o
    y¬´\Šv  ã                   @   sô  d Z ddlZddlmZ ddlmZ ddlmZ ddlmZ ddlm	Z	 ddlm
Z
 dd	lmZ dd
lmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ eg d¢ƒZG dd„ dejƒZG dd„ deej ƒZ G dd„ deej!ƒZ!G dd„ dej"ƒZ#ej"e#iZ$eeeeeeeeeee e!ed œZ%G d!d"„ d"ej&ƒZ'G d#d$„ d$ejj(ƒZ)G d%d&„ d&ejj*ƒZ+G d'd(„ d(ejj,ƒZ-G d)d*„ d*e	j.ƒZ/G d+d,„ d,e	j0ƒZ1dS )-a  

.. dialect:: firebird
    :name: Firebird

Firebird Dialects
-----------------

Firebird offers two distinct dialects_ (not to be confused with a
SQLAlchemy ``Dialect``):

dialect 1
  This is the old syntax and behaviour, inherited from Interbase pre-6.0.

dialect 3
  This is the newer and supported syntax, introduced in Interbase 6.0.

The SQLAlchemy Firebird dialect detects these versions and
adjusts its representation of SQL accordingly.  However,
support for dialect 1 is not well tested and probably has
incompatibilities.

Locking Behavior
----------------

Firebird locks tables aggressively.  For this reason, a DROP TABLE may
hang until other transactions are released.  SQLAlchemy does its best
to release transactions as quickly as possible.  The most common cause
of hanging transactions is a non-fully consumed result set, i.e.::

    result = engine.execute("select * from table")
    row = result.fetchone()
    return

Where above, the ``ResultProxy`` has not been fully consumed.  The
connection will be returned to the pool and the transactional state
rolled back once the Python garbage collector reclaims the objects
which hold onto the connection, which often occurs asynchronously.
The above use case can be alleviated by calling ``first()`` on the
``ResultProxy`` which will fetch the first row and immediately close
all remaining cursor/connection resources.

RETURNING support
-----------------

Firebird 2.0 supports returning a result set from inserts, and 2.1
extends that to deletes and updates. This is generically exposed by
the SQLAlchemy ``returning()`` method, such as::

    # INSERT..RETURNING
    result = table.insert().returning(table.c.col1, table.c.col2).\
                   values(name='foo')
    print result.fetchall()

    # UPDATE..RETURNING
    raises = empl.update().returning(empl.c.id, empl.c.salary).\
                  where(empl.c.sales>100).\
                  values(dict(salary=empl.c.salary * 1.1))
    print raises.fetchall()


.. _dialects: http://mc-computing.com/Databases/Firebird/SQL_Dialect.html

é    N)Úexc)Úsql)Útypes)Úutil)Údefault)Ú
reflection)Úcompiler)Ú
expression)Úquoted_name)ÚBIGINT)ÚBLOB)ÚDATE)ÚFLOAT)ÚINTEGER)ÚInteger)ÚNUMERIC)ÚSMALLINT)ÚTEXT)ÚTIME)Ú	TIMESTAMP)åÚactiveÚaddÚadminÚafterÚallÚalterÚandÚanyÚasÚascÚ	ascendingÚatÚautoÚavgÚbeforeÚbeginÚbetweenÚbigintÚ
bit_lengthÚblobÚbothÚbyÚcaseÚcastÚcharÚ	characterÚcharacter_lengthÚchar_lengthÚcheckÚcloseÚcollateÚcolumnÚcommitÚ	committedÚcomputedÚconditionalÚconnectÚ
constraintÚ
containingÚcountÚcreateÚcrossÚcstringÚcurrentÚcurrent_connectionÚcurrent_dateÚcurrent_roleÚcurrent_timeÚcurrent_timestampÚcurrent_transactionÚcurrent_userÚcursorÚdatabaseÚdateÚdayÚdecÚdecimalÚdeclarer   ÚdeleteÚdescÚ
descendingÚ
disconnectÚdistinctÚdoÚdomainÚdoubleÚdropÚelseÚendÚentry_pointÚescapeÚ	exceptionÚexecuteÚexistsÚexitÚexternalÚextractÚfetchÚfileÚfilterÚfloatÚforÚforeignÚfromÚfullÚfunctionÚgdscodeÚ	generatorÚgen_idÚglobalÚgrantÚgroupÚhavingÚhourÚifÚinÚinactiveÚindexÚinnerÚ
input_typeÚinsensitiveÚinsertÚintÚintegerÚintoÚisÚ	isolationÚjoinÚkeyÚleadingÚleftÚlengthÚlevelÚlikeÚlongÚlowerÚmanualÚmaxÚmaximum_segmentÚmergeÚminÚminuteÚmodule_nameÚmonthÚnamesÚnationalÚnaturalÚncharÚnoÚnotÚnullÚnumericÚoctet_lengthÚofÚonÚonlyÚopenÚoptionÚorÚorderÚouterÚoutput_typeÚoverflowÚpageÚpagesÚ	page_sizeÚ	parameterÚpasswordÚplanÚpositionÚ
post_eventÚ	precisionÚprimaryÚ
privilegesÚ	procedureÚ	protectedz
rdb$db_keyÚreadÚrealÚrecord_versionÚrecreateÚ	recursiveÚ
referencesÚreleaseÚreservÚ	reservingÚretainÚreturning_valuesÚreturnsÚrevokeÚrightÚrollbackÚrowsÚ	row_countÚ	savepointÚschemaÚsecondÚsegmentÚselectÚ	sensitiveÚsetÚshadowÚsharedÚsingularÚsizeÚsmallintÚsnapshotÚsomeÚsortÚsqlcodeÚ	stabilityÚstartÚstartingÚstartsÚ
statisticsÚsub_typeÚsumÚsuspendÚtableÚthenÚtimeÚ	timestampÚtoÚtrailingÚtransactionÚtriggerÚtrimÚuncommittedÚunionÚuniqueÚupdateÚupperÚuserÚusingÚvalueÚvaluesÚvarcharÚvariableÚvaryingÚviewÚwaitÚwhenÚwhereÚwhileÚwithÚworkÚwriteÚyearc                       s"   e Zd ZdZd‡ fdd„	Z‡  ZS )Ú_StringTypezBase for Firebird string types.Nc                    s    || _ tt| ƒjdi |¤Ž d S )N© )ÚcharsetÚsuperrù   Ú__init__)Úselfrû   Úkw©Ú	__class__rú   úS/var/www/html/env/lib/python3.10/site-packages/sqlalchemy/dialects/firebird/base.pyrý   O  s   z_StringType.__init__©N)Ú__name__Ú
