Add support for SETTINGS clause in ALTER TABLE ADD COLUMN

[Lance726]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 21280275069

Details

• 15 of 23 (65.22%) changed or added relevant lines in 3 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.01%) to 51.371%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
parser/parser_alter.go	6	8	75.0%
parser/walk.go	1	3	33.33%
parser/ast.go	8	12	66.67%

Files with Coverage Reduction	New Missed Lines	%
parser/ast.go	2	40.62%

Totals
Change from base Build 21271794233:	0.01%
Covered Lines:	8037
Relevant Lines:	15645

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💛 - Coveralls

[Copilot]

Pull request overview

This PR adds support for the SETTINGS clause in ALTER TABLE ADD COLUMN statements, allowing users to specify settings like alter_sync when adding columns to tables in ClickHouse.

Changes:

• Added Settings field to the AlterTableAddColumn AST node structure
• Implemented parsing logic for the SETTINGS clause in ALTER TABLE ADD COLUMN statements
• Updated AST walker to traverse the Settings field
• Added test cases demonstrating the new SETTINGS clause functionality

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
parser/ast.go	Added Settings field to AlterTableAddColumn struct and updated End(), String(), and Accept() methods to handle the new field
parser/parser_alter.go	Added parsing logic for the SETTINGS clause in parseAlterTableAddColumn function
parser/walk.go	Added Settings field traversal in the Walk function for AlterTableAddColumn
parser/testdata/ddl/alter_table_add_column.sql	Updated test SQL to include SETTINGS clause with alter_sync setting
parser/testdata/ddl/format/alter_table_add_column.sql	Updated format test file to show origin and formatted SQL with SETTINGS clause
parser/testdata/ddl/output/alter_table_add_column.sql.golden.json	Updated golden JSON output to include Settings field structure
parser/testdata/dml/output/alter_table_with_comment.sql.golden.json	Updated golden JSON to include Settings field (set to null for cases without SETTINGS clause)

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