/// <summary>
/// Creates a SQL Statement for insert-all operation.
/// </summary>
/// <param name="queryBuilder">The query builder to be used.</param>
/// <param name="tableName">The name of the target table.</param>
/// <param name="fields">The list of fields to be inserted.</param>
/// <param name="batchSize">The batch size of the operation.</param>
/// <param name="primaryField">The primary field from the database.</param>
/// <param name="identityField">The identity field from the database.</param>
/// <param name="hints">The table hints to be used.</param>
/// <returns>A sql statement for insert operation.</returns>
public override string CreateInsertAll(QueryBuilder queryBuilder,
string tableName,
IEnumerable <Field> fields = null,
int batchSize = Constant.DefaultBatchOperationSize,
DbField primaryField = null,
DbField identityField = null,
string hints = null)
{
// Initialize the builder
var builder = queryBuilder ?? new QueryBuilder();
// Call the base
var commandText = base.CreateInsertAll(builder,
tableName,
fields,
batchSize,
primaryField,
identityField,
hints);
// Variables needed
var databaseType = (string)null;
// Check for the identity
if (identityField != null)
{
var dbType = new ClientTypeToDbTypeResolver().Resolve(identityField.Type);
if (dbType != null)
{
databaseType = new DbTypeToDB2iSeriesStringNameResolver().Resolve(dbType.Value);
}
}
if (identityField != null)
{
// Variables needed
var commandTexts = new List <string>();
var splitted = commandText.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
// Iterate the indexes
for (var index = 0; index < splitted.Count(); index++)
{
var line = splitted[index].Trim();
var returnValue = string.IsNullOrEmpty(databaseType) ?
"SELECT SCOPE_IDENTITY()" :
$"SELECT CONVERT({databaseType}, SCOPE_IDENTITY())";
commandTexts.Add(string.Concat(line, " ; ", returnValue, " ;"));
}
// Set the command text
commandText = commandTexts.Join(" ");
}
// Return the query
return(commandText);
}
/// <summary>
/// Creates a SQL Statement for insert operation.
/// </summary>
/// <param name="queryBuilder">The query builder to be used.</param>
/// <param name="tableName">The name of the target table.</param>
/// <param name="fields">The list of fields to be inserted.</param>
/// <param name="primaryField">The primary field from the database.</param>
/// <param name="identityField">The identity field from the database.</param>
/// <param name="hints">The table hints to be used.</param>
/// <returns>A sql statement for insert operation.</returns>
public override string CreateInsert(QueryBuilder queryBuilder,
string tableName,
IEnumerable <Field> fields = null,
DbField primaryField = null,
DbField identityField = null,
string hints = null)
{
// Initialize the builder
var builder = queryBuilder ?? new QueryBuilder();
// Call the base
base.CreateInsert(builder,
tableName,
fields,
primaryField,
identityField,
hints);
// Variables needed
var databaseType = "BIGINT";
// Check for the identity
if (identityField != null)
{
var dbType = new ClientTypeToDbTypeResolver().Resolve(identityField.Type);
if (dbType != null)
{
databaseType = new DbTypeToDB2iSeriesStringNameResolver().Resolve(dbType.Value);
}
}
// Set the return value
var result = identityField != null?
string.Concat("CONVERT(", databaseType, ", SCOPE_IDENTITY())") :
primaryField != null?primaryField.Name.AsParameter(DbSetting) : "NULL";
builder
.Select()
.WriteText(result)
.As("[Result]")
.End();
// Return the query
return(builder.GetString());
}
/// <summary>
/// Creates a SQL Statement for merge-all operation.
