support stable

src/client/src/tscSQLParser.c

@@ -5335,7 +5335,7 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     tscFieldInfoAppend(&pQueryInfo->fieldsInfo, &f);
   } else if (pAlterSQL->type == TSDB_ALTER_TABLE_CHANGE_COLUMN) {
     if (taosArrayGetSize(pAlterSQL->pAddColumns) != 2) {
-      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), NULL);
+      return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), NULL);
     }
 
     tVariantListItem* pItem = taosArrayGet(pAlterSQL->pAddColumns, 0);
@@ -5343,20 +5343,20 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     SColumnIndex columnIndex = COLUMN_INDEX_INITIALIZER;
     SStrToken    name = {.type = TK_STRING, .z = pItem->pVar.pz, .n = pItem->pVar.nLen};
     if (getColumnIndexByName(pCmd, &name, pQueryInfo, &columnIndex) != TSDB_CODE_SUCCESS) {
-      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg17);
+      return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg17);
     }
 
     SSchema* pColSchema = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, columnIndex.columnIndex);
 
     if (pColSchema->type != TSDB_DATA_TYPE_BINARY && pColSchema->type != TSDB_DATA_TYPE_NCHAR) {
-      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg21);
+      return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg21);
     }
 
     pItem = taosArrayGet(pAlterSQL->pAddColumns, 1);
     int64_t nlen = 0;
 
     if (tVariantDump(&pItem->pVar, (char *)&nlen, TSDB_DATA_TYPE_BIGINT, false) < 0 || nlen <= 0) {
-      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg22);
+      return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg22);
     }
     
     TAOS_FIELD f = tscCreateField(pColSchema->type, name.z, nlen);

src/inc/ttokendef.h

@@ -210,6 +210,7 @@
 
 
 
+
 #define TK_SPACE                          300
 #define TK_COMMENT                        301
 #define TK_ILLEGAL                        302

src/query/inc/sql.y

@@ -824,6 +824,18 @@ cmd ::= ALTER STABLE ids(X) cpxName(F) DROP COLUMN ids(A).     {
     setSqlInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
 
+cmd ::= ALTER STABLE ids(X) cpxName(F) ALTER COLUMN LENGTH ids(A) INTEGER(Z).     {
+    X.n += F.n;
+
+    toTSDBType(A.type);
+    SArray* K = tVariantListAppendToken(NULL, &A, -1);
+    toTSDBType(Z.type);
+    K = tVariantListAppendToken(K, &Z, -1);
+
+    SAlterTableInfo* pAlterTable = tSetAlterTableInfo(&X, K, NULL, TSDB_ALTER_TABLE_CHANGE_COLUMN, TSDB_SUPER_TABLE);
+    setSqlInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
+}
+
 //////////////////////////////////ALTER TAGS statement/////////////////////////////////////
 cmd ::= ALTER STABLE ids(X) cpxName(Y) ADD TAG columnlist(A).        {
     X.n += Y.n;

tests/script/general/parser/alter_column.sim

@@ -38,7 +38,7 @@ endi
 sql create stable stb (ts timestamp, c1 int, c2 binary(10), c3 nchar(10)) tags(id int)
 sql create table tb1 using stb tags(1)
 sql insert into tb1 values (now, 1, "1", "1")
-sql alter table stb alter column length c2 20;
+sql alter stable stb alter column length c2 20;
 if $rows != 0 then
   return -1
 endi
@@ -47,7 +47,9 @@ endi
 
 # try dropping columns that are defined in metric
 sql_error alter table tb alter column length c1 10;
+sql_error alter stable tb alter column length c2 10;
 sql_error alter table tb1 alter column length c2 10;
+sql_error alter stable tb1 alter column length c2 10;
 
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT