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Parameter types
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
Bind values or bind parameters come in different flavours in different SQL databases. JDBC standardises on their syntax by allowing only ?
(question mark) characters as placeholders for bind variables. Thus, jOOQ, by default, generates ?
placeholders for JDBC consumptions. Users who wish to use jOOQ with a different backend than JDBC can specify that all jOOQ bind values, including indexed parameters and named parameters generate alternative strings, other than ?
.
These are the current options:
-
INDEXED
(the default): Generates indexed parameter placeholders using?
. -
NAMED
: Generates named parameter placeholders, such as:param
for parameters that are named explicitly or:1
for unnamed, indexed parameters. -
NAMED_OR_INLINED:
Generates named parameter placeholders for parameters that are named explicitly and inlines all unnamed parameters. -
INLINED
: Inlines all parameters.
An example:
-- INDEXED SELECT FIRST_NAME || ? FROM AUTHOR WHERE ID = ? -- NAMED SELECT FIRST_NAME || :1 FROM AUTHOR WHERE ID = :x -- NAMED_OR_INLINED SELECT FIRST_NAME || 'x' FROM AUTHOR WHERE ID = :x -- INLINED SELECT FIRST_NAME || 'x' FROM AUTHOR WHERE ID = 42
Param<String> x = val("x"); Param<Integer> i = param("x", 42); DSL.using(configuration) .select(FIRST_NAME.concat(x)) .from(AUTHOR) .where(ID.eq(i)) .fetch();
Example configuration
Settings settings = new Settings() .withParamType(ParamType.NAMED); // Defaults to INDEXED
The following setting statementType may override this setting.
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