SqlDelegatingConformance (Apache Calcite API)

java.lang.Object
- org.apache.calcite.sql.validate.SqlAbstractConformance
- - org.apache.calcite.sql.validate.SqlDelegatingConformance

All Implemented Interfaces:

SqlConformance
```
public class SqlDelegatingConformance
extends SqlAbstractConformance
```
Implementation of SqlConformance that delegates all methods to another object. You can create a sub-class that overrides particular methods.

Field Summary
- Fields inherited from interface org.apache.calcite.sql.validate.SqlConformance
  DEFAULT, ORACLE_10, PRAGMATIC_2003, PRAGMATIC_99, STRICT_2003, STRICT_92, STRICT_99

Constructor Summary

Constructors
Modifier Constructor and Description

protected SqlDelegatingConformance(SqlConformance delegate)
Creates a SqlDelegatingConformance.

Constructors
Modifier	Constructor and Description
`protected`	`SqlDelegatingConformance(SqlConformance delegate)` Creates a SqlDelegatingConformance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`allowAliasUnnestItems()` Whether directly alias array items in UNNEST.
`boolean`	`allowNiladicParentheses()` Whether to allow parentheses to be specified in calls to niladic functions and procedures (that is, functions and procedures with no parameters).
`boolean`	`isBangEqualAllowed()` Whether the bang-equal token != is allowed as an alternative to <> in the parser.
`boolean`	`isFromRequired()` Whether `FROM` clause is required in a `SELECT` statement.
`boolean`	`isGroupByAlias()` Whether to allow aliases from the `SELECT` clause to be used as column names in the `GROUP BY` clause.
`boolean`	`isGroupByOrdinal()` Whether `GROUP BY 2` is interpreted to mean 'group by the 2nd column in the select list'.
`boolean`	`isHavingAlias()` Whether to allow aliases from the `SELECT` clause to be used as column names in the `HAVING` clause.
`boolean`	`isInsertSubsetColumnsAllowed()` Whether to allow `INSERT` (or `UPSERT`) with no column list but fewer values than the target table.
`boolean`	`isMinusAllowed()` Whether `MINUS` is allowed as an alternative to `EXCEPT` in the parser.
`boolean`	`isSortByAlias()` Whether '`ORDER BY x`' is interpreted to mean 'sort by the select list item whose alias is x' even if there is a column called x.
`boolean`	`isSortByAliasObscures()` Whether "empno" is invalid in "select empno as x from emp order by empno" because the alias "x" obscures it.
`boolean`	`isSortByOrdinal()` Whether '`ORDER BY 2`' is interpreted to mean 'sort by the 2nd column in the select list'.
`SqlLibrary`	`semantics()` Controls the behavior of operators that are part of Standard SQL but nevertheless have different behavior in different databases.

Methods inherited from class org.apache.calcite.sql.validate.SqlAbstractConformance
allowCharLiteralAlias, allowExplicitRowValueConstructor, allowExtend, allowExtendedTrim, allowGeometry, allowHyphenInUnquotedTableName, allowPluralTimeUnits, allowQualifyingCommonColumn, isApplyAllowed, isLiberal, isLimitStartCountAllowed, isOffsetLimitAllowed, isPercentRemainderAllowed, shouldConvertRaggedUnionTypesToVarying, splitQuotedTableName

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SqlDelegatingConformance
```
protected SqlDelegatingConformance(SqlConformance delegate)
```
    Creates a SqlDelegatingConformance.
- Method Detail
  - isGroupByAlias
```
public boolean isGroupByAlias()
```
    Description copied from interface: SqlConformance
    
    Whether to allow aliases from the SELECT clause to be used as column names in the GROUP BY clause.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.BIG_QUERY, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5; false otherwise.
    
    Specified by:
    
    isGroupByAlias in interface SqlConformance
    
    Overrides:
    
    isGroupByAlias in class SqlAbstractConformance
  - isGroupByOrdinal
```
public boolean isGroupByOrdinal()
```
    Description copied from interface: SqlConformance
    
    Whether GROUP BY 2 is interpreted to mean 'group by the 2nd column in the select list'.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.BIG_QUERY, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5, SqlConformanceEnum.PRESTO; false otherwise.
    
