Zeta Components Manual :: Docs For Class ezcDbSchemaSqliteWriter
DatabaseSchema::ezcDbSchemaSqliteWriter
Class ezcDbSchemaSqliteWriter
Handler for storing database schemas and applying differences that uses SQLite as backend.
Source for this file: /DatabaseSchema/src/handlers/sqlite/writer.php
ezcDbSchemaCommonSqlWriter | --ezcDbSchemaSqliteWriter
| Version: | //autogentag// |
Inherited Member Variables
| From ezcDbSchemaCommonSqlWriter | |
|---|---|
| protected |
ezcDbSchemaCommonSqlWriter::$queries
|
| protected |
ezcDbSchemaCommonSqlWriter::$schema
|
Method Summary
| public void |
applyDiffToDb(
$db
, $dbSchemaDiff
)
Applies the differences defined in $dbSchemaDiff to the database referenced by $db. |
| public array(string) |
convertDiffToDDL(
$dbSchemaDiff
)
Returns the differences definition in $dbSchema as database specific SQL DDL queries. |
| protected string |
convertFromGenericType(
$fieldDefinition
)
Converts the generic field type contained in $fieldDefinition to a database specific field definition. |
| protected void |
generateAddFieldSql(
$tableName
, $fieldName
, $fieldDefinition
)
Adds a "alter table" query to add the field $fieldName to $tableName with the definition $fieldDefinition. |
| protected void |
generateAddIndexSql(
$tableName
, $indexName
, $indexDefinition
)
Adds a "create index" query to add the index $indexName to the table $tableName with definition $indexDefinition to the internal list of queries |
| protected void |
generateChangeFieldSql(
$tableName
, $fieldName
, $fieldDefinition
)
Adds a "alter table" query to change the field $fieldName to $tableName with the definition $fieldDefinition. |
| protected void |
generateCreateTableSql(
$tableName
, $tableDefinition
)
Adds a "create table" query for the table $tableName with definition $tableDefinition to the internal list of queries. |
| protected string |
generateCreateTableSqlStatement(
$tableName
)
Returns a "CREATE TABLE" SQL statement part for the table $tableName. |
| protected string |
generateDefault(
$type
, $value
)
Returns an appropriate default value for $type with $value. |
| protected void |
generateDiffSchemaTableAsSql(
$tableName
, $tableDiff
)
Generates queries to upgrade a the table $tableName with the differences in $tableDiff. |
| protected void |
generateDropFieldSql(
$tableName
, $fieldName
)
Adds a "alter table" query to drop the field $fieldName from $tableName. |
| protected void |
generateDropIndexSql(
$tableName
, $indexName
)
Adds a "alter table" query to revote the index $indexName from the table $tableName to the internal list of queries. |
| protected void |
generateDropTableSql(
$tableName
)
Adds a "drop table" query for the table $tableName to the internal list of queries. |
| protected string |
generateFieldSql(
$fieldName
, $fieldDefinition
)
Returns a column definition for $fieldName with definition $fieldDefinition. |
| public int |
getDiffWriterType(
)
Returns what type of schema difference writer this class implements. |
| public int |
getWriterType(
)
Returns what type of schema writer this class implements. |
| public boolean |
isQueryAllowed(
$db
, $query
)
Checks if certain query allowed. |
Inherited Methods
| From ezcDbSchemaCommonSqlWriter | |
|---|---|
| public array(string) |
ezcDbSchemaCommonSqlWriter::convertToDDL()
Returns an array with SQL DDL statements that creates the database definition in $dbSchema |
| protected abstract void |
ezcDbSchemaCommonSqlWriter::generateAddFieldSql()
Adds a "alter table" query to add the field $fieldName to $tableName with the definition $fieldDefinition. |
| protected abstract void |
ezcDbSchemaCommonSqlWriter::generateAddIndexSql()
Adds a "alter table" query to add the index $indexName to the table $tableName with definition $indexDefinition to the internal list of queries |
| protected abstract void |
ezcDbSchemaCommonSqlWriter::generateChangeFieldSql()
Adds a "alter table" query to change the field $fieldName to $tableName with the definition $fieldDefinition. |
| protected void |
ezcDbSchemaCommonSqlWriter::generateCreateTableSql()
Adds a "create table" query for the table $tableName with definition $tableDefinition to the internal list of queries. |
| protected string |
ezcDbSchemaCommonSqlWriter::generateCreateTableSqlStatement()
Returns a "CREATE TABLE" SQL statement part for the table $tableName. |
| protected string |
ezcDbSchemaCommonSqlWriter::generateDefault()
Returns an appropriate default value for $type with $value. |
| protected void |
ezcDbSchemaCommonSqlWriter::generateDiffSchemaAsSql()
Generates queries to upgrade an existing database with the changes stored in $this->diffSchema. |
| protected void |
ezcDbSchemaCommonSqlWriter::generateDiffSchemaTableAsSql()
