PgSQL在强制转换后插入select

我有一个表，其中有许多列存储为文本。这些列包含我计划强制转换的信息，并将数据复制到具有相同列名但数据类型正确的新表中（float8）

我用CAST操作符测试了SELECT:“它工作得很好。正如您在图片中所看到的，所有列都正在转换

但是，当我取消对INSERT语句（位于其上方）的注释以开始在目标表中写入时，它会抛出一个错误。目标表具有相同的列名，并且只有8种列类型

源表中的表达式确实是text类型，但我使用的是cast操作符，所以为什么它在只运行SELECT语句时不能像以前那样工作呢

我的问题如下：

INSERT INTO "PM"."new_VM_gcell_evolution_hourly_BSC"
(select 
"CR3120:Channel_Assignment_Failures_All_Channels_Busy_or_Channel"::float8,
"DL_Mean_Quality"::float8,
"A312Ca:Failed_Assignments_during_MTC_on_the_A_Interface_Includi"::float8,
"nsp_Urban_TA_4number"::float8,
"A3129C:Failed_Assignments_First_Assignment,_Assignment_Timed_Ou"::float8,
"R3120C:Channel_Assignment_Failures_All_Channels_Busy_or_Channel"::float8,
"TSs_Interf_B5"::float8,
"R3120D:Channel_Assignment_Failures_All_Channels_Busy_or_Channel"::float8,
"HO_Out_Internal_Succ_Rate"::float8,
"CH_Req_Protocol_Undefinednbnumber"::float8,
"UL_Drop_Congnumber"::float8,
"Timing_Adv"::float8,
"DL_Qual"::float8,
"A3100C:Assignment_Requests_TCHH_Only"::float8,
"MS_to_BTS_max_distance"::float8,
"TSs_Interf_B2"::float8,
"UL_Qual"::float8,
"UL_Drop_EDGE_Rate"::float8,
"Avg_BTS_Power_Level_AMR"::float8,
"DL_Drop_N3105number"::float8,
"nsp_Urban_TA_2_R"::float8,
"CH_Req_CallReestabnbnumber"::float8,
"TCH_Drops_cause_Timing_Advance"::float8,
"TCH_Drops_per_Erlang"::float8,
"UL_Drop_Flushnumber"::float8,
"A312F:Number_of_Assignment_Failures_No_Abis_Resource_Available"::float8,
"UL_Drop_GPRS_Rate"::float8,
"nsp_Urban_TA_3number"::float8,
"Call_Drop_rate"::float8,
"DL_Fail_Assingnumber"::float8,
"SDCCH_Radio_Failures"::float8,
"HO_Cmd_UL_Qual"::float8,
"UL/DL_RxQualnumber"::float8,
"UL/DL_RxLevnumber"::float8,
"UL_Fail_EDGE_Rate"::float8,
"Call_Drop_Total"::float8,
"HO_Out_Succ_Rate"::float8,
"Date"::text,
"A3127E:Failed_Assignments_during_Call_Reestablishment_on_the_Um"::float8,
"UL_Drop_N3103number"::float8,
"Configured_TCH"::float8,
"SDCCH_Drop_Call_Rate_only_LU"::float8,
"A312M:Failed_Assignments_Reconnection_to_Old_Channels,_No_Chann"::float8,
"SDCCH_Blocking_Rate"::float8,
"TCH_Drops_cause_DL_FER"::float8,
"TCH_Fail_rate"::float8,
"DL_Drop_Preemnumber"::float8,
"FR_Traffic_totalErl"::float8,
"DL_Congnumber"::float8,
"TCH_Assign_Unsuccnumber"::float8,
"nsp_Urban_TA_0_R"::float8,
"DL_Drop_GPRS_Rate"::float8,
"HR_TraficErl"::float8,
"SDCCH_Cong_Rate"::float8,
"Abis_and_Ater_Interface_Anlysistimes"::float8,
"A3100B:Assignment_Requests_TCHF_Only"::float8,
"AS4300D:Mean_Uplink_Level_during_Radio_Link_Failure_SDCCHdB"::float8,
"nsp_Urban_TA_89number"::float8,
"TCH_Drops_cause_DownQual"::float8,
"SDCCH_Drop_RxLev"::float8,
"Max_UL_Pwr_Duration"::float8,
"nsp_Channel_Req_LUnumber"::float8,
"TCH_HR_Initialy_Config"::float8,
"HO_Inc_Cong_Rate"::float8,
"DL_RxLev_avgdBm"::float8,
"TCH_Assign_Requestsnumber"::float8,
