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Finished the Between patch Christopher started.

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Implements between (symmetric / asymmetric) as a node.

Executes the left or right expression once, makes a Const out of the
resulting Datum and executes the >=, <= portions out of the Const sets.

Of course, the parser does a fair amount of preparatory work for this to
happen.

Rod Taylor
This commit is contained in:
Bruce Momjian
2002-07-18 04:41:46 +00:00
parent 7ea5f1d7f1
commit 3e22406ec6
15 changed files with 619 additions and 35 deletions
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51
src/backend/nodes/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.124 2002/07/04 15:23:54 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.125 2002/07/18 04:41:45 momjian Exp $
*
* NOTES
* Most of the read functions for plan nodes are tested. (In fact, they
@ -881,6 +881,53 @@ _readCaseWhen(void)
return local_node;
}
static BetweenExpr *
_readBetweenExpr(void)
{
BetweenExpr *local_node;
char *token;
int length;
local_node = makeNode(BetweenExpr);
token = pg_strtok(&length); /* eat :expr */
local_node->expr = nodeRead(true);
token = pg_strtok(&length); /* eat :not */
token = pg_strtok(&length); /* get not */
local_node->not = strtobool(token);
token = pg_strtok(&length); /* eat :symmetric */
token = pg_strtok(&length); /* get symmetric */
local_node->symmetric = strtobool(token);
token = pg_strtok(&length); /* eat :lexpr */
local_node->lexpr = nodeRead(true);
token = pg_strtok(&length); /* eat :rexpr */
local_node->rexpr = nodeRead(true);
token = pg_strtok(&length); /* eat :gthan */
local_node->gthan = nodeRead(true);
token = pg_strtok(&length); /* eat :lthan */
local_node->lthan = nodeRead(true);
token = pg_strtok(&length); /* eat :typeid */
token = pg_strtok(&length); /* get typeid */
local_node->typeId = atooid(token);
token = pg_strtok(&length); /* eat :typelen */
token = pg_strtok(&length); /* get typelen */
local_node->typeLen = atoui(token);
token = pg_strtok(&length); /* eat :typebyval */
token = pg_strtok(&length); /* get typebyval */
local_node->typeByVal = strtobool(token);
return local_node;
}
/* ----------------
* _readNullTest
*
@ -2132,6 +2179,8 @@ parsePlanString(void)
return_value = _readNullTest();
else if (length == 11 && strncmp(token, "BOOLEANTEST", length) == 0)
return_value = _readBooleanTest();
else if (length == 11 && strncmp(token, "BETWEENEXPR", length) == 0)
return_value = _readBetweenExpr();
else
elog(ERROR, "badly formatted planstring \"%.10s\"...", token);