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13  <pre>/**
14 *  call-seq:
15 *  substitution(variable,value,(precision),(scale))
16 *
17 *  Defines a substitution variable.  The value may be a string, integer or
18 *  decimal.  If it is a decimal then the precision and scale may be
19 *  specified. */
20static VALUE sqlrcur_substitution(int argc, VALUE *argv, VALUE self) {
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