"A312K:Failed_Assignments_First_Assignment,_No_Channel_Available"::float8,
"Call_Drop_TCH_Quality_Rate"::float8,
"AMR_HR_TraficErl"::float8,
"nsp_Urban_TA_67_R"::float8,
"UL_Fail_MSnumber"::float8,
"Time"::text,
"TCH_Drops_cause_UpLevel"::float8,
"AMR_FR_TraficErl"::float8,
"TCH_FR_Initialy_Config"::float8,
"UL_Drop_N3101number"::float8,
"DL_FERnumber"::float8,
"SDCCH_Drop_Call_Rate_wo_LU"::float8,
"DL_Mean_StrengthdB"::float8,
"Call_Drop_Abis"::float8,
"SDCCH_Initialy_Confignumber"::float8,
"Call_Drop_TCH_RxLev_Rate"::float8,
"TA_Meannumber"::float8,
"nsp_Urban_TA_67number"::float8,
"AS3240NA:Average_MS_Power_Level_of_NonAMR_Call"::float8,
"Load"::float8,
"A3129Q:Failed_Assignments_Reconnection_to_Old_Channels,_Timer_E"::float8,
"CH_Request_11_bit"::float8,
"AS4340D:Mean_TA_during_Radio_Link_Failure_SDCCH"::float8,
"S4210A:Uplink_Interference_Indication_Messages_SDCCH"::float8,
"UL_FERnumber"::float8,
"A3129P:Failed_Assignments_Reconnection_to_Old_Channels,_Timer_E"::float8,
"K3003A:Successful_SDCCH_Seizures_Call_Type"::float8,
"CH_Req_LAUnbnumber"::float8,
"SDCCH_Drop_Rate"::float8,
"GBSC"::text,
"CS_CSSR_with_SDCCH_blocks_wo_LU"::float8,
"A312Aa:Failed_Assignments_during_MOC_on_the_A_Interface_Includi"::float8,
"Avg_BTS_Power_Level"::float8,
"R3120A:Channel_Assignment_Failures_All_Channels_Busy_or_Channel"::float8,
"A312S:Failed_Assignments_Signaling_Channel"::float8,
"SD_Fail_MoC"::float8,
"UL_RxQual_avg"::float8,
"Call_Drop_HO"::float8,
"AS4330D:Mean_Downlink_Quality_during_Radio_Link_Failure_SDCCH"::float8,
"CH_Req_Emerg_Callsnbnumber"::float8,
"UL_RxQualnumber"::float8,
"UL_Fail_OtherCausenumber"::float8,
"A312Da:Failed_Assignments_during_Emergency_Call_on_the_A_Interf"::float8,
"UL_Drop_Preemnumber"::float8,
"TCH_Drops_cause_UpDown_FER"::float8,
"AS4320D:Mean_Downlink_Level_during_Radio_Link_Failure_SDCCHdB"::float8,
"A3129O:Failed_Assignments_First_Assignment,_Directed_Retry_Time"::float8,
"Max_DL_Pwr_Duration"::float8,
"UL_Drop_Suspendnumber"::float8,
"TCH_Assign_Congestionnumber"::float8,
"Transmission_Resource_Analysistimes"::float8,
"HO_Out_RxQual_rate"::float8,
"nsp_Urban_TA_1013number"::float8,
"A3129I:Failed_Assignments_Invalid_State"::float8,
"DL_Fail_OtherCausenumber"::float8,
"CR3129:Channel_Assignment_Failures_All_Channels_Busy_or_Channel"::float8,
"HO_Inc_Successnumber"::float8,
"A3129B:Failed_Assignments_First_Assignment,_Terrestrial_Resourc"::float8,
"Trafic_totalErl"::float8,
"nsp_urban_TA_1463all_R"::float8,
"HO_Out_RxQualnumber"::float8,
"DL_RxQualnumber"::float8,
"HO_Inc_Succ_Rate"::float8,
"SDCCH_Fail_Rate"::float8,
"SDCCH_Non_Radio_Drops"::float8,
"nsp_Urban_TA_0number"::float8,
"A3129E:Failed_Assignments_CIC_Unavailable"::float8,
"nsp_CH_Request_PSnumber"::float8,
"TCH_Assign_Unsucc_rate"::float8,
"Call_Drop_Radio"::float8,
"EFR_TraficErl"::float8,
