Class: Sequel::SQLite::Dataset

Inherits:
Dataset show all
Includes:
DatasetMethods
Defined in:
lib/sequel/adapters/sqlite.rb

Overview

Dataset class for SQLite datasets that use the ruby-sqlite3 driver.

Defined Under Namespace

Modules: ArgumentMapper, BindArgumentMethods, PreparedStatementMethods

Constant Summary collapse

PREPARED_ARG_PLACEHOLDER = 
':'.freeze

Constants included from DatasetMethods

Sequel::SQLite::DatasetMethods::COMMA_SEPARATOR, Sequel::SQLite::DatasetMethods::CONSTANT_MAP, Sequel::SQLite::DatasetMethods::EXTRACT_MAP, Sequel::SQLite::DatasetMethods::SELECT_CLAUSE_METHODS

Constants inherited from Dataset

Dataset::ACTION_METHODS, Dataset::AND_SEPARATOR, Dataset::ARG_BLOCK_ERROR_MSG, Dataset::ARRAY_ACCESS_ERROR_MSG, Dataset::BOOL_FALSE, Dataset::BOOL_TRUE, Dataset::COLUMN_CHANGE_OPTS, Dataset::COLUMN_REF_RE1, Dataset::COLUMN_REF_RE2, Dataset::COLUMN_REF_RE3, Dataset::COMMA_SEPARATOR, Dataset::CONDITIONED_JOIN_TYPES, Dataset::COUNT_FROM_SELF_OPTS, Dataset::COUNT_OF_ALL_AS_COUNT, Dataset::DATASET_ALIAS_BASE_NAME, Dataset::DELETE_CLAUSE_METHODS, Dataset::FOR_UPDATE, Dataset::IMPORT_ERROR_MSG, Dataset::INSERT_CLAUSE_METHODS, Dataset::IS_LITERALS, Dataset::IS_OPERATORS, Dataset::JOIN_METHODS, Dataset::MUTATION_METHODS, Dataset::NON_SQL_OPTIONS, Dataset::NOTIMPL_MSG, Dataset::NULL, Dataset::N_ARITY_OPERATORS, Dataset::QUALIFY_KEYS, Dataset::QUERY_METHODS, Dataset::QUESTION_MARK, Dataset::SELECT_CLAUSE_METHODS, Dataset::SQL_WITH, Dataset::STANDARD_TIMESTAMP_FORMAT, Dataset::TIMESTAMP_FORMAT, Dataset::TWO_ARITY_OPERATORS, Dataset::UNCONDITIONED_JOIN_TYPES, Dataset::UPDATE_CLAUSE_METHODS, Dataset::WILDCARD

Instance Attribute Summary

Attributes inherited from Dataset

#db, #identifier_input_method, #identifier_output_method, #opts, #quote_identifiers, #row_proc

Instance Method Summary collapse

Methods included from DatasetMethods

#complex_expression_sql, #constant_sql, #delete, #explain, #having, #quoted_identifier, #select, #supports_intersect_except_all?, #supports_is_true?, #supports_multiple_column_in?, #supports_timestamp_timezones?, #supports_where_true?

