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ac12412ede
in whichever context happens to be current during a call of an xml.c function, use a dedicated context that will not go away until we explicitly delete it (which we do at transaction end or subtransaction abort). This makes recovery after an error much simpler --- we don't have to individually delete the data structures created by libxml. Also, we need to initialize and cleanup libxml only once per transaction (if there's no error) instead of once per function call, so it should be a bit faster. We'll need to keep an eye out for intra-transaction memory leaks, though. Alvaro and Tom.
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* xml.h
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* Declarations for XML data type support.
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*
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*
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* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/xml.h,v 1.23 2008/01/15 18:57:00 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef XML_H
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#define XML_H
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#include "fmgr.h"
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#include "nodes/execnodes.h"
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#include "nodes/primnodes.h"
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typedef struct varlena xmltype;
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#define DatumGetXmlP(X) ((xmltype *) PG_DETOAST_DATUM(X))
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#define XmlPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_XML_P(n) DatumGetXmlP(PG_GETARG_DATUM(n))
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#define PG_RETURN_XML_P(x) PG_RETURN_POINTER(x)
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extern Datum xml_in(PG_FUNCTION_ARGS);
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extern Datum xml_out(PG_FUNCTION_ARGS);
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extern Datum xml_recv(PG_FUNCTION_ARGS);
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extern Datum xml_send(PG_FUNCTION_ARGS);
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extern Datum xmlcomment(PG_FUNCTION_ARGS);
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extern Datum xmlconcat2(PG_FUNCTION_ARGS);
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extern Datum texttoxml(PG_FUNCTION_ARGS);
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extern Datum xmltotext(PG_FUNCTION_ARGS);
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extern Datum xmlvalidate(PG_FUNCTION_ARGS);
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extern Datum xpath(PG_FUNCTION_ARGS);
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extern Datum table_to_xml(PG_FUNCTION_ARGS);
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extern Datum query_to_xml(PG_FUNCTION_ARGS);
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extern Datum cursor_to_xml(PG_FUNCTION_ARGS);
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extern Datum table_to_xmlschema(PG_FUNCTION_ARGS);
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extern Datum query_to_xmlschema(PG_FUNCTION_ARGS);
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extern Datum cursor_to_xmlschema(PG_FUNCTION_ARGS);
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extern Datum table_to_xml_and_xmlschema(PG_FUNCTION_ARGS);
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extern Datum query_to_xml_and_xmlschema(PG_FUNCTION_ARGS);
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extern Datum schema_to_xml(PG_FUNCTION_ARGS);
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extern Datum schema_to_xmlschema(PG_FUNCTION_ARGS);
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extern Datum schema_to_xml_and_xmlschema(PG_FUNCTION_ARGS);
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extern Datum database_to_xml(PG_FUNCTION_ARGS);
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extern Datum database_to_xmlschema(PG_FUNCTION_ARGS);
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extern Datum database_to_xml_and_xmlschema(PG_FUNCTION_ARGS);
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typedef enum
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{
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XML_STANDALONE_YES,
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XML_STANDALONE_NO,
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XML_STANDALONE_NO_VALUE,
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XML_STANDALONE_OMITTED
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} XmlStandaloneType;
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extern xmltype *xmlconcat(List *args);
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extern xmltype *xmlelement(XmlExprState *xmlExpr, ExprContext *econtext);
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extern xmltype *xmlparse(text *data, XmlOptionType xmloption, bool preserve_whitespace);
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extern xmltype *xmlpi(char *target, text *arg, bool arg_is_null, bool *result_is_null);
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extern xmltype *xmlroot(xmltype *data, text *version, int standalone);
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extern bool xml_is_document(xmltype *arg);
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extern text *xmltotext_with_xmloption(xmltype *data, XmlOptionType xmloption_arg);
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extern char *map_sql_identifier_to_xml_name(char *ident, bool fully_escaped, bool escape_period);
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extern char *map_xml_name_to_sql_identifier(char *name);
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extern char *map_sql_value_to_xml_value(Datum value, Oid type);
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extern void AtEOXact_xml(void);
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typedef enum
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{
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XMLBINARY_BASE64,
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XMLBINARY_HEX
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} XmlBinaryType;
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extern XmlBinaryType xmlbinary;
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extern XmlOptionType xmloption;
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#endif /* XML_H */
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