Examples with OracleSelectQueryBlock com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock used on opensource projects

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Example 11 with OracleSelectQueryBlock

use of com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock in project Mycat_plus by coderczp.

the class DruidSelectOracleParser method parseNativePageSql.

protected void parseNativePageSql(SQLStatement stmt, RouteResultset rrs, OracleSelectQueryBlock mysqlSelectQuery, SchemaConfig schema) {
    // 第一层子查询
    SQLExpr where = mysqlSelectQuery.getWhere();
    SQLTableSource from = mysqlSelectQuery.getFrom();
    if (where instanceof SQLBinaryOpExpr && from instanceof SQLSubqueryTableSource) {
        SQLBinaryOpExpr one = (SQLBinaryOpExpr) where;
        SQLExpr left = one.getLeft();
        SQLBinaryOperator operator = one.getOperator();
        // 解析只有一层rownum限制大小
        if (one.getRight() instanceof SQLIntegerExpr && "rownum".equalsIgnoreCase(left.toString()) && (operator == SQLBinaryOperator.LessThanOrEqual || operator == SQLBinaryOperator.LessThan)) {
            SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
            int firstrownum = right.getNumber().intValue();
            if (operator == SQLBinaryOperator.LessThan && firstrownum != 0) {
                firstrownum = firstrownum - 1;
            }
            SQLSelectQuery subSelect = ((SQLSubqueryTableSource) from).getSelect().getQuery();
            if (subSelect instanceof OracleSelectQueryBlock) {
                rrs.setLimitStart(0);
                rrs.setLimitSize(firstrownum);
                // 为了继续解出order by 等
                mysqlSelectQuery = (OracleSelectQueryBlock) subSelect;
                parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
                isNeedParseOrderAgg = false;
            }
        } else // 解析oracle三层嵌套分页
        if (one.getRight() instanceof SQLIntegerExpr && !"rownum".equalsIgnoreCase(left.toString()) && (operator == SQLBinaryOperator.GreaterThan || operator == SQLBinaryOperator.GreaterThanOrEqual)) {
            parseThreeLevelPageSql(stmt, rrs, schema, (SQLSubqueryTableSource) from, one, operator);
        } else // 解析oracle rownumber over分页
        {
            SQLSelectQuery subSelect = ((SQLSubqueryTableSource) from).getSelect().getQuery();
            SQLOrderBy orderBy = null;
            if (subSelect instanceof OracleSelectQueryBlock) {
                boolean hasRowNumber = false;
                OracleSelectQueryBlock subSelectOracle = (OracleSelectQueryBlock) subSelect;
                List<SQLSelectItem> sqlSelectItems = subSelectOracle.getSelectList();
                for (SQLSelectItem sqlSelectItem : sqlSelectItems) {
                    SQLExpr sqlExpr = sqlSelectItem.getExpr();
                    if (sqlExpr instanceof SQLAggregateExpr) {
                        SQLAggregateExpr agg = (SQLAggregateExpr) sqlExpr;
                        if ("row_number".equalsIgnoreCase(agg.getMethodName()) && agg.getOver() != null) {
                            hasRowNumber = true;
                            orderBy = agg.getOver().getOrderBy();
                        }
                    }
                }
                if (hasRowNumber) {
                    if ((operator == SQLBinaryOperator.LessThan || operator == SQLBinaryOperator.LessThanOrEqual) && one.getRight() instanceof SQLIntegerExpr) {
                        SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
                        int firstrownum = right.getNumber().intValue();
                        if (operator == SQLBinaryOperator.LessThan && firstrownum != 0) {
                            firstrownum = firstrownum - 1;
                        }
                        if (subSelect instanceof OracleSelectQueryBlock) {
                            rrs.setLimitStart(0);
                            rrs.setLimitSize(firstrownum);
                            mysqlSelectQuery = (OracleSelectQueryBlock) subSelect;
                            if (orderBy != null) {
                                OracleSelect oracleSelect = (OracleSelect) subSelect.getParent();
                                oracleSelect.setOrderBy(orderBy);
                            }
                            parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
                            isNeedParseOrderAgg = false;
                        }
