2025-07-16 06:42:16 +00:00
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char* ast = "{\"NodeType\":\"101\",\"Name\":\"SelectStmt\",\"SelectStmt\":{\"Distinct\":false,\"Projections\":[{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"9\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_1\",\"UserAlias\":\"_wstart\",\"Name\":\"_wstart\",\"Id\":\"89\",\"Type\":\"3505\",\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_2\",\"UserAlias\":\"sum(voltage)\",\"Name\":\"sum\",\"Id\":\"1\",\"Type\":\"14\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"4\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"voltage\",\"UserAlias\":\"voltage\",\"TableId\":\"6555383776122680534\",\"TableType\":\"1\",\"ColId\":\"3\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"meters\",\"TableAlias\":\"meters\",\"ColName\":\"voltage\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"4\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"#expr_3\",\"UserAlias\":\"groupid\",\"Name\":\"_group_key\",\"Id\":\"96\",\"Type\":\"3754\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"4\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"#expr_3\",\"UserAlias\":\"groupid\",\"TableId\":\"6555383776122680534\",\"TableType\":\"1\",\"ColId\":\"5\",\"ProjId\":\"0\",\"ColType\":\"2\",\"DbName\":\"test\",\"TableName\":\"meters\",\"TableAlias\":\"meters\",\"ColName\":\"groupid\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}}],\"From\":{\"NodeType\":\"6\",\"Name\":\"RealTable\",\"RealTable\":{\"DataType\":{\"Type\":\"0\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"0\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"DbName\":\"test\",\"tableName\":\"meters\",\"tableAlias\":\"meters\",\"MetaSize\":\"475\",\"Meta\":{\"VgId\":\"0\",\"TableType\":\"1\",\"Uid\":\"6555383776122680534\",\"Suid\":\"6555383776122680534\",\"Sversion\":\"1\",\"Tversion\":\"1\",\"ComInfo\":{\"NumOfTags\":\"2\",\"Precision\":\"0\",\"NumOfColumns\":\"4\",\"RowSize\":\"20\"},\"ColSchemas\":[{\"Type\":\"9\",\"ColId\":\"1\",\"bytes\":\"8\",\"Name\":\"ts\"},{\"Type\":\"6\",\"ColId\":\"2\",\"bytes\":\"4\",\"Name\":\"current\"},{\"Type\":\"4\",\"ColId\":\"3\",\"bytes\":\"4\",\"Name\":\"voltage\"},{\"Type\":\"6\",\"ColId\":\"4\",\"bytes\":\"4\",\"Name\":\"phase\"},{\"Type\":\"4\",\"ColId\":\"5\",\"bytes\":\"4\",\"Name\":\"groupid\"},{\"Type\":\"8\",\"ColId\":\"6\",\"bytes\":\"26\",\"Name\":\"location\"}]},\"VgroupsInfoSize\":\"1340\",\"VgroupsInfo\":{\"Num\":\"2\",\"Vgroups\":[{\"VgId\":\"2\",\"HashBegin\":\"0\",\"HashEnd\":\"2147483646\",\"EpSet\":{\"InUse\":\"0\",\"NumOfEps\":\"1\",\"Eps\":[{\"Fqdn\":\"localhost\",\"Port\":\"6030\"}]},\"NumOfTable\":\"0\"},{\"VgId\":\"3\",\"HashBegin\":\"2147483647\",\"HashEnd\":\"4294967295\",\"EpSet\":{\"InUse\":\"0\",\"NumOfEps\":\"1\",\"Eps\":[{\"Fqdn\":\"localhost\",\"Port\":\"6030\"}]},\"NumOfTable\":\"0\"}]}}},\"PartitionBy\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"4\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"groupid\",\"UserAlias\":\"groupid\",\"TableId\":\"6555383776122680534\",\"TableType\":\"1\",\"ColId\":\"5\",\"ProjId\":\"0\",\"ColType\":\"2\",\"DbName\":\"test\",\"TableName\":\"meters\",\"TableAlias\":\"meters\",\"ColName\":\"groupid\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"Window\":{\"NodeType\":\"14\",\"Name\":\"IntervalWindow\",\"IntervalWindow\":{\"Interval\":{\"NodeType\":\"2\",\"Name\":\"Value\",\"Value\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"115\",\"Bytes\":\"8\"},\"AliasName\":\"c804c3a15ebe05b5baf40ad5ee12be1f\",\"UserAlias\":\"2s\",\"LiteralSize\":\"2\",\"Literal\":\"2s\",\"Duration\":true,\"Translate\":true,\"NotReserved\":false,\"IsNull\":false,\"Unit\":\"1
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// char* ast = "{\"NodeType\":\"101\",\"Name\":\"SelectStmt\",\"SelectStmt\":{\"Distinct\":false,\"Projections\":[{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"9\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_1\",\"UserAlias\":\"wstart\",\"Name\":\"_wstart\",\"Id\":\"89\",\"Type\":\"3505\",\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"2\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"#expr_2\",\"UserAlias\":\"min(c1)\",\"Name\":\"min\",\"Id\":\"2\",\"Type\":\"8\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"2\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"c1\",\"UserAlias\":\"c1\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"2\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c1\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"3\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"2\"},\"AliasName\":\"#expr_3\",\"UserAlias\":\"max(c2)\",\"Name\":\"max\",\"Id\":\"3\",\"Type\":\"7\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"3\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"2\"},\"AliasName\":\"c2\",\"UserAlias\":\"c2\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"3\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c2\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"4\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"Name\":\"cast\",\"Id\":\"77\",\"Type\":\"2000\",\"Parameters\":[{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_4\",\"UserAlias\":\"sum(c3)\",\"Name\":\"sum\",\"Id\":\"1\",\"Type\":\"14\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"4\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"c3\",\"UserAlias\":\"c3\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"4\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c3\