public RelNode convertSqlToRel(String sql) {
Util.pre(sql != null, "sql != null");
final SqlNode sqlQuery;
try {
sqlQuery = parseQuery(sql);
} catch (Exception e) {
throw Util.newInternal(e); // todo: better handling
}
final RelDataTypeFactory typeFactory = getTypeFactory();
final Prepare.CatalogReader catalogReader = createCatalogReader(typeFactory);
final SqlValidator validator = createValidator(catalogReader, typeFactory);
final SqlToRelConverter converter =
createSqlToRelConverter(validator, catalogReader, typeFactory);
converter.setTrimUnusedFields(true);
final SqlNode validatedQuery = validator.validate(sqlQuery);
final RelNode rel = converter.convertQuery(validatedQuery, false, true);
Util.post(rel != null, "return != null");
return rel;
}
public ParseResult parse(Context context, String sql) {
final JavaTypeFactory typeFactory = context.getTypeFactory();
OptiqCatalogReader catalogReader = new OptiqCatalogReader(context.getRootSchema(), typeFactory);
final OptiqPreparingStmt preparingStmt =
new OptiqPreparingStmt(catalogReader, typeFactory, context.getRootSchema());
preparingStmt.setResultCallingConvention(CallingConvention.ENUMERABLE);
SqlParser parser = new SqlParser(sql);
SqlNode sqlNode;
try {
sqlNode = parser.parseQuery();
} catch (SqlParseException e) {
throw new RuntimeException("parse failed", e);
}
SqlValidator validator =
new SqlValidatorImpl(
SqlStdOperatorTable.instance(), catalogReader, typeFactory, SqlConformance.Default) {};
SqlNode sqlNode1 = validator.validate(sqlNode);
return new ParseResult(sql, sqlNode1, validator.getValidatedNodeType(sqlNode1));
}
@Override
public RelNode expandView(RelDataType rowType, String queryString) {
expansionDepth++;
SqlParser parser = new SqlParser(queryString);
SqlNode sqlNode;
try {
sqlNode = parser.parseQuery();
} catch (SqlParseException e) {
throw new RuntimeException("parse failed", e);
}
SqlValidator validator = getSqlValidator();
SqlNode sqlNode1 = validator.validate(sqlNode);
SqlToRelConverter sqlToRelConverter = getSqlToRelConverter(validator, catalogReader);
RelNode relNode = sqlToRelConverter.convertQuery(sqlNode1, true, false);
--expansionDepth;
return relNode;
}