How does Google map store images using Oracle?

Google maps are queried based on Oracle. How does Google store maps in Oracle?

Here we use the dbms_lob package to briefly understand the process.

1) create a t table:

1. 00:32:04 hr @ ORCL (^ ω ^)Create TableT (a varchar2 (20), B blob );
3. The table has been created.

2) Write a stored procedure:

1. CREATE OR REPLACE PROCEDUREThink (p_1 VARCHAR2, p_2 VARCHAR2, p_3 varchar2)
2. AS
3. V_f BFILE;
4. V_ B blob;
5. BEGIN
6. INSERT INTOTValues(P_1, EMPTY_BLOB ())RETURNBIntoV_ B;
9. V_f: = BFILENAME (p_2, p_3 );
10. DBMS_LOB.FILEOPEN (v_f, DBMS_LOB.FILE_READONLY );
11. DBMS_LOB.LOADFROMFILE (v_ B, v_f, DBMS_LOB.GETLENGTH (v_f ));
12. DBMS_LOB.FILECLOSE (v_f );
13. Commit;
14. End;

Check whether our process is correct: select * from user_errors

3) The sys user creates a directory object and authorizes:

1. 00:44:12 sys @ ORCL (^ ω ^)CreateDirectory dirAs 'C: \ Users \ Administrator \';
3. The directory has been created.
5. 00:45:21 sys @ ORCL (^ ω ^)Grant All OnDirectory dirToHr;

4) execute the Stored Procedure

1. Begin
2. Think ('This is my pic 1','Dir','Psu.jpg');
3. End;

5) query (based on pl/SQL query)

Select*FromT

The query results are as follows:

Of course, Google cannot use pl/SQL to show its images. It may be an app developed by java or another app.