1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
|
do $$
declare
c int;
strval varchar;
intval int;
nrows int default 30;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'select ''ahoj'' || i, i from generate_series(1, :nrows) g(i)');
call dbms_sql.bind_variable(c, 'nrows', nrows);
call dbms_sql.define_column(c, 1, strval);
call dbms_sql.define_column(c, 2, intval);
perform dbms_sql.execute(c);
while dbms_sql.fetch_rows(c) > 0
loop
call dbms_sql.column_value(c, 1, strval);
call dbms_sql.column_value(c, 2, intval);
raise notice 'c1: %, c2: %', strval, intval;
end loop;
call dbms_sql.close_cursor(c);
end;
$$;
do $$
declare
c int;
strval varchar;
intval int;
nrows int default 30;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'select ''ahoj'' || i, i from generate_series(1, :nrows) g(i)');
call dbms_sql.bind_variable(c, 'nrows', nrows);
call dbms_sql.define_column(c, 1, strval);
call dbms_sql.define_column(c, 2, intval);
perform dbms_sql.execute(c);
while dbms_sql.fetch_rows(c) > 0
loop
strval := dbms_sql.column_value_f(c, 1, strval);
intval := dbms_sql.column_value_f(c, 2, intval);
raise notice 'c1: %, c2: %', strval, intval;
end loop;
call dbms_sql.close_cursor(c);
end;
$$;
drop table if exists foo;
create table foo(a int, b varchar, c numeric);
do $$
declare c int;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'insert into foo values(:a, :b, :c)');
for i in 1..100
loop
call dbms_sql.bind_variable(c, 'a', i);
call dbms_sql.bind_variable(c, 'b', 'Ahoj ' || i);
call dbms_sql.bind_variable(c, 'c', i + 0.033);
perform dbms_sql.execute(c);
end loop;
end;
$$;
select * from foo;
truncate foo;
do $$
declare c int;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'insert into foo values(:a, :b, :c)');
for i in 1..100
loop
perform dbms_sql.bind_variable_f(c, 'a', i);
perform dbms_sql.bind_variable_f(c, 'b', 'Ahoj ' || i);
perform dbms_sql.bind_variable_f(c, 'c', i + 0.033);
perform dbms_sql.execute(c);
end loop;
end;
$$;
select * from foo;
truncate foo;
do $$
declare
c int;
a int[];
b varchar[];
ca numeric[];
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'insert into foo values(:a, :b, :c)');
a := ARRAY[1, 2, 3, 4, 5];
b := ARRAY['Ahoj', 'Nazdar', 'Bazar'];
ca := ARRAY[3.14, 2.22, 3.8, 4];
call dbms_sql.bind_array(c, 'a', a);
call dbms_sql.bind_array(c, 'b', b);
call dbms_sql.bind_array(c, 'c', ca);
raise notice 'inserted rows %d', dbms_sql.execute(c);
end;
$$;
select * from foo;
truncate foo;
-- should not to crash, when bound array is null
do $$
declare
c int;
ca numeric[];
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'insert into foo values(:a, 10, 20)');
call dbms_sql.bind_array(c, 'a', ca);
raise notice 'inserted rows %d', dbms_sql.execute(c);
end;
$$;
-- should not to crash, when we try to touch result without execute
do $$
declare
c int;
a int[];
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'select i from generate_series(1, 2) g(i)');
call dbms_sql.define_array(c, 1, a, 10, 1);
call dbms_sql.column_value(c, 1, a);
call dbms_sql.close_cursor(c);
end;
$$;
-- should not to crash, when the variable is overwritten
DO $$
declare
c integer;
n integer;
c2 numeric;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'INSERT INTO foo(a) VALUES (:bnd2)');
