diff options
Diffstat (limited to 'src/backend/nodes/queryjumblefuncs.c')
| -rw-r--r-- | src/backend/nodes/queryjumblefuncs.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/backend/nodes/queryjumblefuncs.c b/src/backend/nodes/queryjumblefuncs.c index be823a7f8fa..de29d51c631 100644 --- a/src/backend/nodes/queryjumblefuncs.c +++ b/src/backend/nodes/queryjumblefuncs.c @@ -141,6 +141,33 @@ JumbleQuery(Query *query) return jstate; } +JumbleState * +JumbleExpr(Expr *expr, uint64 *exprId) +{ + JumbleState *jstate = NULL; + + Assert(exprId != NULL); + + jstate = (JumbleState *) palloc(sizeof(JumbleState)); + + /* Set up workspace for query jumbling */ + jstate->jumble = (unsigned char *) palloc(JUMBLE_SIZE); + jstate->jumble_len = 0; + jstate->clocations_buf_size = 32; + jstate->clocations = (LocationLen *) + palloc(jstate->clocations_buf_size * sizeof(LocationLen)); + jstate->clocations_count = 0; + jstate->highest_extern_param_id = 0; + + /* Compute query ID */ + _jumbleNode(jstate, (Node *) expr); + *exprId = DatumGetUInt64(hash_any_extended(jstate->jumble, + jstate->jumble_len, + 0)); + + return jstate; +} + /* * Enables query identifier computation. * |