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[#1595] Simulate REPEAT() in SQLite

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This commit is contained in:
Lukas Eder 2012-07-19 22:15:29 +02:00
parent 12e6e295c6
commit cc9d960ae1
3 changed files with 14 additions and 5 deletions
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1
jOOQ-test/src/org/jooq/test/_/testcases/FunctionTests.java
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@ -528,7 +528,6 @@ extends BaseTest<A, AP, B, S, B2S, BS, L, X, DATE, BOOL, D, T, U, I, IPK, T658,
// REPEAT
switch (getDialect()) {
case DERBY:
case SQLITE:
log.info("SKIPPING", "REPEAT function");
break;

11
jOOQ/src/main/java/org/jooq/impl/Factory.java
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@ -2769,7 +2769,7 @@ public class Factory implements FactoryOperations {
*
* @see #repeat(Field, Field)
*/
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLSERVER, SYBASE })
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLITE, SQLSERVER, SYBASE })
public static Field<String> repeat(String field, int count) {
return repeat(val(field, String.class), val(count));
}
@ -2779,7 +2779,7 @@ public class Factory implements FactoryOperations {
*
* @see #repeat(Field, Field)
*/
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLSERVER, SYBASE })
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLITE, SQLSERVER, SYBASE })
public static Field<String> repeat(String field, Field<? extends Number> count) {
return repeat(val(field, String.class), nullSafe(count));
}
@ -2789,7 +2789,7 @@ public class Factory implements FactoryOperations {
*
* @see #repeat(Field, Field)
*/
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLSERVER, SYBASE })
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLITE, SQLSERVER, SYBASE })
public static Field<String> repeat(Field<String> field, int count) {
return repeat(nullSafe(field), val(count));
}
@ -2803,8 +2803,11 @@ public class Factory implements FactoryOperations {
* using rpad and length, which may be simulated as well, depending on the
* RDBMS:
* <code><pre>rpad([field], length([field]) * [count], [field])</pre></code>
* <p>
* In {@link SQLDialect#SQLITE}, this is simulated as such:
* <code><pre>replace(substr(quote(zeroblob(([count] + 1) / 2)), 3, [count]), '0', [field])</pre></code>
*/
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLSERVER, SYBASE })
@Support({ ASE, CUBRID, DB2, H2, HSQLDB, INGRES, MYSQL, ORACLE, POSTGRES, SQLITE, SQLSERVER, SYBASE })
public static Field<String> repeat(Field<String> field, Field<? extends Number> count) {
return new Repeat(nullSafe(field), nullSafe(count));
}

7
jOOQ/src/main/java/org/jooq/impl/Repeat.java
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@ -67,6 +67,13 @@ class Repeat extends AbstractFunction<String> {
case ORACLE:
return Factory.rpad(string, Factory.length(string).mul(count), string);
// Simulation of REPEAT() for SQLite currently cannot be achieved
// using RPAD() above, as RPAD() expects characters, not strings
// Another option is documented here, though:
// http://stackoverflow.com/questions/11568496/how-to-simulate-repeat-in-sqlite
case SQLITE:
return Factory.field("replace(substr(quote(zeroblob(({0} + 1) / 2)), 3, {1}), '0', {2})", String.class, count, count, string);
case ASE:
case SQLSERVER:
return function("replicate", SQLDataType.VARCHAR, string, count);