Examples with ColumnInformation org.apache.ignite.internal.processors.query.ColumnInformation used on opensource projects

Example 1 with ColumnInformation

use of org.apache.ignite.internal.processors.query.ColumnInformation in project ignite by apache.

the class IgniteH2Indexing method columnsInformation.

/**
 * {@inheritDoc}
 */
@Override
public Collection<ColumnInformation> columnsInformation(String schemaNamePtrn, String tblNamePtrn, String colNamePtrn) {
    Collection<ColumnInformation> infos = new ArrayList<>();
    // Gather information about tables.
    schemaMgr.dataTables().stream().filter(t -> matches(t.getSchema().getName(), schemaNamePtrn)).filter(t -> matches(t.getName(), tblNamePtrn)).flatMap(tbl -> {
        IndexColumn affCol = tbl.getAffinityKeyColumn();
        return Stream.of(tbl.getColumns()).filter(Column::getVisible).filter(c -> matches(c.getName(), colNamePtrn)).map(c -> {
            GridQueryProperty prop = tbl.rowDescriptor().type().property(c.getName());
            boolean isAff = affCol != null && c.getColumnId() == affCol.column.getColumnId();
            return new ColumnInformation(c.getColumnId() - QueryUtils.DEFAULT_COLUMNS_COUNT + 1, tbl.getSchema().getName(), tbl.getName(), c.getName(), prop.type(), c.isNullable(), prop.defaultValue(), prop.precision(), prop.scale(), isAff);
        });
    }).forEach(infos::add);
    // Gather information about system views.
    if (matches(QueryUtils.SCHEMA_SYS, schemaNamePtrn)) {
        schemaMgr.systemViews().stream().filter(v -> matches(v.getTableName(), tblNamePtrn)).flatMap(view -> Stream.of(view.getColumns()).filter(c -> matches(c.getName(), colNamePtrn)).map(c -> new ColumnInformation(c.getColumnId() + 1, QueryUtils.SCHEMA_SYS, view.getTableName(), c.getName(), IgniteUtils.classForName(DataType.getTypeClassName(c.getType()), Object.class), c.isNullable(), null, (int) c.getPrecision(), c.getScale(), false))).forEach(infos::add);
    }
    return infos;
}