SELECT NOT EXISTS(SELECT 1 FROM pg_available_extensions WHERE name = 're2') AS no_re2 \gset
\if :no_re2
\echo 'SKIP: re2 extension not available'
\quit
\endif
CREATE SERVER re2_svr FOREIGN DATA WRAPPER clickhouse_fdw OPTIONS(dbname 're2_test');
CREATE USER MAPPING FOR CURRENT_USER SERVER re2_svr;
SELECT clickhouse_raw_query('DROP DATABASE IF EXISTS re2_test');
 clickhouse_raw_query 
----------------------
 
(1 row)

SELECT clickhouse_raw_query('CREATE DATABASE re2_test');
 clickhouse_raw_query 
----------------------
 
(1 row)

SELECT clickhouse_raw_query($$
    CREATE TABLE re2_test.t1 (
        id   Int32,
        val  String
    ) ENGINE = MergeTree ORDER BY id
$$);
 clickhouse_raw_query 
----------------------
 
(1 row)

SELECT clickhouse_raw_query($$
    INSERT INTO re2_test.t1 VALUES
        (1, 'POSIX uses BRE and ERE'),
        (2, 're2 uses finite automata'),
        (3, 'PCRE supports backtracking')
$$);
 clickhouse_raw_query 
----------------------
 
(1 row)

CREATE SCHEMA re2_test;
IMPORT FOREIGN SCHEMA re2_test FROM SERVER re2_svr INTO re2_test;
SET search_path = re2_test, public;
CREATE EXTENSION re2;
EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2match(val, 're2');
                               QUERY PLAN                                
-------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE (match(val, 're2'))
(3 rows)

SELECT * FROM t1 WHERE re2match(val, 're2');
 id |           val            
----+--------------------------
  2 | re2 uses finite automata
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2extract(val, '(re2)') = 're2';
                                      QUERY PLAN                                       
---------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((extract(val, '(re2)') = 're2'))
(3 rows)

SELECT * FROM t1 WHERE re2extract(val, '(re2)') = 're2';
 id |           val            
----+--------------------------
  2 | re2 uses finite automata
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2extractall(val, '[A-Z]+') = ARRAY['POSIX','BRE','ERE'];
                                                QUERY PLAN                                                 
-----------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((extractAll(val, '[A-Z]+') = ['POSIX','BRE','ERE']))
(3 rows)

SELECT * FROM t1 WHERE re2extractall(val, '[A-Z]+') = ARRAY['POSIX','BRE','ERE'];
 id |          val           
----+------------------------
  1 | POSIX uses BRE and ERE
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2regexpextract(val, '(re2)', 1) = 're2';
                                           QUERY PLAN                                           
------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((regexpExtract(val, '(re2)', 1) = 're2'))
(3 rows)

SELECT * FROM t1 WHERE re2regexpextract(val, '(re2)', 1) = 're2';
 id |           val            
----+--------------------------
  2 | re2 uses finite automata
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2extractgroups(val, '(POSIX) uses (BRE)') = ARRAY['POSIX','BRE'];
                                                     QUERY PLAN                                                     
--------------------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((extractGroups(val, '(POSIX) uses (BRE)') = ['POSIX','BRE']))
(3 rows)

SELECT * FROM t1 WHERE re2extractgroups(val, '(POSIX) uses (BRE)') = ARRAY['POSIX','BRE'];
 id |          val           
----+------------------------
  1 | POSIX uses BRE and ERE
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2replaceregexpone(val, 'POSIX', 're2') = 're2 uses BRE and ERE';
                                                       QUERY PLAN                                                       
------------------------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((replaceRegexpOne(val, 'POSIX', 're2') = 're2 uses BRE and ERE'))
(3 rows)

SELECT * FROM t1 WHERE re2replaceregexpone(val, 'POSIX', 're2') = 're2 uses BRE and ERE';
 id |          val           
----+------------------------
  1 | POSIX uses BRE and ERE
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2replaceregexpall(val, ' ', '-') = 're2-uses-finite-automata';
                                                      QUERY PLAN                                                      
----------------------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((replaceRegexpAll(val, ' ', '-') = 're2-uses-finite-automata'))
(3 rows)

