public static MaterializedViewInfo addVerticalPartition(
final Table catalog_tbl, final Collection<Column> catalog_cols, final boolean createIndex)
throws Exception {
assert (catalog_cols.isEmpty() == false);
Database catalog_db = ((Database) catalog_tbl.getParent());
String viewName = getNextVerticalPartitionName(catalog_tbl, catalog_cols);
if (debug.get())
LOG.debug(
String.format(
"Adding Vertical Partition %s for %s: %s", viewName, catalog_tbl, catalog_cols));
// Create a new virtual table
Table virtual_tbl = catalog_db.getTables().get(viewName);
if (virtual_tbl == null) {
virtual_tbl = catalog_db.getTables().add(viewName);
}
virtual_tbl.setIsreplicated(true);
virtual_tbl.setMaterializer(catalog_tbl);
virtual_tbl.setSystable(true);
virtual_tbl.getColumns().clear();
// Create MaterializedView and link it to the virtual table
MaterializedViewInfo catalog_view = catalog_tbl.getViews().add(viewName);
catalog_view.setVerticalpartition(true);
catalog_view.setDest(virtual_tbl);
List<Column> indexColumns = new ArrayList<Column>();
Column partition_col = catalog_tbl.getPartitioncolumn();
if (partition_col instanceof VerticalPartitionColumn) {
partition_col = ((VerticalPartitionColumn) partition_col).getHorizontalColumn();
}
if (debug.get()) LOG.debug(catalog_tbl.getName() + " Partition Column: " + partition_col);
int i = 0;
assert (catalog_cols != null);
assert (catalog_cols.isEmpty() == false)
: "No vertical partitioning columns for " + catalog_view.fullName();
for (Column catalog_col : catalog_cols) {
// MaterializedView ColumnRef
ColumnRef catalog_ref = catalog_view.getGroupbycols().add(catalog_col.getName());
catalog_ref.setColumn(catalog_col);
catalog_ref.setIndex(i++);
// VirtualTable Column
Column virtual_col = virtual_tbl.getColumns().add(catalog_col.getName());
virtual_col.setDefaulttype(catalog_col.getDefaulttype());
virtual_col.setDefaultvalue(catalog_col.getDefaultvalue());
virtual_col.setIndex(catalog_col.getIndex());
virtual_col.setNullable(catalog_col.getNullable());
virtual_col.setSize(catalog_col.getSize());
virtual_col.setType(catalog_col.getType());
if (debug.get())
LOG.debug(String.format("Added VerticalPartition column %s", virtual_col.fullName()));
// If they want an index, then we'll make one based on every column except for the column
// that the table is partitioned on
if (createIndex) {
boolean include = true;
if (partition_col instanceof MultiColumn) {
include = (((MultiColumn) partition_col).contains(catalog_col) == false);
} else if (catalog_col.equals(partition_col)) {
include = false;
}
if (include) indexColumns.add(virtual_col);
}
} // FOR
if (createIndex) {
if (indexColumns.isEmpty()) {
Map<String, Object> m = new ListOrderedMap<String, Object>();
m.put("Partition Column", partition_col);
m.put("VP Table Columns", virtual_tbl.getColumns());
m.put("Passed-in Columns", CatalogUtil.debug(catalog_cols));
LOG.error("Failed to find index columns\n" + StringUtil.formatMaps(m));
throw new Exception(String.format("No columns selected for index on %s", viewName));
}
String idxName = "SYS_IDX_" + viewName;
Index virtual_idx = virtual_tbl.getIndexes().get(idxName);
if (virtual_idx == null) {
virtual_idx = virtual_tbl.getIndexes().add(idxName);
}
virtual_idx.getColumns().clear();
IndexType idxType =
(indexColumns.size() == 1 ? IndexType.HASH_TABLE : IndexType.BALANCED_TREE);
virtual_idx.setType(idxType.getValue());
i = 0;
for (Column catalog_col : indexColumns) {
ColumnRef cref = virtual_idx.getColumns().add(catalog_col.getTypeName());
cref.setColumn(catalog_col);
cref.setIndex(i++);
} // FOR
if (debug.get())
LOG.debug(
String.format(
"Created %s index '%s' for vertical partition '%s'", idxType, idxName, viewName));
}
return (catalog_view);
}
