Module: ActiveRecord::FullTextSearch::PostgreSQLAdapter

Defined in:
lib/active_record/full_text_search/7.2/postgresql_adapter.rb

Constant Summary collapse

VOLATILITIES = 
{
  "i" => :immutable,
  "s" => :stable,
  "v" => :volatile
}.freeze

Instance Method Summary collapse

Instance Method Details

#functions ⇒ Object 



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# File 'lib/active_record/full_text_search/7.2/postgresql_adapter.rb', line 15

def functions
  # List of functions in the current schema with their argument types, return type, language,  immutability, and body.
  # List only functions that don't depend on extensions.
  # Functions are ordered by dependency depth (via pg_depend) so that dependencies come first.
  res = exec_query("    WITH RECURSIVE\n      func_deps AS (\n        SELECT p.oid AS func_oid, dep_p.oid AS dep_func_oid\n        FROM pg_catalog.pg_proc p\n        JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n        JOIN pg_catalog.pg_depend fd ON fd.objid = p.oid AND fd.deptype = 'n'\n        JOIN pg_catalog.pg_proc dep_p ON dep_p.oid = fd.refobjid\n        JOIN pg_catalog.pg_namespace dep_n ON dep_n.oid = dep_p.pronamespace\n        WHERE n.nspname = ANY (current_schemas(false))\n          AND dep_n.nspname = ANY (current_schemas(false))\n          AND p.oid != dep_p.oid\n      ),\n      levels(oid, level) AS (\n        SELECT p.oid, 0\n        FROM pg_catalog.pg_proc p\n        JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n        WHERE n.nspname = ANY (current_schemas(false))\n          AND p.oid NOT IN (SELECT func_oid FROM func_deps)\n        UNION ALL\n        SELECT fd.func_oid, l.level + 1\n        FROM func_deps fd\n        JOIN levels l ON l.oid = fd.dep_func_oid\n      ),\n      max_levels AS (\n        SELECT oid, MAX(level) AS level FROM levels GROUP BY oid\n      )\n    SELECT proname, pg_catalog.pg_get_function_arguments(p.oid) AS argtypes, pg_catalog.pg_get_function_result(p.oid) AS rettype, lanname, provolatile, prosrc\n    FROM pg_catalog.pg_proc p\n    JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n    JOIN pg_catalog.pg_language l ON l.oid = p.prolang\n    LEFT JOIN pg_catalog.pg_depend d ON d.objid = p.oid AND d.deptype = 'e'\n    LEFT JOIN pg_catalog.pg_extension e ON e.oid = d.refobjid\n    JOIN max_levels ml ON ml.oid = p.oid\n    WHERE n.nspname = ANY (current_schemas(false))\n      AND e.extname IS NULL\n    ORDER BY ml.level, proname;\n  SQL\n\n  res.rows.each_with_object({}) do |(name, args, ret, lang, vol, src), memo|\n    memo[name] = {arguments: args, returns: ret, language: lang, volatility: VOLATILITIES[vol], source: src}\n  end\nend\n".strip_heredoc, "SCHEMA")

#text_search_configurations ⇒ Object 



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# File 'lib/active_record/full_text_search/7.2/postgresql_adapter.rb', line 150

def text_search_configurations
  res = exec_query("    SELECT cfg.oid, cfgname, cfgparser, prsname\n    FROM pg_catalog.pg_ts_config AS cfg\n    LEFT JOIN pg_catalog.pg_ts_parser ON cfgparser = pg_ts_parser.oid\n    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = cfgparser AND d.deptype = 'e'\n    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid\n    WHERE cfgnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))\n      AND e.extname IS NULL;\n  SQL\n\n  res.rows.each_with_object({}) do |(oid, name, parser_oid, parser_name), memo|\n    maps = exec_query(<<-SQL.strip_heredoc, \"SCHEMA\")\n      SELECT t.alias AS \"token\", dictname AS \"dict\"\n      FROM pg_catalog.pg_ts_config_map\n      JOIN (SELECT * FROM ts_token_type(\#{parser_oid})) AS t ON maptokentype = t.tokid\n      JOIN pg_catalog.pg_ts_dict ON mapdict = pg_ts_dict.oid\n      WHERE mapcfg = \#{oid}\n      ORDER BY mapseqno;\n    SQL\n    maps = maps.rows.each_with_object({}) { |(token, dict), memo|\n      memo[token] ||= []\n      memo[token] << dict\n    }\n    maps = maps.each_with_object({}) { |(k, v), memo|\n      memo[v] ||= []\n      memo[v] << k\n    }\n    memo[name] = {parser: parser_name, maps: maps}\n  end\nend\n".strip_heredoc, "SCHEMA")

