chore: remove old Flex/Bison parser code, rename Makefile.new to Makefile (#14)

Delete legacy parser directories (src/mysql_parser/, src/pgsql_parser/,
include/mysql_parser/, include/pgsql_parser/) and examples/. Remove old
Makefile and rename Makefile.new -> Makefile. Update all references in
CI workflow, scripts, and documentation.

Author: renecannao

.github/workflows/ci.yml

@@ -19,15 +19,15 @@ jobs:
       - name: Build and test
         env:
           CXX: ${{ matrix.compiler }}
-        run: make -f Makefile.new clean && make -f Makefile.new all
+        run: make -f Makefile clean && make -f Makefile all
 
   macos:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
 
       - name: Build and test
-        run: make -f Makefile.new clean && make -f Makefile.new all
+        run: make -f Makefile clean && make -f Makefile all
 
   benchmark:
     runs-on: ubuntu-24.04
@@ -36,7 +36,7 @@ jobs:
 
       - name: Build release and run benchmarks
         run: |
-          sed 's/-g -O2/-O3/' Makefile.new > /tmp/Makefile.release
+          sed 's/-g -O2/-O3/' Makefile > /tmp/Makefile.release
           make -f /tmp/Makefile.release clean
           make -f /tmp/Makefile.release lib
           make -f /tmp/Makefile.release test
@@ -55,7 +55,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Build
-        run: make -f Makefile.new all && make -f Makefile.new build-corpus-test
+        run: make -f Makefile all && make -f Makefile build-corpus-test
 
       - name: Test against SQLGlot
         run: |

.gitignore

@@ -31,19 +31,9 @@
 *.out
 *.app
 
-mysql_stdin_parser_example
-set_mysql_example
-mysql_example
-pgsql_example
-libpgsqlparser.a
-src/*_parser/*_parser.tab.c
-src/*_parser/*_parser.tab.h
-src/*_parser/*_lexer.yy.c
-src/*_parser/*_parser.output
-src/*_parser/*_parser.report
-
-# New parser build artifacts
+# Build artifacts
 libsqlparser.a
+sqlengine
 run_tests
 run_bench
 run_bench_compare

CLAUDE.md

@@ -9,18 +9,16 @@ High-performance hand-written recursive descent SQL parser and query engine for
 ## Build Commands
 
 ```bash
-make -f Makefile.new all           # Build library + run all 871 tests
-make -f Makefile.new lib           # Build only libsqlparser.a
-make -f Makefile.new test          # Build + run tests
-make -f Makefile.new bench         # Build + run benchmarks
-make -f Makefile.new bench-compare # Run comparison vs libpg_query (requires libpg_query built)
-make -f Makefile.new build-corpus-test  # Build corpus test harness
-make -f Makefile.new clean         # Remove all build artifacts
+make all           # Build library + run all 871 tests
+make lib           # Build only libsqlparser.a
+make test          # Build + run tests
+make bench         # Build + run benchmarks
+make bench-compare # Run comparison vs libpg_query (requires libpg_query built)
+make build-corpus-test  # Build corpus test harness
+make clean         # Remove all build artifacts
 ```
 
-For release benchmarks: `sed 's/-g -O2/-O3/' Makefile.new > /tmp/Makefile.release && make -f /tmp/Makefile.release bench`
-
-**Note:** The old `Makefile` (no `.new`) is for the legacy Flex/Bison parser — do not use it for new code.
+For release benchmarks: `sed 's/-g -O2/-O3/' Makefile > /tmp/Makefile.release && make -f /tmp/Makefile.release bench`
 
 ## Parser Architecture
 
@@ -51,7 +49,7 @@ Everything is in `namespace sql_parser`. All templates are parameterized on `Dia
 6. Add emit methods to `emitter.h`
 7. Add `is_keyword_as_identifier()` entries in `expression_parser.h` for new keywords
 8. Update `is_alias_start()` blocklist in `table_ref_parser.h` for clause-starting keywords
-9. Write tests in `tests/test_xxx.cpp`, add to `Makefile.new` TEST_SRCS
+9. Write tests in `tests/test_xxx.cpp`, add to `Makefile` TEST_SRCS
 
 ### Expression parsing