                    } else if (operator == SQLBinaryOperator.BooleanAnd && left instanceof SQLBinaryOpExpr && one.getRight() instanceof SQLBinaryOpExpr) {
                        SQLBinaryOpExpr leftE = (SQLBinaryOpExpr) left;
                        SQLBinaryOpExpr rightE = (SQLBinaryOpExpr) one.getRight();
                        SQLBinaryOpExpr small = null;
                        SQLBinaryOpExpr larger = null;
                        int firstrownum = 0;
                        int lastrownum = 0;
                        if (leftE.getRight() instanceof SQLIntegerExpr && (leftE.getOperator() == SQLBinaryOperator.GreaterThan || leftE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual)) {
                            small = leftE;
                            firstrownum = ((SQLIntegerExpr) leftE.getRight()).getNumber().intValue();
                            if (leftE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                                firstrownum = firstrownum - 1;
                            }
                        } else if (leftE.getRight() instanceof SQLIntegerExpr && (leftE.getOperator() == SQLBinaryOperator.LessThan || leftE.getOperator() == SQLBinaryOperator.LessThanOrEqual)) {
                            larger = leftE;
                            lastrownum = ((SQLIntegerExpr) leftE.getRight()).getNumber().intValue();
                            if (leftE.getOperator() == SQLBinaryOperator.LessThan && lastrownum != 0) {
                                lastrownum = lastrownum - 1;
                            }
                        }
                        if (rightE.getRight() instanceof SQLIntegerExpr && (rightE.getOperator() == SQLBinaryOperator.GreaterThan || rightE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual)) {
                            small = rightE;
                            firstrownum = ((SQLIntegerExpr) rightE.getRight()).getNumber().intValue();
                            if (rightE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                                firstrownum = firstrownum - 1;
                            }
                        } else if (rightE.getRight() instanceof SQLIntegerExpr && (rightE.getOperator() == SQLBinaryOperator.LessThan || rightE.getOperator() == SQLBinaryOperator.LessThanOrEqual)) {
                            larger = rightE;
                            lastrownum = ((SQLIntegerExpr) rightE.getRight()).getNumber().intValue();
                            if (rightE.getOperator() == SQLBinaryOperator.LessThan && lastrownum != 0) {
                                lastrownum = lastrownum - 1;
                            }
                        }
                        if (small != null && larger != null) {
                            setLimitIFChange(stmt, rrs, schema, small, firstrownum, lastrownum);
                            if (orderBy != null) {
                                OracleSelect oracleSelect = (OracleSelect) subSelect.getParent();
                                oracleSelect.setOrderBy(orderBy);
                            }
                            parseOrderAggGroupOracle(stmt, rrs, (OracleSelectQueryBlock) subSelect, schema);
                            isNeedParseOrderAgg = false;
                        }
                    }
                } else {
                    parseNativeSql(stmt, rrs, mysqlSelectQuery, schema);
                }
            }
        }
    } else {
        parseNativeSql(stmt, rrs, mysqlSelectQuery, schema);
    }
    if (isNeedParseOrderAgg) {
        parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
    }
}
Also used : SQLSubqueryTableSource(com.alibaba.druid.sql.ast.statement.SQLSubqueryTableSource) SQLOrderBy(com.alibaba.druid.sql.ast.SQLOrderBy) SQLBinaryOperator(com.alibaba.druid.sql.ast.expr.SQLBinaryOperator) SQLSelectQuery(com.alibaba.druid.sql.ast.statement.SQLSelectQuery) SQLExpr(com.alibaba.druid.sql.ast.SQLExpr) SQLTableSource(com.alibaba.druid.sql.ast.statement.SQLTableSource) SQLSelectItem(com.alibaba.druid.sql.ast.statement.SQLSelectItem) OracleSelectQueryBlock(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock) OracleSelect(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelect) SQLIntegerExpr(com.alibaba.druid.sql.ast.expr.SQLIntegerExpr) SQLBinaryOpExpr(com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr) List(java.util.List) SQLAggregateExpr(com.alibaba.druid.sql.ast.expr.SQLAggregateExpr)

