Advanced Oracle Pl/Sql: Programming With Packages (Nutshell Handbook)

The PLVlex (PL/Vision LEXical analysis) package provides generic string-parsing extensions to PL/SQL; these extensions include an awareness of the syntax and delimiters of the PL/SQL language. See the companion disk for details.

5.16.1 Analyzing PL/SQL string content

FUNCTION is_delimiter

(character_in IN VARCHAR2, exclude_in IN VARCHAR2 := NULL)

RETURN BOOLEAN;

Returns TRUE if the string is a PL/SQL delimiter.

FUNCTION is_oneline_comment (token_in IN VARCHAR2) RETURN BOOLEAN;

Returns TRUE if the string is a single-line comment indicator (a double hyphen).

FUNCTION starts_multiline_comment (token_in IN VARCHAR2)

RETURN BOOLEAN;

Returns TRUE if the string is equal to /*, which signals the start of a multiline or block comment.

FUNCTION ends_multiline_comment (token_in IN VARCHAR2)

RETURN BOOLEAN;

Returns TRUE if the string is equal to */, which signals the end of a multiline or block comment.

5.16.2 Scanning PL/SQL strings

FUNCTION next_atom_loc

(string_in IN VARCHAR2, start_loc_in IN NUMBER)

RETURN NUMBER;

Returns the location of the beginning of the next PL/SQL atomic in the string.

PROCEDURE get_next_atomic

(line_in IN VARCHAR2,

start_pos_in IN VARCHAR2,

atomic_out OUT VARCHAR2,

new_start_pos_out OUT INTEGER,

line_len_in IN INTEGER := NULL);

Gets the next PL/SQL atomic from the string. This procedure builds upon PLVlex.next_atom_loc and several low-level PLVprs functions to scan the string from the perspective of a line of PL/SQL source code.

PROCEDURE get_next_token

(line_in IN VARCHAR2,

start_pos_in IN VARCHAR2,

token_out IN OUT VARCHAR2,

new_start_pos_out IN OUT INTEGER,

skip_spaces_in IN BOOLEAN,

line_len_in IN INTEGER := NULL,

full_qualified_name_in IN BOOLEAN := FALSE);

Gets the next PL/SQL token (which could be composed of multiple atomics) from the string.

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