Examples with SQLOrderBy com.alibaba.druid.sql.ast.SQLOrderBy used on opensource projects

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Example 21 with SQLOrderBy

use of com.alibaba.druid.sql.ast.SQLOrderBy in project Mycat_plus by coderczp.

the class DruidSelectSqlServerParser method parseSqlServerPageSql.

private void parseSqlServerPageSql(SQLStatement stmt, RouteResultset rrs, SQLServerSelectQueryBlock sqlserverSelectQuery, SchemaConfig schema) {
    // 第一层子查询
    SQLExpr where = sqlserverSelectQuery.getWhere();
    SQLTableSource from = sqlserverSelectQuery.getFrom();
    if (sqlserverSelectQuery.getTop() != null) {
        SQLServerTop top = sqlserverSelectQuery.getTop();
        SQLExpr sqlExpr = top.getExpr();
        if (sqlExpr instanceof SQLIntegerExpr) {
            int topValue = ((SQLIntegerExpr) sqlExpr).getNumber().intValue();
            rrs.setLimitStart(0);
            rrs.setLimitSize(topValue);
        }
    } else 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 SQLServerSelectQueryBlock) {
            boolean hasRowNumber = false;
            boolean hasSubTop = false;
            int subTop = 0;
            SQLServerSelectQueryBlock subSelectOracle = (SQLServerSelectQueryBlock) 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 (subSelectOracle.getFrom() instanceof SQLSubqueryTableSource) {
                SQLSubqueryTableSource subFrom = (SQLSubqueryTableSource) subSelectOracle.getFrom();
                if (subFrom.getSelect().getQuery() instanceof SQLServerSelectQueryBlock) {
                    SQLServerSelectQueryBlock sqlSelectQuery = (SQLServerSelectQueryBlock) subFrom.getSelect().getQuery();
                    if (sqlSelectQuery.getTop() != null) {
                        SQLExpr sqlExpr = sqlSelectQuery.getTop().getExpr();
                        if (sqlExpr instanceof SQLIntegerExpr) {
                            hasSubTop = true;
                            subTop = ((SQLIntegerExpr) sqlExpr).getNumber().intValue();
                            orderBy = subFrom.getSelect().getOrderBy();
                        }
                    }
                }
            }
            if (hasRowNumber) {
                if (hasSubTop && (operator == SQLBinaryOperator.GreaterThan || operator == SQLBinaryOperator.GreaterThanOrEqual) && one.getRight() instanceof SQLIntegerExpr) {
                    SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
                    int firstrownum = right.getNumber().intValue();
                    if (operator == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                        firstrownum = firstrownum - 1;
                    }
                    int lastrownum = subTop;
                    setLimitIFChange(stmt, rrs, schema, one, firstrownum, lastrownum);
                    if (orderBy != null) {
                        SQLServerSelect oracleSelect = (SQLServerSelect) subSelect.getParent();
                        oracleSelect.setOrderBy(orderBy);
                    }
                    parseOrderAggGroupSqlServer(schema, stmt, rrs, (SQLServerSelectQueryBlock) subSelect);
                    isNeedParseOrderAgg = false;
                } else 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 SQLServerSelectQueryBlock) {
                        rrs.setLimitStart(0);
                        rrs.setLimitSize(firstrownum);
                        // 为了继续解出order by 等
                        sqlserverSelectQuery = (SQLServerSelectQueryBlock) subSelect;
                        if (orderBy != null) {
                            SQLServerSelect oracleSelect = (SQLServerSelect) subSelect.getParent();
                            oracleSelect.setOrderBy(orderBy);
                        }
                        parseOrderAggGroupSqlServer(schema, stmt, rrs, sqlserverSelectQuery);
                        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) {
                            SQLServerSelect oracleSelect = (SQLServerSelect) subSelect.getParent();
                            oracleSelect.setOrderBy(orderBy);
                        }
                        parseOrderAggGroupSqlServer(schema, stmt, rrs, (SQLServerSelectQueryBlock) subSelect);
                        isNeedParseOrderAgg = false;
                    }
                }
            }
        }
    }
}
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) SQLServerSelect(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelect) 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) SQLServerTop(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerTop) SQLServerSelectQueryBlock(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock) 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 22 with SQLOrderBy

use of com.alibaba.druid.sql.ast.SQLOrderBy 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 23 with SQLOrderBy

use of com.alibaba.druid.sql.ast.SQLOrderBy in project Mycat-Server by MyCATApache.

