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.
  res = exec_query(<<-SQL.strip_heredoc, "SCHEMA")
    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 = pronamespace
    JOIN pg_catalog.pg_language l ON l.oid = 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
    WHERE n.nspname = ANY (current_schemas(false))
      AND e.extname IS NULL;
  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 119

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 104

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 75

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 90

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 36

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_expr(tgqual, tgrelid) AS tg_condition,
      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;
  SQL

  res.rows.each_with_object({}) do |(name, table, function, timing, ops, for_each, condition, deferrable, initially_deferred), memo|
    attributes = {table: table, function: function, for_each: for_each.to_sym}
    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