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SQLite extension module for importing/exporting
database information from/to SQL source text and
export to CSV text.
Usage:
SQLite function:
SELECT import_sql(filename);
C function:
int impexp_import_sql(sqlite3 *db, char *filename);
Reads SQL commands from filename and executes them
against the current database. Returns the number
of changes to the current database.
SQLite function:
SELECT export_sql(filename, [mode, tablename, ...]);
C function:
int impexp_export_sql(sqlite3 *db, char *filename, int mode, ...);
Writes SQL to filename similar to SQLite's shell
".dump" meta command. Mode selects the output format:
Mode 0 (default): dump schema and data using the
optional table names following the mode argument.
Mode 1: dump data only using the optional table
names following the mode argument.
Mode 2: dump schema and data using the optional
table names following the mode argument; each
table name is followed by a WHERE clause, i.e.
"mode, table1, where1, table2, where2, ..."
Mode 3: dump data only, same rules as in mode 2.
Returns approximate number of lines written or
-1 when an error occurred.
Bit 1 of mode: when 1 dump data only
Bits 8..9 of mode: blob quoting mode
0 default
256 ORACLE
512 SQL Server
768 MySQL
SQLite function:
SELECT export_csv(filename, hdr, prefix1, tablename1, schema1, ...]);
C function:
int impexp_export_csv(sqlite3 *db, char *filename, int hdr, ...);
[char *prefix1, char *tablename1,
char *schema1, ...]
Writes entire tables as CSV to provided filename. A header
row is written when the hdr parameter is true. The
rows are optionally introduced with a column made up of
the prefix (non-empty string) for the respective table.
If "schema" is NULL, "sqlite_master" is used, otherwise
specify e.g. "sqlite_temp_master" for temporary tables or
"att.sqlite_master" for the attached database "att".
CREATE TABLE A(a,b);
INSERT INTO A VALUES(1,2);
INSERT INTO A VALUES(3,'foo');
CREATE TABLE B(c);
INSERT INTO B VALUES('hello');
SELECT export_csv('out.csv', 0, 'aa', 'A', NULL, 'bb', 'B', NULL);
-- CSV output
"aa",1,2
"aa",3,"foo"
"bb","hello"
SELECT export_csv('out.csv', 1, 'aa', 'A', NULL, 'bb', 'B', NULL);
-- CSV output
"aa","a","b"
"aa",1,2
"aa",3,"foo"
"bb","c"
"bb","hello"
SQLite function:
SELECT export_xml(filename, appendflag, indent,
[root, item, tablename, schema]+);
C function:
int impexp_export_xml(sqlite3 *db, char *filename,
int append, int indent, char *root,
char *item, char *tablename, char *schema);
Writes a table as simple XML to provided filename. The
rows are optionally enclosed with the "root" tag,
the row data is enclosed in "item" tags. If "schema"
is NULL, "sqlite_master" is used, otherwise specify
e.g. "sqlite_temp_master" for temporary tables or
"att.sqlite_master" for the attached database "att".
<item>
<columnname TYPE="INTEGER|REAL|NULL|TEXT|BLOB">value</columnname>
...
</item>
e.g.
CREATE TABLE A(a,b);
INSERT INTO A VALUES(1,2.1);
INSERT INTO A VALUES(3,'foo');
INSERT INTO A VALUES('',NULL);
INSERT INTO A VALUES(X'010203','<blob>');
SELECT export_xml('out.xml', 0, 2, 'TBL_A', 'ROW', 'A');
-- XML output
<TBL_A>
<ROW>
<a TYPE="INTEGER">1</a>
<b TYPE="REAL">2.1</b>
</ROW>
<ROW>
<a TYPE="INTEGER">3</a>
<b TYPE="TEXT">foo</b>
</ROW>
<ROW>
<a TYPE="TEXT"></a>
<b TYPE="NULL"></b>
</ROW>
<ROW>
<a TYPE="BLOB">&x03;</a>
<b TYPE="TEXT"><blob></b>
</ROW>
</TBL_A>
Quoting of XML entities is performed only on the data,
not on column names and root/item tags.
SQLite function:
SELECT export_json(filename, sql);
C function:
int impexp_export_json(sqlite3 *db, char *sql,
impexp_putc pfunc, void *parg);
Executes arbitrary SQL statements and formats
the result in JavaScript Object Notation (JSON).
The layout of the result is:
object {results, sql}
results[] object {columns, rows, changes, last_insert_rowid, error}
columns[]
object {name, decltype, type } (sqlite3_column_*)
rows[][] (sqlite3_column_*)
changes (sqlite3_changes)
last_insert_rowid (sqlite3_last_insert_rowid)
error (sqlite3_errmsg)
sql (SQL text)
For each single SQL statement in "sql" an object in the
"results" array is produced.
The function pointer for the output function to
"impexp_export_json" has a signature compatible
with fputc(3).
On Win32 the filename argument may be specified as NULL in order
to open a system file dialog for interactive filename selection.
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