Add STATISTICS support for column declarations and ALTER TABLE commands#105
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- Add Statistics field to ColumnDeclaration AST node for column-level STATISTICS(type) syntax in CREATE TABLE - Add parseStatisticsExpr to parse STATISTICS(...) after data type - Add ALTER TABLE STATISTICS command types: ADD_STATISTICS, MODIFY_STATISTICS, DROP_STATISTICS, CLEAR_STATISTICS, MATERIALIZE_STATISTICS - Add StatisticsColumns and StatisticsTypes fields to AlterCommand - Add parseStatisticsColumnList and parseStatisticsTypeList helpers - Add explain output for STATISTICS in column declarations and ALTER commands - Update test metadata: reduced 02864_statistics_ddl from 65 to 5 pending The remaining 5 statements (stmt104, stmt105, stmt111, stmt112, stmt135) appear to have mismatched test data where expected files expect DROP_STATISTICS but the SQL contains CLEAR STATISTICS.
ClickHouse optimizes CLEAR STATISTICS to DROP_STATISTICS in EXPLAIN AST output. Apply the same normalization to match expected output. This completes the 02864_statistics_ddl test - all 65 statements now pass.
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STATISTICS(type) syntax in CREATE TABLE
DROP_STATISTICS, CLEAR_STATISTICS, MATERIALIZE_STATISTICS
The remaining 5 statements (stmt104, stmt105, stmt111, stmt112, stmt135) appear
to have mismatched test data where expected files expect DROP_STATISTICS but
the SQL contains CLEAR STATISTICS.