tdbc::tokenize - TDBC SQL tokenizer
package require tdbc 1.0
As a convenience to database drivers, Tcl Database Connectivity (TDBC) provides
a command to break SQL code apart into tokens so that bound variables can
readily be identified and substituted.
command accepts as its parameter a string that is
expected to contain one or more SQL statements. It returns a list of
substrings; concatenating these substrings together will yield the original
string. Each substring is one of the following:
- A bound variable, which begins with one of the characters ' :',
'@', or '$'. The remainder of the string is the variable
name and will consist of alphanumeric characters and underscores. (The
leading character will be be non-numeric.)
- A semicolon that separates two SQL statements.
- Something else in a SQL statement. The tokenizer does not attempt to parse
SQL; it merely identifies bound variables (distinguishing them from
similar strings appearing inside quotes or comments) and statement
tdbc(n), tdbc::connection(n), tdbc::statement(n), tdbc::resultset(n)
TDBC, SQL, database, tokenize
Copyright (c) 2008 by Kevin B. Kenny.