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35 lines
1.7 KiB
MySQL
35 lines
1.7 KiB
MySQL
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CREATE OR REPLACE VIEW hdb_catalog.hdb_column AS
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WITH primary_key_references AS (
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SELECT fkey.table_schema AS src_table_schema
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, fkey.table_name AS src_table_name
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, fkey.columns->>0 AS src_column_name
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, json_agg(json_build_object(
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'schema', fkey.ref_table_table_schema,
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'name', fkey.ref_table
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)) AS ref_tables
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FROM hdb_catalog.hdb_foreign_key_constraint AS fkey
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JOIN hdb_catalog.hdb_primary_key AS pkey
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ON pkey.table_schema = fkey.ref_table_table_schema
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AND pkey.table_name = fkey.ref_table
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AND pkey.columns::jsonb = fkey.ref_columns::jsonb
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WHERE json_array_length(fkey.columns) = 1
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GROUP BY fkey.table_schema
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, fkey.table_name
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, fkey.columns->>0)
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SELECT columns.table_schema
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, columns.table_name
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, columns.column_name AS name
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, columns.udt_name AS type
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, columns.is_nullable
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, columns.ordinal_position
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, coalesce(pkey_refs.ref_tables, '[]') AS primary_key_references
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, col_description(pg_class.oid, columns.ordinal_position) AS description
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FROM information_schema.columns
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JOIN pg_class ON pg_class.relname = columns.table_name
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JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
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AND pg_namespace.nspname = columns.table_schema
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LEFT JOIN primary_key_references AS pkey_refs
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ON columns.table_schema = pkey_refs.src_table_schema
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AND columns.table_name = pkey_refs.src_table_name
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AND columns.column_name = pkey_refs.src_column_name;
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