Example 12 with OracleSelectQueryBlock

use of com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock in project Mycat_plus by coderczp.

the class DruidSelectParser method parseAggGroupCommon.

protected Map<String, String> parseAggGroupCommon(SchemaConfig schema, SQLStatement stmt, RouteResultset rrs, SQLSelectQueryBlock mysqlSelectQuery) {
    Map<String, String> aliaColumns = new HashMap<String, String>();
    Map<String, Integer> aggrColumns = new HashMap<String, Integer>();
    // Added by winbill, 20160314, for having clause, Begin ==>
    List<String> havingColsName = new ArrayList<String>();
    // Added by winbill, 20160314, for having clause, End  <==
    List<SQLSelectItem> selectList = mysqlSelectQuery.getSelectList();
    boolean isNeedChangeSql = false;
    int size = selectList.size();
    boolean isDistinct = mysqlSelectQuery.getDistionOption() == 2;
    for (int i = 0; i < size; i++) {
        SQLSelectItem item = selectList.get(i);
        if (item.getExpr() instanceof SQLAggregateExpr) {
            SQLAggregateExpr expr = (SQLAggregateExpr) item.getExpr();
            String method = expr.getMethodName();
            boolean isHasArgument = !expr.getArguments().isEmpty();
            if (isHasArgument) {
                // Added by winbill, 20160314, for having clause
                String aggrColName = method + "(" + expr.getArguments().get(0) + ")";
                // Added by winbill, 20160314, for having clause
                havingColsName.add(aggrColName);
            }
            // 只处理有别名的情况，无别名添加别名，否则某些数据库会得不到正确结果处理
            int mergeType = MergeCol.getMergeType(method);
            if (MergeCol.MERGE_AVG == mergeType && isRoutMultiNode(schema, rrs)) {
                // 跨分片avg需要特殊处理，直接avg结果是不对的
                String colName = item.getAlias() != null ? item.getAlias() : method + i;
                SQLSelectItem sum = new SQLSelectItem();
                String sumColName = colName + "SUM";
                sum.setAlias(sumColName);
                SQLAggregateExpr sumExp = new SQLAggregateExpr("SUM");
                ObjectUtil.copyProperties(expr, sumExp);
                sumExp.getArguments().addAll(expr.getArguments());
                sumExp.setMethodName("SUM");
                sum.setExpr(sumExp);
                selectList.set(i, sum);
                aggrColumns.put(sumColName, MergeCol.MERGE_SUM);
                // Added by winbill, 20160314, for having clause
                havingColsName.add(sumColName);
                // Added by winbill, 20160314, two aliases for AVG
                havingColsName.add(item.getAlias() != null ? item.getAlias() : "");
                SQLSelectItem count = new SQLSelectItem();
                String countColName = colName + "COUNT";
                count.setAlias(countColName);
                SQLAggregateExpr countExp = new SQLAggregateExpr("COUNT");
                ObjectUtil.copyProperties(expr, countExp);
                countExp.getArguments().addAll(expr.getArguments());
                countExp.setMethodName("COUNT");
                count.setExpr(countExp);
                selectList.add(count);
                aggrColumns.put(countColName, MergeCol.MERGE_COUNT);
                isNeedChangeSql = true;
                aggrColumns.put(colName, mergeType);
                rrs.setHasAggrColumn(true);
            } else if (MergeCol.MERGE_UNSUPPORT != mergeType) {
                String aggColName = null;
                StringBuilder sb = new StringBuilder();
                if (mysqlSelectQuery instanceof MySqlSelectQueryBlock) {
                    expr.accept(new MySqlOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof OracleSelectQueryBlock) {
                    expr.accept(new OracleOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof PGSelectQueryBlock) {
                    expr.accept(new PGOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof SQLServerSelectQueryBlock) {
