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Fix vertica comments for version 9 (#11479)

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Mayur Singal 2023-05-08 16:34:28 +05:30 committed by GitHub
parent 074418eac3
commit ddc3060184
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1 changed files with 23 additions and 6 deletions
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29
ingestion/src/metadata/ingestion/source/database/vertica/queries.py
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@ -21,22 +21,39 @@ import textwrap
# So to fetch column comments we need to concat the table_name + projection infix + column name. # So to fetch column comments we need to concat the table_name + projection infix + column name.
# Example: querying `v_catalog.comments` we find an object_name for a column in the table vendor_dimension as # Example: querying `v_catalog.comments` we find an object_name for a column in the table vendor_dimension as
# `vendor_dimension_super.vendor_name`. Note how this is the `_super` projection. # `vendor_dimension_super.vendor_name`. Note how this is the `_super` projection.
# Then, our join looks for the match in `vendor_dimension_%.vendor_name`. # Then, our join looks for the match in `vendor_dimension_super.vendor_name`.
# In case there are more than one projections available for a table then we pick up
# comments from any one projection available for table
# Note: This might not suit for all column scenarios, but currently we did not find a better way to join # Note: This might not suit for all column scenarios, but currently we did not find a better way to join
# v_catalog.comments with v_catalog.columns. # v_catalog.comments with v_catalog.columns.
VERTICA_GET_COLUMNS = textwrap.dedent( VERTICA_GET_COLUMNS = textwrap.dedent(
""" """
SELECT WITH
column_projection as
(SELECT
column_name, column_name,
data_type, data_type,
column_default, column_default,
is_nullable, is_nullable,
comment table_name,
FROM v_catalog.columns col table_schema,
proj.projection_name
FROM v_catalog.columns col,
v_catalog.projections proj
where proj.projection_id in (select
min(projection_id)
from v_catalog.projections sub_proj
where col.table_id=sub_proj.anchor_table_id
))
select
column_name,
data_type,
column_default,
is_nullable,
comment from column_projection col
LEFT JOIN v_catalog.comments com LEFT JOIN v_catalog.comments com
ON com.object_type = 'COLUMN' ON com.object_type = 'COLUMN'
AND com.object_id = col.table_id AND com.object_name = CONCAT(CONCAT(col.projection_name,'.'),col.column_name)
AND com.child_object = col.column_name
WHERE lower(table_name) = '{table}' WHERE lower(table_name) = '{table}'
AND {schema_condition} AND {schema_condition}
UNION ALL UNION ALL