feat(ingest/sql-queries): Add sql queries source, SqlParsingBuilder, sqlglot_lineage performance optimizations #8494

asikowitz · 2023-07-24T17:36:05Z

Creates a source for generating lineage and usage (stats + operations) from a file containing a list of queries. Uses SqlParsingBuilder which hopefully can be reused for other sources. Adds 2 sqlglot_lineage performance optimizations.
cc @mayurinehate for awareness

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The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
Links to related issues (if applicable)
Tests for the changes have been added/updated (if applicable)
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For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

…r. Add some sqlglot_lineage performance optimizations

asikowitz · 2023-07-24T17:37:12Z

metadata-ingestion/src/datahub/ingestion/graph/client.py

+                if i % 1000 == 0:
+                    logger.debug(f"Loaded {i} schema metadata")
+                try:
+                    schema_metadata = self.get_aspect(urn, SchemaMetadataClass)


We really need a bulk endpoint here. Loading 45k aspects took over an hour

I think you can use the graphql endpoints to bulk fetch schema metadata

We also do have bulk endpoints somewhere, but not sure the exact syntax

asikowitz · 2023-07-24T17:38:02Z

metadata-ingestion/src/datahub/ingestion/source/sql_queries.py

+@config_class(SqlQueriesSourceConfig)
+@support_status(SupportStatus.TESTING)
+class SqlQueriesSource(Source):
+    # TODO: Documentation


This has to get done before I merge. Want to specify what this does and what format the query file is expected to be in

asikowitz · 2023-07-24T17:39:25Z

metadata-ingestion/src/datahub/utilities/sqlglot_lineage.py

@@ -238,6 +253,7 @@ def __init__(
        self.platform = platform
        self.platform_instance = platform_instance
        self.env = env
+        self.urns: Optional[Set[str]] = None


Optimization 1: don't fetch schema metadata for urns that don't exist, which I expect could be a lot e.g. when we filter out urns. This doesn't apply if we're filtering out temporary tables like with bigquery

asikowitz · 2023-07-24T17:40:35Z

metadata-ingestion/src/datahub/utilities/sqlglot_lineage.py

-        schema_info = self._resolve_schema_info(urn)
-        if schema_info:
-            return urn, schema_info
+        if not (self.urns and urn not in self.urns):


I don't really like this logic. Was thinking about creating a "top" set that overrides __contains__ to always return True and setting that as the default instead of None, but could see how that could be confusing. Thoughts? This type of logic comes up in the sql parsing builder too

see my comment above - we should be able to remove this

asikowitz · 2023-07-24T17:41:42Z

metadata-ingestion/src/datahub/utilities/sqlglot_lineage.py

@@ -755,6 +778,7 @@ def _sqlglot_lineage_inner(
    )


+@functools.lru_cache(maxsize=1000)


Optimization 2: saw lots of duplicate queries, think this is an easy performance gain for what shouldn't be too much memory. Can lower the # if we think SqlParsingResults can be very large, or use a file backed dict

yup this makes sense - let's make the 1000 a constant but otherwise is fine

hsheth2 · 2023-07-26T19:02:38Z

metadata-ingestion/src/datahub/ingestion/graph/client.py

+            )
+
+        schema_resolver = self._make_schema_resolver(platform, platform_instance, env)
+        schema_resolver.set_include_urns(urns)


Since you're doing all the schema resolution here, you don't need to pass a DataHubGraph instance into the SchemaResolver

Once you do that, we can remove this set_include_urns thing

hsheth2 · 2023-07-26T19:03:19Z

metadata-ingestion/src/datahub/ingestion/graph/client.py

+                if i % 1000 == 0:
+                    logger.debug(f"Loaded {i} schema metadata")
+                try:
+                    schema_metadata = self.get_aspect(urn, SchemaMetadataClass)