                    expr.accept(new SQLASTOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof DB2SelectQueryBlock) {
                    expr.accept(new DB2OutputVisitor(sb));
                }
                aggColName = sb.toString();
                if (item.getAlias() != null && item.getAlias().length() > 0) {
                    aggrColumns.put(item.getAlias(), mergeType);
                    aliaColumns.put(aggColName, item.getAlias());
                } else {
                    // 如果不加，jdbc方式时取不到正确结果   ;修改添加别名
                    item.setAlias(method + i);
                    aggrColumns.put(method + i, mergeType);
                    aliaColumns.put(aggColName, method + i);
                    isNeedChangeSql = true;
                }
                rrs.setHasAggrColumn(true);
                // Added by winbill, 20160314, for having clause
                havingColsName.add(item.getAlias());
                // Added by winbill, 20160314, one alias for non-AVG
                havingColsName.add("");
            }
        } else {
            if (!(item.getExpr() instanceof SQLAllColumnExpr)) {
                String alia = item.getAlias();
                String field = getFieldName(item);
                if (alia == null) {
                    alia = field;
                }
                aliaColumns.put(field, alia);
            }
        }
    }
    if (aggrColumns.size() > 0) {
        rrs.setMergeCols(aggrColumns);
    }
    // 通过优化转换成group by来实现
    if (isDistinct) {
        mysqlSelectQuery.setDistionOption(0);
        SQLSelectGroupByClause groupBy = new SQLSelectGroupByClause();
        for (String fieldName : aliaColumns.keySet()) {
            groupBy.addItem(new SQLIdentifierExpr(fieldName));
        }
        mysqlSelectQuery.setGroupBy(groupBy);
        isNeedChangeSql = true;
    }
    // setGroupByCols
    if (mysqlSelectQuery.getGroupBy() != null) {
        List<SQLExpr> groupByItems = mysqlSelectQuery.getGroupBy().getItems();
        String[] groupByCols = buildGroupByCols(groupByItems, aliaColumns);
        rrs.setGroupByCols(groupByCols);
        rrs.setHavings(buildGroupByHaving(mysqlSelectQuery.getGroupBy().getHaving(), aliaColumns));
        rrs.setHasAggrColumn(true);
        // Added by winbill, 20160314, for having clause
        rrs.setHavingColsName(havingColsName.toArray());
    }
    if (isNeedChangeSql) {
        String sql = stmt.toString();
        rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), sql, 0, -1, false);
        getCtx().setSql(sql);
    }
    return aliaColumns;
}
Also used : SQLSelectGroupByClause(com.alibaba.druid.sql.ast.statement.SQLSelectGroupByClause) DB2OutputVisitor(com.alibaba.druid.sql.dialect.db2.visitor.DB2OutputVisitor) HashMap(java.util.HashMap) LinkedHashMap(java.util.LinkedHashMap) ArrayList(java.util.ArrayList) PGSelectQueryBlock(com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGSelectQueryBlock) SQLSelectItem(com.alibaba.druid.sql.ast.statement.SQLSelectItem) SQLAllColumnExpr(com.alibaba.druid.sql.ast.expr.SQLAllColumnExpr) SQLASTOutputVisitor(com.alibaba.druid.sql.visitor.SQLASTOutputVisitor) PGOutputVisitor(com.alibaba.druid.sql.dialect.postgresql.visitor.PGOutputVisitor) SQLIdentifierExpr(com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr) MySqlSelectQueryBlock(com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock) SQLExpr(com.alibaba.druid.sql.ast.SQLExpr) OracleOutputVisitor(com.alibaba.druid.sql.dialect.oracle.visitor.OracleOutputVisitor) OracleSelectQueryBlock(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock) SQLServerSelectQueryBlock(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock) MySqlOutputVisitor(com.alibaba.druid.sql.dialect.mysql.visitor.MySqlOutputVisitor) DB2SelectQueryBlock(com.alibaba.druid.sql.dialect.db2.ast.stmt.DB2SelectQueryBlock) SQLAggregateExpr(com.alibaba.druid.sql.ast.expr.SQLAggregateExpr)

