Update exec_query references to internal_exec_query to handle connection

lib/arjdbc/sqlite3/adapter.rb

@@ -261,7 +261,7 @@ def remove_index(table_name, column_name = nil, **options) # :nodoc:
 
  index_name = index_name_for_remove(table_name, column_name, options)
 
- exec_query "DROP INDEX #{quote_column_name(index_name)}"
+ internal_exec_query "DROP INDEX #{quote_column_name(index_name)}"
  end
 
 
@@ -272,7 +272,7 @@ def remove_index(table_name, column_name = nil, **options) # :nodoc:
  def rename_table(table_name, new_name)
  schema_cache.clear_data_source_cache!(table_name.to_s)
  schema_cache.clear_data_source_cache!(new_name.to_s)
- exec_query "ALTER TABLE #{quote_table_name(table_name)} RENAME TO #{quote_table_name(new_name)}"
+ internal_exec_query "ALTER TABLE #{quote_table_name(table_name)} RENAME TO #{quote_table_name(new_name)}"
  rename_table_indexes(table_name, new_name)
  end
 
@@ -432,7 +432,7 @@ def bind_params_length
  end
 
  def table_structure(table_name)
- structure = exec_query("PRAGMA table_info(#{quote_table_name(table_name)})", "SCHEMA")
+ structure = internal_exec_query("PRAGMA table_info(#{quote_table_name(table_name)})", "SCHEMA")
  raise(ActiveRecord::StatementInvalid, "Could not find table '#{table_name}'") if structure.empty?
  table_structure_with_collation(table_name, structure)
  end