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"2\",\"Name\":\"Value\",\"Value\":{\"DataType\":{\"Type\":\"2\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"LiteralSize\":\"0\",\"Duration\":false,\"Translate\":true,\"NotReserved\":true,\"IsNull\":false,\"Unit\":\"0\",\"Datum\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_5\",\"UserAlias\":\"first(c4)\",\"Name\":\"first\",\"Id\":\"33\",\"Type\":\"504\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"c4\",\"UserAlias\":\"c4\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"5\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c4\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}},{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"9\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"ts\",\"UserAlias\":\"ts\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"1\",\"ProjId\":
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\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"ts\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"11\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"#expr_6\",\"UserAlias\":\"last(c5)\",\"Name\":\"last\",\"Id\":\"36\",\"Type\":\"506\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"11\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"c5\",\"UserAlias\":\"c5\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"6\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c5\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}},{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"9\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"ts\",\"UserAlias\":\"ts\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"1\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"ts\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"12\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"2\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"Name\":\"cast\",\"Id\":\"77\",\"Type\":\"2000\",\"Parameters\":[{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"7\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_7\",\"UserAlias\":\"apercentile(c6, 50)\",\"Name\":\"apercentile\",\"Id\":\"12\",\"Type\":\"1\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"12\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"2\"},\"AliasName\":\"c6\",\"UserAlias\":\"c6\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"7\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c6\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}},{\"NodeType\":\"2\",\"Name\":\"Value\",\"Value\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"c0c7c76d30bd3dcaefc96f40275bdc0a\",\"UserAlias\":\"50\",\"LiteralSize\":\"2\",\"Literal\":\"50\",\"Duration\":false,\"Translate\":true,\"NotReserved\":true,\"IsNull\":false,\"Unit\":\"0\",\"Datum\":\"50\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"2\",\"Name\":\"Value\",\"Value\":{\"DataType\":{\"Type\":\"2\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"LiteralSize\":\"0\",\"Duration\":false,\"Translate\":true,\"NotReserved\":true,\"IsNull\":false,\"Unit\":\"0\",\"Datum\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"13\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"Name\":\"cast\",\"Id\":\"77\",\"Type\":\"2000\",\"Parameters\":[{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"7\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_8\",\"UserAlias\":\"avg(c7)\",\"Name\":\"avg\",\"Id\":\"8\",\"Type\":\"2\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"13\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"c7\",\"UserAlias\":\"c7\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"8\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c7\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"2\",\"Name\":\"Value\",\"Value\":{\"Data
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Type\":{\"Type\":\"2\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"LiteralSize\":\"0\",\"Duration\":false,\"Translate\":true,\"NotReserved\":true,\"IsNull\":false,\"Unit\":\"0\",\"Datum\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"14\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"Name\":\"cast\",\"Id\":\"77\",\"Type\":\"2000\",\"Parameters\":[{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"5\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"#expr_9\",\"UserAlias\":\"count(c8)\",\"Name\":\"count\",\"Id\":\"0\",\"Type\":\"3\",\"Parameters\":[{\"NodeType\":\"1\",\"Name\":\"Column\",\"Column\":{\"DataType\":{\"Type\":\"14\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"8\"},\"AliasName\":\"c8\",\"UserAlias\":\"c8\",\"TableId\":\"5129202035162885657\",\"TableType\":\"1\",\"ColId\":\"9\",\"ProjId\":\"0\",\"ColType\":\"1\",\"DbName\":\"test\",\"TableName\":\"at_once_interval_ext_stb\",\"TableAlias\":\"at_once_interval_ext_stb\",\"ColName\":\"c8\",\"DataBlockId\":\"0\",\"SlotId\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"2\",\"Name\":\"Value\",\"Value\":{\"DataType\":{\"Type\":\"2\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"1\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"LiteralSize\":\"0\",\"Duration\":false,\"Translate\":true,\"NotReserved\":true,\"IsNull\":false,\"Unit\":\"0\",\"Datum\":\"0\"}}],\"UdfBufSize\":\"0\"}},{\"NodeType\":\"5\",\"Name\":\"Function\",\"Function\":{\"DataType\":{\"Type\":\"6\",\"Precision\":\"0\",\"Scale\":\"0\",\"Bytes\":\"4\"},\"AliasName\":\"\",\"UserAlias\":\"\",\"Name\":\"cast\",\"Id\":\"77\",\"Type\":\"2000\",\"Parameters\":[{\"Node
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