Example 13 with OracleSelectQueryBlock

use of com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectDb2Parser method parseNativePageSql.

protected void parseNativePageSql(SQLStatement stmt, RouteResultset rrs, OracleSelectQueryBlock mysqlSelectQuery, SchemaConfig schema) {
    // 第一层子查询
    SQLExpr where = mysqlSelectQuery.getWhere();
    SQLTableSource from = mysqlSelectQuery.getFrom();
    if (where instanceof SQLBinaryOpExpr && from instanceof SQLSubqueryTableSource) {
        SQLBinaryOpExpr one = (SQLBinaryOpExpr) where;
        SQLExpr left = one.getLeft();
        SQLBinaryOperator operator = one.getOperator();
        SQLSelectQuery subSelect = ((SQLSubqueryTableSource) from).getSelect().getQuery();
        SQLOrderBy orderBy = null;
        if (subSelect instanceof OracleSelectQueryBlock) {
            boolean hasRowNumber = false;
            OracleSelectQueryBlock subSelectOracle = (OracleSelectQueryBlock) subSelect;
            List<SQLSelectItem> sqlSelectItems = subSelectOracle.getSelectList();
            for (SQLSelectItem sqlSelectItem : sqlSelectItems) {
                SQLExpr sqlExpr = sqlSelectItem.getExpr();
                if (sqlExpr instanceof SQLAggregateExpr) {
                    SQLAggregateExpr agg = (SQLAggregateExpr) sqlExpr;
                    if ("row_number".equalsIgnoreCase(agg.getMethodName()) && agg.getOver() != null) {
                        hasRowNumber = true;
                        orderBy = agg.getOver().getOrderBy();
                    }
                }
            }
            if (hasRowNumber) {
                if ((operator == SQLBinaryOperator.LessThan || operator == SQLBinaryOperator.LessThanOrEqual) && one.getRight() instanceof SQLIntegerExpr) {
                    SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
                    int firstrownum = right.getNumber().intValue();
                    if (operator == SQLBinaryOperator.LessThan && firstrownum != 0) {
                        firstrownum = firstrownum - 1;
                    }
                    if (subSelect instanceof OracleSelectQueryBlock) {
                        rrs.setLimitStart(0);
                        rrs.setLimitSize(firstrownum);
                        // 为了继续解出order by 等
                        mysqlSelectQuery = (OracleSelectQueryBlock) subSelect;
                        if (orderBy != null) {
                            OracleSelect oracleSelect = (OracleSelect) subSelect.getParent();
                            oracleSelect.setOrderBy(orderBy);
                        }
                        parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
                        isNeedParseOrderAgg = false;
                    }
                } else if (operator == SQLBinaryOperator.BooleanAnd && left instanceof SQLBinaryOpExpr && one.getRight() instanceof SQLBinaryOpExpr) {
                    SQLBinaryOpExpr leftE = (SQLBinaryOpExpr) left;
                    SQLBinaryOpExpr rightE = (SQLBinaryOpExpr) one.getRight();
                    SQLBinaryOpExpr small = null;
                    SQLBinaryOpExpr larger = null;
                    int firstrownum = 0;
                    int lastrownum = 0;
                    if (leftE.getRight() instanceof SQLIntegerExpr && (leftE.getOperator() == SQLBinaryOperator.GreaterThan || leftE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual)) {
                        small = leftE;
                        firstrownum = ((SQLIntegerExpr) leftE.getRight()).getNumber().intValue();
                        if (leftE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                            firstrownum = firstrownum - 1;
                        }
                    } else if (leftE.getRight() instanceof SQLIntegerExpr && (leftE.getOperator() == SQLBinaryOperator.LessThan || leftE.getOperator() == SQLBinaryOperator.LessThanOrEqual)) {
                        larger = leftE;
                        lastrownum = ((SQLIntegerExpr) leftE.getRight()).getNumber().intValue();
                        if (leftE.getOperator() == SQLBinaryOperator.LessThan && lastrownum != 0) {
                            lastrownum = lastrownum - 1;
                        }
                    }
                    if (rightE.getRight() instanceof SQLIntegerExpr && (rightE.getOperator() == SQLBinaryOperator.GreaterThan || rightE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual)) {
                        small = rightE;
                        firstrownum = ((SQLIntegerExpr) rightE.getRight()).getNumber().intValue();
                        if (rightE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                            firstrownum = firstrownum - 1;
                        }
                    } else if (rightE.getRight() instanceof SQLIntegerExpr && (rightE.getOperator() == SQLBinaryOperator.LessThan || rightE.getOperator() == SQLBinaryOperator.LessThanOrEqual)) {
                        larger = rightE;
                        lastrownum = ((SQLIntegerExpr) rightE.getRight()).getNumber().intValue();
                        if (rightE.getOperator() == SQLBinaryOperator.LessThan && lastrownum != 0) {
                            lastrownum = lastrownum - 1;
                        }
                    }
                    if (small != null && larger != null) {
                        setLimitIFChange(stmt, rrs, schema, small, firstrownum, lastrownum);
                        if (orderBy != null) {
                            OracleSelect oracleSelect = (OracleSelect) subSelect.getParent();
                            oracleSelect.setOrderBy(orderBy);
                        }
                        parseOrderAggGroupOracle(stmt, rrs, (OracleSelectQueryBlock) subSelect, schema);
                        isNeedParseOrderAgg = false;
                    }
                }
            } else {
                parseNativeSql(stmt, rrs, mysqlSelectQuery, schema);
            }
        }
    } else {
        parseNativeSql(stmt, rrs, mysqlSelectQuery, schema);
    }
    if (isNeedParseOrderAgg) {
        parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
    }
}
Also used : SQLSubqueryTableSource(com.alibaba.druid.sql.ast.statement.SQLSubqueryTableSource) SQLOrderBy(com.alibaba.druid.sql.ast.SQLOrderBy) SQLBinaryOperator(com.alibaba.druid.sql.ast.expr.SQLBinaryOperator) SQLSelectQuery(com.alibaba.druid.sql.ast.statement.SQLSelectQuery) SQLExpr(com.alibaba.druid.sql.ast.SQLExpr) SQLTableSource(com.alibaba.druid.sql.ast.statement.SQLTableSource) SQLSelectItem(com.alibaba.druid.sql.ast.statement.SQLSelectItem) OracleSelectQueryBlock(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock) OracleSelect(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelect) SQLIntegerExpr(com.alibaba.druid.sql.ast.expr.SQLIntegerExpr) SQLBinaryOpExpr(com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr) SQLAggregateExpr(com.alibaba.druid.sql.ast.expr.SQLAggregateExpr)

