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-- This program is open source, licensed under the PostgreSQL License.
-- For license terms, see the LICENSE file.
--
-- Copyright (C) 2015-2018: Julien Rouhaud
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION hypopg" to load this file. \quit
SET client_encoding = 'UTF8';
-- General functions
--
CREATE FUNCTION hypopg_reset()
RETURNS void
LANGUAGE C VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_reset';
-- Hypothetical indexes related functions
--
CREATE FUNCTION hypopg_reset_index()
RETURNS void
LANGUAGE C VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_reset_index';
CREATE FUNCTION
hypopg_create_index(IN sql_order text, OUT indexrelid oid, OUT indexname text)
RETURNS SETOF record
LANGUAGE C STRICT VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_create_index';
CREATE FUNCTION
hypopg_drop_index(IN indexid oid)
RETURNS bool
LANGUAGE C STRICT VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_drop_index';
CREATE FUNCTION hypopg(OUT indexname text, OUT indexrelid oid,
OUT indrelid oid, OUT innatts integer,
OUT indisunique boolean, OUT indkey int2vector,
OUT indcollation oidvector, OUT indclass oidvector,
OUT indoption oidvector, OUT indexprs pg_node_tree,
OUT indpred pg_node_tree, OUT amid oid)
RETURNS SETOF record
LANGUAGE c COST 100
AS '$libdir/hypopg', 'hypopg';
CREATE FUNCTION hypopg_list_indexes(OUT indexrelid oid, OUT indexname text, OUT nspname name, OUT relname name, OUT amname name)
RETURNS SETOF record
AS
$_$
SELECT h.indexrelid, h.indexname, n.nspname, c.relname, am.amname
FROM hypopg() h
JOIN pg_class c ON c.oid = h.indrelid
JOIN pg_namespace n ON n.oid = c.relnamespace
JOIN pg_am am ON am.oid = h.amid
$_$
LANGUAGE sql;
CREATE FUNCTION
hypopg_relation_size(IN indexid oid)
RETURNS bigint
LANGUAGE C STRICT VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_relation_size';
CREATE FUNCTION
hypopg_get_indexdef(IN indexid oid)
RETURNS text
LANGUAGE C STRICT VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_get_indexdef';
-- Hypothetical partitioning related functions
--
CREATE FUNCTION
hypopg_add_partition(IN partition_name name, IN partition_of_clause text,
IN partition_by_clause text DEFAULT NULL,
OUT relid oid, OUT tablename text)
RETURNS SETOF record
LANGUAGE C VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_add_partition';
CREATE FUNCTION
hypopg_partition_table(IN tablename regclass, IN partition_by_clause text)
RETURNS bool
LANGUAGE C STRICT VOLATILE COSt 100
AS '$libdir/hypopg', 'hypopg_partition_table';
CREATE FUNCTION hypopg_reset_table()
RETURNS void
LANGUAGE C VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_reset_table';
CREATE FUNCTION hypopg_drop_table(IN relid oid)
RETURNS void
LANGUAGE C VOLATILE COST 100
AS '$libdir/hypopg', 'hypopg_drop_table';
CREATE FUNCTION hypopg_table(OUT relid oid, OUT tablename text,
OUT parentid oid, OUT rootid oid,
OUT partition_by_clause text, OUT partition_bounds text)
RETURNS SETOF record
LANGUAGE c COST 100
AS '$libdir/hypopg', 'hypopg_table';
CREATE FUNCTION hypopg_analyze(IN tablename regclass, IN fraction real = 1)
RETURNS void
LANGUAGE c COST 100
AS '$libdir/hypopg', 'hypopg_analyze';
CREATE FUNCTION hypopg_statistic()
RETURNS SETOF pg_catalog.pg_statistic
LANGUAGE c COST 100
AS '$libdir/hypopg', 'hypopg_statistic';
-- The original anyarray columns must be casted to text, because it's not
-- allowed to create a column of such a type.
DO
$_$
DECLARE
v_has_rls bool;
BEGIN
SELECT COUNT(*) = 1 INTO v_has_rls
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
WHERE c.relname = 'pg_class'
AND a.attname = 'relrowsecurity';
IF v_has_rls THEN
CREATE VIEW hypopg_stats
WITH (security_barrier = true)
AS
SELECT n.nspname AS schemaname,
t.tablename AS tablename,
a.attname,
s.stainherit AS inherited,
s.stanullfrac AS null_frac,
s.stawidth AS avg_width,
s.stadistinct AS n_distinct,
CASE
WHEN s.stakind1 = 1 THEN s.stavalues1::text
WHEN s.stakind2 = 1 THEN s.stavalues2::text
WHEN s.stakind3 = 1 THEN s.stavalues3::text
WHEN s.stakind4 = 1 THEN s.stavalues4::text
WHEN s.stakind5 = 1 THEN s.stavalues5::text
ELSE NULL::text
END AS most_common_vals,
CASE
WHEN s.stakind1 = 1 THEN s.stanumbers1