Generates queries to upgrade a the table $tableName with the differences in $tableDiff. |
| protected abstract void |
ezcDbSchemaCommonSqlWriter::generateDropFieldSql()
Adds a "alter table" query to drop the field $fieldName from $tableName. |
| protected abstract void |
ezcDbSchemaCommonSqlWriter::generateDropIndexSql()
Adds a "alter table" query to remote the index $indexName from the table $tableName to the internal list of queries. |
| protected abstract void |
ezcDbSchemaCommonSqlWriter::generateDropTableSql()
Adds a "drop table" query for the table $tableName to the internal list of queries. |
| protected abstract string |
ezcDbSchemaCommonSqlWriter::generateFieldSql()
Returns a column definition for $fieldName with definition $fieldDefinition. |
| protected void |
ezcDbSchemaCommonSqlWriter::generateSchemaAsSql()
Creates SQL DDL statements from a schema definitin. |
| public int |
ezcDbSchemaCommonSqlWriter::getWriterType()
Returns what type of schema writer this class implements. |
| public boolean |
ezcDbSchemaCommonSqlWriter::isQueryAllowed()
Checks if the query is allowed. |
| public void |
ezcDbSchemaCommonSqlWriter::saveToDb()
Creates the tables contained in $schema in the database that is related to $db |
Methods
applyDiffToDb
void
applyDiffToDb(
$db
, ezcDbSchemaDiff
$dbSchemaDiff
)
Applies the differences defined in $dbSchemaDiff to the database referenced by $db.
This method uses convertDiffToDDL to create SQL for the differences and then executes the returned SQL statements on the database handler $db.
Parameters:
| Name | Type | Description |
|---|---|---|
$db |
ezcDbHandler | |
$dbSchemaDiff |
ezcDbSchemaDiff |
convertDiffToDDL
array(string)
convertDiffToDDL(
ezcDbSchemaDiff
$dbSchemaDiff
)
Returns the differences definition in $dbSchema as database specific SQL DDL queries.
Parameters:
| Name | Type | Description |
|---|---|---|
$dbSchemaDiff |
ezcDbSchemaDiff |
convertFromGenericType
string
convertFromGenericType(
ezcDbSchemaField
$fieldDefinition
)
Converts the generic field type contained in $fieldDefinition to a database specific field definition.
Parameters:
| Name | Type | Description |
|---|---|---|
$fieldDefinition |
ezcDbSchemaField |
generateAddFieldSql
void
generateAddFieldSql(
string
$tableName
, string
$fieldName
, ezcDbSchemaField
$fieldDefinition
)
Adds a "alter table" query to add the field $fieldName to $tableName with the definition $fieldDefinition.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$fieldName |
string | |
$fieldDefinition |
ezcDbSchemaField |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateAddFieldSql() |
Adds a "alter table" query to add the field $fieldName to $tableName with the definition $fieldDefinition. |
generateAddIndexSql
void
generateAddIndexSql(
string
$tableName
, string
$indexName
, ezcDbSchemaIndex
$indexDefinition
)
Adds a "create index" query to add the index $indexName to the table $tableName with definition $indexDefinition to the internal list of queries
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$indexName |
string | |
$indexDefinition |
ezcDbSchemaIndex |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateAddIndexSql() |
Adds a "alter table" query to add the index $indexName to the table $tableName with definition $indexDefinition to the internal list of queries |
generateChangeFieldSql
void
generateChangeFieldSql(
string
$tableName
, string
$fieldName
, ezcDbSchemaField
$fieldDefinition
)
Adds a "alter table" query to change the field $fieldName to $tableName with the definition $fieldDefinition.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$fieldName |
string | |
$fieldDefinition |
ezcDbSchemaField |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateChangeFieldSql() |
Adds a "alter table" query to change the field $fieldName to $tableName with the definition $fieldDefinition. |
generateCreateTableSql
void
generateCreateTableSql(
string
$tableName
, ezcDbSchemaTable
$tableDefinition
)
Adds a "create table" query for the table $tableName with definition $tableDefinition to the internal list of queries.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$tableDefinition |
ezcDbSchemaTable |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateCreateTableSql() |
Adds a "create table" query for the table $tableName with definition $tableDefinition to the internal list of queries. |
generateCreateTableSqlStatement
string
generateCreateTableSqlStatement(
string
$tableName
)
Returns a "CREATE TABLE" SQL statement part for the table $tableName.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateCreateTableSqlStatement() |
Returns a "CREATE TABLE" SQL statement part for the table $tableName. |
generateDefault
string
generateDefault(
string
$type
, mixed
$value
)
Returns an appropriate default value for $type with $value.
