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Tom Lane authored
Generally, the parse location assigned to a multiple-token construct is the location of its leftmost token. This commit breaks that rule for the syntaxes TYPENAME 'LITERAL' and CAST(CONSTANT AS TYPENAME) --- the resulting Const will have the location of the literal string, not the typename or CAST keyword. The cases where this matters are pretty thin on the ground (no error messages in the regression tests change, for example), and it's unlikely that any user would be confused anyway by an error cursor pointing at the literal. But still it's less than consistent. The reason for changing it is that contrib/pg_stat_statements wants to know the parse location of the original literal, and it was agreed that this is the least unpleasant way to preserve that information through parse analysis. Peter Geoghegan
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