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public interface Statement
The Statement interface provides a way of giving a statement to the language module, preparing the statement, and executing it. It also provides some support for stored statements. Simple, non-stored, non-parameterized statements can be executed with the execute() method. Parameterized statements must use prepare(). To get the stored query plan for a statement, use get().
This interface will have different implementations for the execution-only and compile-and-execute versions of the product. In the execution-only version, some of the methods will do nothing but raise exceptions to indicate that they are not implemented.
There is a Statement factory in the Connection interface in the Database module, which uses the one provided in LanguageFactory.
Method Summary | |
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java.lang.String |
getSource()
Return the SQL string that this statement is for. |
PreparedStatement |
prepare(LanguageConnectionContext lcc)
Generates an execution plan without executing it. |
PreparedStatement |
prepare(LanguageConnectionContext lcc,
boolean allowInternalSyntax)
Generates an execution plan without executing it. |
PreparedStatement |
prepareStorable(LanguageConnectionContext lcc,
PreparedStatement ps,
java.lang.Object[] paramDefaults,
SchemaDescriptor spsSchema,
boolean internalSQL)
Generates an execution plan given a set of named parameters. |
Method Detail |
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PreparedStatement prepare(LanguageConnectionContext lcc) throws StandardException
StandardException
- Thrown if this is an
execution-only version of the module (the prepare() method
relies on compilation).PreparedStatement prepare(LanguageConnectionContext lcc, boolean allowInternalSyntax) throws StandardException
lcc
- the language connection contextallowInternalSyntax
- If this statement is for a metadata call then
we will allow internal sql syntax on such statement. This internal
sql syntax is not available to a user sql statement.
StandardException
- Thrown if this is an
execution-only version of the module (the prepare() method
relies on compilation).PreparedStatement prepareStorable(LanguageConnectionContext lcc, PreparedStatement ps, java.lang.Object[] paramDefaults, SchemaDescriptor spsSchema, boolean internalSQL) throws StandardException
lcc
- Compiler state variable.ps
- Prepared statementparamDefaults
- Default parameter values to use for
optimizationspsSchema
- schema of the stored prepared statement
StandardException
- Thrown if this is an
execution-only version of the module (the prepare() method
relies on compilation).java.lang.String getSource()
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