My hash object in hash object wouldn't work

imdickson — Thu, 13 Dec 2018 13:14:05 GMT

As per title, my hash object within hash object wouldn't work. I currently have a script to do lookup using hash object.

The joining key for the first hash object is "Mnemonic_tnbt" and "voltage".

When i find(), whatever that can be mapped by the Key will be populated.

For those that do not match with the given key(rc ne 0), I wish to use hash object to lookup another round with just "Mnemonic_tnbt" as key.

Here are my codes:

data work.ncp_load_ret (drop=excp_code re_state re_supply_zone)
     work.excp_ncp_load_re;
  length excp_code $50 re_state re_supply_zone $30;
  attrib region length=$30 label='Region';
  attrib zone length=$2 label='LF and LD Zone';
  attrib state_code length=$5 label='State Code';
  attrib state length=$30 label='State Name';
  attrib business_area_code length=$30 label='Business Area Code';
  attrib business_area length=$50 label='Business Area';
  attrib supply_zone_code length=$30 label='Supply Zone Code - 33kV';
  attrib supply_zone length=$50 label='Supply Zone - 33kV';
  attrib mnemonic_tnbt length=$30 label='PMU Mnemonic in TNBT Web';
  attrib supply_zone_code length=$30 label='Supply Zone Code 33kV';
  attrib supply_zone length=$50 label='Supply Zone 33kV';
  attrib sub_supply_zone_code length=$30 label='Sub Supply Zone Code 11kV';
  attrib sub_supply_zone length=$50 label='Sub Supply Zone 11kV';
  attrib pmu_state length=$30 label='PMU State';
  attrib pmu_link length=$50 label='Link to PMU';
  attrib pmu_name length=$50 label='PMU Name in TNBT Web';
  attrib substation_name_tnbt length=$50 label='Substation/PMU Name in TNBT Web';
  attrib substation_name_psi length=$50 label='Substation/PMU Name as per PSI Scada';
  attrib substation_type length=$10 label='Substation Type';
  attrib functional_location length=$30 label='Functional Location';
  attrib voltage length=8 label='Voltage Transformation';

  attrib	re_state	LENGTH=	$30.;	
attrib	re_station	LENGTH=	$50.	;
attrib	re_ca_no	LENGTH=	$20.;	
attrib	re_customer_name	LENGTH=	$100.	;
attrib	re_capacity	LENGTH=	8	;
attrib	re_commission_date	LENGTH=	8	format=date9.;
attrib	re_technology	LENGTH=	$30.;	
attrib	pmu	LENGTH=	$30.;	
attrib	ppu	LENGTH=	$30.;	
attrib	ssu_pe	LENGTH=	$30.;	
attrib	re_switch_no	LENGTH=	$30.;	
attrib	re_vcb_brand_and_model	LENGTH=	$30.;	
attrib	scada_y_n	LENGTH=	$3.	;
attrib	gps_coordinate	LENGTH=	$30.	;
attrib	re_plant_manager_phone_number	LENGTH=	$15.	;
attrib	re_plant_manager_name	LENGTH=	$50.;	
attrib	re_plant_manager_email	LENGTH=	$50.;	
attrib	re_highest_md_recorded_a	LENGTH=	8	;
attrib	re_highest_md_recorded_kw	LENGTH=	8	;
attrib	re_total_energy_sold	LENGTH=	8;	
attrib	re_kwh_reading	LENGTH=	8	;
attrib	re_gen_factor_pct	LENGTH=	8	;
attrib	period	LENGTH=	8	format=YYMMN6.;
attrib status length=$30.;


  attrib geo_longitude length=$30 label='Point: Geo Longitude';
  attrib geo_latitude length=$30 label='Point: Geo Latitude';
  attrib active_flag length=$1. label='Active Flag';					
  attrib program length=$7.;			
  attrib scod_date length=8 format=date9.;				
  attrib kick_off_date length=8 format=date9.;	
  attrib iom_date length=8 format=date9.;
  attrib data_dttm length=8 format=datetime. label='Data Date and Time';

