private static void handleModifyColumnNode(
ModifyColumnNode modNode,
AISBuilder builder,
Table tableCopy,
TypesTranslator typesTranslator) {
AkibanInformationSchema aisCopy = tableCopy.getAIS();
Column column = tableCopy.getColumn(modNode.getColumnName());
assert column != null : modNode.getColumnName();
switch (modNode.getNodeType()) {
case NodeTypes.MODIFY_COLUMN_DEFAULT_NODE:
if (modNode.isAutoincrementColumn()) {
int autoIncType = (int) modNode.getAutoinc_create_or_modify_Start_Increment();
switch (autoIncType) {
case ColumnDefinitionNode.CREATE_AUTOINCREMENT:
{
if (column.getIdentityGenerator() != null) {
throw new ColumnAlreadyGeneratedException(column);
}
TableName name = tableCopy.getName();
TableDDL.setAutoIncrement(
builder, name.getSchemaName(), name.getTableName(), modNode);
}
break;
case ColumnDefinitionNode.MODIFY_AUTOINCREMENT_INC_VALUE:
throw new UnsupportedSQLException("SET INCREMENT BY", modNode);
case ColumnDefinitionNode.MODIFY_AUTOINCREMENT_RESTART_VALUE:
// Note: Also handled above
throw new UnsupportedSQLException("RESTART WITH", modNode);
default:
throw new IllegalStateException("Unknown autoIncType: " + autoIncType);
}
} else {
// DROP DEFAULT will come though as a NULL default, clears both GENERATED and DEFAULT
Sequence seq = column.getIdentityGenerator();
if (seq != null) {
column.setDefaultIdentity(null);
column.setIdentityGenerator(null);
aisCopy.removeSequence(seq.getSequenceName());
}
String[] defaultValueFunction =
TableDDL.getColumnDefault(
modNode, tableCopy.getName().getSchemaName(), tableCopy.getName().getTableName());
column.setDefaultValue(defaultValueFunction[0]);
column.setDefaultFunction(defaultValueFunction[1]);
}
break;
case NodeTypes.MODIFY_COLUMN_CONSTRAINT_NODE: // Type only comes from NULL
column.setType(column.getType().withNullable(true));
break;
case NodeTypes.MODIFY_COLUMN_CONSTRAINT_NOT_NULL_NODE: // Type only comes from NOT NULL
column.setType(column.getType().withNullable(false));
break;
case NodeTypes.MODIFY_COLUMN_TYPE_NODE: // All but [NOT] NULL comes from type
{
TInstance type =
typesTranslator.typeForSQLType(modNode.getType()).withNullable(column.getNullable());
if (false) {
// TODO: Determine whether compatible, does affect sequence, etc.
column.setType(type);
} else {
tableCopy.dropColumn(modNode.getColumnName());
builder.column(
tableCopy.getName().getSchemaName(),
tableCopy.getName().getTableName(),
column.getName(),
column.getPosition(),
type,
false, // column.getInitialAutoIncrementValue() != null
column.getDefaultValue(),
column.getDefaultFunction());
}
}
break;
default:
throw new IllegalStateException("Unexpected node type: " + modNode);
}
}