__module__Ú__qualname__Ú__doc__rý   Ú__classcell__rú   rú   r   r  rù   L  s    rù   c                       ó&   e Zd ZdZd Zd‡ fdd„	Z‡  ZS )ÚVARCHARzFirebird VARCHAR typeNc                    ó   t t| ƒjdd|i|¤Ž d S ©Nr…   rú   )rü   r
  rý   ©rþ   r…   Úkwargsr   rú   r  rý   Y  ó   zVARCHAR.__init__r  ©r  r  r  r  Ú__visit_name__rý   r  rú   rú   r   r  r
  T  ó    r
  c                       r	  )ÚCHARzFirebird CHAR typeNc                    r  r  )rü   r  rý   r  r   rú   r  rý   b  r  zCHAR.__init__r  r  rú   rú   r   r  r  ]  r  r  c                   @   ó   e Zd Zdd„ ZdS )Ú_FBDateTimec                 C   s   dd„ }|S )Nc                 S   s&   t | ƒtjkrt | j| j| j¡S | S r  )ÚtypeÚdatetimerK   rø   r‘   rL   )rë   rú   rú   r  Úprocessh  s   z+_FBDateTime.bind_processor.<locals>.processrú   )rþ   Údialectr  rú   rú   r  Úbind_processorg  s   z_FBDateTime.bind_processorN)r  r  r  r  rú   rú   rú   r  r  f  ó    r  )ÚSHORTÚLONGÚQUADr   r   r   r   ÚINT64ÚDOUBLEr   ÚVARYINGÚCSTRINGr   c                       sP   e Zd Zdd„ Zdd„ Zdd„ Zdd„ Zd	d
„ Z‡ fdd„Z‡ fdd„Z	‡  Z
S )ÚFBTypeCompilerc                 K   ó   | j |fi |¤ŽS r  )Úvisit_SMALLINT©rþ   Útype_rÿ   rú   rú   r  Úvisit_boolean‰  ó   zFBTypeCompiler.visit_booleanc                 K   r$  r  )Úvisit_TIMESTAMPr&  rú   rú   r  Úvisit_datetimeŒ  r)  zFBTypeCompiler.visit_datetimec                 K   ó   dS )NzBLOB SUB_TYPE 1rú   r&  rú   rú   r  Ú
visit_TEXT�  ó   zFBTypeCompiler.visit_TEXTc                 K   r,  )NzBLOB SUB_TYPE 0rú   r&  rú   rú   r  Ú
visit_BLOB’  r.  zFBTypeCompiler.visit_BLOBc                 C   s$   t |dd ƒ}|d u r|S d||f S )Nrû   z%s CHARACTER SET %s)Úgetattr)rþ   r'  Úbasicrû   rú   rú   r  Ú_extend_string•  s   zFBTypeCompiler._extend_stringc                    s$   t t| ƒj|fi |¤Ž}|  ||¡S r  )rü   r#  Ú
visit_CHARr2  ©rþ   r'  rÿ   r1  r   rú   r  r3  œ  s   zFBTypeCompiler.visit_CHARc                    s<   |j st d| jj ¡‚tt| ƒj|fi |¤Ž}|  ||¡S )Nz'VARCHAR requires a length on dialect %s)	r…   r   ÚCompileErrorr  Únamerü   r#  Úvisit_VARCHARr2  r4  r   rú   r  r7     s   
ÿzFBTypeCompiler.visit_VARCHAR)r  r  r  r(  r+  r-  r/  r2  r3  r7  r  rú   rú   r   r  r#  ˆ  s    r#  c                       sŠ   e Zd ZdZdZdd„ Zdd„ Zdd„ Zd	d
„ Zd‡ fdd„	Z	dd„ Z
dd„ ZeZdd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ Z‡  ZS )Ú