Parameters:
| Name | Type | Description |
|---|---|---|
$type |
string | |
$value |
mixed |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateDefault() |
Returns an appropriate default value for $type with $value. |
generateDiffSchemaTableAsSql
void
generateDiffSchemaTableAsSql(
string
$tableName
, ezcDbSchemaTableDiff
$tableDiff
)
Generates queries to upgrade a the table $tableName with the differences in $tableDiff.
This method generates queries to migrate a table to a new version with the changes that are stored in the $tableDiff property. It will call different subfunctions for the different types of changes, and those functions will add queries to the internal list of queries that is stored in $this->queries.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$tableDiff |
ezcDbSchemaTableDiff |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateDiffSchemaTableAsSql() |
Generates queries to upgrade a the table $tableName with the differences in $tableDiff. |
generateDropFieldSql
void
generateDropFieldSql(
string
$tableName
, string
$fieldName
)
Adds a "alter table" query to drop the field $fieldName from $tableName.
will be hooked on execution stage and workaround using temporary table will be performed.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$fieldName |
string |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateDropFieldSql() |
Adds a "alter table" query to drop the field $fieldName from $tableName. |
generateDropIndexSql
void
generateDropIndexSql(
string
$tableName
, string
$indexName
)
Adds a "alter table" query to revote the index $indexName from the table $tableName to the internal list of queries.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string | |
$indexName |
string |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateDropIndexSql() |
Adds a "alter table" query to remote the index $indexName from the table $tableName to the internal list of queries. |
generateDropTableSql
void
generateDropTableSql(
string
$tableName
)
Adds a "drop table" query for the table $tableName to the internal list of queries.
Parameters:
| Name | Type | Description |
|---|---|---|
$tableName |
string |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateDropTableSql() |
Adds a "drop table" query for the table $tableName to the internal list of queries. |
generateFieldSql
string
generateFieldSql(
string
$fieldName
, ezcDbSchemaField
$fieldDefinition
)
Returns a column definition for $fieldName with definition $fieldDefinition.
Parameters:
| Name | Type | Description |
|---|---|---|
$fieldName |
string | |
$fieldDefinition |
ezcDbSchemaField |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::generateFieldSql() |
Returns a column definition for $fieldName with definition $fieldDefinition. |
getDiffWriterType
int
getDiffWriterType(
)
Returns what type of schema difference writer this class implements.
This method always returns ezcDbSchema::DATABASE
getWriterType
int
getWriterType(
)
Returns what type of schema writer this class implements.
This method always returns ezcDbSchema::DATABASE
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::getWriterType() |
Returns what type of schema writer this class implements. |
isQueryAllowed
boolean
isQueryAllowed(
$db
, string
$query
)
Checks if certain query allowed.
Perform testing if table exist for DROP TABLE query to avoid stoping execution while try to drop not existent table.
Parameters:
| Name | Type | Description |
|---|---|---|
$db |
ezcDbHandler | |
$query |
string |
Redefinition of:
| Method | Description |
|---|---|
ezcDbSchemaCommonSqlWriter::isQueryAllowed() |
Checks if the query is allowed. |
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