    Specified by:
    
    isGroupByOrdinal in interface SqlConformance
    
    Overrides:
    
    isGroupByOrdinal in class SqlAbstractConformance
  - isHavingAlias
```
public boolean isHavingAlias()
```
    Description copied from interface: SqlConformance
    
    Whether to allow aliases from the SELECT clause to be used as column names in the HAVING clause.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.BIG_QUERY, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5; false otherwise.
    
    Specified by:
    
    isHavingAlias in interface SqlConformance
    
    Overrides:
    
    isHavingAlias in class SqlAbstractConformance
  - isSortByOrdinal
```
public boolean isSortByOrdinal()
```
    Description copied from interface: SqlConformance
    
    Whether 'ORDER BY 2' is interpreted to mean 'sort by the 2nd column in the select list'.
    Among the built-in conformance levels, true in SqlConformanceEnum.DEFAULT, SqlConformanceEnum.BABEL, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5, SqlConformanceEnum.ORACLE_10, SqlConformanceEnum.ORACLE_12, SqlConformanceEnum.PRAGMATIC_99, SqlConformanceEnum.PRAGMATIC_2003, SqlConformanceEnum.PRESTO, SqlConformanceEnum.SQL_SERVER_2008, SqlConformanceEnum.STRICT_92; false otherwise.
    
    Specified by:
    
    isSortByOrdinal in interface SqlConformance
    
    Overrides:
    
    isSortByOrdinal in class SqlAbstractConformance
  - isSortByAlias
```
public boolean isSortByAlias()
```
    Description copied from interface: SqlConformance
    
    Whether 'ORDER BY x' is interpreted to mean 'sort by the select list item whose alias is x' even if there is a column called x.
    Among the built-in conformance levels, true in SqlConformanceEnum.DEFAULT, SqlConformanceEnum.BABEL, SqlConformanceEnum.BIG_QUERY, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5, SqlConformanceEnum.ORACLE_10, SqlConformanceEnum.ORACLE_12, SqlConformanceEnum.SQL_SERVER_2008, SqlConformanceEnum.STRICT_92; false otherwise.
    
    Specified by:
    
    isSortByAlias in interface SqlConformance
    
    Overrides:
    
    isSortByAlias in class SqlAbstractConformance
  - isSortByAliasObscures
```
public boolean isSortByAliasObscures()
```
    Description copied from interface: SqlConformance
    
    Whether "empno" is invalid in "select empno as x from emp order by empno" because the alias "x" obscures it.
    Among the built-in conformance levels, true in SqlConformanceEnum.STRICT_92; false otherwise.
    
    Specified by:
    
    isSortByAliasObscures in interface SqlConformance
    
    Overrides:
    
    isSortByAliasObscures in class SqlAbstractConformance
  - isFromRequired
```
public boolean isFromRequired()
```
    Description copied from interface: SqlConformance
    
    Whether FROM clause is required in a SELECT statement.
    Among the built-in conformance levels, true in SqlConformanceEnum.ORACLE_10, SqlConformanceEnum.ORACLE_12, SqlConformanceEnum.STRICT_92, SqlConformanceEnum.STRICT_99, SqlConformanceEnum.STRICT_2003; false otherwise.
    
    Specified by:
    
    isFromRequired in interface SqlConformance
    
    Overrides:
    
    isFromRequired in class SqlAbstractConformance
  - isBangEqualAllowed
```
public boolean isBangEqualAllowed()
```
    Description copied from interface: SqlConformance
    
    Whether the bang-equal token != is allowed as an alternative to <> in the parser.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5, SqlConformanceEnum.ORACLE_10, SqlConformanceEnum.ORACLE_12, SqlConformanceEnum.PRESTO; false otherwise.
    
    Specified by:
    
    isBangEqualAllowed in interface SqlConformance
    
    Overrides:
    
    isBangEqualAllowed in class SqlAbstractConformance
  - isMinusAllowed
```
public boolean isMinusAllowed()
```
    Description copied from interface: SqlConformance
    
    Whether MINUS is allowed as an alternative to EXCEPT in the parser.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.LENIENT, SqlConformanceEnum.ORACLE_10, SqlConformanceEnum.ORACLE_12; false otherwise.
    Note: MySQL does not support MINUS or EXCEPT (as of version 5.5).
    
