Handle HSQLDB specific case insensitive LIKE and bitwise operator support.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 142 def complex_expression_sql_append(sql, op, args) case op when :ILIKE, :"NOT ILIKE" super(sql, (op == :ILIKE ? :LIKE : :"NOT LIKE"), args.map{|v| SQL::Function.new(:ucase, v)}) when :&, :|, :^, :%, :<<, :>>, :'B~' complex_expression_emulate_append(sql, op, args) else super end end
HSQLDB requires recursive CTEs to have column aliases.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 154 def recursive_cte_requires_column_aliases? true end
HSQLDB does support common table expressions, but the support is broken. CTEs operate more like temprorary tables or views, lasting longer than the duration of the expression. CTEs in earlier queries might take precedence over CTEs with the same name in later queries. Also, if any CTE is recursive, all CTEs must be recursive. If you want to use CTEs with HSQLDB, you'll have to manually modify the dataset to allow it.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 168 def supports_cte?(type=:select) false end
HSQLDB does not support IS TRUE.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 173 def supports_is_true? false end
HSQLDB supports lateral subqueries.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 178 def supports_lateral_subqueries? true end
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 184 def empty_from_sql " FROM (VALUES (0))" end
Use string in hex format for blob data.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 189 def literal_blob_append(sql, v) sql << "X'" << v.unpack("H*").first << "'" end
HSQLDB uses FALSE for false values.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 194 def literal_false 'FALSE' end
HSQLDB handles fractional seconds in timestamps, but not in times
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 199 def literal_sqltime(v) v.strftime("'%H:%M:%S'") end
HSQLDB uses TRUE for true values.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 204 def literal_true 'TRUE' end
HSQLDB supports multiple rows in INSERT.
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 209 def multi_insert_sql_strategy :values end
Use WITH RECURSIVE instead of WITH if any of the CTEs is recursive
# File lib/sequel/adapters/jdbc/hsqldb.rb, line 214 def select_with_sql_base opts[:with].any?{|w| w[:recursive]} ? "WITH RECURSIVE " : super end