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namespace NpgsqlRest;

internal class RoutineSourceQuery

{

public const string Query = """

with cte1 as (

select

lower(r.routine_type) as type,

quote_ident(r.specific_schema) as schema,

quote_ident(r.routine_name) as name,

proc.oid as oid,

r.specific_name,

des.description as comment,

proc.proisstrict as is_strict,

proc.provolatile as volatility_option,

proc.proretset as returns_set,

(r.type_udt_schema || '.' || r.type_udt_name)::regtype::text as return_type,

coalesce(

array_agg(quote_ident(p.parameter_name::text) order by p.ordinal_position) filter(where p.parameter_mode = 'IN' or p.parameter_mode = 'INOUT'),

'{}'::text[]

) as in_params,

case when r.data_type = 'USER-DEFINED' then null

else

coalesce(

(array_agg(quote_ident(p.parameter_name::text) order by p.ordinal_position)

filter(where p.parameter_mode = 'INOUT' or p.parameter_mode = 'OUT')),

'{}'::text[]

)

end as out_params,

coalesce(

array_agg(

case when p.data_type = 'bit' then 'varbit' else (p.udt_schema || '.' || p.udt_name)::regtype::text end

order by p.ordinal_position

) filter(where p.parameter_mode = 'IN' or p.parameter_mode = 'INOUT'),

'{}'::text[]

) as in_param_types,

case when r.data_type = 'USER-DEFINED' then null

else

coalesce(

(array_agg(case when p.data_type = 'bit' then 'varbit' else (p.udt_schema || '.' || p.udt_name)::regtype::text end

order by p.ordinal_position)

filter(where p.parameter_mode = 'INOUT' or p.parameter_mode = 'OUT')),

'{}'::text[]

)

end as out_param_types,

coalesce(

array_agg(p.parameter_default order by p.ordinal_position) filter(where p.parameter_mode = 'IN' or p.parameter_mode = 'INOUT'),

'{}'::text[]

) as in_param_defaults,

case when proc.provariadic <> 0 then true else false end as has_variadic,

r.type_udt_schema,

r.type_udt_name,

r.data_type

from

information_schema.routines r

join pg_catalog.pg_proc proc on r.specific_name = proc.proname || '_' || proc.oid

left join pg_catalog.pg_description des on proc.oid = des.objoid

left join information_schema.parameters p on r.specific_name = p.specific_name and r.specific_schema = p.specific_schema

where

r.specific_schema = any(

select

nspname

from

pg_catalog.pg_namespace

where

nspname not like 'pg_%'

and nspname <> 'information_schema'

and ($1 is null or nspname similar to $1)

and ($2 is null or nspname not similar to $2)

and ($3 is null or nspname = any($3))

and ($4 is null or not nspname = any($4))

)

and ($5 is null or r.routine_name similar to $5)

and ($6 is null or r.routine_name not similar to $6)

and ($7 is null or r.routine_name = any($7))

and ($8 is null or not r.routine_name = any($8))

and proc.prokind in ('f', 'p')

and not lower(r.external_language) = any(array['c', 'internal'])

and coalesce(r.type_udt_name, '') <> 'trigger'

group by

r.routine_type, r.specific_schema, r.routine_name,

proc.oid, r.specific_name, des.description,

r.data_type, r.type_udt_schema, r.type_udt_name,

proc.proisstrict, proc.procost, proc.prorows, proc.proparallel, proc.provolatile,

proc.proretset, proc.provariadic

), cte2 as (

select

cte1.schema,

cte1.specific_name,

array_agg(quote_ident(col.column_name) order by col.ordinal_position) as out_params,

array_agg(

case when col.data_type = 'bit' then 'varbit' else (col.udt_schema || '.' || col.udt_name)::regtype::text end

order by col.ordinal_position

) as out_param_types

from

information_schema.columns col

join cte1 on

cte1.data_type = 'USER-DEFINED' and col.table_schema = cte1.type_udt_schema and col.table_name = cte1.type_udt_name

group by

cte1.schema, cte1.specific_name

)

select

type,

cte1.schema,

cte1.name,

comment,

is_strict,

volatility_option,

returns_set,

coalesce(return_type, 'void') as return_type,

coalesce(array_length(coalesce(cte1.out_params, cte2.out_params), 1), 1) as return_record_count,

case

when array_length(coalesce(cte1.out_params, cte2.out_params), 1) is null

then array[cte1.name]::text[]

else coalesce(cte1.out_params, cte2.out_params)

end as return_record_names,

case

when array_length(coalesce(cte1.out_param_types, cte2.out_param_types), 1) is null

then array[return_type]::text[]

else coalesce(cte1.out_param_types, cte2.out_param_types)

end as return_record_types,

coalesce(cte1.out_params, cte2.out_params) = '{}' as is_unnamed_record,

array_length(in_params, 1) as param_count,

in_params as param_names,

in_param_types as param_types,

in_param_defaults as param_defaults,

has_variadic,

pg_get_functiondef(oid) as definition

from cte1

left join cte2 on cte1.schema = cte2.schema and cte1.specific_name = cte2.specific_name

""";

}

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