FBCompilerz Firebird specific idiosyncrasiesTc                 K   r,  )NÚCURRENT_TIMESTAMPrú   )rþ   Úfnrÿ   rú   rú   r  Úvisit_now_func´  r.  zFBCompiler.visit_now_funcc                 K   ó,   d|j j| fi |¤Ž|jj| fi |¤Žf S )Nz%s STARTING WITH %s©r„   Ú_compiler_dispatchr¿   ©rþ   ÚbinaryÚoperatorrÿ   rú   rú   r  Úvisit_startswith_op_binary·  ó   þz%FBCompiler.visit_startswith_op_binaryc                 K   r<  )Nz%s NOT STARTING WITH %sr=  r?  rú   rú   r  Úvisit_notstartswith_op_binary½  rC  z(FBCompiler.visit_notstartswith_op_binaryc                 K   s,   d| j |jfi |¤Ž| j |jfi |¤Žf S )Nzmod(%s, %s))r  r„   r¿   r?  rú   rú   r  Úvisit_mod_binaryÃ  rC  zFBCompiler.visit_mod_binaryFc                    sˆ   | j jrtt| ƒj|fd|i|¤ŽS |r:t|jtjƒr"|  	d|j¡p$|j}| j
|jfd|i|¤Žd | j ||¡ S | j
|jfi |¤ŽS )NÚasfromÚaliasú )r  Ú_version_tworü   r8  Úvisit_aliasÚ
isinstancer6  r	   Ú_truncated_labelÚ_truncated_identifierr  ÚoriginalÚpreparerÚformat_alias)rþ   rG  rF  r  Ú
alias_namer   rú   r  rJ  É  s*   
ÿÿÿÿýÿþÿzFBCompiler.visit_aliasc                 K   s`   |   |jjd ¡}|   |jjd ¡}t|jjƒdkr*|   |jjd ¡}d|||f S d||f S )Nr   é   é   zSUBSTRING(%s FROM %s FOR %s)zSUBSTRING(%s FROM %s))r  ÚclausesÚlen)rþ   Úfuncrÿ   ÚsrÔ   r…   rú   rú   r  Úvisit_substring_funcß  s   zFBCompiler.visit_substring_funcc                 K   s$   | j jrd|  |¡ S d|  |¡ S )Nr1   Ústrlen)r  rI  Úfunction_argspec)rþ   rk   rÿ   rú   rú   r  Úvisit_length_funcè  s   zFBCompiler.visit_length_funcc                 K   s,   |j d urt|j ƒr| j|jfi |¤ŽS dS )NÚ )rT  rU  r  Úclause_expr)rþ   rV  rÿ   rú   rú   r  rZ  ð  s   zFBCompiler.function_argspecc                 C   r,  )Nz FROM rdb$databaserú   ©rþ   rú   rú   r  Údefault_fromú  r.  zFBCompiler.default_fromc                 K   s   d| j  |¡ S )Nzgen_id(%s, 1))rO  Úformat_sequence)rþ   Úseqrÿ   rú   rú   r  Úvisit_sequenceý  s   zFBCompiler.visit_sequencec                 K   sb   d}|j dur|d| j|j fi |¤Ž 7 }|jdur(|d| j|jfi |¤Ž 7 }|jr/|d7 }|S )zªCalled when building a ``SELECT`` statement, position is just
        before column list Firebird puts the limit and offset right
        after the ``SELECT``...
        r\  Nz	FIRST %s zSKIP %s z	DISTINCT )Ú_limit_clauser  Ú_offset_clauseÚ	_distinct)rþ   rÇ   rÿ   Úresultrú   rú   r  Úget_select_precolumns   s   