"A312L:Failed_Assignments_Reconnection_to_Old_Channels,_No_Chann"::float8,
"TCH_Drops_cause_DownLevel"::float8,
"nsp_Urban_TA_5number"::float8,
"Abnormal_Terminals_Analysistimes"::float8,
"HO_Inc_Congnumber"::float8,
"CSSR_Rate"::float8,
"M3020C:Call_Drops_on_SDCCHQuality"::float8,
"RH333:Handover_Drop_Rate_of_TCH"::float8,
"UL_Drop_EDGE_Abisnumber"::float8,
"A3129J:Failed_Assignments_Invalid_Message"::float8,
"TCH_Availability"::float8,
"UL_Level"::float8,
"nsp_Urban_TA_4_R"::float8,
"UL_Drop_OtherCausenumber"::float8,
"HR_Traffic_Rate"::float8,
"DL_Level"::float8,
"CH_Request_8_bit"::float8,
"UL_Fail_MS_Assingnumber"::float8,
"DL_Fail_BSC_Commandnumber"::float8,
"A3129R:Failed_Assignments_Reconnection_to_Old_Channels,_Reconne"::float8,
"UL_Fail_BSC_Commandnumber"::float8,
"DL_Drop_Suspendnumber"::float8,
"nsp_urban_TA_1463allnumber"::float8,
"Direct_Retry"::float8,
"nsp_Urban_TA_89_R"::float8,
"CH_Req_PSnbnumber"::float8,
"A3129N:Failed_Assignments_Reconnection_to_Old_Channels,_Terrest"::float8,
"A312A:Failed_Assignments_First_Assignment,_No_Channel_Available"::float8,
"nsp_Urban_TA_2number"::float8,
"DL_RxQual_avg"::float8,
"UL_Mean_StrengthdB"::float8,
"DL_Drop_EDGE_Rate"::float8,
"A3129T:Failed_Assignments_No_Ater_Resource_Available"::float8,
"TSs_Interf_B1"::float8,
"A3129D:Failed_Assignments_Reconnection_to_Old_Channels,_Reconne"::float8,
"nsp_Channel_Req_MOCnumber"::float8,
"UL_Fail_GPRS_Rate"::float8,
"S4210B:Downlink_Interference_Indication_Messages_SDCCH"::float8,
"R3120E:Channel_Assignment_Failures_All_Channels_Busy_or_Channel"::float8,
"HO_Inc_Failnumber"::float8,
"DL_Drop_Flushnumber"::float8,
"S3655:Number_of_configured_TRXs_in_a_cell"::float8,
"TCH_Drops_cause_UpDown_Qual"::float8,
"CR3005:Number_of_Initially_Configured_Channels_Static_PDTCH_Sup"::float8,
"UL/DL_FERnumber"::float8,
"SDCCH_Blocking_"::float8,
"HO_Out_InterRAT_Succ_Rate"::text,
"CM30E:Call_Drops_on_SDCCH_Location_Updating"::float8,
"AS4310D:Mean_Uplink_Quality_during_Radio_Link_Failure_SDCCH"::float8,
"UL_Congnumber"::float8,
"TAnumber"::float8,
"Configured_SDCCH"::float8,
"Othernumber"::float8,
"TCH_Assign_Fail_Radionumber"::float8,
"HO_Out_Internal_Req_Nb"::float8,
"SDCCH_Cong_Nbnumber"::float8,
"UL_Mean_Quality"::float8,
"HO_Out_External_Req_Nb"::float8,
"nsp_Urban_TA_1013_R"::float8,
"SDCCH_Drops_wo_LU"::float8,
"Call_Drop_TCH_Qualitynumber"::float8,
"A3100A:Assignment_Requests_Signaling_Channel_TCH"::float8,
"Better_Cell"::float8,
"Call_Drop_TCH_RxLevnumber"::float8,
"nsp_Channel_Req_MTCnumber"::float8,
"DL_Fail_EDGE_Rate"::float8,
"ZTR104B:Call_Drop_Rate_on_SDCCH_Call_Type"::float8,
"Call_Drop_no_MR"::float8,
"DL_Drop_Congnumber"::float8,
"HO_Inc_InterRAT_reqnumber"::float8,
"TCH_Assign_Cong_rate"::float8,
"HO_Inc_Fail_Rate"::float8,
"TCH_Assign_Fail_sp_ver_unav"::float8,