  if _n_=1 then do;
     declare hash pmu_list(dataset:"ncp_asset_pmu");
     pmu_list.definekey('mnemonic_tnbt','voltage');
     pmu_list.definedata('region','zone','state_code','state',
                         'business_area_code','business_area',
                         'supply_zone_code','supply_zone',
                         'sub_supply_zone_code','sub_supply_zone',
                         'pmu_name','substation_name_tnbt','functional_location');
     pmu_list.definedone();
     call missing(region,zone,state_code,state,
                  business_area_code,business_area,
                  supply_zone_code,supply_zone,
                  sub_supply_zone_code,sub_supply_zone,
                  pmu_name,substation_name_tnbt,functional_location);
  end;
  set asset_re (RENAME=(pmu=mnemonic_tnbt voltage=voltage_));
  data_dttm=datetime();
voltage=voltage_;
mnemonic_tnbt=strip(mnemonic_tnbt);
  pmu=mnemonic_tnbt;
re_state=state;
re_station=station;
re_ca_no=ca_no;
re_customer_name=applicant_name;
re_capacity=capacity;
re_commission_date=commission_date;
re_technology=technology;
re_vcb_brand_and_model=vcb_brand_and_model;
re_plant_manager_phone_number=plant_manager_phone_number;
re_plant_manager_name=plant_manager_name;
re_plant_manager_email=plant_manager_email;
re_highest_md_recorded_a=highest_md_recorded_a;
re_highest_md_recorded_kw=highest_md_recorded_kw;
re_total_energy_sold=total_energy_sold;
re_kwh_reading=kwh_reading;
re_gen_factor_pct=gen_factor_pct;


  rc=pmu_list.find();
  if (rc^=0) then do;
output work.ncp_load_ret;
/*I am not sure if the output statement above should be placed there or not*/
  	declare hash pmu2_list(dataset:"ncpdm.ncp_asset_pmu");
     pmu2_list.definekey('mnemonic_tnbt');
     pmu2_list.definedata('region','zone','state_code','state',
                         'business_area_code','business_area',
                         'supply_zone_code','supply_zone',
                         'sub_supply_zone_code','sub_supply_zone',
                         'pmu_name','substation_name_tnbt','functional_location');
     pmu2_list.definedone();
     call missing(region,zone,state_code,state,
                  business_area_code,business_area,
                  supply_zone_code,supply_zone,
                  sub_supply_zone_code,sub_supply_zone,
                  pmu_name,substation_name_tnbt,functional_location);
  end;
  rc=pmu2_list.find();
	output work.ncp_load_ret;


  keep mnemonic_tnbt excp_code re_state re_supply_zone
       region zone state_code state business_area_code business_area
       supply_zone_code supply_zone sub_supply_zone_code sub_supply_zone
       pmu_name substation_name_tnbt functional_location voltage
       re_state
re_station
re_ca_no
re_customer_name
re_capacity
re_commission_date
re_technology
pmu
ppu
ssu_pe
re_switch_no
voltage
re_vcb_brand_and_model
scada_y_n
gps_coordinate
re_plant_manager_phone_number
re_plant_manager_name
re_plant_manager_email
re_highest_md_recorded_a
re_highest_md_recorded_kw
re_total_energy_sold
re_kwh_reading
re_gen_factor_pct
period
 data_dttm
 active_flag
status	
program				
scod_date				
kick_off_date		
iom_date
geo_longitude
geo_latitude
;
run;

The log file:

NOTE: Character values have been converted to numeric values at the places given by: (Line):(Column).
      667:8    667:19   667:33   668:8    668:19   668:33   
NOTE: Numeric values have been converted to character values at the places given by: (Line):(Column).
      667:30   668:30   
NOTE: Variable excp_code is uninitialized.
NOTE: Variable re_supply_zone is uninitialized.
NOTE: Variable pmu_state is uninitialized.
NOTE: Variable pmu_link is uninitialized.
NOTE: Variable substation_name_psi is uninitialized.
NOTE: Variable substation_type is uninitialized.
WARNING: The variable voltage2 in the DROP, KEEP, or RENAME list has never been referenced.
WARNING: The variable voltage2 in the DROP, KEEP, or RENAME list has never been referenced.
NOTE: There were 521 observations read from the data set WORK.NCP_ASSET_PMU.
ERROR: Uninitialized object at line 690 column 6.
ERROR: DATA STEP Component Object failure.  Aborted during the EXECUTION phase.