z FBCompiler.get_select_precolumnsc                 K   r,  )z<Already taken care of in the `get_select_precolumns` method.r\  rú   )rþ   rÇ   rÿ   rú   rú   r  Úlimit_clause  s   zFBCompiler.limit_clausec                    s&   ‡ fdd„t  |¡D ƒ}dd |¡ S )Nc              	      s   g | ]}ˆ   d |ddi ¡‘qS )NTF)Ú_label_select_column)Ú.0Úcr^  rú   r  Ú
<listcomp>  s    ÿÿz/FBCompiler.returning_clause.<locals>.<listcomp>z
RETURNING z, )r	   Ú_select_iterablesr�   )rþ   ÚstmtÚreturning_colsÚcolumnsrú   r^  r  Úreturning_clause  s   
þzFBCompiler.returning_clause)F)r  r  r  r  Úansi_bind_rulesr;  rB  rD  rE  rJ  rX  r[  Úvisit_char_length_funcrZ  r_  rb  rg  rh  rq  r  rú   rú   r   r  r8  ©  s"    	
r8  c                   @   s    e Zd ZdZdd„ Zdd„ ZdS )ÚFBDDLCompilerz!Firebird syntactic idiosyncrasiesc                 C   sT   |j jdur
tdƒ‚|j jdurtdƒ‚| jjr!d| j |j ¡ S d| j |j ¡ S )z;Generate a ``CREATE GENERATOR`` statement for the sequence.Nz,Firebird SEQUENCE doesn't support START WITHz.Firebird SEQUENCE doesn't support INCREMENT BYzCREATE SEQUENCE %szCREATE GENERATOR %s)ÚelementrÔ   ÚNotImplementedErrorÚ	incrementr  rI  rO  r`  )rþ   r>   rú   rú   r  Úvisit_create_sequence   s   ÿÿÿÿz#FBDDLCompiler.visit_create_sequencec                 C   s,   | j jrd| j |j¡ S d| j |j¡ S )z9Generate a ``DROP GENERATOR`` statement for the sequence.zDROP SEQUENCE %szDROP GENERATOR %s)r  rI  rO  r`  ru  )rþ   rX   rú   rú   r  Úvisit_drop_sequence7  s   ÿÿz!FBDDLCompiler.visit_drop_sequenceN)r  r  r  r  rx  ry  rú   rú   rú   r  rt    s    rt  c                       s2   e Zd ZdZeZej dg¡Z	‡ fdd„Z
‡  ZS )ÚFBIdentifierPreparerz)Install Firebird specific reserved words.Ú_c                    s   t t| ƒj|dd� d S )NT)Úomit_schema)rü   rz  rý   )rþ   r  r   rú   r  rý   L  s   zFBIdentifierPreparer.__init__)r  r  r  r  ÚRESERVED_WORDSÚreserved_wordsr   ÚILLEGAL_INITIAL_CHARACTERSrå   Úillegal_initial_charactersrý   r  rú   rú   r   r  rz  D  s    ÿrz  c                   @   r  )ÚFBExecutionContextc                 C   s   |   d| jj |¡ |¡S )z8Get the next value from the sequence using ``gen_id()``.z&SELECT gen_id(%s, 1) FROM rdb$database)Ú_execute_scalarr  Úidentifier_preparerr`  )rþ   ra  r'  rú   rú   r  Úfire_sequenceQ  s   ÿýz FBExecutionContext.fire_sequenceN)r  r  r  r„  rú   rú   rú   r  r�  P  r  r�  c                       s  e Zd ZdZdZdZdZdZdZdZ	dZ
dZdZeZeZeZeZeZeZeZg ZdZ‡ fdd„Zdd	„ Zd
d„ Zd!dd„Zd!dd„Ze j!d!dd„ƒZ"e j!d!dd„ƒZ#e j!d!dd„ƒZ$e j!d!dd„ƒZ%e j!	d!dd„ƒZ&e j!d!dd„ƒZ'e j!d!dd„ƒZ(e j!d!dd „ƒZ)‡  Z*S )"Ú	FBDialectzFirebird dialectÚfirebirdé   TFc                    s~   t t| ƒ |¡ d| jv o| jdkpd| jv o| jdk| _| js2t ¡ | _tj| jd< tj	tji| _
| jo;| j dd¡| _d S )Nr†  )rS  Ú	interbase)é   r   Úimplicit_returningT)rü   r…  Ú
initializeÚserver_version_inforI  Úischema_namesÚcopyÚsqltypesr   ÚDateTimeÚcolspecsÚ__dict__ÚgetrŠ  )rþ   Ú
connectionr   rú   r  r‹  |  s   
þ
û

