Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.1k views
in Technique[技术] by (71.8m points)

database - List of PHP native_type's for PDO getColumnMeta()

I am using the PDO Database Abstraction library to make sure my code is portable. However, I now find that I need column information so I turned to the PDOStatement->getColumnMeta() method hoping it would be somewhat standardized - but from what I have found it actually seems open-ended.

For example, when calling that method from SQLite it seems you get one set of possible values:

http://gcov.php.net/PHP_5_3/lcov_html/pdo_sqlite/sqlite_statement.c.gcov.php

null
double
blob
string
integer
...

While a call from the MySQL database lists all kinds of other weird values: http://gcov.php.net/PHP_5_3/lcov_html/pdo_mysql/mysql_statement.c.gcov.php

var_string
longlong
newdecimal
geometry
...

I may be looking in the wrong place also, but I just can't find any useful data on what "native_type" values can be when it comes to switching around databases.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

PDO is not a database abstraction. It is "only" an unified access layer. If you switch to another database system you most likely have to change the code. Each (specific) database driver returns its own set of values and there's no "translation layer" for the driver:decl_type info in pdo beyond the native_type/pdo_type fields in the result of getColumnMeta()


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...