SELECT * FROM t1 WHERE re2replaceregexpall(val, ' ', '-') = 're2-uses-finite-automata';
 id |           val            
----+--------------------------
  2 | re2 uses finite automata
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2countmatches(val, 'e') > 0;
                                     QUERY PLAN                                     
------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((countMatches(val, 'e') > 0))
(3 rows)

SELECT * FROM t1 WHERE re2countmatches(val, 'e') > 0;
 id |           val            
----+--------------------------
  1 | POSIX uses BRE and ERE
  2 | re2 uses finite automata
(2 rows)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2countmatchescaseinsensitive(val, 'E') > 0;
                                            QUERY PLAN                                             
---------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((countMatchesCaseInsensitive(val, 'E') > 0))
(3 rows)

SELECT * FROM t1 WHERE re2countmatchescaseinsensitive(val, 'E') > 0;
 id |            val             
----+----------------------------
  1 | POSIX uses BRE and ERE
  2 | re2 uses finite automata
  3 | PCRE supports backtracking
(3 rows)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2multimatchany(val, 'POSIX','PCRE');
                                         QUERY PLAN                                         
--------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE (multiMatchAny(val, ['POSIX','PCRE']))
(3 rows)

SELECT * FROM t1 WHERE re2multimatchany(val, 'POSIX','PCRE');
 id |            val             
----+----------------------------
  1 | POSIX uses BRE and ERE
  3 | PCRE supports backtracking
(2 rows)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2multimatchany(val, VARIADIC ARRAY['POSIX','PCRE']);
                                         QUERY PLAN                                         
--------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE (multiMatchAny(val, ['POSIX','PCRE']))
(3 rows)

SELECT * FROM t1 WHERE re2multimatchany(val, VARIADIC ARRAY['POSIX','PCRE']);
 id |            val             
----+----------------------------
  1 | POSIX uses BRE and ERE
  3 | PCRE supports backtracking
(2 rows)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2multimatchanyindex(val, 'POSIX','PCRE') > 0;
                                              QUERY PLAN                                               
-------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((multiMatchAnyIndex(val, ['POSIX','PCRE']) > 0))
(3 rows)

SELECT * FROM t1 WHERE re2multimatchanyindex(val, 'POSIX','PCRE') > 0;
 id |            val             
----+----------------------------
  1 | POSIX uses BRE and ERE
  3 | PCRE supports backtracking
(2 rows)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2multimatchanyindex(val, VARIADIC ARRAY['POSIX','PCRE']) > 0;
                                              QUERY PLAN                                               
-------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((multiMatchAnyIndex(val, ['POSIX','PCRE']) > 0))
(3 rows)

SELECT * FROM t1 WHERE re2multimatchanyindex(val, 'POSIX','PCRE') > 0;
 id |            val             
----+----------------------------
  1 | POSIX uses BRE and ERE
  3 | PCRE supports backtracking
(2 rows)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2multimatchallindices(val, 'POSIX','PCRE') = ARRAY[1];
                                                QUERY PLAN                                                 
-----------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((multiMatchAllIndices(val, ['POSIX','PCRE']) = [1]))
(3 rows)

SELECT * FROM t1 WHERE re2multimatchallindices(val, 'POSIX','PCRE') = ARRAY[1];
 id |          val           
----+------------------------
  1 | POSIX uses BRE and ERE
(1 row)

EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM t1 WHERE re2multimatchallindices(val, VARIADIC ARRAY['POSIX','PCRE']) = ARRAY[1];
                                                QUERY PLAN                                                 
-----------------------------------------------------------------------------------------------------------
 Foreign Scan on re2_test.t1
   Output: id, val
   Remote SQL: SELECT id, val FROM re2_test.t1 WHERE ((multiMatchAllIndices(val, ['POSIX','PCRE']) = [1]))
(3 rows)

SELECT * FROM t1 WHERE re2multimatchallindices(val, VARIADIC ARRAY['POSIX','PCRE']) = ARRAY[1];
 id |          val           
----+------------------------
  1 | POSIX uses BRE and ERE
(1 row)

DROP EXTENSION re2;
DROP USER MAPPING FOR CURRENT_USER SERVER re2_svr;
SELECT clickhouse_raw_query('DROP DATABASE re2_test');
 clickhouse_raw_query 
----------------------
 
(1 row)

DROP SERVER re2_svr CASCADE;
NOTICE:  drop cascades to foreign table t1