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1 # 2006 January 31 | 1 # 2006 January 31 |
2 # | 2 # |
3 # The author disclaims copyright to this source code. In place of | 3 # The author disclaims copyright to this source code. In place of |
4 # a legal notice, here is a blessing: | 4 # a legal notice, here is a blessing: |
5 # | 5 # |
6 # May you do good and not evil. | 6 # May you do good and not evil. |
7 # May you find forgiveness for yourself and forgive others. | 7 # May you find forgiveness for yourself and forgive others. |
8 # May you share freely, never taking more than you give. | 8 # May you share freely, never taking more than you give. |
9 # | 9 # |
10 #*********************************************************************** | 10 #*********************************************************************** |
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192 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx | 192 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
193 WHERE apk=cx AND bpk=ax | 193 WHERE apk=cx AND bpk=ax |
194 } | 194 } |
195 } {tC {} tA * tB * tD *} | 195 } {tC {} tA * tB * tD *} |
196 do_test where3-2.5 { | 196 do_test where3-2.5 { |
197 queryplan { | 197 queryplan { |
198 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx | 198 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
199 WHERE cpk=ax AND bpk=cx | 199 WHERE cpk=ax AND bpk=cx |
200 } | 200 } |
201 } {tA {} tC * tB * tD *} | 201 } {tA {} tC * tB * tD *} |
202 do_test where3-2.5 { | 202 do_test where3-2.6 { |
203 queryplan { | 203 queryplan { |
204 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx | 204 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
205 WHERE bpk=cx AND apk=bx | 205 WHERE bpk=cx AND apk=bx |
206 } | 206 } |
207 } {tC {} tB * tA * tD *} | 207 } {tC {} tB * tA * tD *} |
208 do_test where3-2.6 { | 208 do_test where3-2.7 { |
209 queryplan { | 209 queryplan { |
210 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx | 210 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
211 WHERE cpk=bx AND apk=cx | 211 WHERE cpk=bx AND apk=cx |
212 } | 212 } |
213 } {tB {} tC * tA * tD *} | 213 } {tB {} tC * tA * tD *} |
214 | 214 |
| 215 # Ticket [13f033c865f878953] |
| 216 # If the outer loop must be a full table scan, do not let ANALYZE trick |
| 217 # the planner into use a table for the outer loop that might be indexable |
| 218 # if held until an inner loop. |
| 219 # |
| 220 do_test where3-3.0 { |
| 221 execsql { |
| 222 CREATE TABLE t301(a INTEGER PRIMARY KEY,b,c); |
| 223 CREATE INDEX t301c ON t301(c); |
| 224 INSERT INTO t301 VALUES(1,2,3); |
| 225 CREATE TABLE t302(x, y); |
| 226 ANALYZE; |
| 227 explain query plan |
| 228 SELECT * FROM t302, t301 WHERE t302.x=5 AND t301.a=t302.y; |
| 229 } |
| 230 } {0 0 {TABLE t302} 1 1 {TABLE t301 USING PRIMARY KEY}} |
| 231 do_test where3-3.1 { |
| 232 execsql { |
| 233 explain query plan |
| 234 SELECT * FROM t301, t302 WHERE t302.x=5 AND t301.a=t302.y; |
| 235 } |
| 236 } {0 1 {TABLE t302} 1 0 {TABLE t301 USING PRIMARY KEY}} |
| 237 |
| 238 # Verify that when there are multiple tables in a join which must be |
| 239 # full table scans that the query planner attempts put the table with |
| 240 # the fewest number of output rows as the outer loop. |
| 241 # |
| 242 do_test where3-4.0 { |
| 243 execsql { |
| 244 CREATE TABLE t400(a INTEGER PRIMARY KEY, b, c); |