"HO_Inc_InterRAT_unsucc"::float8,
"A3170A:Number_of_Completed_TCH_Assignments_CSFB_MOC"::float8,
"HO_Inc_Unsucc_Rate"::float8,
"TSs_Interf_B4"::float8,
"A3100K:Assignment_Requests_Signaling_Channel_SDCCH"::float8,
"TCH_Drops_cause_UpDown_Level"::float8,
"SDCCH_Fail_Nbnumber"::float8,
"TCH_Non_Radio_Drops"::float8,
"DL_Fail_MSnumber"::float8,
"HO_Cmd_DL_Qual"::float8,
"DL_Drop_OtherCausenumber"::float8,
"SMS_on_SDCCH"::float8,
"FERnumber"::float8,
"HO_Inc_Reqnumber"::float8,
"nsp_Urban_TA_3_R"::float8,
"M3020D:Call_Drops_on_SDCCHOther"::float8,
"HO_Out_External_Succ_Rate"::float8,
"M3020A:Call_Drops_on_SDCCHTA"::float8,
"TCH_Assign_Fail_Radio_rate"::float8,
"CR3001:Number_of_Initially_Configured_Channels_Static_PDCH"::float8,
"HR_Traffic_totalErl"::float8,
"CH_Req_MTCnbnumber"::float8,
"SDCCH_Drop_RxQual"::float8,
"UL_RxLev_avgdBm"::float8,
"CH_Req_MOCnbnumber"::float8,
"SDCCH_Dropnumber"::float8,
"A3169A:Failed_Assignments_Um_Cause"::float8,
"A3129H:Failed_Assignments_Clear_Commands_Sent_By_MSC"::float8,
"TCH_Radio_Drops"::float8,
"HO_Out_InterRAT_Req_Nb"::float8,
"HO_Inc_InterRAT_succnumber"::float8,
"DL_Drop_Abisnumber"::float8,
"TCH_Drops_cause_UL_FER"::float8,
"UL_RxLevelnumber"::float8,
"nsp_CH_Request_CSnumber"::float8,
"A3170B:Number_of_Completed_TCH_Assignments_CSFB_MTC"::float8,
"A3129F:Failed_Assignments_CIC_Allocated"::float8,
"DL_Fail_GPRS_Rate"::float8,
"M3020B:Call_Drops_on_SDCCHReceived_Level"::float8,
"nsp_Urban_TA_1number"::float8,
"SDCCH_Availability"::float8,
"Call_Drop_forced_HO"::float8,
"SDCCH_Drop_Others"::float8,
"Call_Drop_Equip."::float8,
"CH_Req_PS"::float8,
"SDCCH_Drop_Call_Rate"::float8,
"TCH_Drops_cause_UpQual"::float8,
"CH_Req_LMU_Reservednbnumber"::float8,
"DL_RxLevnumber"::float8,
"nsp_Urban_TA_1_R"::float8,
"A312Ea:Failed_Assignments_during_Call_Reestablishment_on_the_A_"::float8,
"TSs_Interf_B3"::float8,
"SDCCH_Drop_TimingAdvance"::float8,
"Avg_BTS_Power_Level_NAMR"::float8,
"TCH_Drops_cause_Other"::float8,
"FR_TraficErl"::float8,
"Avg_MS_Power_Level"::float8,
"HO_Outgoing_Requestsnumber"::float8,
"A3129G:Failed_Assignments_A_Interface_Failure"::float8,
"CH_Req_LAU"::float8,
"nsp_Urban_TA_5_R"::float8,
"HO_Inc_Unsuccessnumber"::float8,
"AS3240A:Average_MS_Power_Level_of_AMR_Call"::float8
from "PM"."VM_gcell_evolution_hourly_BSC_recovered")

它说“column是double类型的，但是expression是text类型的”，所以真正发生的事情是，它试图将您强制转换为：：text的表达式之一插入到double类型的列中

如果问题是从文本转换为双精度，则会收到不同的消息。此外，SELECT工作正常，这意味着它没有遇到任何无法转换为double的文本数据

由于INSERT中没有指定目标表列，而且有很多列，因此很可能遗漏了一列或顺序错误

---

老实说，如果表有270列，并且它们在源表和目标表中具有相同的名称，那么您应该使用类似python的方法从列列表中生成查询，这将比校对270行更快…

请不要将代码作为图像发布。请参见此处了解更多详细原因：通常我会发布代码，但这里有一个包含270列的表。这不是很难读取吗？这很奇怪，因为我正在转换的列数据类型是从信息模式中提取的目标表的数据类型，具有一对一映射，所以通常我不应该有“文本到双精度”的错误匹配。是的，但它们的顺序正确吗？是否尝试将列添加到插入？正确。我必须在insert命令中显式地添加列。虽然目标表具有相同的列，但它们的顺序不同。现在它起作用了