- dsql_req becomes a running request;
- CompiledStatement is derived from dsql_req. The compilation state previously in dsql_req comes to here;
- Rename many "request" parameters to "statement" where type is changed from dsql_req to CompiledStatement.
This changes makes easy the path to support compiled statement cache.
2) Creation of StmtNode
3) Conversion of IN AUTONOMOUS TRANSACTION to InAutonomousTransactionNode (inherited from StmtNode) - it makes this feature almost self-contained
Please do a boot build or at least run blr_table.