| 245 CREATE TABLE t401(p INTEGER PRIMARY KEY, q, r); |
| 246 CREATE TABLE t402(x INTEGER PRIMARY KEY, y, z); |
| 247 EXPLAIN QUERY PLAN |
| 248 SELECT * FROM t400, t401, t402 WHERE t402.z GLOB 'abc*'; |
| 249 } |
| 250 } {0 2 {TABLE t402} 1 0 {TABLE t400} 2 1 {TABLE t401}} |
| 251 do_test where3-4.1 { |
| 252 execsql { |
| 253 EXPLAIN QUERY PLAN |
| 254 SELECT * FROM t400, t401, t402 WHERE t401.r GLOB 'abc*'; |
| 255 } |
| 256 } {0 1 {TABLE t401} 1 0 {TABLE t400} 2 2 {TABLE t402}} |
| 257 do_test where3-4.2 { |
| 258 execsql { |
| 259 EXPLAIN QUERY PLAN |
| 260 SELECT * FROM t400, t401, t402 WHERE t400.c GLOB 'abc*'; |
| 261 } |
| 262 } {0 0 {TABLE t400} 1 1 {TABLE t401} 2 2 {TABLE t402}} |
| 263 |
| 264 # Verify that a performance regression encountered by firefox |
| 265 # has been fixed. |
| 266 # |
| 267 do_test where3-5.0 { |
| 268 execsql { |
| 269 CREATE TABLE aaa (id INTEGER PRIMARY KEY, type INTEGER, |
| 270 fk INTEGER DEFAULT NULL, parent INTEGER, |
| 271 position INTEGER, title LONGVARCHAR, |
| 272 keyword_id INTEGER, folder_type TEXT, |
| 273 dateAdded INTEGER, lastModified INTEGER); |
| 274 CREATE INDEX aaa_111 ON aaa (fk, type); |
| 275 CREATE INDEX aaa_222 ON aaa (parent, position); |
| 276 CREATE INDEX aaa_333 ON aaa (fk, lastModified); |
| 277 CREATE TABLE bbb (id INTEGER PRIMARY KEY, type INTEGER, |
| 278 fk INTEGER DEFAULT NULL, parent INTEGER, |
| 279 position INTEGER, title LONGVARCHAR, |
| 280 keyword_id INTEGER, folder_type TEXT, |
| 281 dateAdded INTEGER, lastModified INTEGER); |
| 282 CREATE INDEX bbb_111 ON bbb (fk, type); |
| 283 CREATE INDEX bbb_222 ON bbb (parent, position); |
| 284 CREATE INDEX bbb_333 ON bbb (fk, lastModified); |
| 285 } |
| 286 |
| 287 execsql { |
| 288 EXPLAIN QUERY PLAN |
| 289 SELECT bbb.title AS tag_title |
| 290 FROM aaa JOIN bbb ON bbb.id = aaa.parent |
| 291 WHERE aaa.fk = 'constant' |
| 292 AND LENGTH(bbb.title) > 0 |
| 293 AND bbb.parent = 4 |
| 294 ORDER BY bbb.title COLLATE NOCASE ASC; |
| 295 } |
| 296 } {0 0 {TABLE aaa WITH INDEX aaa_333} 1 1 {TABLE bbb USING PRIMARY KEY}} |
| 297 do_test where3-5.1 { |
| 298 execsql { |
| 299 EXPLAIN QUERY PLAN |
| 300 SELECT bbb.title AS tag_title |
| 301 FROM aaa JOIN aaa AS bbb ON bbb.id = aaa.parent |
| 302 WHERE aaa.fk = 'constant' |
| 303 AND LENGTH(bbb.title) > 0 |
| 304 AND bbb.parent = 4 |
| 305 ORDER BY bbb.title COLLATE NOCASE ASC; |
| 306 } |
| 307 } {0 0 {TABLE aaa WITH INDEX aaa_333} 1 1 {TABLE aaa AS bbb USING PRIMARY KEY}} |
| 308 do_test where3-5.2 { |
| 309 execsql { |
| 310 EXPLAIN QUERY PLAN |
| 311 SELECT bbb.title AS tag_title |
| 312 FROM bbb JOIN aaa ON bbb.id = aaa.parent |
| 313 WHERE aaa.fk = 'constant' |
| 314 AND LENGTH(bbb.title) > 0 |
| 315 AND bbb.parent = 4 |
| 316 ORDER BY bbb.title COLLATE NOCASE ASC; |
| 317 } |
| 318 } {0 1 {TABLE aaa WITH INDEX aaa_333} 1 0 {TABLE bbb USING PRIMARY KEY}} |
| 319 do_test where3-5.3 { |
| 320 execsql { |
| 321 EXPLAIN QUERY PLAN |
| 322 SELECT bbb.title AS tag_title |
| 323 FROM aaa AS bbb JOIN aaa ON bbb.id = aaa.parent |
| 324 WHERE aaa.fk = 'constant' |
| 325 AND LENGTH(bbb.title) > 0 |
| 326 AND bbb.parent = 4 |
| 327 ORDER BY bbb.title COLLATE NOCASE ASC; |
| 328 } |
| 329 } {0 1 {TABLE aaa WITH INDEX aaa_333} 1 0 {TABLE aaa AS bbb USING PRIMARY KEY}} |
| 330 |
215 | 331 |
216 finish_test | 332 finish_test |
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