ÿzFBDialect.initializec                 C   sX   |o|  ¡ }|d u rd S | ¡ |kr| j | ¡ ¡s| ¡ S | ¡ |kr*t|dd�S |S )NT)Úquote)Úrstriprè   rƒ  Ú_requires_quotesr‰   r
   ©rþ   r6  rú   rú   r  Únormalize_name�  s   ÿÿzFBDialect.normalize_namec                 C   s4   |d u rd S |  ¡ |kr| j |  ¡ ¡s| ¡ S |S r  )r‰   rƒ  r—  rè   r˜  rú   rú   r  Údenormalize_nameŸ  s   ÿÿzFBDialect.denormalize_nameNc                 C   ó$   d}|  ||  |¡g¡}| ¡ duS )zIReturn ``True`` if the given table exists, ignoring
        the `schema`.zÂ
        SELECT 1 AS has_table FROM rdb$database
        WHERE EXISTS (SELECT rdb$relation_name
                      FROM rdb$relations
                      WHERE rdb$relation_name=?)
        N©r^   rš  Úfirst)rþ   r”  Ú
table_namerÄ   Útblqryrk  rú   rú   r  Ú	has_table©  s   zFBDialect.has_tablec                 C   r›  )z9Return ``True`` if the given sequence (generator) exists.zÈ
        SELECT 1 AS has_sequence FROM rdb$database
        WHERE EXISTS (SELECT rdb$generator_name
                      FROM rdb$generators
                      WHERE rdb$generator_name=?)
        Nrœ  )rþ   r”  Úsequence_namerÄ   Úgenqryrk  rú   rú   r  Úhas_sequence¶  s   zFBDialect.has_sequencec                    ó   d}‡ fdd„|  |¡D ƒS )Nz¦
        select rdb$relation_name
        from rdb$relations
        where rdb$view_blr is null
        and (rdb$system_flag is null or rdb$system_flag = 0);
        c                    ó   g | ]	}ˆ   |d  ¡‘qS ©r   ©r™  ©rj  Úrowr^  rú   r  rl  Ö  ó    z-FBDialect.get_table_names.<locals>.<listcomp>©r^   ©rþ   r”  rÄ   rÿ   rW  rú   r^  r  Úget_table_namesÂ  s   zFBDialect.get_table_namesc                    r¤  )Nzª
        select rdb$relation_name
        from rdb$relations
        where rdb$view_blr is not null
        and (rdb$system_flag is null or rdb$system_flag = 0);
        c                    r¥  r¦  r§  r¨  r^  rú   r  rl  á  rª  z,FBDialect.get_view_names.<locals>.<listcomp>r«  r¬  rú   r^  r  Úget_view_namesØ  s   zFBDialect.get_view_namesc                 K   s0   d}|  ||  |¡g¡}| ¡ }|r|d S d S )Nzt
        SELECT rdb$view_source AS view_source
        FROM rdb$relations
        WHERE rdb$relation_name=?
        Úview_sourcerœ  )rþ   r”  Ú	view_namerÄ   rÿ   ÚqryÚrpr©  rú   rú   r  Úget_view_definitionã  s   zFBDialect.get_view_definitionc           	         s>   d}ˆ   |¡}| |d|g¡}‡ fdd„| ¡ D ƒ}|d dœS )Nzí
        SELECT se.rdb$field_name AS fname
        FROM rdb$relation_constraints rc
             JOIN rdb$index_segments se ON rc.rdb$index_name=se.rdb$index_name
        WHERE rc.rdb$constraint_type=? AND rc.rdb$relation_name=?
        zPRIMARY KEYc                    r¥  )Úfnamer§  )rj  Úrr^  rú   r  rl  ý  rª  z/FBDialect.get_pk_constraint.<locals>.<listcomp>)Úconstrained_columnsr6  )rš  r^   Úfetchall)	rþ   r”  rž  rÄ   rÿ   ÚkeyqryÚ	tablenamerk  Úpkfieldsrú   r^  r  Úget_pk_constraintñ  s
   