I think you can use the graphql endpoints to bulk fetch schema metadata

We also do have bulk endpoints somewhere, but not sure the exact syntax

hsheth2 · 2023-07-26T19:04:13Z

metadata-ingestion/src/datahub/utilities/sqlglot_lineage.py

+    if schema_resolver.platform == "presto-on-hive":
+        dialect = "hive"
+    else:
+        dialect = schema_resolver.platform


let's extract this into a helper method - I suspect it'll grow / need to be monkeypatched in the future

hsheth2 · 2023-07-26T19:04:40Z

metadata-ingestion/src/datahub/utilities/sqlglot_lineage.py

@@ -755,6 +778,7 @@ def _sqlglot_lineage_inner(
    )


+@functools.lru_cache(maxsize=1000)


yup this makes sense - let's make the 1000 a constant but otherwise is fine

hsheth2 · 2023-07-26T19:05:38Z

metadata-ingestion/src/datahub/utilities/sqlglot_lineage.py

-        schema_info = self._resolve_schema_info(urn)
-        if schema_info:
-            return urn, schema_info
+        if not (self.urns and urn not in self.urns):


see my comment above - we should be able to remove this

hsheth2 · 2023-07-26T19:10:46Z

metadata-ingestion/src/datahub/ingestion/source/sql_queries.py

+    platform: str = Field(
+        description="The platform for which to generate data, e.g. snowflake"
+    )
+    dialect: str = Field(description="The SQL dialect of the queries, e.g. snowflake")


do we need both of these as required fields?

Remove dialect

… schema resolver; remove dialect config param; nits

vercel · 2023-08-23T16:29:43Z

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hsheth2 · 2023-08-23T20:11:53Z

metadata-ingestion/src/datahub/ingestion/graph/client.py

+            urns = set(
+                self.get_urns_by_filter(
+                    entity_types=[DatasetUrn.ENTITY_TYPE],
+                    platform=platform,


there's a bug here - it doesn't respect platform_instance

So it won't actually break anything right -- just add more items to schema resolver than necessary. Do we have the ability to filter on platform instance?

Yep - I'm adding that here #8709

asikowitz · 2023-08-24T14:35:38Z

Merging as I don't think failures are related, sorry if that's not the case

feat(ingest/sql-queries): Add sql queries source and SqlParsingBuilde…

03419b4

…r. Add some sqlglot_lineage performance optimizations

asikowitz requested review from treff7es and hsheth2 July 24, 2023 17:36

github-actions bot added the ingestion PR or Issue related to the ingestion of metadata label Jul 24, 2023

asikowitz commented Jul 24, 2023

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Merge branch 'master' into sql-queries-source

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asikowitz added 3 commits August 23, 2023 12:29

revert

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pr feedback: remove set_include_urns in favor of not passing graph to…

d975fe4

… schema resolver; remove dialect config param; nits

lint

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asikowitz force-pushed the sql-queries-source branch from 8279981 to 4d60b70 Compare August 23, 2023 16:33

Merge branch 'master' into sql-queries-source

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asikowitz merged commit 6659ff2 into datahub-project:master Aug 24, 2023
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asikowitz deleted the sql-queries-source branch August 24, 2023 14:35

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feat(ingest/sql-queries): Add sql queries source, SqlParsingBuilder, sqlglot_lineage performance optimizations #8494

feat(ingest/sql-queries): Add sql queries source, SqlParsingBuilder, sqlglot_lineage performance optimizations #8494

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asikowitz commented Aug 24, 2023

		@@ -755,6 +778,7 @@ def _sqlglot_lineage_inner(
		)


		@functools.lru_cache(maxsize=1000)

feat(ingest/sql-queries): Add sql queries source, SqlParsingBuilder, sqlglot_lineage performance optimizations #8494

feat(ingest/sql-queries): Add sql queries source, SqlParsingBuilder, sqlglot_lineage performance optimizations #8494

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asikowitz commented Jul 24, 2023 • edited Loading

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asikowitz commented Aug 24, 2023

asikowitz commented Jul 24, 2023 •

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