the class DruidSelectSqlServerParser method parseSqlServerPageSql.

private void parseSqlServerPageSql(SQLStatement stmt, RouteResultset rrs, SQLServerSelectQueryBlock sqlserverSelectQuery, SchemaConfig schema) {
    // 第一层子查询
    SQLExpr where = sqlserverSelectQuery.getWhere();
    SQLTableSource from = sqlserverSelectQuery.getFrom();
    if (sqlserverSelectQuery.getTop() != null) {
        SQLServerTop top = sqlserverSelectQuery.getTop();
        SQLExpr sqlExpr = top.getExpr();
        if (sqlExpr instanceof SQLIntegerExpr) {
            int topValue = ((SQLIntegerExpr) sqlExpr).getNumber().intValue();
            rrs.setLimitStart(0);
            rrs.setLimitSize(topValue);
        }
    } else 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 SQLServerSelectQueryBlock) {
            boolean hasRowNumber = false;
            boolean hasSubTop = false;
            int subTop = 0;
            SQLServerSelectQueryBlock subSelectOracle = (SQLServerSelectQueryBlock) 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 (subSelectOracle.getFrom() instanceof SQLSubqueryTableSource) {
                SQLSubqueryTableSource subFrom = (SQLSubqueryTableSource) subSelectOracle.getFrom();
                if (subFrom.getSelect().getQuery() instanceof SQLServerSelectQueryBlock) {
                    SQLServerSelectQueryBlock sqlSelectQuery = (SQLServerSelectQueryBlock) subFrom.getSelect().getQuery();
                    if (sqlSelectQuery.getTop() != null) {
                        SQLExpr sqlExpr = sqlSelectQuery.getTop().getExpr();
                        if (sqlExpr instanceof SQLIntegerExpr) {
                            hasSubTop = true;
                            subTop = ((SQLIntegerExpr) sqlExpr).getNumber().intValue();
                            orderBy = subFrom.getSelect().getOrderBy();
                        }
                    }
                }
            }
            if (hasRowNumber) {
                if (hasSubTop && (operator == SQLBinaryOperator.GreaterThan || operator == SQLBinaryOperator.GreaterThanOrEqual) && one.getRight() instanceof SQLIntegerExpr) {
                    SQLIntegerExpr right = (SQLIntegerExpr) one.getRight();
                    int firstrownum = right.getNumber().intValue();
                    if (operator == SQLBinaryOperator.GreaterThanOrEqual && firstrownum != 0) {
                        firstrownum = firstrownum - 1;
                    }
                    int lastrownum = subTop;
                    setLimitIFChange(stmt, rrs, schema, one, firstrownum, lastrownum);
                    if (orderBy != null) {
                        SQLServerSelect oracleSelect = (SQLServerSelect) subSelect.getParent();
                        oracleSelect.setOrderBy(orderBy);
                    }
                    parseOrderAggGroupSqlServer(schema, stmt, rrs, (SQLServerSelectQueryBlock) subSelect);
                    isNeedParseOrderAgg = false;
                } else 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 SQLServerSelectQueryBlock) {
                        rrs.setLimitStart(0);
                        rrs.setLimitSize(firstrownum);
                        // 为了继续解出order by 等
                        sqlserverSelectQuery = (SQLServerSelectQueryBlock) subSelect;
                        if (orderBy != null) {
                            SQLServerSelect oracleSelect = (SQLServerSelect) subSelect.getParent();
                            oracleSelect.setOrderBy(orderBy);
                        }
                        parseOrderAggGroupSqlServer(schema, stmt, rrs, sqlserverSelectQuery);
                        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) {
                            SQLServerSelect oracleSelect = (SQLServerSelect) subSelect.getParent();
                            oracleSelect.setOrderBy(orderBy);
                        }
                        parseOrderAggGroupSqlServer(schema, stmt, rrs, (SQLServerSelectQueryBlock) subSelect);
                        isNeedParseOrderAgg = false;
                    }
                }
            }
        }
    }
}
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) SQLServerSelect(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelect) 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) SQLServerTop(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerTop) SQLServerSelectQueryBlock(com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock) 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 24 with SQLOrderBy

use of com.alibaba.druid.sql.ast.SQLOrderBy 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 25 with SQLOrderBy

use of com.alibaba.druid.sql.ast.SQLOrderBy in project druid by alibaba.

