dataroaring commented on code in PR #13410:
URL: https://github.com/apache/doris/pull/13410#discussion_r999365287
##########
fe/fe-core/src/main/java/org/apache/doris/catalog/Env.java:
##########
@@ -4030,12 +4031,113 @@ public void replayRenamePartition(TableInfo tableInfo)
throws MetaNotFoundExcept
}
}
+ public void renameColumn(Database db, OlapTable table, String colName,
+ String newColName, boolean isReplay) throws DdlException {
+ if (table.getState() != OlapTableState.NORMAL) {
+ throw new DdlException("Table[" + table.getName() + "] is under "
+ table.getState());
+ }
+
+ if (colName.equalsIgnoreCase(newColName)) {
+ throw new DdlException("Same column name");
+ }
+
+ Map<Long, MaterializedIndexMeta> indexIdToMeta =
table.getIndexIdToMeta();
+ for (Map.Entry<Long, MaterializedIndexMeta> entry :
indexIdToMeta.entrySet()) {
+ // rename column is not implemented for table without column
unique id.
+ if (entry.getValue().getMaxColUniqueId() < 0) {
+ throw new DdlException("not implemented for table without
column unique id");
Review Comment:
same as before, users do not know what is column unique id, they know
property in create table statement.
##########
docs/en/docs/sql-manual/sql-reference/Data-Definition-Statements/Alter/ALTER-TABLE-RENAME.md:
##########
@@ -66,6 +66,18 @@ grammar:
RENAME PARTITION old_partition_name new_partition_name;
```
+4. Modify the column name
+
+grammar:
+
+```sql
+RENAME COLUMN old_column_name new_column_name;
+```
+
+Notice:
+- Currently only tables with column unique id are supported
+
Review Comment:
Currently only tables with column unique id are supported, which are created
with property 'light_schema_change'.
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