Methods inherited from Dataset

#<<, #==, #[], #[]=, #add_graph_aliases, #aliased_expression_sql, #all, #and, #array_sql, #avg, #bind, #boolean_constant_sql, #case_expression_sql, #cast_sql, clause_methods, #clone, #column_all_sql, #columns, #columns!, #complex_expression_sql, #constant_sql, #count, #def_mutation_method, def_mutation_method, #delete, #delete_sql, #distinct, #each, #each_page, #each_server, #empty?, #eql?, #except, #exclude, #exclude_having, #exclude_where, #exists, #filter, #first, #first_source, #first_source_alias, #first_source_table, #for_update, #from, #from_self, #function_sql, #get, #graph, #grep, #group, #group_and_count, #group_by, #hash, #having, #import, #initialize, #insert, #insert_multiple, #insert_sql, #inspect, #intersect, #interval, introspect_all_columns, #invert, #join, #join_clause_sql, #join_on_clause_sql, #join_table, #join_using_clause_sql, #last, #limit, #literal, #lock_style, #map, #max, #min, #multi_insert, #multi_insert_sql, #naked, #negative_boolean_constant_sql, #or, #order, #order_append, #order_by, #order_more, #order_prepend, #ordered_expression_sql, #paginate, #placeholder_literal_string_sql, #print, #provides_accurate_rows_matched?, #qualified_identifier_sql, #qualify, #qualify_to, #qualify_to_first_source, #query, #quote_identifier, #quote_identifiers?, #quote_schema_table, #quoted_identifier, #range, #recursive_cte_requires_column_aliases?, #requires_placeholder_type_specifiers?, #requires_sql_standard_datetimes?, #returning, #reverse, #reverse_order, #row_number_column, #schema_and_table, #select, #select_all, #select_append, #select_group, #select_hash, #select_map, #select_more, #select_order_map, #select_sql, #server, #set, #set_defaults, #set_graph_aliases, #set_overrides, #single_record, #single_value, #split_alias, #sql, #subscript_sql, #sum, #supports_cte?, #supports_cte_in_subqueries?, #supports_distinct_on?, #supports_insert_select?, #supports_intersect_except?, #supports_intersect_except_all?, #supports_is_true?, #supports_join_using?, #supports_modifying_joins?, #supports_multiple_column_in?, #supports_ordered_distinct_on?, #supports_returning?, #supports_select_all_and_column?, #supports_timestamp_timezones?, #supports_timestamp_usecs?, #supports_where_true?, #supports_window_functions?, #to_csv, #to_dot, #to_hash, #truncate, #truncate_sql, #unbind, #unfiltered, #ungraphed, #ungrouped, #union, #unlimited, #unordered, #unused_table_alias, #update, #update_sql, #where, #window_function_sql, #window_sql, #with, #with_recursive, #with_sql

Methods included from Metaprogramming

#meta_def

Methods included from Sequel::SQL::StringMethods

#ilike, #like

Methods included from Sequel::SQL::OrderMethods

#asc, #desc

Methods included from Sequel::SQL::NumericMethods

#+

Methods included from Sequel::SQL::ComplexExpressionMethods

#extract, #sql_boolean, #sql_number, #sql_string

Methods included from Sequel::SQL::CastMethods

#cast, #cast_numeric, #cast_string

Methods included from Sequel::SQL::BooleanMethods

#~

Methods included from Sequel::SQL::AliasMethods

#as

Constructor Details

This class inherits a constructor from Sequel::Dataset

Instance Method Details

#call(type, bind_vars = {}, *values, &block) ⇒ Object

Execute the given type of statement with the hash of values.



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# File 'lib/sequel/adapters/sqlite.rb', line 288

def call(type, bind_vars={}, *values, &block)
  ps = to_prepared_statement(type, values)
  ps.extend(BindArgumentMethods)
  ps.call(bind_vars, &block)
end

#fetch_rows(sql) ⇒ Object

Yield a hash for each row in the dataset.



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# File 'lib/sequel/adapters/sqlite.rb', line 295

def fetch_rows(sql)
  execute(sql) do |result|
    i = -1
    cps = db.conversion_procs
    type_procs = result.types.map{|t| cps[base_type_name(t)]}
    cols = result.columns.map{|c| i+=1; [output_identifier(c), i, type_procs[i]]}
    @columns = cols.map{|c| c.first}
    result.each do |values|
      row = {}
      cols.each do |name,i,type_proc|
        v = values[i]
        if type_proc && v.is_a?(String)
          v = type_proc.call(v)
        end
        row[name] = v
      end
      yield row
    end
  end
end

#prepare(type, name = nil, *values) ⇒ Object

Prepare the given type of query with the given name and store it in the database. Note that a new native prepared statement is created on each call to this prepared statement.



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# File 'lib/sequel/adapters/sqlite.rb', line 319

def prepare(type, name=nil, *values)
  ps = to_prepared_statement(type, values)
  ps.extend(PreparedStatementMethods)
  if name
    ps.prepared_statement_name = name
    db.prepared_statements[name] = ps
  end
  ps.prepared_sql
  ps
end