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https://github.com/hasura/graphql-engine.git
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a66fb42ce2
* Separate DB and metadata migrations * Refactor Migrate.hs to generate list of migrations at compile-time * Replace ginger with shakespeare to improve performance * Improve migration log messages
46 lines
1.6 KiB
SQL
46 lines
1.6 KiB
SQL
CREATE OR REPLACE VIEW hdb_catalog.hdb_foreign_key_constraint AS
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SELECT
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q.table_schema :: text,
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q.table_name :: text,
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q.constraint_name :: text,
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min(q.constraint_oid) :: integer as constraint_oid,
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min(q.ref_table_table_schema) :: text as ref_table_table_schema,
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min(q.ref_table) :: text as ref_table,
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json_object_agg(ac.attname, afc.attname) as column_mapping,
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min(q.confupdtype) :: text as on_update,
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min(q.confdeltype) :: text as on_delete
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FROM
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(SELECT
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ctn.nspname AS table_schema,
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ct.relname AS table_name,
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r.conrelid AS table_id,
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r.conname as constraint_name,
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r.oid as constraint_oid,
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cftn.nspname AS ref_table_table_schema,
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cft.relname as ref_table,
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r.confrelid as ref_table_id,
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r.confupdtype,
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r.confdeltype,
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UNNEST (r.conkey) AS column_id,
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UNNEST (r.confkey) AS ref_column_id
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FROM
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pg_catalog.pg_constraint r
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JOIN pg_catalog.pg_class ct
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ON r.conrelid = ct.oid
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JOIN pg_catalog.pg_namespace ctn
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ON ct.relnamespace = ctn.oid
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JOIN pg_catalog.pg_class cft
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ON r.confrelid = cft.oid
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JOIN pg_catalog.pg_namespace cftn
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ON cft.relnamespace = cftn.oid
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WHERE
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r.contype = 'f'
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) q
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JOIN pg_catalog.pg_attribute ac
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ON q.column_id = ac.attnum
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AND q.table_id = ac.attrelid
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JOIN pg_catalog.pg_attribute afc
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ON q.ref_column_id = afc.attnum
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AND q.ref_table_id = afc.attrelid
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GROUP BY q.table_schema, q.table_name, q.constraint_name;
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