zFBDialect.get_pk_constraintc           
      K   sL   |   |¡}|   |¡}d}| |||g¡ ¡ }	|	d ur$t|  |	d ¡d�S d S )Naó  
        SELECT trigdep.rdb$depended_on_name AS fgenerator
        FROM rdb$dependencies tabdep
             JOIN rdb$dependencies trigdep
                  ON tabdep.rdb$dependent_name=trigdep.rdb$dependent_name
                     AND trigdep.rdb$depended_on_type=14
                     AND trigdep.rdb$dependent_type=2
             JOIN rdb$triggers trig ON
                    trig.rdb$trigger_name=tabdep.rdb$dependent_name
        WHERE tabdep.rdb$depended_on_name=?
          AND tabdep.rdb$depended_on_type=0
          AND trig.rdb$trigger_type=1
          AND tabdep.rdb$field_name=?
          AND (SELECT count(*)
           FROM rdb$dependencies trigdep2
           WHERE trigdep2.rdb$dependent_name = trigdep.rdb$dependent_name) = 2
        Ú
fgenerator)r6  )rš  r^   r�  Údictr™  )
rþ   r”  rž  Úcolumn_namerÄ   rÿ   r¹  Úcolnamer¢  Úgenrrú   rú   r  Úget_column_sequence   s   

