Examples with ExprNode com.questdb.griffin.common.ExprNode used on opensource projects

Example 11 with ExprNode

use of com.questdb.griffin.common.ExprNode in project questdb by bluestreak01.

the class SqlLexerOptimiser method enumerateTableColumns.

public void enumerateTableColumns(QueryModel model) throws ParserException {
    final ObjList<QueryModel> jm = model.getJoinModels();
    // deal with _this_ model first, it will always be the first element in join model list
    if (model.getTableName() != null) {
        RecordMetadata m = model.getTableMetadata(engine, tableLookupSequence);
        // todo: test that this is the case
        for (int i = 0, k = m.getColumnCount(); i < k; i++) {
            model.addField(createColumnAlias(m.getColumnName(i), model));
        }
        // validate explicitly defined timestamp, if it exists
        ExprNode timestamp = model.getTimestamp();
        if (timestamp == null) {
            if (m.getTimestampIndex() != -1) {
                model.setTimestamp(exprNodePool.next().of(ExprNode.LITERAL, m.getColumnQuick(m.getTimestampIndex()).getName(), 0, 0));
            }
        } else {
            int index = m.getColumnIndexQuiet(timestamp.token);
            if (index == -1) {
                throw ParserException.invalidColumn(timestamp.position, timestamp.token);
            } else if (m.getColumnQuick(index).getType() != ColumnType.TIMESTAMP) {
                throw ParserException.$(timestamp.position, "not a TIMESTAMP");
            }
        }
    } else {
        if (model.getNestedModel() != null) {
            enumerateTableColumns(model.getNestedModel());
            // copy columns of nested model onto parent one
            // we must treat sub-query just like we do a table
            model.copyColumnsFrom(model.getNestedModel());
        }
    }
    for (int i = 1, n = jm.size(); i < n; i++) {
        enumerateTableColumns(jm.getQuick(i));
    }
}

Example 12 with ExprNode

use of com.questdb.griffin.common.ExprNode in project questdb by bluestreak01.

the class SqlLexerOptimiser method parseCreateTable.

private ParsedModel parseCreateTable() throws ParserException {
    final CreateTableModel model = createTableModelPool.next();
    model.setName(nextLiteral(lexer.unquote(tok("table name")), lexer.position()));
    CharSequence tok = tok("'(' or 'as'");
    if (Chars.equals(tok, '(')) {
        lexer.unparse();
        parseCreateTableColumns(model);
    } else if (Chars.equals(tok, "as")) {
        parseCreateTableAsSelect(model);
    } else {
        throw errUnexpected(tok);
    }
    while ((tok = optTok()) != null && Chars.equals(tok, ',')) {
        tok = tok("'index' or 'cast'");
        if (Chars.equals(tok, "index")) {
            parseCreateTableIndexDef(model);
        } else if (Chars.equals(tok, "cast")) {
            parseCreateTableCastDef(model);
        } else {
            throw errUnexpected(tok);
        }
    }
    ExprNode timestamp = parseTimestamp(tok);
    if (timestamp != null) {
        // ignore index, validate column
        getCreateTableColumnIndex(model, timestamp.token, timestamp.position);
        model.setTimestamp(timestamp);
        tok = optTok();
    }
    ExprNode partitionBy = parseCreateTablePartition(tok);
    if (partitionBy != null) {
        if (PartitionBy.fromString(partitionBy.token) == -1) {
            throw ParserException.$(partitionBy.position, "'NONE', 'DAY', 'MONTH' or 'YEAR' expected");
        }
        model.setPartitionBy(partitionBy);
        tok = optTok();
    }
    if (tok != null) {
        throw errUnexpected(tok);
    }
    return model;
}

Example 13 with ExprNode

use of com.questdb.griffin.common.ExprNode in project questdb by bluestreak01.

the class SqlLexerOptimiser method setAndGetModelAlias.

private CharSequence setAndGetModelAlias(QueryModel model) {
    CharSequence name = model.getName();
    if (name != null) {
        return name;
    }
    ExprNode alias = makeJoinAlias(defaultAliasCount++);
    model.setAlias(alias);
    return alias.token;
}

Example 14 with ExprNode

use of com.questdb.griffin.common.ExprNode in project questdb by bluestreak01.

the class QueryModel method parseWhereClause.

/*
     * Splits "where" clauses into "and" chunks
     */
public ObjList<ExprNode> parseWhereClause() {
    ExprNode n = getWhereClause();
    // pre-order traversal
    exprNodeStack.clear();
    while (!exprNodeStack.isEmpty() || n != null) {
        if (n != null) {
            if (Chars.equals("and", n.token)) {
                if (n.rhs != null) {
                    exprNodeStack.push(n.rhs);
                }
                n = n.lhs;
            } else {
                addParsedWhereNode(n);
                n = null;
            }
        } else {
            n = exprNodeStack.poll();
        }
    }
    return getParsedWhere();
}

Example 15 with ExprNode

use of com.questdb.griffin.common.ExprNode in project questdb by bluestreak01.

the class QueryModel method addColumn.

public void addColumn(QueryColumn column) {
    columns.add(column);
    final CharSequence alias = column.getAlias();
    final ExprNode ast = column.getAst();
    assert alias != null;
    aliasToColumnMap.put(alias, ast.token);
    columnToAliasMap.put(ast.token, alias);
    columnNameTypeMap.put(alias, ast.type);
}