call dbms_sql.bind_variable(c, 'bnd2', c2);
call dbms_sql.bind_variable(c, 'bnd2', c2);
n := dbms_sql.execute(c);
end
$$;
-- should not to crash, when we try to read column without data
do $$
declare
c int;
strval varchar;
intval int;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'select ''foo'', 1');
call dbms_sql.define_column(c, 1, strval);
call dbms_sql.define_column(c, 2, intval);
perform dbms_sql.execute(c);
while dbms_sql.fetch_rows(c) > -1
loop
call dbms_sql.column_value(c, 1, strval);
end loop;
call dbms_sql.close_cursor(c);
end;
$$;
select * from foo;
truncate foo;
do $$
declare
c int;
a int[];
b varchar[];
ca numeric[];
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'insert into foo values(:a, :b, :c)');
a := ARRAY[1, 2, 3, 4, 5];
b := ARRAY['Ahoj', 'Nazdar', 'Bazar'];
ca := ARRAY[3.14, 2.22, 3.8, 4];
call dbms_sql.bind_array(c, 'a', a, 2, 3);
call dbms_sql.bind_array(c, 'b', b, 3, 4);
call dbms_sql.bind_array(c, 'c', ca);
raise notice 'inserted rows %d', dbms_sql.execute(c);
end;
$$;
select * from foo;
truncate foo;
do $$
declare
c int;
a int[];
b varchar[];
ca numeric[];
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'select i, ''Ahoj'' || i, i + 0.003 from generate_series(1, 35) g(i)');
call dbms_sql.define_array(c, 1, a, 10, 1);
call dbms_sql.define_array(c, 2, b, 10, 1);
call dbms_sql.define_array(c, 3, ca, 10, 1);
perform dbms_sql.execute(c);
while dbms_sql.fetch_rows(c) > 0
loop
call dbms_sql.column_value(c, 1, a);
call dbms_sql.column_value(c, 2, b);
call dbms_sql.column_value(c, 3, ca);
raise notice 'a = %', a;
raise notice 'b = %', b;
raise notice 'c = %', ca;
end loop;
call dbms_sql.close_cursor(c);
end;
$$;
drop table foo;
create table tab1(c1 integer, c2 numeric);
create or replace procedure single_Row_insert(c1 integer, c2 numeric)
as $$
declare
c integer;
n integer;
begin
c := dbms_sql.open_cursor();
call dbms_sql.parse(c, 'INSERT INTO tab1 VALUES (:bnd1, :bnd2)');
call dbms_sql.bind_variable(c, 'bnd1', c1);
call dbms_sql.bind_variable(c, 'bnd2', c2);
n := dbms_sql.execute(c);
call dbms_sql.debug_cursor(c);
call dbms_sql.close_cursor(c);
end
$$language plpgsql;
do $$
declare a numeric(7,2);
begin
call single_Row_insert(2,a);
end
$$;
select * from tab1;
do $$
declare a numeric(7,2) default 1.23;
begin
call single_Row_insert(2,a);
end
$$;
select * from tab1;
select * from tab1 where c2 is null;
do $$
declare a numeric(7,2);
begin
call single_Row_insert(0,a); -- single_Row_insert(0, null)
end
$$;
select * from tab1;
do $$
declare a numeric(7,2) default 1.23;
begin
call single_Row_insert(0,a); -- single_Row_insert(0, 1.23)
end
$$;
select * from tab1;
drop procedure single_Row_insert;
drop table tab1;
create table test(id text);
insert into test(id) values ('1'), (null);
-- should not to crash
do $$
declare
cursor int;
id text;
row_counter int := 0;
begin
cursor := dbms_sql.open_cursor();
call dbms_sql.parse(cursor, 'select id from test');
call dbms_sql.define_column(cursor, 1, 'id');
perform dbms_sql.execute(cursor);
while dbms_sql.fetch_rows(cursor) > 0 loop
row_counter = row_counter + 1;
raise notice 'process row #%', row_counter;
call dbms_sql.column_value(cursor, 1, id);
raise notice 'row id: `%`', id;
end loop;
call dbms_sql.close_cursor(cursor);
end;
$$;
drop table test;
|