the class ClickhouseCreateTableParser method parseCreateTableRest.

protected void parseCreateTableRest(SQLCreateTableStatement stmt) {
    ClickhouseCreateTableStatement ckStmt = (ClickhouseCreateTableStatement) stmt;
    if (lexer.identifierEquals(FnvHash.Constants.ENGINE)) {
        lexer.nextToken();
        if (lexer.token() == Token.EQ) {
            lexer.nextToken();
        }
        stmt.setEngine(this.exprParser.expr());
    }
    if (lexer.identifierEquals("PARTITION")) {
        lexer.nextToken();
        accept(Token.BY);
        SQLExpr expr = this.exprParser.expr();
        ckStmt.setPartitionBy(expr);
    }
    if (lexer.token() == Token.ORDER) {
        SQLOrderBy orderBy = this.exprParser.parseOrderBy();
        ckStmt.setOrderBy(orderBy);
    }
    if (lexer.identifierEquals("SAMPLE")) {
        lexer.nextToken();
        accept(Token.BY);
        SQLExpr expr = this.exprParser.expr();
        ckStmt.setSampleBy(expr);
    }
    if (lexer.identifierEquals("SETTINGS")) {
        lexer.nextToken();
        for (; ; ) {
            SQLAssignItem item = this.exprParser.parseAssignItem();
            item.setParent(ckStmt);
            ckStmt.getSettings().add(item);
            if (lexer.token() == Token.COMMA) {
                lexer.nextToken();
                continue;
            }
            break;
        }
    }
}
Also used : SQLOrderBy(com.alibaba.druid.sql.ast.SQLOrderBy) SQLAssignItem(com.alibaba.druid.sql.ast.statement.SQLAssignItem) ClickhouseCreateTableStatement(com.alibaba.druid.sql.dialect.clickhouse.ast.ClickhouseCreateTableStatement) SQLExpr(com.alibaba.druid.sql.ast.SQLExpr)

Aggregations

SQLOrderBy (com.alibaba.druid.sql.ast.SQLOrderBy)28 SQLExpr (com.alibaba.druid.sql.ast.SQLExpr)17 SQLAggregateExpr (com.alibaba.druid.sql.ast.expr.SQLAggregateExpr)11 SQLSelectItem (com.alibaba.druid.sql.ast.statement.SQLSelectItem)10 SQLSelectQuery (com.alibaba.druid.sql.ast.statement.SQLSelectQuery)10 SQLBinaryOpExpr (com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr)8 SQLSubqueryTableSource (com.alibaba.druid.sql.ast.statement.SQLSubqueryTableSource)8 SQLTableSource (com.alibaba.druid.sql.ast.statement.SQLTableSource)8 SQLBinaryOperator (com.alibaba.druid.sql.ast.expr.SQLBinaryOperator)6 SQLIntegerExpr (com.alibaba.druid.sql.ast.expr.SQLIntegerExpr)6 SQLSelectOrderByItem (com.alibaba.druid.sql.ast.statement.SQLSelectOrderByItem)5 DB2SelectQueryBlock (com.alibaba.druid.sql.dialect.db2.ast.stmt.DB2SelectQueryBlock)5 OracleSelectQueryBlock (com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectQueryBlock)5 SQLServerSelectQueryBlock (com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock)5 SQLOver (com.alibaba.druid.sql.ast.SQLOver)4 SQLSelectQueryBlock (com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock)4 MySqlStatementParser (com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser)4 OracleSelect (com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelect)4 ParserException (com.alibaba.druid.sql.parser.ParserException)4 List (java.util.List)4
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