WHEN s.stakind2 = 1 THEN s.stanumbers2
WHEN s.stakind3 = 1 THEN s.stanumbers3
WHEN s.stakind4 = 1 THEN s.stanumbers4
WHEN s.stakind5 = 1 THEN s.stanumbers5
ELSE NULL::real[]
END AS most_common_freqs,
CASE
WHEN s.stakind1 = 2 THEN s.stavalues1::text
WHEN s.stakind2 = 2 THEN s.stavalues2::text
WHEN s.stakind3 = 2 THEN s.stavalues3::text
WHEN s.stakind4 = 2 THEN s.stavalues4::text
WHEN s.stakind5 = 2 THEN s.stavalues5::text
ELSE NULL::text
END AS histogram_bounds,
CASE
WHEN s.stakind1 = 3 THEN s.stanumbers1[1]
WHEN s.stakind2 = 3 THEN s.stanumbers2[1]
WHEN s.stakind3 = 3 THEN s.stanumbers3[1]
WHEN s.stakind4 = 3 THEN s.stanumbers4[1]
WHEN s.stakind5 = 3 THEN s.stanumbers5[1]
ELSE NULL::real
END AS correlation,
CASE
WHEN s.stakind1 = 4 THEN s.stavalues1::text
WHEN s.stakind2 = 4 THEN s.stavalues2::text
WHEN s.stakind3 = 4 THEN s.stavalues3::text
WHEN s.stakind4 = 4 THEN s.stavalues4::text
WHEN s.stakind5 = 4 THEN s.stavalues5::text
ELSE NULL::text
END AS most_common_elems,
CASE
WHEN s.stakind1 = 4 THEN s.stanumbers1
WHEN s.stakind2 = 4 THEN s.stanumbers2
WHEN s.stakind3 = 4 THEN s.stanumbers3
WHEN s.stakind4 = 4 THEN s.stanumbers4
WHEN s.stakind5 = 4 THEN s.stanumbers5
ELSE NULL::real[]
END AS most_common_elem_freqs,
CASE
WHEN s.stakind1 = 5 THEN s.stanumbers1
WHEN s.stakind2 = 5 THEN s.stanumbers2
WHEN s.stakind3 = 5 THEN s.stanumbers3
WHEN s.stakind4 = 5 THEN s.stanumbers4
WHEN s.stakind5 = 5 THEN s.stanumbers5
ELSE NULL::real[]
END AS elem_count_histogram
FROM hypopg_statistic() s
JOIN hypopg_table() t ON t.relid = s.starelid
JOIN pg_class c ON c.oid = t.rootid
JOIN pg_attribute a ON c.oid = a.attrelid AND a.attnum = s.staattnum
LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
WHERE NOT a.attisdropped
AND has_column_privilege(c.oid, a.attnum, 'select'::text)
AND (c.relrowsecurity = false OR NOT row_security_active(c.oid));
ELSE
CREATE VIEW hypopg_stats
WITH (security_barrier = true)
AS
SELECT n.nspname AS schemaname,
t.tablename AS tablename,
a.attname,
s.stainherit AS inherited,
s.stanullfrac AS null_frac,
s.stawidth AS avg_width,
s.stadistinct AS n_distinct,
CASE
WHEN s.stakind1 = 1 THEN s.stavalues1::text
WHEN s.stakind2 = 1 THEN s.stavalues2::text
WHEN s.stakind3 = 1 THEN s.stavalues3::text
WHEN s.stakind4 = 1 THEN s.stavalues4::text
WHEN s.stakind5 = 1 THEN s.stavalues5::text
ELSE NULL::text
END AS most_common_vals,
CASE
WHEN s.stakind1 = 1 THEN s.stanumbers1
WHEN s.stakind2 = 1 THEN s.stanumbers2
WHEN s.stakind3 = 1 THEN s.stanumbers3
WHEN s.stakind4 = 1 THEN s.stanumbers4
WHEN s.stakind5 = 1 THEN s.stanumbers5
ELSE NULL::real[]
END AS most_common_freqs,
CASE
WHEN s.stakind1 = 2 THEN s.stavalues1::text
WHEN s.stakind2 = 2 THEN s.stavalues2::text
WHEN s.stakind3 = 2 THEN s.stavalues3::text
WHEN s.stakind4 = 2 THEN s.stavalues4::text
WHEN s.stakind5 = 2 THEN s.stavalues5::text
ELSE NULL::text
END AS histogram_bounds,
CASE
WHEN s.stakind1 = 3 THEN s.stanumbers1[1]
WHEN s.stakind2 = 3 THEN s.stanumbers2[1]
WHEN s.stakind3 = 3 THEN s.stanumbers3[1]
WHEN s.stakind4 = 3 THEN s.stanumbers4[1]
WHEN s.stakind5 = 3 THEN s.stanumbers5[1]
ELSE NULL::real
END AS correlation,
CASE
WHEN s.stakind1 = 4 THEN s.stavalues1::text
WHEN s.stakind2 = 4 THEN s.stavalues2::text
WHEN s.stakind3 = 4 THEN s.stavalues3::text
WHEN s.stakind4 = 4 THEN s.stavalues4::text
WHEN s.stakind5 = 4 THEN s.stavalues5::text
ELSE NULL::text
END AS most_common_elems,
CASE
WHEN s.stakind1 = 4 THEN s.stanumbers1
WHEN s.stakind2 = 4 THEN s.stanumbers2
WHEN s.stakind3 = 4 THEN s.stanumbers3
WHEN s.stakind4 = 4 THEN s.stanumbers4
WHEN s.stakind5 = 4 THEN s.stanumbers5
ELSE NULL::real[]
END AS most_common_elem_freqs,
CASE
WHEN s.stakind1 = 5 THEN s.stanumbers1
WHEN s.stakind2 = 5 THEN s.stanumbers2
WHEN s.stakind3 = 5 THEN s.stanumbers3
WHEN s.stakind4 = 5 THEN s.stanumbers4
WHEN s.stakind5 = 5 THEN s.stanumbers5
ELSE NULL::real[]
END AS elem_count_histogram
FROM hypopg_statistic() s
JOIN hypopg_table() t ON t.relid = s.starelid
JOIN pg_class c ON c.oid = t.rootid
JOIN pg_attribute a ON c.oid = a.attrelid AND a.attnum = s.staattnum
LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
WHERE NOT a.attisdropped
AND has_column_privilege(c.oid, a.attnum, 'select'::text);
END IF;
END;
$_$ language plpgsql;