Example 14 with OracleSelectQueryBlock

use of com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectOracleParser method parseNativePageSql.

protected void parseNativePageSql(SQLStatement stmt, RouteResultset rrs, OracleSelectQueryBlock mysqlSelectQuery, SchemaConfig schema) {
    // 第一层子查询
    SQLExpr where = mysqlSelectQuery.getWhere();
    SQLTableSource from = mysqlSelectQuery.getFrom();
    if (where instanceof SQLBinaryOpExpr && from instanceof SQLSubqueryTableSource) {
        SQLBinaryOpExpr one = (SQLBinaryOpExpr) where;
        SQLExpr left = one.getLeft();
        SQLBinaryOperator operator = one.getOperator();
        // 解析只有一层rownum限制大小
        if (one.getRight() instanceof SQLIntegerExpr && "rownum".equalsIgnoreCase(left.toString()) && (operator == SQLBinaryOperator.LessThanOrEqual || operator == SQLBinaryOperator.LessThan)) {
            SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
            int firstrownum = right.getNumber().intValue();
            if (operator == SQLBinaryOperator.LessThan && firstrownum != 0) {
                firstrownum = firstrownum - 1;
            }
            SQLSelectQuery subSelect = ((SQLSubqueryTableSource) from).getSelect().getQuery();
            if (subSelect instanceof OracleSelectQueryBlock) {
                rrs.setLimitStart(0);
                rrs.setLimitSize(firstrownum);
                // 为了继续解出order by 等
                mysqlSelectQuery = (OracleSelectQueryBlock) subSelect;
                parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
                isNeedParseOrderAgg = false;
            }
        } else // 解析oracle三层嵌套分页
        if (one.getRight() instanceof SQLIntegerExpr && !"rownum".equalsIgnoreCase(left.toString()) && (operator == SQLBinaryOperator.GreaterThan || operator == SQLBinaryOperator.GreaterThanOrEqual)) {
            parseThreeLevelPageSql(stmt, rrs, schema, (SQLSubqueryTableSource) from, one, operator);
        } else // 解析oracle rownumber over分页
        {
            SQLSelectQuery subSelect = ((SQLSubqueryTableSource) from).getSelect().getQuery();
            SQLOrderBy orderBy = null;
            if (subSelect instanceof OracleSelectQueryBlock) {
                boolean hasRowNumber = false;
                OracleSelectQueryBlock subSelectOracle = (OracleSelectQueryBlock) subSelect;
                List<SQLSelectItem> sqlSelectItems = subSelectOracle.getSelectList();
                for (SQLSelectItem sqlSelectItem : sqlSelectItems) {
                    SQLExpr sqlExpr = sqlSelectItem.getExpr();
                    if (sqlExpr instanceof SQLAggregateExpr) {
                        SQLAggregateExpr agg = (SQLAggregateExpr) sqlExpr;
                        if ("row_number".equalsIgnoreCase(agg.getMethodName()) && agg.getOver() != null) {
                            hasRowNumber = true;
                            orderBy = agg.getOver().getOrderBy();
                        }
                    }
                }
                if (hasRowNumber) {
                    if ((operator == SQLBinaryOperator.LessThan || operator == SQLBinaryOperator.LessThanOrEqual) && one.getRight() instanceof SQLIntegerExpr) {
                        SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
                        int firstrownum = right.getNumber().intValue();
                        if (operator == SQLBinaryOperator.LessThan && firstrownum != 0) {
                            firstrownum = firstrownum - 1;
                        }
                        if (subSelect instanceof OracleSelectQueryBlock) {
                            rrs.setLimitStart(0);
                            rrs.setLimitSize(firstrownum);
                            mysqlSelectQuery = (OracleSelectQueryBlock) subSelect;
                            if (orderBy != null) {
                                OracleSelect oracleSelect = (OracleSelect) subSelect.getParent();
                                oracleSelect.setOrderBy(orderBy);
                            }
                            parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
                            isNeedParseOrderAgg = false;
                        }
                    } else if (operator == SQLBinaryOperator.BooleanAnd && left instanceof SQLBinaryOpExpr && one.getRight() instanceof SQLBinaryOpExpr) {
