About CTX_DOC Package Procedures

Many of the CTX_DOC PL/SQL package procedures exist in two versions: those that make use of indexes, and those that do not. Those that do not make use of indexes are called “policy-based” procedures. They are offered because there are times when you may want to use document services on a single document without creating a CONTEXT index in advance. Policy-based procedures enable you to do this.

The policy_* procedures mirror the conventional in-memory document services and are used with policy_name replacing index_ name, and document of type VARCHAR2, CLOB, BLOB, or BFILE replacing textkey. Thus, you need not create an index to obtain document services output with these procedures.

For the procedures that generate character offsets and lengths, such as HIGHLIGHT and TOKENS, Oracle Text follows USC-2 codepoint semantics.

Note: The APIs in the CTX_DOC package do not support identifiers that are prefixed with the schema or the owner name.