1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>SPI_push</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REV="MADE"
HREF="mailto:pgsql-docs@postgresql.org"><LINK
REL="HOME"
TITLE="PostgreSQL 9.3.13 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="Interface Functions"
HREF="spi-interface.html"><LINK
REL="PREVIOUS"
TITLE="SPI_finish"
HREF="spi-spi-finish.html"><LINK
REL="NEXT"
TITLE="SPI_pop"
HREF="spi-spi-pop.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=ISO-8859-1"><META
NAME="creation"
CONTENT="2016-05-09T21:13:26"></HEAD
><BODY
CLASS="REFENTRY"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
><A
HREF="index.html"
>PostgreSQL 9.3.13 Documentation</A
></TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
TITLE="SPI_finish"
HREF="spi-spi-finish.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="spi-interface.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="20%"
ALIGN="right"
VALIGN="top"
><A
TITLE="SPI_pop"
HREF="spi-spi-pop.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="SPI-SPI-PUSH"
></A
>SPI_push</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN61802"
></A
><H2
>Name</H2
>SPI_push -- push SPI stack to allow recursive SPI usage</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN61807"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>void SPI_push(void)</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN61809"
></A
><H2
>Description</H2
><P
> <CODE
CLASS="FUNCTION"
>SPI_push</CODE
> should be called before executing another
procedure that might itself wish to use SPI.
After <CODE
CLASS="FUNCTION"
>SPI_push</CODE
>, SPI is no longer in a
<SPAN
CLASS="QUOTE"
>"connected"</SPAN
> state, and SPI function calls will be rejected unless
a fresh <CODE
CLASS="FUNCTION"
>SPI_connect</CODE
> is done. This ensures a clean
separation between your procedure's SPI state and that of another procedure
you call. After the other procedure returns, call
<CODE
CLASS="FUNCTION"
>SPI_pop</CODE
> to restore access to your own SPI state.
</P
><P
> Note that <CODE
CLASS="FUNCTION"
>SPI_execute</CODE
> and related functions
automatically do the equivalent of <CODE
CLASS="FUNCTION"
>SPI_push</CODE
> before
passing control back to the SQL execution engine, so it is not necessary
for you to worry about this when using those functions.
Only when you are directly calling arbitrary code that might contain
<CODE
CLASS="FUNCTION"
>SPI_connect</CODE
> calls do you need to issue
<CODE
CLASS="FUNCTION"
>SPI_push</CODE
> and <CODE
CLASS="FUNCTION"
>SPI_pop</CODE
>.
</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="spi-spi-finish.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="spi-spi-pop.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>SPI_finish</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="spi-interface.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>SPI_pop</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
|