class Sequel::JDBC::H2::Dataset

Dataset class for H2 datasets accessed via JDBC.

Constants

APOS
HSTAR
ILIKE_PLACEHOLDER
ONLY_OFFSET
TIME_FORMAT

Public Instance Methods

complex_expression_sql_append(sql, op, args) click to toggle source

Emulate the case insensitive LIKE operator and the bitwise operators.

# File lib/sequel/adapters/jdbc/h2.rb, line 162
def complex_expression_sql_append(sql, op, args)
  case op
  when :ILIKE, :"NOT ILIKE"
    super(sql, (op == :ILIKE ? :LIKE : :"NOT LIKE"), [SQL::PlaceholderLiteralString.new(ILIKE_PLACEHOLDER, [args.at(0)]), args.at(1)])
  when :&, :|, :^, :<<, :>>, :'B~'
    complex_expression_emulate_append(sql, op, args)
  else
    super
  end
end
requires_sql_standard_datetimes?() click to toggle source

H2 requires SQL standard datetimes

# File lib/sequel/adapters/jdbc/h2.rb, line 179
def requires_sql_standard_datetimes?
  true
end
supports_derived_column_lists?() click to toggle source

H2 does not support derived column lists

# File lib/sequel/adapters/jdbc/h2.rb, line 174
def supports_derived_column_lists?
  false
end
supports_is_true?() click to toggle source

H2 doesn't support IS TRUE

# File lib/sequel/adapters/jdbc/h2.rb, line 184
def supports_is_true?
  false
end
supports_join_using?() click to toggle source

H2 doesn't support JOIN USING

# File lib/sequel/adapters/jdbc/h2.rb, line 189
def supports_join_using?
  false
end
supports_multiple_column_in?() click to toggle source

H2 doesn't support multiple columns in IN/NOT IN

# File lib/sequel/adapters/jdbc/h2.rb, line 194
def supports_multiple_column_in?
  false
end

Private Instance Methods

literal_blob_append(sql, v) click to toggle source

H2 expects hexadecimal strings for blob values

# File lib/sequel/adapters/jdbc/h2.rb, line 201
def literal_blob_append(sql, v)
  sql << APOS << v.unpack(HSTAR).first << APOS
end
literal_sqltime(v) click to toggle source

H2 handles fractional seconds in timestamps, but not in times

# File lib/sequel/adapters/jdbc/h2.rb, line 206
def literal_sqltime(v)
  v.strftime(TIME_FORMAT)
end
multi_insert_sql_strategy() click to toggle source

H2 supports multiple rows in INSERT.

# File lib/sequel/adapters/jdbc/h2.rb, line 211
def multi_insert_sql_strategy
  :values
end
select_only_offset_sql(sql) click to toggle source
# File lib/sequel/adapters/jdbc/h2.rb, line 215
def select_only_offset_sql(sql)
  sql << ONLY_OFFSET
  literal_append(sql, @opts[:offset])
end
supports_quoted_function_names?() click to toggle source

H2 supports quoted function names.

# File lib/sequel/adapters/jdbc/h2.rb, line 221
def supports_quoted_function_names?
  true
end