/// </summary>
/// <param name="queryBuilder">The query builder to be used.</param>
/// <param name="tableName">The name of the target table.</param>
/// <param name="fields">The list of fields to be merged.</param>
/// <param name="qualifiers">The list of the qualifier <see cref="Field"/> objects.</param>
/// <param name="batchSize">The batch size of the operation.</param>
/// <param name="primaryField">The primary field from the database.</param>
/// <param name="identityField">The identity field from the database.</param>
/// <param name="hints">The table hints to be used.</param>
/// <returns>A sql statement for merge operation.</returns>
public override string CreateMergeAll(QueryBuilder queryBuilder,
string tableName,
IEnumerable <Field> fields,
IEnumerable <Field> qualifiers = null,
int batchSize = Constant.DefaultBatchOperationSize,
DbField primaryField = null,
DbField identityField = null,
string hints = null)
{
// Ensure with guards
GuardTableName(tableName);
GuardHints(hints);
GuardPrimary(primaryField);
GuardIdentity(identityField);
// Verify the fields
if (fields?.Any() != true)
{
throw new NullReferenceException($"The list of fields cannot be null or empty.");
}
// Check the qualifiers
if (qualifiers?.Any() == true)
{
// Check if the qualifiers are present in the given fields
var unmatchesQualifiers = qualifiers.Where(field =>
fields.FirstOrDefault(f =>
string.Equals(field.Name, f.Name, StringComparison.OrdinalIgnoreCase)) == null);
// Throw an error we found any unmatches
if (unmatchesQualifiers?.Any() == true)
{
throw new InvalidQualifiersException($"The qualifiers '{unmatchesQualifiers.Select(field => field.Name).Join(", ")}' are not " +
$"present at the given fields '{fields.Select(field => field.Name).Join(", ")}'.");
}
}
else
{
if (primaryField != null)
{
// Make sure that primary is present in the list of fields before qualifying to become a qualifier
var isPresent = fields?.FirstOrDefault(f => string.Equals(f.Name, primaryField.Name, StringComparison.OrdinalIgnoreCase)) != null;
// Throw if not present
if (isPresent == false)
{
throw new InvalidQualifiersException($"There are no qualifier field objects found for '{tableName}'. Ensure that the " +
$"primary field is present at the given fields '{fields.Select(field => field.Name).Join(", ")}'.");
}
// The primary is present, use it as a default if there are no qualifiers given
qualifiers = primaryField.AsField().AsEnumerable();
}
else
{
// Throw exception, qualifiers are not defined
throw new NullReferenceException($"There are no qualifier field objects found for '{tableName}'.");
}
}
// Get the insertable and updateable fields
var insertableFields = fields
.Where(field => !string.Equals(field.Name, identityField?.Name, StringComparison.OrdinalIgnoreCase));
var updateableFields = fields
.Where(field => !string.Equals(field.Name, primaryField?.Name, StringComparison.OrdinalIgnoreCase) &&
!string.Equals(field.Name, identityField?.Name, StringComparison.OrdinalIgnoreCase));
// Variables needed
var databaseType = (string)null;
// Check for the identity
if (identityField != null)
{
var dbType = new ClientTypeToDbTypeResolver().Resolve(identityField.Type);
if (dbType != null)
{
databaseType = new DbTypeToDB2iSeriesStringNameResolver().Resolve(dbType.Value);
}
}
else if (primaryField != null)
{
var dbType = new ClientTypeToDbTypeResolver().Resolve(primaryField.Type);
if (dbType != null)
{
databaseType = new DbTypeToDB2iSeriesStringNameResolver().Resolve(dbType.Value);
}
}
// Initialize the builder
var builder = queryBuilder ?? new QueryBuilder();
// Build the query
builder.Clear();
// Iterate the indexes
for (var index = 0; index < batchSize; index++)
{
// MERGE T USING S
queryBuilder.Merge()
.TableNameFrom(tableName, DbSetting)
.As("T")
.HintsFrom(hints)
.Using()
.OpenParen()
.Select()
.ParametersAsFieldsFrom(fields, index, DbSetting)
.CloseParen()
.As("S")
// QUALIFIERS
.On()
.OpenParen()
.WriteText(qualifiers?