#text_search_dictionaries ⇒ Object 



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# File 'lib/active_record/full_text_search/7.2/postgresql_adapter.rb', line 135

def text_search_dictionaries
  res = exec_query("    SELECT dictname, tns.nspname || '.' || tmplname, dictinitoption\n    FROM pg_catalog.pg_ts_dict\n    LEFT JOIN pg_catalog.pg_ts_template AS t ON dicttemplate = t.oid\n    LEFT JOIN pg_catalog.pg_namespace AS tns ON t.tmplnamespace = tns.oid\n    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = dicttemplate AND d.deptype = 'e'\n    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid\n    WHERE dictnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))\n      AND e.extname IS NULL;\n  SQL\n\n  res.rows.each_with_object({}) { |(name, template, init), memo| memo[name] = options_to_hash(init).reverse_merge(template: template) }.sort_by { |k, _| k.to_s }.sort_by { |_, v| v[:dictionary].nil? ? 0 : 1 }\nend\n".strip_heredoc, "SCHEMA")

#text_search_parsers ⇒ Object 



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# File 'lib/active_record/full_text_search/7.2/postgresql_adapter.rb', line 106

def text_search_parsers
  res = exec_query("    SELECT prsname, prsstart::VARCHAR, prstoken::VARCHAR, prsend::VARCHAR, prsheadline::VARCHAR, prslextype::VARCHAR\n    FROM pg_catalog.pg_ts_parser\n    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = pg_ts_parser.oid AND d.deptype = 'e'\n    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid\n    WHERE prsnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))\n      AND e.extname IS NULL;\n  SQL\n\n  res.rows.each_with_object({}) do |(name, start, token, finish, headline, lextype), memo|\n    memo[name] = {start: start, token: token, finish: finish, headline: headline, lextype: lextype}\n  end\nend\n".strip_heredoc, "SCHEMA")

#text_search_templates ⇒ Object 



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# File 'lib/active_record/full_text_search/7.2/postgresql_adapter.rb', line 121

def text_search_templates
  res = exec_query("    SELECT tmplname, tmplinit::VARCHAR, tmpllexize::VARCHAR\n    FROM pg_catalog.pg_ts_template\n    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = pg_ts_template.oid AND d.deptype = 'e'\n    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid\n    WHERE tmplnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))\n      AND tmplnamespace NOT IN (SELECT extnamespace FROM pg_extension)\n      AND e.extname IS NULL;\n  SQL\n\n  res.rows.each_with_object({}) { |(name, init, lexize), memo| memo[name] = {init: init, lexize: lexize} }\nend\n".strip_heredoc, "SCHEMA")

#triggers ⇒ Object

See https://github.com/postgres/postgres/blob/master/src/include/commands/trigger.h and https://stackoverflow.com/questions/23634550/meanings-of-bits-in-trigger-type-field-tgtype-of-postgres-pg-trigger



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# File 'lib/active_record/full_text_search/7.2/postgresql_adapter.rb', line 65

def triggers
  # List of triggers in the current schema with name, table name, function, timing, op, for each, condition, deferrable, initially_deferred.
  res = exec_query("    SELECT tgname, c.relname, proname,\n      COALESCE(\n        CASE WHEN (tgtype::int::bit(7) & b'0000010')::int = 0 THEN NULL ELSE 'before' END,\n        CASE WHEN (tgtype::int::bit(7) & b'0000010')::int = 0 THEN 'after' ELSE NULL END,\n        CASE WHEN (tgtype::int::bit(7) & b'1000000')::int = 0 THEN NULL ELSE 'instead_of' END,\n        ''\n      ) as tg_timing,\n      (CASE WHEN (tgtype::int::bit(7) & b'0000100')::int = 0 THEN '' ELSE ' insert' END)\n      || (CASE WHEN (tgtype::int::bit(7) & b'0001000')::int = 0 THEN '' ELSE ' delete' END)\n      || (CASE WHEN (tgtype::int::bit(7) & b'0010000')::int = 0 THEN '' ELSE ' update' END)\n      -- || (CASE WHEN (tgtype::int::bit(7) & b'0100000')::int = 0 THEN '' ELSE ' truncate' END)\n      AS tg_ops,\n      CASE WHEN (tgtype::int::bit(7) & b'0000001')::int = 0 THEN 'statement' ELSE 'row' END as tg_foreach,\n      pg_get_triggerdef(t.oid, true) AS tg_definition,\n      tgdeferrable,\n      tginitdeferred\n    FROM pg_catalog.pg_trigger t\n    JOIN pg_catalog.pg_class c ON c.oid = tgrelid\n    JOIN pg_catalog.pg_proc f ON f.oid = t.tgfoid\n    JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace\n    LEFT JOIN pg_catalog.pg_depend d ON d.objid = t.oid AND d.deptype = 'e'\n    LEFT JOIN pg_catalog.pg_extension e ON e.oid = d.refobjid\n    WHERE n.nspname = ANY (current_schemas(false))\n      AND tgisinternal = FALSE\n      AND e.extname IS NULL\n    ORDER BY c.relname, tgname;\n  SQL\n\n  res.rows.each_with_object({}) do |(name, table, function, timing, ops, for_each, definition, deferrable, initially_deferred), memo|\n    attributes = {table: table, function: function, for_each: for_each.to_sym}\n    condition = extract_trigger_condition(definition)\n    attributes[:when] = condition if condition.present?\n    attributes[timing.to_sym] = ops.strip.split(/\\s+/).map(&:to_sym)\n    attributes[:deferrable] = initially_deferred ? :initially_deferred : true if deferrable\n    memo[name] = attributes\n  end\nend\n".strip_heredoc, "SCHEMA")