Java Code Examples for com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr#getOperator()
The following examples show how to use
com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr#getOperator() .
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Example 1
Source File: JoinParser.java From Mycat2 with GNU General Public License v3.0 | 6 votes |
private void opSQLExpr(SQLBinaryOpExpr expr,String Operator) { if (expr==null) { return; } SQLExpr exprL=expr.getLeft(); if (!(exprL instanceof SQLBinaryOpExpr)) { String field=exprL.toString(); //获取表达式 左边的值 String value=getExpValue(expr.getRight()).toString(); //获取表达式右边的值 if (expr.getOperator()==SQLBinaryOperator.Equality) { if (checkJoinField(value)) {//设置joinKey //joinLkey=field; //joinRkey=value; tableFilter.setJoinKey(field,value); } else { tableFilter.addWhere(field, value, expr.getOperator().getName(), Operator); } } else { tableFilter.addWhere(field, value, expr.getOperator().getName(), Operator); } } }
Example 2
Source File: MycatSubQueryVisitor.java From Mycat2 with GNU General Public License v3.0 | 6 votes |
@Override public boolean visit(SQLBinaryOpExpr x) { switch (x.getOperator()) { case Equality: case LessThanOrEqualOrGreaterThan: case GreaterThan: case GreaterThanOrEqual: case LessThan: case LessThanOrEqual: case NotLessThan: case LessThanOrGreater: case NotEqual: case NotGreaterThan: break; case BooleanOr: relationOr = true; break; case Like: case NotLike: default: break; } return true; }
Example 3
Source File: MycatSchemaStatVisitor.java From Mycat2 with GNU General Public License v3.0 | 6 votes |
/** * 递归拆分OR * * @param whereUnit * TODO:考虑嵌套or语句,条件中有子查询、 exists等很多种复杂情况是否能兼容 */ private void splitUntilNoOr(WhereUnit whereUnit) { if(whereUnit.isFinishedParse()) { if(whereUnit.getSubWhereUnit().size() > 0) { for(int i = 0; i < whereUnit.getSubWhereUnit().size(); i++) { splitUntilNoOr(whereUnit.getSubWhereUnit().get(i)); } } } else { SQLBinaryOpExpr expr = whereUnit.getCanSplitExpr(); if(expr.getOperator() == SQLBinaryOperator.BooleanOr) { // whereUnit.addSplitedExpr(expr.getRight()); addExprIfNotFalse(whereUnit, expr.getRight()); if(expr.getLeft() instanceof SQLBinaryOpExpr) { whereUnit.setCanSplitExpr((SQLBinaryOpExpr)expr.getLeft()); splitUntilNoOr(whereUnit); } else { addExprIfNotFalse(whereUnit, expr.getLeft()); } } else { addExprIfNotFalse(whereUnit, expr); whereUnit.setFinishedParse(true); } } }
Example 4
Source File: SqlVisitor.java From baymax with Apache License 2.0 | 6 votes |
/** * 二元表达 * @param x * @return */ @Override public boolean visit(SQLBinaryOpExpr x) { x.getLeft().setParent(x); x.getRight().setParent(x); switch (x.getOperator()) { case Equality: // a=1 and a=2 or a=3 handleCondition(x.getLeft(), x.getOperator().name, x.getRight()); // a=b 转化为 b=a // a=1 不用转化 handleCondition(x.getRight(), x.getOperator().name, x.getLeft()); handleRelationship(x.getLeft(), x.getOperator().name, x.getRight()); break; case BooleanOr: this.hasOrCondition = true; break; default: break; } return true; }
Example 5
Source File: DruidSelectParser.java From Mycat2 with GNU General Public License v3.0 | 5 votes |
