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Implement parser hooks for processing ColumnRef and ParamRef nodes, as per my

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recent proposal.  As proof of concept, remove knowledge of Params from the
core parser, arranging for them to be handled entirely by parser hook
functions.  It turns out we need an additional hook for that --- I had
forgotten about the code that handles inferring a parameter's type from
context.

This is a preliminary step towards letting plpgsql handle its variables
through parser hooks.  Additional work remains to be done to expose the
facility through SPI, but I think this is all the changes needed in the core
parser.
This commit is contained in:
Tom Lane
2009-10-31 01:41:31 +00:00
parent 8442317beb
commit fb5d05805b
15 changed files with 944 additions and 520 deletions
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9
src/backend/parser/parse_node.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_node.c,v 1.105 2009/06/11 14:49:00 momjian Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_node.c,v 1.106 2009/10/31 01:41:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -53,7 +53,12 @@ make_parsestate(ParseState *parentParseState)
if (parentParseState)
{
pstate->p_sourcetext = parentParseState->p_sourcetext;
pstate->p_variableparams = parentParseState->p_variableparams;
/* all hooks are copied from parent */
pstate->p_pre_columnref_hook = parentParseState->p_pre_columnref_hook;
pstate->p_post_columnref_hook = parentParseState->p_post_columnref_hook;
pstate->p_paramref_hook = parentParseState->p_paramref_hook;
pstate->p_coerce_param_hook = parentParseState->p_coerce_param_hook;
pstate->p_ref_hook_state = parentParseState->p_ref_hook_state;
}
return pstate;