                        SQLBinaryOpExpr leftE = (SQLBinaryOpExpr) left;
                        SQLBinaryOpExpr rightE = (SQLBinaryOpExpr) one.getRight();
                        SQLBinaryOpExpr small = null;
                        SQLBinaryOpExpr larger = null;
                        int firstrownum = 0;
                        int lastrownum = 0;
                        if (leftE.getRight() instanceof SQLIntegerExpr && (leftE.getOperator() == SQLBinaryOperator.GreaterThan || leftE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual)) {
                            small = leftE;
                            firstrownum = ((SQLIntegerExpr) leftE.getRight()).getNumber().intValue();
                            if (leftE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                                firstrownum = firstrownum - 1;
                            }
                        } else if (leftE.getRight() instanceof SQLIntegerExpr && (leftE.getOperator() == SQLBinaryOperator.LessThan || leftE.getOperator() == SQLBinaryOperator.LessThanOrEqual)) {
                            larger = leftE;
                            lastrownum = ((SQLIntegerExpr) leftE.getRight()).getNumber().intValue();
                            if (leftE.getOperator() == SQLBinaryOperator.LessThan && lastrownum != 0) {
                                lastrownum = lastrownum - 1;
                            }
                        }
                        if (rightE.getRight() instanceof SQLIntegerExpr && (rightE.getOperator() == SQLBinaryOperator.GreaterThan || rightE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual)) {
                            small = rightE;
                            firstrownum = ((SQLIntegerExpr) rightE.getRight()).getNumber().intValue();
                            if (rightE.getOperator() == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                                firstrownum = firstrownum - 1;
                            }
                        } else if (rightE.getRight() instanceof SQLIntegerExpr && (rightE.getOperator() == SQLBinaryOperator.LessThan || rightE.getOperator() == SQLBinaryOperator.LessThanOrEqual)) {
                            larger = rightE;
                            lastrownum = ((SQLIntegerExpr) rightE.getRight()).getNumber().intValue();
                            if (rightE.getOperator() == SQLBinaryOperator.LessThan && lastrownum != 0) {
                                lastrownum = lastrownum - 1;
                            }
                        }
                        if (small != null && larger != null) {
                            setLimitIFChange(stmt, rrs, schema, small, firstrownum, lastrownum);
                            if (orderBy != null) {
                                OracleSelect oracleSelect = (OracleSelect) subSelect.getParent();
                                oracleSelect.setOrderBy(orderBy);
                            }
                            parseOrderAggGroupOracle(stmt, rrs, (OracleSelectQueryBlock) subSelect, schema);
                            isNeedParseOrderAgg = false;
                        }
                    }
                } else {
                    parseNativeSql(stmt, rrs, mysqlSelectQuery, schema);
                }
            }
        }
    } else {
        parseNativeSql(stmt, rrs, mysqlSelectQuery, schema);
    }
    if (isNeedParseOrderAgg) {
        parseOrderAggGroupOracle(stmt, rrs, mysqlSelectQuery, schema);
    }
}
Also used : SQLSubqueryTableSource(com.alibaba.druid.sql.ast.statement.SQLSubqueryTableSource) SQLOrderBy(com.alibaba.druid.sql.ast.SQLOrderBy) SQLBinaryOperator(com.alibaba.druid.sql.ast.expr.SQLBinaryOperator) SQLSelectQuery(com.alibaba.druid.sql.ast.statement.SQLSelectQuery) SQLExpr(com.alibaba.druid.sql.ast.SQLExpr) SQLTableSource(com.alibaba.druid.sql.ast.statement.SQLTableSource) SQLSelectItem(com.alibaba.druid.sql.ast.statement.SQLSelectItem) OracleSelectQueryBlock(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock) OracleSelect(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelect) SQLIntegerExpr(com.alibaba.druid.sql.ast.expr.SQLIntegerExpr) SQLBinaryOpExpr(com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr) List(java.util.List) SQLAggregateExpr(com.alibaba.druid.sql.ast.expr.SQLAggregateExpr)