ÿzFBDialect.get_column_sequencec                 K   sî  d}|   ||¡}|d }|  |¡}| ||g¡}	g }
	 |	 ¡ }|d u r&	 |
S |  |d ¡}|d }|d  ¡ }| j |¡}|d u rNt 	d||f ¡ t
j}nCt|tƒrf|d dkrft|d |d	 d
 d�}n+|dv rq||d ƒ}n |dkr|t|d ƒ}n|dkrŽ|d dkrŠtƒ }ntƒ }n|ƒ }d }|d d ur¿|d  ¡ }|d d…  ¡  ¡ dks±J d| ƒ‚|dd …  ¡ }|dkr¿d }||t|d ƒ |ddœ}| ¡ |krÖd|d< t|ƒdkrñ||d krñ|  |||¡}|d urñ||d< |
 |¡ q)Naó  
        SELECT r.rdb$field_name AS fname,
                        r.rdb$null_flag AS null_flag,
                        t.rdb$type_name AS ftype,
                        f.rdb$field_sub_type AS stype,
                        f.rdb$field_length/
                            COALESCE(cs.rdb$bytes_per_character,1) AS flen,
                        f.rdb$field_precision AS fprec,
                        f.rdb$field_scale AS fscale,
                        COALESCE(r.rdb$default_source,
                                f.rdb$default_source) AS fdefault
        FROM rdb$relation_fields r
             JOIN rdb$fields f ON r.rdb$field_source=f.rdb$field_name
             JOIN rdb$types t
              ON t.rdb$type=f.rdb$field_type AND
                    t.rdb$field_name='RDB$FIELD_TYPE'
             LEFT JOIN rdb$character_sets cs ON
                    f.rdb$character_set_id=cs.rdb$character_set_id
        WHERE f.rdb$system_flag=0 AND r.rdb$relation_name=?
        ORDER BY r.rdb$field_position
        r¶  Tr´  Úftypez*Did not recognize type '%s' of column '%s'Úfprecr   Úfscaleéÿÿÿÿ)r­   Úscale)r!  r"  Úflenr   r   ÚstyperR  Úfdefaulté   ÚDEFAULTzUnrecognized default value: %sÚNULLÚ	null_flagr"   )r6  r  Únullabler   Úautoincrementr•  Úsequence)r»  rš  r^   Úfetchoner™  r–  r�  r“  r   Úwarnr�  ÚNULLTYPEÚ
issubclassr   r   r   r   Úlstriprè   ÚstripÚboolr‰   rU  rÁ  Úappend)rþ   r”  rž  rÄ   rÿ   rŸ  Úpk_constraintÚ	pkey_colsr¹  rk  Úcolsr©  r6  Úorig_colnameÚcolspecÚcoltypeÚdefvalueÚdefexprÚcol_dÚseq_drú   rú   r  Úget_columns  st   
?Âÿÿÿÿû
¿zFBDialect.get_columnsc                 K   sª   d}|   |¡}| |d|g¡}t dd„ ¡}|D ]6}	|  |	d ¡}
||
 }|d s6|
|d< |  |	d ¡|d< |d	  |  |	d
 ¡¡ |d  |  |	d ¡¡ qt| ¡ ƒS )Na  
        SELECT rc.rdb$constraint_name AS cname,
               cse.rdb$field_name AS fname,
               ix2.rdb$relation_name AS targetrname,
               se.rdb$field_name AS targetfname
        FROM rdb$relation_constraints rc
             JOIN rdb$indices ix1 ON ix1.rdb$index_name=rc.rdb$index_name
             JOIN rdb$indices ix2 ON ix2.rdb$index_name=ix1.rdb$foreign_key
             JOIN rdb$index_segments cse ON
                        cse.rdb$index_name=ix1.rdb$index_name
             JOIN rdb$index_segments se
                  ON se.rdb$index_name=ix2.rdb$index_name
                     AND se.rdb$field_position=cse.rdb$field_position
        WHERE rc.rdb$constraint_type=? AND rc.rdb$relation_name=?
        ORDER BY se.rdb$index_name, se.rdb$field_position
        zFOREIGN KEYc                   S   s   d g d d g dœS )N)r6  r¶  Úreferred_schemaÚreferred_tableÚreferred_columnsrú   rú   rú   rú   r  Ú<lambda>—  s   ûz,FBDialect.get_foreign_keys.<locals>.<lambda>Úcnamer6  Útargetrnamerå  r¶  r´  ræ  Útargetfname)rš  r^   r   Údefaultdictr™  rØ  Úlistrì   )rþ   r”  rž  rÄ   rÿ   Úfkqryr¹  rk  Úfksr©  rè  Úfkrú   rú   r  Úget_foreign_keys€  s"   
ÿ
ÿzFBDialect.get_foreign_keysc           
      K   sŽ   d}|  ||  |¡g¡}t t¡}|D ]-}||d  }	d|	vr4|  |d ¡|	d< g |	d< t|d ƒ|	d< |	d  |  |d ¡¡ qt| 	¡ ƒS )Nap  
        SELECT ix.rdb$index_name AS index_name,
               ix.rdb$unique_flag AS unique_flag,
               ic.rdb$field_name AS field_name
        FROM rdb$indices ix
             JOIN rdb$index_segments ic
                  ON ix.rdb$index_name=ic.rdb$index_name
             LEFT OUTER JOIN rdb$relation_constraints
                  ON rdb$relation_constraints.rdb$index_name =
                        ic.rdb$index_name
        WHERE ix.rdb$relation_name=? AND ix.rdb$foreign_key IS NULL
          AND rdb$relation_constraints.rdb$constraint_type IS NULL
        ORDER BY index_name, ic.rdb$field_position
        Ú
index_namer6  Úcolumn_namesÚunique_flagræ   Ú
field_name)
r^   rš  r   rë  r½  r™  r×  rØ  rì  rì   )
rþ   r”  rž  rÄ   rÿ   r±  rk  Úindexesr©  Úindexrecrú   rú   r  Úget_indexes¬  s   
ÿzFBDialect.get_indexesr  )+r  r  r  r  r6  Úmax_identifier_lengthÚsupports_sequencesÚsequences_optionalÚsupports_default_valuesÚpostfetch_lastrowidÚsupports_native_booleanÚrequires_name_normalizeÚsupports_empty_insertr8  Ústatement_compilerrt  Úddl_compilerrz  rO  r#  Útype_compilerr�  Úexecution_ctx_clsr‘  r�  Úconstruct_argumentsrI  r‹  r™  rš  r   r£  r   Úcacher­  r®  r³  r»  rÁ  rã  rð  r÷  r  rú   rú   r   r  r…  [  sT    



ÿc+r…  )2r  r  Ú
sqlalchemyr   r   r   r�  r   Úsqlalchemy.enginer   r   Úsqlalchemy.sqlr   r	   Úsqlalchemy.sql.elementsr
   Úsqlalchemy.typesr   r   r   r   r   r   r   r   r   r   r   rÉ   r}  ÚStringrù   r
  r  r�  r  r‘  r�  ÚGenericTypeCompilerr#  ÚSQLCompilerr8  ÚDDLCompilerrt  ÚIdentifierPreparerrz  ÚDefaultExecutionContextr�  ÚDefaultDialectr…  rú   rú   rú   r  Ú<module>   sf   Aÿ l		
ó!t'