WL#8066: True bottom-up server parser: refactoring of the HANDLER statement
Affects: Server-8.0
—
Status: Complete
This WL is intended to refactor HANDLER statement-related parser grammar rules in a pure bottom-up style to make it (grammar) context-independent for the better maintainability and extendibility.
Functional requirements
N/A
Non-functional requirements
NF-1: No performance degradation is expected.
Goals
This WL is intended to refactor the grammar of the HANDLER statement in a pure context-independent bottom-up style for the better maintainability and extendibility.
This WL uses the framework and the methodology of the refactoring from the WL#7199 "True bottom-up server parser: common framework for the refactoring".
User Documentation
No user-visible changes. No documentation required.
New parse tree node classes
| Class name | Related syntax |
|---|---|
| PT_handler_open | HANDLER [<db>.]<table> OPEN [<alias>] |
| PT_handler_close | HANDLER <name> CLOSE |
| PT_handler_table_scan | HANDLER <name> READ FIRST/NEXT [WHERE <expr>] [LIMIT <expr>] |
| PT_handler_index_scan | HANDLER <name> READ <index> FIRST/NEXT/PREV/LAST [WHERE <expr>] [LIMIT <expr>] |
| PT_handler_index_range_scan | HANDLER <name> READ <index> EQ/GE/LE/GT/LT '(' <expr> [,...] ')' [WHERE <expr>] [LIMIT <expr>] |
Removal of unneeded "global" variables
- Yacc_state::m_ha_rkey_mode
- LEX::handler_insert_list
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