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MXS-1247 Add initial support for window functions

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This commit will be followed by more tests.
This commit is contained in:
Johan Wikman
2017-08-16 12:33:47 +03:00
parent 27ef5c3048
commit 523e7ed445
6 changed files with 2007 additions and 6 deletions
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78
query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
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@ -1028,8 +1028,28 @@ multiselect_op(A) ::= UNION ALL. {A = TK_ALL;}
multiselect_op(A) ::= EXCEPT|INTERSECT(OP). {A = @OP;}
%endif SQLITE_OMIT_COMPOUND_SELECT
%ifdef MAXSCALE
wf_window_name ::= id.
wf_window_ref_opt ::= .
wf_window_ref_opt ::= id.
wf_window_spec ::= LP wf_window_ref_opt wf_partition_by_opt wf_order_by_opt wf_frame_opt RP.
wf_window_def ::= wf_window_name AS wf_window_spec.
wf_window_def_list ::= wf_window_def_list COMMA wf_window_def.
wf_window_def_list ::= wf_window_def.
wf_window ::= WINDOW wf_window_def_list.
wf_window ::= WINDOW LP RP.
wf_window_opt ::= .
wf_window_opt ::= wf_window.
oneselect(A) ::= SELECT select_options(D) selcollist(W) select_into_opt(I1) from(X) where_opt(Y)
groupby_opt(P) having_opt(Q) orderby_opt(Z) limit_opt(L) select_into_opt(I2). {
groupby_opt(P) having_opt(Q) wf_window_opt orderby_opt(Z) limit_opt(L)
select_into_opt(I2). {
if (!I1) {
I1=I2;
}
@ -1882,6 +1902,62 @@ func_arg_tail_opt ::= .
func_arg_tail_opt ::= group_concat_tail.
func_arg_tail_opt ::= convert_tail.
wf_partition_by ::= PARTITION BY nexprlist(X). {
sqlite3ExprListDelete(pParse->db, X);
}
wf_partition_by_opt ::= .
wf_partition_by_opt ::= wf_partition_by.
wf_order_by ::= ORDER BY nexprlist(X) sortorder. {
sqlite3ExprListDelete(pParse->db, X);
}
wf_order_by_opt ::= .
wf_order_by_opt ::= wf_order_by.
wf_frame_units ::= RANGE.
wf_frame_units ::= ROWS.
wf_frame_start ::= UNBOUNDED PRECEDING.
wf_frame_start ::= CURRENT ROW.
wf_frame_start ::= term PRECEDING.
wf_frame_bound ::= wf_frame_start.
wf_frame_bound ::= UNBOUNDED FOLLOWING.
wf_frame_bound ::= term FOLLOWING.
wf_frame_extent ::= wf_frame_start.
wf_frame_extent ::= BETWEEN wf_frame_bound AND wf_frame_bound.
wf_frame_exclusion_opt ::= .
wf_frame_exclusion_opt ::= EXCLUDE CURRENT ROW.
wf_frame_exclusion_opt ::= EXCLUDE GROUP.
wf_frame_exclusion_opt ::= EXCLUDE TIES.
wf_frame_exclusion_opt ::= EXCLUDE NO OTHERS.
wf_frame_opt ::= .
wf_frame_opt ::= wf_frame_units wf_frame_extent wf_frame_exclusion_opt .
wf ::= OVER LP wf_window_ref_opt wf_partition_by_opt wf_order_by_opt wf_frame_opt RP.
wf ::= OVER id.
expr(A) ::= id(X) LP distinct(D) exprlist(Y) func_arg_tail_opt RP(E) wf. {
if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X);
}
A.pExpr = sqlite3ExprFunction(pParse, Y, &X);
spanSet(&A,&X,&E);
if( D==SF_Distinct && A.pExpr ){
A.pExpr->flags |= EP_Distinct;
}
}
expr(A) ::= id(X) LP STAR RP(E) wf. {
A.pExpr = sqlite3ExprFunction(pParse, 0, &X);
spanSet(&A,&X,&E);
}
expr(A) ::= id(X) LP distinct(D) exprlist(Y) func_arg_tail_opt RP(E). {
%endif
%ifndef MAXSCALE