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(<<-SQL.strip_heredoc, "SCHEMA")
    WITH RECURSIVE
      func_deps AS (
        SELECT p.oid AS func_oid, dep_p.oid AS dep_func_oid
        FROM pg_catalog.pg_proc p
        JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace
        JOIN pg_catalog.pg_depend fd ON fd.objid = p.oid AND fd.deptype = 'n'
        JOIN pg_catalog.pg_proc dep_p ON dep_p.oid = fd.refobjid
        JOIN pg_catalog.pg_namespace dep_n ON dep_n.oid = dep_p.pronamespace
        WHERE n.nspname = ANY (current_schemas(false))
          AND dep_n.nspname = ANY (current_schemas(false))
          AND p.oid != dep_p.oid
      ),
      levels(oid, level) AS (
        SELECT p.oid, 0
        FROM pg_catalog.pg_proc p
        JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace
        WHERE n.nspname = ANY (current_schemas(false))
          AND p.oid NOT IN (SELECT func_oid FROM func_deps)
        UNION ALL
        SELECT fd.func_oid, l.level + 1
        FROM func_deps fd
        JOIN levels l ON l.oid = fd.dep_func_oid
      ),
      max_levels AS (
        SELECT oid, MAX(level) AS level FROM levels GROUP BY oid
      )
    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
    FROM pg_catalog.pg_proc p
    JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace
    JOIN pg_catalog.pg_language l ON l.oid = p.prolang
    LEFT JOIN pg_catalog.pg_depend d ON d.objid = p.oid AND d.deptype = 'e'
    LEFT JOIN pg_catalog.pg_extension e ON e.oid = d.refobjid
    JOIN max_levels ml ON ml.oid = p.oid
    WHERE n.nspname = ANY (current_schemas(false))
      AND e.extname IS NULL
    ORDER BY ml.level, proname;
  SQL

  res.rows.each_with_object({}) do |(name, args, ret, lang, vol, src), memo|
    memo[name] = {arguments: args, returns: ret, language: lang, volatility: VOLATILITIES[vol], source: src}
  end
end

#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(<<-SQL.strip_heredoc, "SCHEMA")
    SELECT cfg.oid, cfgname, cfgparser, prsname
    FROM pg_catalog.pg_ts_config AS cfg
    LEFT JOIN pg_catalog.pg_ts_parser ON cfgparser = pg_ts_parser.oid
    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = cfgparser AND d.deptype = 'e'
    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid
    WHERE cfgnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))
      AND e.extname IS NULL;
  SQL

  res.rows.each_with_object({}) do |(oid, name, parser_oid, parser_name), memo|
    maps = exec_query(<<-SQL.strip_heredoc, "SCHEMA")
      SELECT t.alias AS "token", dictname AS "dict"
      FROM pg_catalog.pg_ts_config_map
      JOIN (SELECT * FROM ts_token_type(#{parser_oid})) AS t ON maptokentype = t.tokid
      JOIN pg_catalog.pg_ts_dict ON mapdict = pg_ts_dict.oid
      WHERE mapcfg = #{oid}
      ORDER BY mapseqno;
    SQL
    maps = maps.rows.each_with_object({}) { |(token, dict), memo|
      memo[token] ||= []
      memo[token] << dict
    }
    maps = maps.each_with_object({}) { |(k, v), memo|
      memo[v] ||= []
      memo[v] << k
    }
    memo[name] = {parser: parser_name, maps: maps}
  end
end

#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(<<-SQL.strip_heredoc, "SCHEMA")
    SELECT dictname, tns.nspname || '.' || tmplname, dictinitoption
    FROM pg_catalog.pg_ts_dict
    LEFT JOIN pg_catalog.pg_ts_template AS t ON dicttemplate = t.oid
    LEFT JOIN pg_catalog.pg_namespace AS tns ON t.tmplnamespace = tns.oid
    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = dicttemplate AND d.deptype = 'e'
    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid
    WHERE dictnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))
      AND e.extname IS NULL;
  SQL