private HavingCols buildGroupByHaving(SQLExpr having,Map<String, String> aliaColumns ){ if (having == null) { return null; } SQLBinaryOpExpr expr = ((SQLBinaryOpExpr) having); SQLExpr left = expr.getLeft(); SQLBinaryOperator operator = expr.getOperator(); SQLExpr right = expr.getRight(); String leftValue = null;; if (left instanceof SQLAggregateExpr) { leftValue = ((SQLAggregateExpr) left).getMethodName() + "(" + ((SQLAggregateExpr) left).getArguments().get(0) + ")"; String aggrColumnAlias = getAliaColumn(aliaColumns,leftValue); if(aggrColumnAlias != null) { // having聚合函数存在别名 expr.setLeft(new SQLIdentifierExpr(aggrColumnAlias)); leftValue = aggrColumnAlias; } } else if (left instanceof SQLIdentifierExpr) { leftValue = ((SQLIdentifierExpr) left).getName(); } String rightValue = null; if (right instanceof SQLNumericLiteralExpr) { rightValue = right.toString(); }else if(right instanceof SQLTextLiteralExpr){ rightValue = StringUtil.removeBackquote(right.toString()); } return new HavingCols(leftValue,rightValue,operator.getName()); }
Example 6
Source File: DruidSelectOracleParser.java From Mycat2 with GNU General Public License v3.0 | 5 votes |
private void parseThreeLevelPageSql(SQLStatement stmt, RouteResultset rrs, SchemaConfig schema, SQLSubqueryTableSource from, SQLBinaryOpExpr one, SQLBinaryOperator operator) { SQLIntegerExpr right = (SQLIntegerExpr) one.getRight(); int firstrownum = right.getNumber().intValue(); if (operator == SQLBinaryOperator.GreaterThanOrEqual&&firstrownum!=0) { firstrownum = firstrownum - 1; } SQLSelectQuery subSelect = from.getSelect().getQuery(); if (subSelect instanceof OracleSelectQueryBlock) { //第二层子查询 OracleSelectQueryBlock twoSubSelect = (OracleSelectQueryBlock) subSelect; if (twoSubSelect.getWhere() instanceof SQLBinaryOpExpr && twoSubSelect.getFrom() instanceof SQLSubqueryTableSource) { SQLBinaryOpExpr twoWhere = (SQLBinaryOpExpr) twoSubSelect.getWhere(); boolean isRowNum = "rownum".equalsIgnoreCase(twoWhere.getLeft().toString()); boolean isLess = twoWhere.getOperator() == SQLBinaryOperator.LessThanOrEqual || twoWhere.getOperator() == SQLBinaryOperator.LessThan; if (isRowNum && twoWhere.getRight() instanceof SQLIntegerExpr && isLess) { int lastrownum = ((SQLIntegerExpr) twoWhere.getRight()).getNumber().intValue(); if (operator == SQLBinaryOperator.LessThan&&lastrownum!=0) { lastrownum = lastrownum - 1; } SQLSelectQuery finalQuery = ((SQLSubqueryTableSource) twoSubSelect.getFrom()).getSelect().getQuery(); if (finalQuery instanceof OracleSelectQueryBlock) { setLimitIFChange(stmt, rrs, schema, one, firstrownum, lastrownum); parseOrderAggGroupOracle(stmt,rrs, (OracleSelectQueryBlock) finalQuery, schema); isNeedParseOrderAgg=false; } } } } }
Example 7
Source File: ExpressionUtil.java From dble with GNU General Public License v2.0 | 5 votes |
/** * convert Expression to DNF Expression * * @param expr * @return */ public static SQLExpr toDNF(SQLExpr expr) { if (expr == null) return null; while (!isDNF(expr)) { SQLBinaryOpExpr binOpExpr = (SQLBinaryOpExpr) expr; if (binOpExpr.getOperator() == SQLBinaryOperator.BooleanOr) { expr = expandOrExpression(binOpExpr); } else if (binOpExpr.getOperator() == SQLBinaryOperator.BooleanAnd) { expr = expandAndExpression(binOpExpr); } } return expr; }
Example 8
Source File: ExpressionUtil.java From dble with GNU General Public License v2.0 | 5 votes |
/** * allow (A and B) and C * * @param expr * @return */ public static boolean isDNF(SQLExpr expr) { if (!isLogicalExpression(expr)) { return true; } SQLBinaryOpExpr binOpExpr = (SQLBinaryOpExpr) expr; SQLExpr left = binOpExpr.getLeft(); SQLExpr right = binOpExpr.getRight(); if (binOpExpr.getOperator() == SQLBinaryOperator.BooleanAnd) { boolean isAllNonLogicExpr = true; if (left instanceof SQLBinaryOpExpr) { SQLBinaryOpExpr leftBinaryOp = (SQLBinaryOpExpr) left; if (leftBinaryOp.getOperator() == SQLBinaryOperator.BooleanOr) { return false; } if (isLogicalExpression(leftBinaryOp)) { isAllNonLogicExpr = false; } } if (right instanceof SQLBinaryOpExpr) { SQLBinaryOpExpr rightBinaryOp = (SQLBinaryOpExpr) right; if (rightBinaryOp.getOperator() == SQLBinaryOperator.BooleanOr) { return false; } if (isLogicalExpression(rightBinaryOp)) { isAllNonLogicExpr = false; } } if (isAllNonLogicExpr) { return true; } } if (!isDNF(left)) { return false; } return isDNF(right); }
