Totcat1/1/2024 While the merger was made official this week, a full consolidation of the two organizations is expected to last 18 months. If made possible, the agreements with both operators would bolster NT’s service quality and back-office efficiency cementing its vision of becoming a top three mobile operator contender by the end of 2021. Wasting no time, NT has opened talks with Advanced Info Service (AIS) and True Move H Universal Communication (TUC) in hopes of infrastructure sharing on its 700-megahertz spectrum network as well as roaming agreements to make use of the 2600MHz range occupied by the two major operators. Initially, the merger was made possible due to a strong private sector competition, especially within Thailand, with the approach mainly aimed toward reducing costs and streamlining operation however, no staff cuts have been announced. Under the merger, the company has rebranded itself as National Telecom (NT) and will look to capitalize on overlapping administrative staff in departments such as finance, human resources, and legal. This data type hinting is parsed by the FDSQLiteTypeName2ADDataType procedure that takes and parses column name in format :: in its AColName parameter.Thailand’s state-owned telecommunications operator TOT has finally completed a long-awaited merger with CAT Telecom, which aims to become one of the top three mobile service provider in the country by the end of the year. I did a small optimization by using BETWEEN operator (which evaluates the column value only once), and used an escape sequence for date constants (which, in real you replace by parameter, I guess so just for curiosity). this way (I used BIGINT, but you can use any pseudo data type that maps to a 64-bit signed integer data type and is not auto incrementing, which corresponds to your persistent TLargeIntField field): SELECT To explicitly specify the column data type, When empty, FireDAC describes thoseĬolumns as dtWideString. When the result set is not empty, FireDAC uses the valueĭata types from the first record. This behavior is described in Adjusting FireDAC Mapping chapter of the FireDAC's SQLite manual:įor an expression in a SELECT list, SQLite avoids type name Is there a way I can make this work with persistent fields, or am I going to have to throw out the persistent fields and then add the TeeChart Series at runtime? However, in order to use the TeeChart editor in the IDE, it appears I need persistent fields. If I remove the persistent fields, the query will open without problems on an empty return set. I have tried using CAST in the query and it did not seem to make any difference. From what I can tell, SQLite defaults to the wide string field when no data is returned. I have done plenty of searching for solutions on the web on how to prevent this error on an empty query, but have had not luck with anything I found. QryGrpahRuntime: Type mismatch for field 'DeviceTotal', expecting: LargeInt actual: Widestring However, if there are no records for the requested dates, I get an EDatabaseError exception with the message: As long as the query returns some records, all this works. I run this query in a program to create a TeeChart, which I created at design time. Using the Field Editor in the Delphi IDE, I can add two persistent fields, getting TheDate as a TDateTimeField and DeviceTotal as a TLargeIntField. WHERE (DayTime >= "") and (DayTime <= "") I access the table using a TFDQuery called qryGrpahRuntime with the following SQL: SELECT DayTime AS TheDate, Sum(Device1) As DeviceTotal My SQLite database has two fields, created with: CREATE TABLE HistoryRuntime ('DayTime' DateTime, Device1 INTEGER DEFAULT (0))
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