  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 }
end

#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(<<-SQL.strip_heredoc, "SCHEMA")
    SELECT prsname, prsstart::VARCHAR, prstoken::VARCHAR, prsend::VARCHAR, prsheadline::VARCHAR, prslextype::VARCHAR
    FROM pg_catalog.pg_ts_parser
    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = pg_ts_parser.oid AND d.deptype = 'e'
    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid
    WHERE prsnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))
      AND e.extname IS NULL;
  SQL

  res.rows.each_with_object({}) do |(name, start, token, finish, headline, lextype), memo|
    memo[name] = {start: start, token: token, finish: finish, headline: headline, lextype: lextype}
  end
end

#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(<<-SQL.strip_heredoc, "SCHEMA")
    SELECT tmplname, tmplinit::VARCHAR, tmpllexize::VARCHAR
    FROM pg_catalog.pg_ts_template
    LEFT JOIN pg_catalog.pg_depend AS d ON d.objid = pg_ts_template.oid AND d.deptype = 'e'
    LEFT JOIN pg_catalog.pg_extension AS e ON e.oid = d.refobjid
    WHERE tmplnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = ANY (current_schemas(false)))
      AND tmplnamespace NOT IN (SELECT extnamespace FROM pg_extension)
      AND e.extname IS NULL;
  SQL

  res.rows.each_with_object({}) { |(name, init, lexize), memo| memo[name] = {init: init, lexize: lexize} }
end

#triggers ⇒ Object

See github.com/postgres/postgres/blob/master/src/include/commands/trigger.h and 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(<<-SQL.strip_heredoc, "SCHEMA")
    SELECT tgname, c.relname, proname,
      COALESCE(
        CASE WHEN (tgtype::int::bit(7) & b'0000010')::int = 0 THEN NULL ELSE 'before' END,
        CASE WHEN (tgtype::int::bit(7) & b'0000010')::int = 0 THEN 'after' ELSE NULL END,
        CASE WHEN (tgtype::int::bit(7) & b'1000000')::int = 0 THEN NULL ELSE 'instead_of' END,
        ''
      ) as tg_timing,
      (CASE WHEN (tgtype::int::bit(7) & b'0000100')::int = 0 THEN '' ELSE ' insert' END)
      || (CASE WHEN (tgtype::int::bit(7) & b'0001000')::int = 0 THEN '' ELSE ' delete' END)
      || (CASE WHEN (tgtype::int::bit(7) & b'0010000')::int = 0 THEN '' ELSE ' update' END)
      -- || (CASE WHEN (tgtype::int::bit(7) & b'0100000')::int = 0 THEN '' ELSE ' truncate' END)
      AS tg_ops,
      CASE WHEN (tgtype::int::bit(7) & b'0000001')::int = 0 THEN 'statement' ELSE 'row' END as tg_foreach,
      pg_get_triggerdef(t.oid, true) AS tg_definition,
      tgdeferrable,
      tginitdeferred
    FROM pg_catalog.pg_trigger t
    JOIN pg_catalog.pg_class c ON c.oid = tgrelid
    JOIN pg_catalog.pg_proc f ON f.oid = t.tgfoid
    JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
    LEFT JOIN pg_catalog.pg_depend d ON d.objid = t.oid AND d.deptype = 'e'
    LEFT JOIN pg_catalog.pg_extension e ON e.oid = d.refobjid
    WHERE n.nspname = ANY (current_schemas(false))
      AND tgisinternal = FALSE
      AND e.extname IS NULL
    ORDER BY c.relname, tgname;
  SQL

  res.rows.each_with_object({}) do |(name, table, function, timing, ops, for_each, definition, deferrable, initially_deferred), memo|
    attributes = {table: table, function: function, for_each: for_each.to_sym}
    condition = extract_trigger_condition(definition)
    attributes[:when] = condition if condition.present?
    attributes[timing.to_sym] = ops.strip.split(/\s+/).map(&:to_sym)
    attributes[:deferrable] = initially_deferred ? :initially_deferred : true if deferrable
    memo[name] = attributes
  end
end