Example 9
Source File: ExpressionUtil.java From dble with GNU General Public License v2.0 | 5 votes |
private static boolean isLogicalExpression(SQLExpr expr) { //XOR? if (!(expr instanceof SQLBinaryOpExpr)) { return false; } SQLBinaryOpExpr binOpExpr = (SQLBinaryOpExpr) expr; return binOpExpr.getOperator() == SQLBinaryOperator.BooleanAnd || binOpExpr.getOperator() == SQLBinaryOperator.BooleanOr; }
Example 10
Source File: FieldMaker.java From elasticsearch-sql with Apache License 2.0 | 5 votes |
public static SQLMethodInvokeExpr makeBinaryMethodField(SQLBinaryOpExpr expr, String alias, boolean first) throws SqlParseException { List<SQLExpr> params = new ArrayList<>(); String scriptFieldAlias; if (first && (alias == null || alias.equals(""))) { scriptFieldAlias = "field_" + SQLFunctions.random(); } else { scriptFieldAlias = alias; } params.add(new SQLCharExpr(scriptFieldAlias)); switch (expr.getOperator()) { case Add: return convertBinaryOperatorToMethod("add", expr); case Multiply: return convertBinaryOperatorToMethod("multiply", expr); case Divide: return convertBinaryOperatorToMethod("divide", expr); case Modulus: return convertBinaryOperatorToMethod("modulus", expr); case Subtract: return convertBinaryOperatorToMethod("subtract", expr); default: throw new SqlParseException(expr.getOperator().getName() + " is not support"); } }
Example 11
Source File: MycatSchemaStatVisitor.java From Mycat2 with GNU General Public License v3.0 | 4 votes |
@Override public boolean visit(SQLBinaryOpExpr x) { x.getLeft().setParent(x); x.getRight().setParent(x); /* * fix bug 当 selectlist 存在多个子查询时, 主表没有别名的情况下.主表的查询条件 被错误的附加到子查询上. * eg. select (select id from subtest2 where id = 1), (select id from subtest3 where id = 2) from subtest1 where id =4; * 像这样的子查询, subtest1 的 过滤条件 id = 4 . 被 加入到 subtest3 上. 加别名的情况下正常,不加别名,就会存在这个问题. * 这里设置好操作的是哪张表后,再进行判断. */ String currenttable = x.getParent()==null?null: (String) x.getParent().getAttribute(SchemaStatVisitor.ATTR_TABLE); if(currenttable!=null){ this.setCurrentTable(currenttable); } switch (x.getOperator()) { case Equality: case LessThanOrEqualOrGreaterThan: case Is: case IsNot: case GreaterThan: case GreaterThanOrEqual: case LessThan: case LessThanOrEqual: case NotLessThan: case LessThanOrGreater: case NotEqual: case NotGreaterThan: handleCondition(x.getLeft(), x.getOperator().name, x.getRight()); handleCondition(x.getRight(), x.getOperator().name, x.getLeft()); handleRelationship(x.getLeft(), x.getOperator().name, x.getRight()); break; case BooleanOr: //永真条件,where条件抛弃 if(!RouterUtil.isConditionAlwaysTrue(x)) { hasOrCondition = true; WhereUnit whereUnit = null; if(conditions.size() > 0) { whereUnit = new WhereUnit(); whereUnit.setFinishedParse(true); whereUnit.addOutConditions(getConditions()); WhereUnit innerWhereUnit = new WhereUnit(x); whereUnit.addSubWhereUnit(innerWhereUnit); } else { whereUnit = new WhereUnit(x); whereUnit.addOutConditions(getConditions()); } whereUnits.add(whereUnit); } return false; case Like: case NotLike: default: break; } return true; }