Which part did i do wrongly?

Re: My hash object in hash object wouldn't work

Kurt_Bremser — Thu, 13 Dec 2018 13:39:57 GMT

Move the second hash declaration/initialization into the _N_ = 1 block. You do the declare conditionally, but the find unconditionally. Also note that repeated declare's of a hash will eat your memory away. If you need to re-initialize a hash (for which I see no reason here, as you always read the same dataset), use the clear() method to free the space.

And you need to do some thorough cleanup of your code to get rid of the automatic type conversions, uninitialized and never defined variable NOTEs and WARNINGs.

Re: My hash object in hash object wouldn't work

imdickson — Thu, 13 Dec 2018 13:54:54 GMT

Thanks for your advice. I tried to change my script based on my understanding to your reply.

Here is my code:

if _n_=1 then do;
     declare hash pmu_list(dataset:"ncp_asset_pmu");
     pmu_list.definekey('mnemonic_tnbt','voltage');
     pmu_list.definedata('region','zone','state_code','state',
                         'business_area_code','business_area',
                         'supply_zone_code','supply_zone',
                         'sub_supply_zone_code','sub_supply_zone',
                         'pmu_name','substation_name_tnbt','functional_location');
     pmu_list.definedone();

     call missing(region,zone,state_code,state,
                  business_area_code,business_area,
                  supply_zone_code,supply_zone,
                  sub_supply_zone_code,sub_supply_zone,
                  pmu_name,substation_name_tnbt,functional_location);
				  declare hash pmu2_list(dataset:"ncpdm.ncp_asset_pmu");
     pmu2_list.definekey('mnemonic_tnbt');
     pmu2_list.definedata('region','zone','state_code','state',
                         'business_area_code','business_area',
                         'supply_zone_code','supply_zone',
                         'sub_supply_zone_code','sub_supply_zone',
                         'pmu_name','substation_name_tnbt','functional_location');
     pmu2_list.definedone();
     call missing(region,zone,state_code,state,
                  business_area_code,business_area,
                  supply_zone_code,supply_zone,
                  sub_supply_zone_code,sub_supply_zone,
                  pmu_name,substation_name_tnbt,functional_location);
  end;

set .....

assignment.....



  rc=pmu_list.find();
  if (rc^=0) then do;
  	     excp_code='Exception: Mnemonic_tnbt and Voltage not mapped to PMU master list';
		 output work.excp_ncp_load_re;
		  rc2=pmu2_list.find();
		  if (rc2^=0) then do;
		  excp_code='double lookup failed';
			output work.excp_ncp_load_re;
			end;
			output work.ncp_load_ret;
  end;
  output work.ncp_load_ret;

However, I am getting duplicate records which the 2nd hash lookup didnt "join/populate" at all. Do we need 2 output xxx like what i did?

Re: My hash object in hash object wouldn't work

Kurt_Bremser — Thu, 13 Dec 2018 14:06:04 GMT

First, I'd recommend some more consistent code formatting to identify semantic blocks:

if (rc^=0) then do;
  excp_code='Exception: Mnemonic_tnbt and Voltage not mapped to PMU master list';
  output work.excp_ncp_load_re;
  rc2=pmu2_list.find();
  if (rc2^=0) then do;
    excp_code='double lookup failed';
    output work.excp_ncp_load_re;
  end;
  output work.ncp_load_ret; /* I would remove this statement */
end;
output work.ncp_load_ret; /* this one is enough, as it is always executed */

Then, while testing with a reduced dataset (so your log doesn't explode), add put statements in the branches to see which ones are entered and when.

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