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SQLite: Get field names from table
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Author
Topic: SQLite: Get field names from table (Read 1853 times)
Milsa
Sr. Member
Posts: 309
SQLite: Get field names from table
«
on:
September 27, 2021, 07:54:59 pm »
I have this fragment of code:
Code: Pascal
[Select]
[+]
[-]
SQL
.
Text
:
=
Format
(
'SELECT * FROM [%s]'
,
[
Name
]
)
;
Open
;
while
not
EOF
do
begin
//detecting field names
Next
;
end
;
Close
;
Can I detect field names from TSQLQuery like "Fields[0].Name"?
Logged
I work with Lazarus 2.2.2, FPC 3.2.2, date 2022-05-15
This information is actual to: 28st Dec 2022
dseligo
Hero Member
Posts: 1221
Re: SQLite: Get field names from table
«
Reply #1 on:
September 28, 2021, 07:49:52 am »
This works with ZEOSlib:
Code: Pascal
[Select]
[+]
[-]
For
i
:
=
0
to
Fields
.
Count
-
1
do
showMessage
(
Fields
[
i
]
.
FieldName
)
;
Logged
Zvoni
Hero Member
Posts: 2327
Re: SQLite: Get field names from table
«
Reply #2 on:
September 28, 2021, 08:39:06 am »
Use "GetFieldNames" of TSQLite3Connection
of TSQLConnection (SQLite3Connection inherits from it)
--> TSQLite3Connection overrides the one from TSQLConnection
https://www.freepascal.org/daily/packages/fcl-db/sqlite3conn/tsqlite3connection.getfieldnames.html
https://www.freepascal.org/docs-html/fcl/sqldb/tsqlconnection.getfieldnames.html
EDIT: Alternative is to fire a PRAGMA-Call from a TSQLQuery-Object
Code: Pascal
[Select]
[+]
[-]
MySQLQuery
.
SQL
.
Text
:
=
'PRAGMA table_info(MyTableName)'
;
MySQLQuery
.
Open
;
«
Last Edit: September 28, 2021, 11:07:16 am by Zvoni
»
Logged
One System to rule them all, One Code to find them,
One IDE to bring them all, and to the Framework bind them,
in the Land of Redmond, where the Windows lie
---------------------------------------------------------------------
Code is like a joke: If you have to explain it, it's bad
Milsa
Sr. Member
Posts: 309
Re: SQLite: Get field names from table
«
Reply #3 on:
October 02, 2021, 01:40:49 pm »
Thank you very much. This is solution for me.
Logged
I work with Lazarus 2.2.2, FPC 3.2.2, date 2022-05-15
This information is actual to: 28st Dec 2022
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