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5f274b5527
If returning field contains nested selections then mutation is performed in two steps 1. Mutation is performed with returning columns of any primary key and unique constraints 2. returning fields are queried on rows returned by selecting from table by filtering with column values returned in Step 1. Since mutation takes two courses based on selecting relations in returning field, it is hard to maintain sequence of prepared arguments (PrepArg) generated while resolving returning field. So, we're using txtConverter instead of prepare to resolve mutation fields.
81 lines
2.1 KiB
SQL
81 lines
2.1 KiB
SQL
select
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coalesce(columns.columns, '[]') as columns,
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coalesce(constraints.constraints, '[]') as constraints,
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coalesce(views.view_info, 'null') as view_info
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from
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information_schema.tables as tables
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left outer join (
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select
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c.table_schema,
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c.table_name,
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json_agg(
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json_build_object(
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'name',
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column_name,
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'type',
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udt_name,
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'is_nullable',
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is_nullable :: boolean
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)
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) as columns
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from
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information_schema.columns c
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group by
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c.table_schema,
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c.table_name
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) columns on (
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tables.table_schema = columns.table_schema
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AND tables.table_name = columns.table_name
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)
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left outer join (
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select
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cm.table_schema,
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cm.table_name,
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json_agg(
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json_build_object(
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'type', cm.constraint_type,
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'name', cm.constraint_name,
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'cols', cm.columns
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)
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) as constraints
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from
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(
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select table_name, table_schema,
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constraint_name, columns,
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'PRIMARY KEY' as constraint_type
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from hdb_catalog.hdb_primary_key
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union all
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select table_name, table_schema,
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constraint_name, columns,
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'UNIQUE' as constraint_type
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from hdb_catalog.hdb_unique_constraint
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) cm
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group by
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cm.table_schema,
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cm.table_name
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) constraints on (
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tables.table_schema = constraints.table_schema
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AND tables.table_name = constraints.table_name
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)
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left outer join (
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select
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table_schema,
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table_name,
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json_build_object(
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'is_updatable',
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(is_updatable::boolean OR is_trigger_updatable::boolean),
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'is_deletable',
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(is_updatable::boolean OR is_trigger_deletable::boolean),
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'is_insertable',
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(is_insertable_into::boolean OR is_trigger_insertable_into::boolean)
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) as view_info
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from
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information_schema.views v
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) views on (
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tables.table_schema = views.table_schema
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AND tables.table_name = views.table_name
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)
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where
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tables.table_schema = $1 AND
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tables.table_name = $2
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