Hi All,
I call a web service to get current time info in json. Mainly did for learning purposes a while back.
The json can contain null for 2 fields (dst_until and dst_from) when NOT in DST. During DST they contain data.
When I ran into this when creating the pgm I had trouble figuring out where to use the null indicator when fetching into a DS. To get around this I just load into the DS fields.
Is there a way to fetch into the DS identifying the null indicator? NullUntil and NullFrom are defined as Int(5).
I know about using YAJL but want to understand both ways.
// Parse json Results From API Call using SQL
Dcl-ds SQLResults Qualified;
week_number Int(10);
utc_offset VarChar(100);
utc_datetime VarChar(100);
unixtime Int(10);
timezone VarChar(100);
raw_offset Int(10);
dst_until VarChar(100);
dst_offset Int(10);
dst_from VarChar(100);
dst VarChar(10);
day_of_year Int(10);
day_of_week Int(10);
datetime VarChar(100);
client_ip VarChar(100);
abbreviation VarChar(100);
End-Ds;
Exec SQL declare C1 cursor for
Select *
from JSON_TABLE(Get_CLOB_From_File('/iaccess/html/currenttime.json'),
'lax $'
Columns(week_number Integer Path '$.week_number',
utc_offset VarChar(100) Path '$.utc_offset',
utc_datetime VarChar(100) Path '$.utc_datetime',
unixtime Integer Path '$.unixtime',
timezone VarChar(100) Path '$.timezone',
raw_offset Integer Path '$.raw_offset',
dst_until VarChar(100) Path '$.dst_until'
Default ' ' On Empty
Default ' ' On Error,
dst_offset Integer Path '$.dst_offset',
dst_from VarChar(100) Path '$.dst_from'
Default ' ' On Empty
Default ' ' On Error,
dst VarChar(10) Path '$.dst',
day_of_year Integer Path '$.day_of_year',
day_of_week Integer Path '$.day_of_week',
datetime VarChar(100) Path '$.datetime',
client_ip VarChar(100) Path '$.client_ip',
abbreviation VarChar(100) Path '$.abbreviation')) x;
Exec SQL Open C1;
DoU Done;
// Exec SQL Fetch next from C1 into :SQLResults;
Exec SQL Fetch next from C1 into :SQLResults.week_number,
:SQLResults.utc_offset,
:SQLResults.utc_datetime,
:SQLResults.unixtime,
:SQLResults.timezone,
:SQLResults.raw_offset,
:SQLResults.dst_until :NullUntil,
:SQLResults.dst_offset,
:SQLResults.dst_from :NullFrom,
:SQLResults.dst,
:SQLResults.day_of_year,
:SQLResults.day_of_week,
:SQLResults.datetime,
:SQLResults.client_ip,
:SQLResults.abbreviation;
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