Example 15 with OracleSelectQueryBlock

use of com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectOracleParser method statementParse.

@Override
public void statementParse(SchemaConfig schema, RouteResultset rrs, SQLStatement stmt) {
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelectQuery sqlSelectQuery = selectStmt.getSelect().getQuery();
    // 从mysql解析过来
    if (sqlSelectQuery instanceof MySqlSelectQueryBlock) {
        MySqlSelectQueryBlock mysqlSelectQuery = (MySqlSelectQueryBlock) selectStmt.getSelect().getQuery();
        Limit limit = mysqlSelectQuery.getLimit();
        if (limit == null) {
            // 使用oracle的解析，否则会有部分oracle语法识别错误
            OracleStatementParser oracleParser = new OracleStatementParser(getCtx().getSql());
            SQLSelectStatement oracleStmt = (SQLSelectStatement) oracleParser.parseStatement();
            selectStmt = oracleStmt;
            SQLSelectQuery oracleSqlSelectQuery = oracleStmt.getSelect().getQuery();
            if (oracleSqlSelectQuery instanceof OracleSelectQueryBlock) {
                parseNativePageSql(oracleStmt, rrs, (OracleSelectQueryBlock) oracleSqlSelectQuery, schema);
            }
        }
        if (isNeedParseOrderAgg) {
            parseOrderAggGroupMysql(schema, selectStmt, rrs, mysqlSelectQuery);
            // 更改canRunInReadDB属性
            if ((mysqlSelectQuery.isForUpdate() || mysqlSelectQuery.isLockInShareMode()) && rrs.isAutocommit() == false) {
                rrs.setCanRunInReadDB(false);
            }
        }
    }
}
Also used : OracleSelectQueryBlock(com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock) SQLSelectQuery(com.alibaba.druid.sql.ast.statement.SQLSelectQuery) SQLSelectStatement(com.alibaba.druid.sql.ast.statement.SQLSelectStatement) Limit(com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock.Limit) MySqlSelectQueryBlock(com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock) OracleStatementParser(com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser)

Aggregations

OracleSelectQueryBlock (com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock)17 SQLExpr (com.alibaba.druid.sql.ast.SQLExpr)9 SQLSelectItem (com.alibaba.druid.sql.ast.statement.SQLSelectItem)9 SQLSelectQuery (com.alibaba.druid.sql.ast.statement.SQLSelectQuery)9 SQLBinaryOpExpr (com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr)7 SQLIntegerExpr (com.alibaba.druid.sql.ast.expr.SQLIntegerExpr)7 SQLSubqueryTableSource (com.alibaba.druid.sql.ast.statement.SQLSubqueryTableSource)7 SQLAggregateExpr (com.alibaba.druid.sql.ast.expr.SQLAggregateExpr)6 SQLOrderBy (com.alibaba.druid.sql.ast.SQLOrderBy)5 MySqlSelectQueryBlock (com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock)5 SQLBinaryOperator (com.alibaba.druid.sql.ast.expr.SQLBinaryOperator)4 SQLSelectQueryBlock (com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock)4 SQLTableSource (com.alibaba.druid.sql.ast.statement.SQLTableSource)4 OracleSelect (com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelect)4 SQLAllColumnExpr (com.alibaba.druid.sql.ast.expr.SQLAllColumnExpr)3 SQLIdentifierExpr (com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr)3 DB2SelectQueryBlock (com.alibaba.druid.sql.dialect.db2.ast.stmt.DB2SelectQueryBlock)3 PGSelectQueryBlock (com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGSelectQueryBlock)3 SQLServerSelectQueryBlock (com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock)3 ArrayList (java.util.ArrayList)3
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