.Select(
field => field.AsJoinQualifier("S", "T", DbSetting))
.Join(" AND "))
.CloseParen()
// WHEN NOT MATCHED THEN INSERT VALUES
.When()
.Not()
.Matched()
.Then()
.Insert()
.OpenParen()
.FieldsFrom(insertableFields, DbSetting)
.CloseParen()
.Values()
.OpenParen()
.AsAliasFieldsFrom(insertableFields, "S", DbSetting)
.CloseParen()
// WHEN MATCHED THEN UPDATE SET
.When()
.Matched()
.Then()
.Update()
.Set()
.FieldsAndAliasFieldsFrom(updateableFields, "T", "S", DbSetting);
// Set the output
var outputField = identityField ?? primaryField;
if (outputField != null)
{
queryBuilder
.WriteText(string.Concat("OUTPUT INSERTED.", outputField.Name.AsField(DbSetting)))
.As("[Result]");
}
// End the builder
queryBuilder.End();
}
// Return the query
return(builder.GetString());
}
/// <summary>
/// Creates a SQL Statement for merge-all operation.
/// </summary>
/// <param name="queryBuilder">The query builder to be used.</param>
/// <param name="tableName">The name of the target table.</param>
/// <param name="fields">The list of fields to be merged.</param>
/// <param name="qualifiers">The list of the qualifier <see cref="Field"/> objects.</param>
/// <param name="batchSize">The batch size of the operation.</param>
/// <param name="primaryField">The primary field from the database.</param>
/// <param name="identityField">The identity field from the database.</param>
/// <param name="hints">The table hints to be used.</param>
/// <returns>A sql statement for merge operation.</returns>
public override string CreateMergeAll(QueryBuilder queryBuilder,
string tableName,
IEnumerable <Field> fields,
IEnumerable <Field> qualifiers,
int batchSize = 10,
DbField primaryField = null,
DbField identityField = null,
string hints = null)
{
// Ensure with guards
GuardTableName(tableName);
GuardHints(hints);
GuardPrimary(primaryField);
GuardIdentity(identityField);
// Verify the fields
if (fields?.Any() != true)
{
throw new NullReferenceException($"The list of fields cannot be null or empty.");
}
// Check the primay field
if (primaryField == null)
{
throw new PrimaryFieldNotFoundException($"DB2iSeries_SqLite is using the primary key as qualifier for (INSERT or REPLACE) operation.");
}
// Check the qualifiers
if (qualifiers?.Any() == true)
{
var others = qualifiers.Where(f => !string.Equals(f.Name, primaryField?.Name, StringComparison.OrdinalIgnoreCase));
if (others?.Any() == true)
{
throw new InvalidQualifiersException($"DB2iSeries_SqLite is using the primary key as qualifier for (INSERT or REPLACE) operation. " +
$"Consider creating 'PrimaryKey' in the {tableName} and set the 'qualifiers' to NULL.");
}
}
// Initialize the builder
var builder = queryBuilder ?? new QueryBuilder();
// Variables needed
var databaseType = "BIGINT";
// Set the return value
var result = (string)null;
// Set the type
if (identityField != null)
{
var dbType = new ClientTypeToDbTypeResolver().Resolve(identityField.Type);
if (dbType != null)
{
databaseType = new DbTypeToDB2iSeriesStringNameResolver().Resolve(dbType.Value);
}
}
// Clear the builder
builder.Clear();
// Iterate the indexes
for (var index = 0; index < batchSize; index++)
{
// Build the query
builder
.Insert()
.Or()
.Replace()
.Into()
.TableNameFrom(tableName, DbSetting)
.OpenParen()
.FieldsFrom(fields, DbSetting)
.CloseParen()
.Values()
.OpenParen()
.ParametersFrom(fields, index, DbSetting)
.CloseParen()
.End();
// Check both primary and identity
if (identityField != null)
{
result = string.Concat($"CAST(COALESCE(last_insert_rowid(), {primaryField.Name.AsParameter(index, DbSetting)}) AS {databaseType})");
}
else
{
result = string.Concat($"CAST({primaryField.Name.AsParameter(index, DbSetting)} AS {databaseType})");
}
if (!string.IsNullOrEmpty(result))
{
// Set the result
builder
.Select()
.WriteText(result)
.As("Result".AsQuoted(DbSetting))
.End();
}
}
// Return the query
return(builder.GetString());
}
