summaryrefslogtreecommitdiff
path: root/doc/reference/field.adoc
diff options
context:
space:
mode:
authorJohn Turner <jturner.usa@gmail.com>2025-09-14 00:16:10 -0400
committerJohn Turner <jturner.usa@gmail.com>2025-09-14 00:16:10 -0400
commitefcea3a80da7c4479d5fe168435ecc9fd06bdc72 (patch)
tree5cb0177e17b1b00a177f2e830e809f606334571b /doc/reference/field.adoc
downloadsqlite-kv-bench-efcea3a80da7c4479d5fe168435ecc9fd06bdc72.tar.gz
Squashed 'subprojects/boost-sqlite/' content from commit 3378e35
git-subtree-dir: subprojects/boost-sqlite git-subtree-split: 3378e353705271e569cf4ba15c467b840a39798c
Diffstat (limited to 'doc/reference/field.adoc')
-rw-r--r--doc/reference/field.adoc42
1 files changed, 42 insertions, 0 deletions
diff --git a/doc/reference/field.adoc b/doc/reference/field.adoc
new file mode 100644
index 0000000..572719d
--- /dev/null
+++ b/doc/reference/field.adoc
@@ -0,0 +1,42 @@
+== `sqlite/field.hpp`
+
+A `field` is a type representing a <<value>> in a database. or as a result from a query.
+
+.Definition
+[source,cpp]
+----
+
+struct field
+{
+ typedef sqlite_int64 int64;
+
+ // The type of the value
+ value_type type() const;
+ // Is the held value null
+ bool is_null() const;
+ // Is the held value is not null
+ explicit operator bool () const;
+ // Returns the value as an `int64`.
+ int64 get_int() const;
+ // Returns the value as an `double`.
+ double get_double() const;
+ // Returns the value as text, i.e. a string_view. Note that this value may be invalidated
+ cstring_ref get_text() const;
+ // Returns the value as blob, i.e. raw memory. Note that this value may be invalidated
+ blob_view get_blob() const;
+ // Returns the field as a value.
+ value get_value() const;
+ // Returns the name of the column.
+ cstring_ref column_name() const;
+ // Returns the name of the table.
+ cstring_ref table_name() const;
+ // Returns the name of the original data source.
+ cstring_ref column_origin_name() const;
+}
+----
+
+NOTE: The view types can be invalidated when the database changes or the next row is read by the query.
+
+WARNING: The `field` type does not own the statement/query it was produced by. It is a merely a view into the `resultset`.
+Reading the next row will change the values returned.
+