public static ChangeLevel alterTable(
DDLFunctions ddlFunctions,
DMLFunctions dmlFunctions,
Session session,
String defaultSchemaName,
AlterTableNode alterTable,
QueryContext context) {
final AkibanInformationSchema curAIS = ddlFunctions.getAIS(session);
final TableName tableName = convertName(defaultSchemaName, alterTable.getObjectName());
final Table table = curAIS.getTable(tableName);
if ((table == null)
&& skipOrThrow(
context, alterTable.getExistenceCheck(), null, new NoSuchTableException(tableName))) {
return null;
}
if (alterTable.isUpdateStatistics()) {
Collection<String> indexes = null;
if (!alterTable.isUpdateStatisticsAll())
indexes = Collections.singletonList(alterTable.getIndexNameForUpdateStatistics());
ddlFunctions.updateTableStatistics(session, tableName, indexes);
return null;
}
if (alterTable.isTruncateTable()) {
dmlFunctions.truncateTable(session, table.getTableId(), alterTable.isCascade());
return null;
}
ChangeLevel level = null;
if ((alterTable.tableElementList != null) && !alterTable.tableElementList.isEmpty()) {
level =
processAlter(
ddlFunctions,
session,
defaultSchemaName,
table,
alterTable.tableElementList,
context);
}
if (level == null) {
throw new UnsupportedSQLException(alterTable.statementToString(), alterTable);
}
return level;
}