    Specified by:
    
    isMinusAllowed in interface SqlConformance
    
    Overrides:
    
    isMinusAllowed in class SqlAbstractConformance
  - isInsertSubsetColumnsAllowed
```
public boolean isInsertSubsetColumnsAllowed()
```
    Description copied from interface: SqlConformance
    
    Whether to allow INSERT (or UPSERT) with no column list but fewer values than the target table.
    The N values provided are assumed to match the first N columns of the table, and for each of the remaining columns, the default value of the column is used. It is an error if any of these columns has no default value.
    The default value of a column is specified by the DEFAULT clause in the CREATE TABLE statement, or is NULL if the column is not declared NOT NULL.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.LENIENT, SqlConformanceEnum.PRAGMATIC_99, SqlConformanceEnum.PRAGMATIC_2003; false otherwise.
    
    Specified by:
    
    isInsertSubsetColumnsAllowed in interface SqlConformance
    
    Overrides:
    
    isInsertSubsetColumnsAllowed in class SqlAbstractConformance
  - allowNiladicParentheses
```
public boolean allowNiladicParentheses()
```
    Description copied from interface: SqlConformance
    
    Whether to allow parentheses to be specified in calls to niladic functions and procedures (that is, functions and procedures with no parameters).
    For example, CURRENT_DATE is a niladic system function. In standard SQL it must be invoked without parentheses:
    VALUES CURRENT_DATE
    
    If allowNiladicParentheses, the following syntax is also valid:
    VALUES CURRENT_DATE()
    
    Of the popular databases, MySQL, Apache Phoenix and VoltDB allow this behavior; Apache Hive, HSQLDB, IBM DB2, Microsoft SQL Server, Oracle, PostgreSQL do not.
    Among the built-in conformance levels, true in SqlConformanceEnum.BABEL, SqlConformanceEnum.LENIENT, SqlConformanceEnum.MYSQL_5; false otherwise.
    
    Specified by:
    
    allowNiladicParentheses in interface SqlConformance
    
    Overrides:
    
    allowNiladicParentheses in class SqlAbstractConformance
  - allowAliasUnnestItems
```
public boolean allowAliasUnnestItems()
```
    Description copied from interface: SqlConformance
    
    Whether directly alias array items in UNNEST.
    E.g. in UNNEST(a_array, b_array) AS T(a, b), a and b will be aliases of elements in a_array and b_array respectively.
    Without this flag set, T will be the alias of the element in a_array and a, b will be the top level fields of T if T is a STRUCT type.
    Among the built-in conformance levels, true in SqlConformanceEnum.PRESTO; false otherwise.
    
    Specified by:
    
    allowAliasUnnestItems in interface SqlConformance
    
    Overrides:
    
    allowAliasUnnestItems in class SqlAbstractConformance
  - semantics
```
public SqlLibrary semantics()
```
    Description copied from interface: SqlConformance
    Controls the behavior of operators that are part of Standard SQL but nevertheless have different behavior in different databases.
    Consider the SUBSTRING operator. In ISO standard SQL, negative start indexes are converted to 1; in Google BigQuery, negative start indexes are treated as offsets from the end of the string. For example, SUBSTRING('abcde' FROM -3 FOR 2) returns 'ab' in standard SQL and 'cd' in BigQuery.
    If you specify conformance=BIG_QUERY in your connection parameters, SUBSTRING will give the BigQuery behavior. Similarly MySQL and Oracle.
    Among the built-in conformance levels:
    - SqlConformanceEnum.BIG_QUERY returns SqlLibrary.BIG_QUERY;
    - SqlConformanceEnum.MYSQL_5 returns SqlLibrary.MYSQL;
    - SqlConformanceEnum.ORACLE_10 and SqlConformanceEnum.ORACLE_12 return SqlLibrary.ORACLE;
    - otherwise returns SqlLibrary.STANDARD.
    Specified by:
    
    semantics in interface SqlConformance
    
    Overrides:
    
    semantics in class SqlAbstractConformance

Class SqlDelegatingConformance

Field Summary

Fields inherited from interface org.apache.calcite.sql.validate.SqlConformance

Constructor Summary

Method Summary

Methods inherited from class org.apache.calcite.sql.validate.SqlAbstractConformance

Methods inherited from class java.lang.Object

Constructor Detail

SqlDelegatingConformance

Method Detail

isGroupByAlias

isGroupByOrdinal

isHavingAlias

isSortByOrdinal

isSortByAlias

isSortByAliasObscures

isFromRequired

isBangEqualAllowed

isMinusAllowed

isInsertSubsetColumnsAllowed

allowNiladicParentheses

allowAliasUnnestItems

semantics