[fix] support delimiter

[muir]

Turns out that supporting delimiter goes beyond the change in sqltoken.

[codecov]

Codecov Report

❌ Patch coverage is 97.22222% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 84.60%. Comparing base (152db66) to head (18f1f2d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
lspostgres/postgres.go	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #331      +/-   ##
==========================================
+ Coverage   84.31%   84.60%   +0.28%     
==========================================
  Files          16       16              
  Lines        1556     1585      +29     
==========================================
+ Hits         1312     1341      +29     
  Misses        141      141              
  Partials      103      103              

Flag	Coverage Δ
go_tests	20.75% <0.00%> (-0.39%)	⬇️
mysql_tests	49.71% <83.33%> (+1.01%)	⬆️
pg_tests	53.99% <27.77%> (-0.62%)	⬇️
singlestore_tests	46.59% <83.33%> (+1.06%)	⬆️

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[Copilot]

Pull request overview

Adds execution-time support for MySQL/SingleStore DELIMITER directives and introduces an opt-in migration option to preserve SQL comments so comment-only statements can be executed (primarily for test coverage).

Changes:

• Add libschema.PreserveComments() migration option and plumb it into SQL execution.
• Update Postgres tests to preserve comments for comment-only migrations.
• Add MySQL and SingleStore integration tests covering delimiter-based stored procedure migrations.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
api.go	Adds preserveComments flag + PreserveComments() option/accessor on migrations.
internal/mhelp/run_sql.go	Executes statements from token lists; now conditionally strips comments and strips leading/trailing delimiter directives.
lspostgres/non_tx_test.go	Updates comment-only migration test to use PreserveComments().
lspostgres/bad_test.go	Updates RepeatUntilNoOp/comment-only migration case to use PreserveComments().
lsmysql/mysql_test.go	Adds delimiter migration test + shared helper for delimiter-based migrations.
lsmysql/singlestore_test.go	Adds SingleStore wrapper test to reuse the MySQL delimiter helper.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.