves by writing
|
|
# garbage
|
|
raise RuntimeException(
|
|
f'query comment contains illegal value "*/": {comment}'
|
|
)
|
|
self.query_comment = comment
|
|
self.append = append
|
|
|
|
|
|
QueryStringFunc = Callable[[str, Optional[NodeWrapper]], str]
|
|
|
|
|
|
class MacroQueryStringSetter:
|
|
def __init__(self, config: AdapterRequiredConfig, manifest: Manifest):
|
|
self.manifest = manifest
|
|
self.config = config
|
|
|
|
comment_macro = self._get_comment_macro()
|
|
self.generator: QueryStringFunc = lambda name, model: ''
|
|
# if the comment value was None or the empty string, just skip it
|
|
if comment_macro:
|
|
assert isinstance(comment_macro, str)
|
|
macro = '\n'.join((
|
|
'{%- macro query_comment_macro(connection_name, node) -%}',
|
|
comment_macro,
|
|
'{% endmacro %}'
|
|
))
|
|
ctx = self._get_context()
|
|
self.generator = QueryStringGenerator(macro, ctx)
|
|
self.comment = _QueryComment(None)
|
|
self.reset()
|
|
|
|
def _get_comment_macro(self) -> Optional[str]:
|
|
return self.config.query_comment.comment
|
|
|
|
def _get_context(self) -> Dict[str, Any]:
|
|
return generate_query_header_context(self.config, self.manifest)
|
|
|
|
def add(self, sql: str) -> str:
|
|
return self.comment.add(sql)
|
|
|
|
def reset(self):
|
|
self.set('master', None)
|
|
|
|
def set(self, name: str, node: Optional[CompileResultNode]):
|
|
wrapped: Optional[NodeWrapper] = None
|
|
if node is not None:
|
|
wrapped = NodeWrapper(node)
|
|
comment_str = self.generator(name, wrapped)
|
|
|
|
append = False
|
|
if isinstance(self.config.query_comment, QueryComment):
|
|
append = self.config.query_comment.append
|
|
self.comment.set(comment_str, append)
|